US3807497A - Orienting tubing hanger apparatus through which side pocket mandrels can pass - Google Patents

Abstract

A tubing hanger, from which multiple tubing strings are suspended, is seated in a subsea well head or casing hanger, being properly oriented with respect to a running tool by means of which the tubing hanger is lowered from a drilling vessel to seat in the casing hanger. The tubing hanger has an oval passage adapted to pass a tubing string with side pocket mandrels used for gas lift or other purposes, the tubing string being supported from an oval mandrel adapted to seat within the oval passage. The running tool is properly oriented relative to a guidance system as a reference point, the guidance system extending from the subsea floor to the drilling vessel, resulting in the multiple string tubing hanger and its several passages, including the oval passage, being properly oriented with respect to the guidance system. A locator assembly is then lowered to the tubing hanger and properly oriented with respect to its several passages, to subsequently guide the tubing string with the side pocket mandrels through the oval passage into the well bore, the oval hanger seating within the oval passage. The oval hanger has a fluid passage providing communication between regions above and below the tubing hanger.

Description

United StatesPatent 19 Baug h 1451 Apr. 30, 1974 ORIENTING TUBING HANGER APPARATUS THROUGH WHICH SIDE POCKET MANDRELS CAN PASS Benton F. Baugh, Houston, Tex.

[73] Assignee: Vetco Offshore Industries, Inc., Ventura, Calif.

22 Filed: May 8, 1973 21] Appl. No.: 358,451

[75] Inventor:

[52] US. Cl 166/85, 166/89, 285/18,

Primary Examiner-elames A. Leppink Attorney, Agent, or Firm-B'emard Kriegel [57] ABSTRACT A tubing hanger, from which multiple tubing strings are suspended, is seated in a subsea well head or casing hanger, being properly oriented with respect to a running tool by means of which the tubing hanger is lowered from a drilling vessel to seat in the casing hanger. The tubing "hanger has an oval passage adapted to pass a tubing string with side pocket mandrels used for gas lift or other purposes, the tubing string being supported from an oval mandrel adapted to seat within the oval passage. The running tool is properly oriented relative to a guidance system as a reference point,,the guidance system extending from the subsea floor to the drilling vessel, resulting in the multiple string tubing hanger and its several passages, including the oval passage, being properly oriented with respect to the guidance system. A locator assembIy'is then lowered to the tubing hanger and properly oriented with respect to its several passages, to subsequently guidethe tubing string with the side pocket mandrels through the oval passage into the well bore, the oval hanger seating within the oval passage. The oval hanger has a fluid passage providing communication between regions above and below the tubing hanger.

25 Claims, 21' Drawing Figures PATENIEDAPR 30 m4 SHEET 01 F 13 l rchj.

PATENTEDAPR 30 2974 saw as or '13 PATENTEIJAPRBO mm saw us or 13 8&6

405 Ag J T 251 SC PATENTEO APR 30 1974 SiliET 108f 13" PATENTEB APR 3 0 I974 Apiar -8. 13

saw 110? w ORIENTING TUBING HANGER APPARATUS THROUGH WHICH SIDE POCKET MANDRELS CAN PASS The present invention relates to subaqueous well bore apparatus, and more particularly to apparatus including a multiple string tubing hanger to be set and sealed in a well head or casing hanger.

Completion work in connection with oil and gas wells has required the provision of tubing hangers capable of passing large size gas lift and similar mandrels when a second tubing string is run in the well bore and supported from the tubing hanger. In completion work on land, extreme measures have been required to run the second string of tubing embodying one or more large size gas lift mandrels, such as providing completely segmented tubing hangers. When completing wells at offshore locations, the remote landing of the equipment at or near the subsea floor presents a still greater complication to the problem.

By virtue of the present invention, tubing hanger apparatus has been provided having a large passage of such shape and size as to permit easy passage of any usual variety of gas lift or other mandrels, such as side pocket mandrels, when the second tubing string is run therethrough. More specifically, the tubing hanger is provided with a large passage of oval shape through which a side pocket mandrel can pass and in which a supporting mandrel for the second tubing string is re-' ceived. Such oval shape provides ample area through which the second tubing string with side pocket mandrels can move, as well as providing space for a fluid passage between a region above the tubing hanger and the region below the tubing hanger externally of the second tubing string.

Another object of the 'inventionis to provide a locator adjacent to the tubing hanger properly oriented with respect thereto for guiding the second tubing string through the large passage and'to orient the supporting mandrel with respect to the large passage to insure its movement into the latter and its appropriate seating in the tubing hanger. In a more limited sense, the large passage is of oval shape to receive a companion supporting mandrel of oval shape. I

A further object of the invention is to provide apparatus embodying the locator, in which the locator can direct the secondtubing string into the large passage.

connected to the well head.

This invention possesses many other advantages, and

has other purposes which may be made more clearly apparent from a consideration of a form in which it may be embodied; This form is shown in the drawings accompanying and forming part of the present specifi cation. It'will now be described in detail, for the purpose f illustrating the general principles of the invention; but 'it is to be understood that such detaileddescription is not to be taken in a limiting sense.

Referring to the drawings:

FIG. 1 is a side elevational view of a subsea system used in connection with the drilling and completion of an underwater well bore;

FIG. 2 is an enlarged vertical section through the apparatus embodying the invention, and which is to be disposed in the well head casing hanger apparatus illustrated in FIG. 5b, including apparatus for setting a multiple string tubing hanger in a predetermined position, the tubing hanger itself being illustrated in its set condi-. tion;

FIGS. 3a and 3b together constitute a longitudinal section of a locator and a running tool therefor set on top of the tubing hanger, FIG. 31; being a lower continuation of FIG. 3a, FIG. 3b being taken along the lines 5 3b3b on FIGS. 11 and 12;

FIGS. 4a and 4b together constitute a longitudinal section similar to FIGS. 3a and 3b of a second tubing string and supporting mandrel being lowered on a mandrel running tool into the locator, with a second string orienting guide assembly mounted on the mandrel running tool, FIG. 4b'being a lower continuation of FIG. 4a;

FIGS. 5a and 5b are views similar to FIGS. 4a and 4b disclosing the mandrel seated in the tubing hanger after having been properly oriented with respect to the second string locator by the orienting guide assembly, FIG. 5b being a lower continuation of FIG. 5a;

- FIG. '6 is a longitudinal section taken along the line 6-6 on FIG. 17 through the tubing hanger apparatus,

illustrating first and second tubing strings disposed at the upper end of the tubing'hanger prior to their connection to passages in the tubing hanger and the second string mandrel;

FIG. 7 is a view similar to FIG. 6 illustrating the first and second tubing strings threadedly connected in the first and second passages in the tubing hanger and the tubing hanger mandrel;

FIG. 8 is a longitudinal section through the apparatus illustrated in FIG. 18 with the first and second tubing strings removed;

FIG. 9is a fragmentary longitudinal section through a portion of the tubing hanger, disclosing it latched to a surrounding casing hanger;

FIG. 10 is a fragmentary longitudinal section through the running tool forlowering the tubing hanger to the well housing, the running tool being latched to the tubing hanger;

FIG. 11 is a cross-section taken along the line 11-1 1 on FIG. 3b;

FIG. 12 is a cross-section taken along the line 12-12 on FIG. 3b;

FIG. 13 is an enlarged fragmentary section of the latch ring device for securing the second string mandrel to the tubing hanger;

FIG. 14 is an enlarged cross-section taken along the line 14-l4 on FIG. 4a;

FIG. 15 is a view similar to FIG. 13 disclosing the latch ring expanded into locking relation to the tubing in the tubing hanger and hanger mandrel;

FIG. 17 is a cross-section taken along the line 17-17 on FIG. 6;

FIG. 18 is an enlarged section taken along the line 18-18 on FIG. 8.

As illustrated in the drawings, a multipletubing string hanger 10, such as illustrated in U.S. Pat. No. 3,688,841, is to be set in sealed relation in acasing hanger 11 suitably supported, as through anothercasing hanger 12, in ahousing 13 at the top of a well bore 14 drilled into a formation underlying the floor F of an ocean, or other body of water. As is known in the art, thehousing 13 and the various casing hangers ll, 12 supported thereby are secured toa'guidance structure 15 of a guidance system, in a known manner. This guidance structure includes a base 16 havingguide posts 17 extending upwardly from its corner portions and to which are secured cables orlines 18 extending upwardly through the water to a drilling vessel (not shown) floating in the water. Ablowout preventer stack 19 is disposed at the lower end of amarine riser 20 extending upwardly to the drilling vessel, this blowout preventer stack being suitably secured to aconnector 22 attached to thehousing 13. This connector may be of any suitable type, for example, being of the hydraulic type illustrated in US. Pat. No. 3,321,217. A

suitable seal ring orgasket 23 effects a seal between the upper end of the connector and the lower end of the blowout preventer stack, anotherseal ring 24 effecting a seal between thecasing hanger housing 13 and theconnector 22.

Theconnector 22 occupies a known position with respect to theguidance structure 15, being moved downwardly with theblowout preventer stack 19 toward thehousing 13 along the guide lines 18. The connector has aguide frame 25 suitably secured thereto, the outer ends of which are attached to guidesleeves 26 having lower downwardly flaring funnels 27 secured thereto, and being slidable along the guide lines 18 and then over the guide posts. The connector has a longitudinal slot or groove 28 disposed therein which has a known orientation with respect to the guide posts 17. It is with respect to thisgroove 28 that thetubing hanger 10 is to be oriented, so that thelongitudinal passages 29, 30 extending through thetubing hanger body 39 will bear a known orientation or angular relation relative to thegroove 28 in the connector, andconsequently, with respect to the guide lines 18 andguide posts 17 of theguidance system 15, the orientation being accomplished with the structure and in the manner described hereinbelow. It is to be noted that one of thepassages 30 is of oval cross-section;

A plurality of concentric casing strings a, 35b (FIG. 5b) are connected at their upper ends toconcentric casing hangers 12, 11 which are in stacked relation and appropriately sealed against thecasing hanger housing 13. Theuppermost casing hanger 11 is the one on which thetubing hanger 10 is to seat and against which it is to be sealed, this casing hanger having a suitable downwardly taperinghanger seat 36 and aninternal lock groove 37 thereabove, theupper side 38 of which tapers in a downward and outward direction.

Thetubing hanger 10 includes themain body 39 having the plurality oflongitudinal passages 29, 30 extending therethrough. The lower end of this body is connected by means of aswivel 40 to alanding ring 41 having a downwardly taperingseating surface 42 adapted to engage thecompanion seat 36 in thecasing hanger 11. Thering 41 has a plurality ofcircumferential grooves 43 therein receiving elastomer seal rings 44 adapted to bear and seal against thecasing hanger seat 36. It also includes circumferentialinternal grooves 45 containing seal rings 46 sealing against the periphery of the lower portion of thetubing hanger body 39.

Theswivel 40 interconnects thetubing hanger body 39 andlanding ring 41, permitting the hanger body to rotate relative to the landing ring. As specifically illustrated, the swivel includes alower body member 47 threadedly secured to thebody 39 and having a downwardly facingshoulder 48 opposed to an upwardly facingshoulder 49 in the landing ring, there being suitable antifriction bearing rings 50 between and engaging the opposed shoulders. Thelanding ring 41 has an upwardly extendingskirt 51 encompassing the lower portion of thelower body member 47 and receiving the outer portion of an inherentlyexpansible retainer ring 52 in aninternal groove 53, which also extends partially into anexternal groove 54 in the lower body member. It is apparent that theretainer ring 52 prevents thelanding ring 41 from shifting longitudinally with respect to thehanger body 39 and itslower member 47, while permitting rotation of the hanger body and lower member relative to thelanding ring 41 when the latter is engaged with thecasing hanger seat 36.

Thelower body member 47 also carries a plurality of circumferentially spaced lock dogs 55 extending through circumferentially spacedradial slots 56 in the lower body member and slidable radially therein. The outer portions of the dogs are receivable within theinternal lock groove 37 in thecasing hanger 11 and with the upper downwardly and outwardly inclined cam faces 57 on the dogs engageable with the companion upper cam face orside 38 of the groove. Outward movement of each dog is limited by engagement of its upwardly directedterminal member 58 with theinner surface 59 of the lower body member above theslots 56, the dogs being shiftable radially inwardly to the extent limited by their engagement with the periphery of thetubing hanger body 39. The dogs also have downwardly and inwardly inclined externaltapered surfaces 60 engageable with an upper taperedsurface 61 on the casing hanger to be cammed radially inwardly thereof during lowering of thetubing hanger body 39 with respect to thecasing hanger 11, as described hereinbelow.

Thedogs 55 are expandable outwardly as a result of downward shifting of acam actuator sleeve 62 surrounding the tubing hanger body, this actuator sleeve having a lower portion provided with a downwardly taperingexpander surface 63 adapted'to move behind the dogs or lockelements 55 and engage companion tapered expander surfaces 64 therein. Thecam actuator sleeve 62 is longitudinally shiftable relative to thetubing hanger body 39, but is non-rotatable with respect thereto by virtue of an orienting dog or key 65 extending through aslot 66 in the cam actuator sleeve and which is also received in a longitudinal groove or keyway 67 in the tubing hanger body, this key being secured to the body by one or more cap screws 68. The orienting dog or key is secured to the tubing hanger body in a known and predetermined angular relationship relative to thelongitudinal passages 29, 30 through the hanger body.

Thecam actuator sleeve 62 is shiftable longitudinally of thetubing hanger body 39 by anactuator sleeve 69 that encompasses the upper portion of thehanger body 39 and which is threadedly secured to anupper actuator ring 70 having an inwardly extending portion orflange 71 overlying theupper end 72 of the hanger body. Downward movement of thisactuator sleeve 69 along thebody 39 is prevented by theflange 71 engaging theupper end 72 of the tubing hanger body; whereas, its upward movement is prevented by engagement of an upwardly facingshoulder 73 on the actuator sleeve with ashear ring 74 encompassing the body and secured thereto by one or more shear pins orscrews 75 extending through the ring and threaded into companion bores in the body. This shear ring is initially spaced downwardly from a downwardly facingshoulder 76 formed on and provided by an external flange 77 on the upper end of the tubing hanger body. Thus,theactuator sleeve 69 is prevented from shifting longitudinally in both upward and downward directions relative to thetubing hanger 39, but is capable of rotating with respect thereto. Such rotation will effect longitudinal shifting of thecam actuator sleeve 62 along thetubing hanger body 39 by virtue of a threadedinterconnection 78 between the lower portion of the actuator sleeve and the upper portion of the cam actuator sleeve. As noted, theactuator sleeve 69 has external right-hand threads 79 thereon meshing withcompanion internal right-hand threads 80 on the upper threadedhead portion 81 of the cam actuator sleeve. Thus, right-hand rotation of theactuator sleeve 69 will shift thecam actuator sleeve 62 longitudinally upwardly along the body to a position in which the upper end of the cam actuator sleeve engages a downwardly facing shoulder 82 on the actuator sleeve, at which time thelower expander portion 63 is elevated above thedogs 55, the latter being permitted to contract inwardly and be located completely out of the internalcasing hanger groove 37. On the other hand, left-hand rotation of theactuator sleeve 69 will effect downward movement of the,cam actuator sleeve 62 along the tubing hanger body, shifting itsexpander portion 63 behind thedogs 55 and expanding the latter outwardly into thecasing hanger groove 37.

The tubing hanger is lowered from the drilling vessel into its appropriate seating position within thecasing hanger 11, is firmly sealed thereagainst, and is appropriately oriented relative to thegroove 28 in theconnector 22, and, therefore, with respect to theblowout preventer stack 19 and the guidance system through use of a runningtool 90 connected to the tubing hanger. The running tool includes'anupper sub 91 having a threadedbox 92 threadedly secured to the lower end of a runningstring 93 of drill pipe, or the like, extendingupwardly through the marine riser to the drilling vessel. The running tool (FIG. l0) includes aninner body member 94 disposed in acounterbore 95 in the upper portion of thetubing hanger body 39 and having a suitableside seal ring 96 therein sealingly engaging against the innercylindrical wall of the counterbore. The upper portion of thehanger body 39 includes a circumferentialinternal groove 97 above its cylindrical surface having a downwardly taperinglower side 98 and an upwardly taperingupper side 99, this groove being adapted to receive asplit lock ring 100 mounted in agroove 101 defined between the inner body member and anouter guide sleeve 102 thereabove, which is spaced from the lower side of the groove to provide upper and lower guide surfaces for thesplit lock ring 100. Y

The upper portion of theouter guide sleeve 102 surrounds anupper guide member 103 constituting theupper portion of the inner body structure and threadedly secured to theinner body member 94, this guide member having an outwardly directedflange 104 overlying the upper end of theouter guide sleeve 102 and extending laterally beyond its periphery. The lock ring is expandable laterally outwardly hydraulically and is locked in its outward expanded position by anannular cylinder member 105 slidable along theinner body member 94. Thus, the annular cylinder is located within anannular space 106 between the inner body member and the outer guide sleeve. It includes a lower cylinder sleeve portion 107 slidable along alower piston'portion 108 of the inner body member, theguide member 103 having a dependingannular piston portion 109 along which anupper cylinder sleeve 110 is slidable. An inwardly directedcylinder head 111 is disposed in the space between the upper andlower pistons 109, 108,'being slidable along a reduced diameter peripheral portion 112 of the inner body member. Theupper sleeve 110 slidably seals against a suitable seal ring 1 13 in the upper annular piston, the lower cylinder sleeve 107 slidably sealing against asuitable seal ring 114 in thelower piston 108, there being a seal ring 1 15 in thecylinder head 111 slidably sealing against the periphery of the reduced diameter portion '112 of theinner body member 94.

Fluid under pressure derived from the runningstring 93 can pass into aradial port 116 between the interior of the inner body member into an upper cylinder space 117 to shift theactuating cylinder 105 downwardly along the inner body member, for the purpose of engaging an upperinclined cam face 118 on thesplit lock ring 100 to expand the latter outwardly into theinternal groove 97 in the upper portion of thetubing hanger body 39 and to then shift behind the innercylindrical surface 119 of the lock ring to retain it within the hanger body groove 97 (FIG. 10). On the other hand, when thelock ring 100 is to be released from thegroove 97, fluid under pressure is directed from the interior of theinner body'member 94 through itsside port 120 into the cylinder space 121 between thelower piston 108 andcylinder head 111 to shift the cylinder upwardly and out of engagement from thesplit latch ring 100, allowing the latter to contract from thehanger body groove 97.

Theinner body member 94 is movable longitudinally with thetop sub 91 of the runningtool 90, this top sub, however, being rotatable relative to the inner body member, because of the provision of aswivel 125 therebetween. This swivel is constituted by theexternal flange 104 on theguide member 103 projecting into aninternal groove 126 defined between a lower upwardly facingshoulder 127 of aclutch member 128 surrounding theouter guide sleeve 102, and threadedly secured to thetop sub 91, and a downwardly facing shoulder 129 provided by the end of the top sub. Rotation of thetop sub 91 relative to theinner body member 94 is facilitated by ananti-friction bearing ring 130 provided between the top sub and the inner body structure. Leakage of fluid between theguide member 103 and thetop sub 91 is prevented by a suitableside seal ring 134 in the guide member sealingly engaging the opposedinner wall of the lower portion of the top sub.

The rotary motion of the runningstring 93 and top sub' 91 is transmitted to theactuator sleeve 69 for the purpose of locking thedogs 55 in thegroove 37 in the casing hanger .11, or to release the dogs from such groove. Such transmission of rotary motion is effected by the interengagement of downwardlyfacingclutch teeth 135 at the lower end of theclutch member 128 with companion axially extendingteeth 136 formed in the upper end of theupper actuator ring 71 secured to theactuator sleeve 69.

An outer orientingsleeve 137 surrounds theclutch member 128,actuator sleeve 69, and the upper portion of thecam actuator sleeve 62, having a lower slot 138 therethrough adapted to receive the outer portion of the orienting dog or key 65, this slot terminating in a downwardly flaring mouth 139 to facilitate passage of the key into the slot. This orienting sleeve is movable longitudinally with thetop sub 91 and upperclutch member 128 by being retained within aperipheral groove 142 defined between an upwardly extendingshoulder 143 on the clutch member and aring 144 secured to the top sub by screws 144a. The orienting sleeve has a narrow,vertical groove 145 therein in which an orienting key ordog 146 is radially shiftable, this key or dog being shiftable outwardly by ahelical compression spring 147 bearing against thebase 148 of the groove and against the central portion of the dog;

The outward extent of movement of the dog is limited by engagement of its upper andlower terminals 149 with companion upper andlower stop plates 150 secured byscrews 151 to the orientingsleeve 137, the dog having upward and downward taperingexternal surfaces 152 to facilitate its longitudinal movement past obstructions that it might encounter. Thedog 146 has a circumferential extent or width conforming to the width of thegroove 28 in theconnector 22, to be forced by itsspring 147 thereinto.

Because of the swivel connection between theouter orienting sleeve 137 and thesub 91 andclutch member 128, the clutch member can transmit its rotary motion to theactuator sleeve 69, after the orientingkey 146 has expanded into theconnector groove 28, for the purpose of locking and unlocking thedogs 55 in thecasing hanger groove 37. However, prior to locking of the dogs in the groove, the rotary motion of the runningstring 93 andtop sub 91 is transferable to theouter orienting sleeve 137 for the purpose of turning the latter within theconnector 22 into a position in which its spring pressed key 146 expands outwardly into theconnector groove 28.

The runningtool 90 and tubing hanger carried thereby are specifically illustrated in various positions in US. Pat. No. 3,688,841. Accordingly, only the final set position of thehanger 10 is illustrated herein, although the different relative positions between the parts and the operation of the apparatus is described in detail below.

When thetubing hanger 10 is to be lowered and set in sealed off relation in thecasing hanger 11, itscam actuator sleeve 62 is first disposed in an upward position along thetubing hanger body 39, with the upper end of the sleeve abutting the downwardly facing shoulder 82 on theactuator sleeve 69, the lower end of the cam actuator sleeve being in its upper position with respect to thedogs 55. The runningtool 90 is secured to thetubing hanger 10, theinner body member 94 being piloted within the upper end of the tubing hanger body, with aseal sub 200 secured to the body member being located in theround passage 29 of thehanger body 10, thecylinder 105 being hydraulically actuated by fluid under pressure passing through theports 116 to be shifted downwardly to expand and retain thelock ring 100 within theupper body groove 97. At this time, theclutch teeth 135, 136 are engaged and the orientingkey 65 is located within the orienting slot 138 in the lower portion of theouter orienting sleeve 137. Accordingly, thetubing hanger 10 has a known angular relationship relative to the spring pressed orienting key ordog 146 mounted in the orienting sleeve.

A runningdart 201 is then inserted in thebody member 94 to seal off theports 116, 120. The running tool andtubing hanger 10, with atubing string 210 secured thereto, are lowered by the runningstring 93 through themarine riser 20 andblowout preventer stack 19 and into thecasing hanger body 11, until thelanding ring 41 engages thecompanion seat 36 in the casing hanger. The running string ofdrill pipe 93 and runningtool 90 are then rotated, which will effect rotation of theactuator sleeve 69, because of the engagement of theclutch elements 135, 136 with one another, and also rotation of thecam actuator sleeve 62 in view of the abutting of the upper end of the sleeve with the shoulder 82 on theactuator sleeve 69, the rotation being in a right-hand direction. Accordingly, theentire tubing hanger 10 is rotated as a unit, this rotary motion being transmitted through the orientingkey 65 to the orientingsleeve 137, which turns the spring presseddog 146 with it until the latter is opposite theconnector orienting groove 28; whereupon thespring 147 will shift the orienting key into thegroove 28, preventing further rotary motion from occurring. However, in view of the know relationship between the orientingdog 65 and the passages 29-31 through thetubing hanger body 39, and of such orienting dog with the spring pressed orientingdog 146, the engagement of the spring pressed key 146 in theconnector groove 28 places thetubing hanger body 39 is a known angular relationship with respect to theconnector 22, and, therefore, with respect to theguidance system 15 along which the connector has been placed, theconnector groove 28 bearing a known relationship to the guide posts 17 of the guidance structure.

Following landing of thelanding ring 41 against its companioncasing hanger seat 36, and the positioning of the orienting key 146 in theconnector groove 28, the runningstring 93,top sub 91 andclutch member 128 are rotated in a left-hand direction, which will rotate theactuator sleeve 69 in a left-hand direction. Since thecam actuator sleeve 62 cannot rotate, being fixed to thetubing hanger body 39 by the orientingkey 65, and to theconnector 22 through the key 65, orienting'sleeve 137, key 146 andgroove 28, thecam actuator sleeve 62 is shifted downwardly along thehanger body 39, itslower expander portion 63 moving behind the dogs or latches 55 and shifting them laterally outwardly into the casinghanger lock groove 37 with and thetubing hanger body 39 are urged downwardly,

forcing thelanding ring 41 downwardly and insuring firm leakproof sealing engagement between the seal rings 44 and thecasing hanger seat 36. Thecam actuator sleeve 62 remains behind thedogs 55 and insures the retention of thetubing hanger body 39 in its downward position locked to and sealed against the casing hanger l1.

The runningtool 90 can now be released from the settubing hanger 10. The runningdart 201 is retrieved by a wireline retrieving tool (not shown) and a releasing dart (not shown, see U.S. Pat. No. 3,688,84l) is lowered through the running string, coming to rest within theinner body 94, directing fluid under pressure through thelower ports 120 into the lower cylinderspace 121 to shift thecylinder 105 upwardly along thebody 94 from its position behind the split lock ring, thereby releasing the running tool from thetubing hanger body 100. This allows the runningstring 93 to be elevated, elevating the runningtool 90 therewith, the upper side of thelock ring 100 engaging theupper side 99 of the tubinghanger body groove 97 to shift the ring inwardly from the groove, theclutch teeth 137 on the clutch member becoming disconnected from the companionclutch teeth 136 on theactuator ring 70, and theouter orienting sleeve 137 sliding upwardly along thecam actuator sleeve 62 and completely-off the fixed orienting dog or key 65.'The upperinclined surface 152 on the spring pressed dog or key 146 will engage any obstructions th'ereabove, such as the upper end of thegroove 28, and be cammed thereby inwardly completely from theconnector 22 to move upwardly with the remainder of the runningtool 90 through theblowout preventer stack 19 and marine conductor orriser 20 to the drilling vessel. Thetubing hanger 10 remains secured in its oriented position within thecasing hanger 11, with thetubing string 210 extending into the well bore to the desired depth.

After thetubing hanger 10 has been set with its passages appropriately oriented with respect to the orientinggroove 28 in the connector, a locator (FIG. 3a, 3b) is lowered in place to subsequently guide a second string of tubing 210a into and through the secondoval passage 30 in the tubing hanger (see FIG. 4b). As shown, a secondstring locator apparatus 220 is provided having alower body portion 221 and an elongate locator sleeve portion 222- extending upwardly therefrom. This locator body has alongitudinal groove 219 therein receiving. an orienting key 224 receivable within the orientinggroove 28 of the connector, in the same manner as the key 146 is used in setting thetubing hanger 10 in its appropriate position within the-casing hanger housing 13. Essentially thesame running tool 90 is used with the exception that theouter orienting sleeve 137 is removed. The runningtool 90 is connected to thelocator body 221 in the same manner as it was connected to thetubing hanger 10. Thus, theinner body member 94 of the running tool is inserted within the locator body until theclutch member 128 engages'theupper end 222 of the body. At this time, thelatch ring 100 is disposed opposite the internalcircumferential groove 223 in the body, permitting thecylinder sleeve 105 to'be shifteddownwardly hydraulically to force and retain the latch ring l00outwardly in thebody groove 223, and in that manner releasably securing the runningtool 90 to the locator apparatus -Alocator guide member 225 is suitably secured to the lower portion of the body, as by means ofscrews 227, this locator member having a downwardly taperingguide surface 228 for guiding the second tubing string into itsoval passage 30a, as described hereinbelow. Thelocator member 225 is secured to thebody 221, such that theoval passage 30a is a predetermined angular distance from the orientingkey 224, as for example, opposite the orienting key. Accordingly, the disposition of the orienting key 224 'in the orientinggroove 28 will place theoval body passage 30a in alignment with theoval passage 30 through thetubing hanger 10.

It is to be noted thatthelocator sleeve 222 has an inclinedcam surface 230 therein extending from its upper end to alongitudinal groove 231, which, asdescribed hereinbelow, has the purpose of guiding the second tubing string 210a into its appropriate position through theoval body passage 30a. Thegroove 231 and orienting key 224 lie in the same vertical plane.

The running too] is secured to the lower end of a tubular runningstring 93, such as drill pipe, and is lowered into thelocator sleeve 223 until the latch ring is opposite thebody groove 223, whereupon the cylinder sleeve is subjected to fluid pressure and shifted downwardly behind the latch ring, shifting it outwardly into thegroove 223 and thereby locking thelocator apparatus 220 to the running tool. The running tool is then lowered through themarine riser 20 and into a position in which the lower surface of thelocator member 225 engages the upper end of thetubing hanger 10. The runningstring 93 is then rotated until the orientingkey 224 is forced by itsspring 147 outwardly into the orientinggroove 28 in theconnector 22, which will then place theoval body passage 30a in appropriate alignment with the ovaltubing hanger passage 30, and thegroove 231 in the same vertical plane as thegroove 28. To insure that thecylinder sleeve 105 will remain in its locked position behind thelatch ring 100, a runningdart 201 is inserted in the running tool to blank off theports 116, in the latter leading to the cylinder sleeve. After the secondstring locator apparatus 220 has been landed and properly oriented, the running dart 201' is retrieved by means of a suitable wireline tool (not shown) and a releasing dart, such as the dart shown in FIG. 4 of U.S. Pat. No. 3,688,841, is lowered through the running string and into the running tool, whereupon the fluid in the runningstring 93 can be subjected to pressure to'effect an upward shifting of thecylinder sleeve 105 from its position behind thelatch ring 100. An upward pull can now be taken on the runningstring 93 which will cause the latch ring 1.00 to be cammed inwardly from thegroove 223, allowing the runningtool 90 to be elevated by the runningstring 93 to the drilling vessel, leaving the secondstring locator apparatus 220 in its'proper oriented position on top of thetubing hanger 10,

- The second tubing string 210a (FIGS. 4a, 4b) is then run downwardly through themarine riser 20, thelocator 220 and theoval passages 30a, 30 into the well bore; This second tubing string may have one or more side pocket mandrels (not shown) thereon, the maximum distance across the tubing string 210a and its side pocket mandrel being less than themajor axis distance 250 across each of the oval passages. The upper end of the second tubing string 210a is threadedly secured to anoval mandrel 251, conforming in shape to the oval passages and with its dimensions slightly less than the corresponding dimensions of the oval passages. The tubing string 210a communicates with amandrel passage 252 extending longitudinally through the mandrel at the one side thereof, this passage having an upper internalleft hand thread 253 and acylindrical sealing surface 254 above the thread. The mandrel also has asecond bore 255 at the other side thereof provided with alower nipple 256 threadedly secured thereto and having' a taperedlower end 257. This nipple hasside ports 258 therethrough for the passage of fluid through thebore 255 and the side ports. The mandrel has a second internalleft hand thread 259 in the upper portion of the bore and a sealingsurface 260 above such thread.

A cylindrical mandrel running too] 261 has its lower portion inserted in the second string mandrel bore 252 and has an externalleft hand thread 262 meshing with the internalleft hand thread 253, as well asseal rings 264 sealingly engaging thecylindrical sealing surface 254 of themandrel 251. Themandrel running tool 261 also carries a split inherentlyexpansible lock ring 265 engaging the upper surface of aring 266 resting on themandrel 251 and retained initially in retracted position by an encompassingmandrel skirt 267 surrounding the upper taperedportion 268 of the lock ring. Thering 266 is prevented from turning by apin 269 secured to the top of the oval mandrel and extending upwardly through anotch 269a in the ring (FIG. 18). Thepin 269 is disposed between the ends of thelock ring 265 to limit the extent of its turning to a few degrees only, theopen end 265a of the lock ring being prevented from shifting to any substantial extent laterally of the axis of thepassage 252 by a pair of spaced vertical pins 26911 secured to the upper end of the mandrel 251and disposed externally of the lock ring to be engaged thereby, as disclosed in FIG. 18, when the ring has been expanded outwardly into engagement with a companionarcuate lock groove 400 in the secondoval passage 30 and which is disposed at one end portion of the oval passage.

Themandrel running tool 261 has an upper reduceddiameter portion 269 extending through anorientation guide frame 270 that rests upon an upwardly facingshoulder 271 of the running tool, this guide frame having the upper end of an annulus pin orrod 272 firmly secured thereto and extending into thesecond bore 255 of the oval mandrel. The guide frame carries aguide member 273 having anenlarged opening 274 receiving thecentral hub part 275 of the guide frame (FIGv l4) and which can shift laterally of the hub in several directions and pivot to a limited extent about the axis of avertical pin 276 fixed to theguide member 273 and extending into atransverse slot 277 in the guide frame. The guide assembly has an orientinglug 278 at one side thereof opposite the .mandrel running tool 261 for coaction with thecam surface 230 of the secondstring locator sleeve 222. This lug can slide downwardly along the cam surface, and in so doing will turn the entire apparatus, including the runningtool 261,pin 272 andmandrel 251 within thelocator sleeve 222 until theguide lug 278 slides down into thelongitudinal groove 231 in the locator sleeve, at which time theoval mandrel 251 is in appropriate alignment with theoval passage 30a through thelocator member 225. Some lateral shifting can occur, and also relative tuming, between the runningtool 261,diaphragm 270 and therod 272 with respect to theguide member 273, because of theenlarged opening 274 in the guide member and thetransverse slot 277 receiving thepin 276 to permit the turning of theoval mandrel 251 into its position of alignment with theoval passage 30a. Such shifting insures that theoval mandrel 251 will be turned into the position of alignment with theoval passage 30a despite the fact that it may have reached the upper end of thelocator sleeve 222 in a position in which the orientinglug 278 is disposed about 180 from thevertical orienting groove 231 in thelocator sleeve 222.

Theoval mandrel 271 passes through theoval passage 30a in thelocator member 225 and into theoval passage 30 of the tubing hanger, until aflange 401 on the oval mandrel comes to rest on acompanion seat 402 in the tubing hanger, as disclosed in FIGS. 5a and 5b. At this time, thenipple 256 will be disposed below thepassage 30, and side seals 403 on the oval mandrel will be in sealing engagement with a sealingsurface 404 in thepassage 30 above itsseat 402. Rotation of the runningstring 405 secured to the upper end of the runningtool 261 to the right to a small extent, such as a single turn, partially unthreads thelower portion 262 of the running too] from the left-hand thread 253 in the mandrel bore 252, elevating theskirt 267 from thelock ring 264 and permitting it to expand outwardly inherently into thelock groove 400 in the tubing hanger. The open orsplit end 265a of the lock ring will face outwardly toward the opposite end of theoval passage 30, with more than 180 of the lock ring disposed within the companionarcuate lock groove 400, thelock ring 265 extending partially across themandrel 251 to prevent its upward movement within the tubing hanger (FIGS. 6, 7, 8, 15, 18). The runningstring 405 and runningtool 261 are then turned to a further extent to the right to completely unthread the runningmandrel 261 from theoval mandrel 251, permitting the running too] and the orienting assembly carried thereby, as well as therods 272, to be elevated through themarine riser 20 to the drilling vessel.

A running tool is then lowered on the runningstring 93 through the marine riser and into thelocator 220, with thecylinder sleeve 105 in its upper position, the latch ring being retracted, until the clutch 128 engages theshoulder 222 on the upper end of thelocator body 221. An appropriate dart (not shown) is then run through the runningstring 93 and inserted in the runningtool body 94, for pressure to be applied through theupper ports 16, forcing the cylinder sleeve downwardly behind thelatch ring 100 and expanding it outwardly into thegroove 223, thereby coupling the secondstring locator apparatus 220 to the runningtoolQThe running string 93 is now elevated to elevate the running tool and the locator apparatus connected thereto through themarine riser 20 to the drilling vessel.

The second tubing string 210a with its side pocket mandrels thereon has thus been installed in the well bore, hanging appropriately from the tubing hanger l0 alongside thefirst tubing string 210 that was lowered in the well bore together with the tubing hanger itself.

First and second strings oftubing 300, 301 can now be lowered from thedrilling vessel and appropriately related to the first andsecond passages 29, 30 through thehanger body 10 and through the hanger mandrel 251 (FIG. 6). These tubing strings havelower portions 302, 303 threadedly secured, as byleft hand threads 304, 305, in parallel bores through an orientingmember 306 having an orientinglug 307 related to the tubing strings 300, 301 in the same manner as thepassage 29, 30 through thetubing hanger 10 are related to the

Claims (25)

1. In apparatus to be located in a hanger disposed above a well bore: hanger body means adapted to be seated in the hanger and having a plurality of passages therein for tubing strings to be disposed in the well bore, a first of said passages being communicable with a first tubing string, a second of said passages being of oval cross-section; a mandrel of oval crosssection adapted to be seated in said second passage and adapted to support a second tubing string disposed in the well bore, said mandrel having a third passage communicating with said second tubing string and a fourth passage establishing communicating between a region above said mandrel and a region below said mandrel externally of said second tubing string.

2. In apparatus as defined in claim 1; said second tubing string including a side pocket mandrel establishing communication between the interior and exterior of said second tubing string, the distance across said second tubing string and its side pocket mandrel being less than the major diameter of said oval passage to permit passage of said second tubing string through said oval passage.

3. In apparatus as defined in claim 1; and means for orienting said oval mandrel relative to said oval passage for movement of said oval mandrel into said oval passage.

4. In apparatus as defined in claim 1; and means for orienting said oval mandrel relative to said oval passage for movement of said oval mandrel into said oval passage; said orienting means including a locator adapted for lowering to a position above and adjacent to said hanger body means and oriented in a predetermined position with respect to said oval passage; a running tool secured to the upper portion of said mandrel for lowering said mandrel in said locator; and coengageable means on said running tool and locator for turning said mandrel in said locator, as said running tool lowers said mandrel in said locator, to a position of alignment of said mandrel with said oval passage for movement of said mandrel into said oval passage.

5. In apparatus as defined in claim 1; and means for orienting said oval mandrel relative to said oval passage for movement of said oval mandrel into said oval passage; said orienting means including a locator adapted for lowering to a position above and adjacent to said hanger body means and oriented in a predetermined position with respect to said oval passage; a running tool secured to the upper portion of said mandrel for lowering said mandrel in said locator; and coengageable means on said running tool and locator for turning said mandrel in said locator, as said running tool lowers said mandrel in said locator, to a position of alignment of said mandrel with said oval passage for movement of said mandrel into said oval passage, said coengageable means on said running tool and locator comprising an orienting device on said running tool, and a downwardly inclined cam surface in said locator engaged by said orienting device to turn said mandrel to said position of alignment as said running tool lowers said orienting device and mandrel in said locator.

6. In apparatus as defined in claim 1; and means for orienting said oval mandrel relative to said oval passage for movement of said oval mandrel into said oval passage; said orienting means including a locator adapted for lowering to a position above and adjacent to said hanger body means and oriented in a predetermined position with respect to said oval passage; a running tool secured to the upper portion of said mandrel for lowering said mandrel in said locator; and coengageable means on said running tool and locator for turning said mandrel in said locator, as said running tool lowers said mandrel in said locator, to a position of alignment of said mandrel with said oval passage for movement of said mandrel into said oval passage, said coengageable means on said running tool and locator comprising an orienting device on said running tool, and a downwardly inclined cam surface in said locator engaged by said orienting device to turn said mandrel to said position of alignment as said running tool lowers said orienting device and mandrel in said locator, said orienting device including means extending into said fourth passage, whereby said running tool, mandrel and orienting device turn as a unit in said locator.

7. In apparatus as defined in claim 1; and means for orienting said oval mandrel relative to said oval passage for movement of said oval mandrel into said oval passage; said orienting means including a locator adapted for lowering to a position above and adjacent to said hanger body means and oriented in a predetermined position with respect to said oval passage; a running tool secured to the upper portion of said mandrel for lowering said mandrel in said locator; and coengageable means on said running tool and locator for turning said mandrel in said locator, as said running tool lowers said mandrel in said locator, to a position of alignment of said mandrel with said Oval passage for movement of said mandrel into said oval passage; said locator including guide means engaged by the second tubing string to direct the second tubing string into said second passage.

8. In apparatus as defined in claim 1; and means for orienting said oval mandrel relative to said oval passage for movement of said oval mandrel into said oval passage; said orienting means including a locator adapted for lowering to a position above and adjacent to said hanger body means and oriented in a predetermined position with respect to said oval passage; a running tool secured to the upper portion of said mandrel for lowering said mandrel in said locator; and coengageable means on said running tool and locator for turning said mandrel in said locator, as said running tool lowers said mandrel in said locator, to a position of alignment of said mandrel with said oval passage for movement of said mandrel into said oval passage; said locator including guide means engaged by the second tubing string to direct the second tubing string into said second passage; said guide means having an oval passage aligned with said second passage and in which the second tubing string and mandrel pass for movement of the mandrel into said oval passage.

9. In apparatus to be disposed in a hanger located above a well bore and to be oriented in a predetermined angular position relative to a reference member above the well bore; hanger body means adapted to be seated in the hanger and having a plurality of passages therein for tubing strings to be disposed in the well bore, a first of said passages being communicable with a first tubing string, a second of said passages being of oval cross section; a running tool adapted to be secured to a running string, said running tool having a first orienting member engageable with the reference member to place said running tool in a predetermined angular position relative to the reference member; means releasably securing said running tool to said hanger body means for lowering said hanger body means into the hanger; means interconnecting said hanger body means and running tool for retaining said hanger body means in a predetermined angular position relative to said running tool, whereby to locate said hanger body means and its oval passage at a predetermined angular position relative to the reference member when said orienting member is engaged therewith; a mandrel of oval cross section adapted to be seated in said second passage and adapted to support a second tubing string disposed in the well bore, said mandrel having a third passage communicable with the second tubing string and a fourth passage establishing communicating between a region above said mandrel and a region below said mandrel externally of the second tubing string.

10. In apparatus as defined in claim 9; a locator; a second running tool adapted to be secured to a running string and releasably secured to said locator for lowering said locator to a position above and adjacent to said hanger body means; said locator having a second orienting member engageable with the reference member to place said locator in a predetermined position with respect to said oval passage; a third running tool secured to the upper portion of said mandrel for lowering said mandrel in said locator; and coengageable means on said third running tool and locator for turning said mandrel in said locator, as said third running tool lowers said mandrel in said locator, to a position of alignment of said mandrel with said oval passage for movement of said mandrel into said oval passage.

11. In apparatus as defined in claim 9; a locator; a second running tool adapted to be secured to a running string and releasably secured to said locator for lowering said locator to a position above and adjacent to said hanger body means; said locator having a second orienting member engageable with the reference member to place said locator in a predetermined position with respect to said oval passage; a third running tool secuRed to the upper portion of said mandrel for lowering said mandrel in said locator; and coengageable means on said third running tool and locator for turning said mandrel in said locator, as said third running tool lowers said mandrel in said locator, to a position of alignment of said mandrel with said oval passage for movement of said mandrel into said oval passage, said third running tool being releasably secured to said mandrel for release and removal from said mandrel after seating of said mandrel in said second passage.

12. In apparatus as defined in claim 9; a locator; a second running tool adapted to be secured to a running string and releasably secured to said locator for lowering said locator to a position above and adjacent to said hanger body means; said locator having a second orienting member engageable with the reference member to place said locator in a predetermined position with respect to said oval passage; a third running tool secured to the upper portion of said mandrel for lowering said mandrel in said locator; and coengageable means on said third running tool and locator for turning said mandrel in said locator, as said third running tool lowers said mandrel in said locator, to a position of alignment of said mandrel with said oval passage for movement of said mandrel into said oval passage; said co-engageable means on said third running tool and locator comprising an orienting device on said third running tool, and a downwardly inclined cam surface in said locator engaged by said orienting device to turn said mandrel to said position of alignment as said third running tool lowers said orienting device and mandrel in said locator.

13. In apparatus as defined in claim 9; a locator; a second running tool adapted to be secured to a running string and releasably secured to said locator for lowering said locator to a position above and adjacent to said hanger body means; said locator having a second orienting member engageable with the reference member to place said locator in a predetermined position with respect to said oval passage; a third running tool secured to the upper portion of said mandrel for lowering said mandrel in said locator; and coengageable means on said third running tool and locator for turning said mandrel in said locator, as said third running tool lowers said mandrel in said locator, to a position of alignment of said mandrel with said oval passage for movement of said mandrel into said oval passage; said coengageable means on said third running tool and locator comprising an orienting device on said third running tool, and a downwardly inclined cam surface in said locator engaged by said orienting device to turn said mandrel to said position of alignment as said third running tool lowers said orienting device and mandrel in said locator, said orienting device including means extending into said fourth passage, whereby said third running tool, mandrel and orienting device turn as a unit in said locator.

14. In apparatus as defined in claim 9; a locator; a second running tool adapted to be secured to a running string and releasably secured to said locator for lowering said locator to a position above and adjacent to said hanger body means; said locator having a second orienting member engageable with the reference member to place said locator in a predetermined position with respect to said oval passage; a third running tool secured to the upper portion of said mandrel for lowering said mandrel in said locator; and coengageable means on said third running tool and locator for turning said mandrel in said locator, as said third running tool lowers said mandrel in said locator, to a position of alignment of said mandrel with said oval passage for movement of said mandrel into said oval passage; said locator including guide means engaged by the second tubing string to direct the second tubing string into said second passage.

15. In apparatus as defined in claim 9; a locator; a second running tool adapted to be secured To a running string and releasably secured to said locator for lowering said locator to a position above and adjacent to said hanger body means; said locator having a second orienting member engageable with the reference member to place said locator in a predetermined position with respect to said oval passage; a third running tool secured to the upper portion of said mandrel for lowering said mandrel in said locator; and coengageable means on said third running tool and locator for turning said mandrel in said locator, as said third running tool lowers said mandrel in said locator, to a position of alignment of said mandrel with said oval passage for movement of said mandrel into said oval passage; said locator including guide means engaged by the second tubing string to direct the second tubing string into said second passage, said guide means having an oval passage aligned with said second passage and through which the second tubing string and mandrel pass for movement of said mandrel into said oval passage.

16. In apparatus to be located in a hanger disposed above a well bore: hanger body means adapted to be seated in the hanger and having a plurality of passages therein for tubing strings to be disposed in the well bore, a first of said passages being communicable with a first tubing string; a mandrel adapted to be seated in a second of said passages and adapted to support a second tubing string disposed in the well bore, said mandrel having a third passage communicable with said second tubing string and a fourth passage establishing communication between a region above said mandrel and a region below said mandrel externally of said second tubing string; means for orienting said mandrel relative to said second passage for movement of said mandrel into said second passage; said orienting means including a locator adapted for lowering to a position above and adjacent to said hanger body means and oriented in a predetermined position with respect to said second passage; a running tool secured to the upper portion of said mandrel for lowering said mandrel in said locator; and coengageable means on said running tool and locator for turning said mandrel and said locator, as said running tool lowers said mandrel in said locator, to a position of alignment of said mandrel with said second passage for movement of said mandrel into said second passage.

17. In apparatus as defined in claim 16; said coengageable means on said running tool and locator comprising an orienting device on said running tool, and a downwardly inclined cam surface in said locator engaged by said orienting device to turn said mandrel to said position of alignment as said running tool lowers said orienting device and mandrel in said locator.

18. In apparatus as defined in claim 16; said coengageable means on said running tool and locator comprising an orienting device on said running tool, and a downwardly inclined cam surface in said locator engaged by said orienting device to turn said mandrel to said position of alignment as said running tool lowers said orienting device and mandrel in said locator, said orienting device including means extending into said fourth passage, whereby said running tool, mandrel and orienting device turn as a unit in said locator.

19. In apparatus as defined in claim 16; said locator including guide means engaged by the second tubing string to direct the second tubing string into said second passage.

20. In apparatus to be disposed in a hanger located above a well bore and to be oriented in a predetermined angular position relative to a reference member above the well bore: hanger body means adapted to be seated in the hanger and having a plurality of passages therein for tubing strings to be disposed in the well bore, a first of said passages being communicable with a first tubing string, a second of said passages being adapted to receive a second tubing string; a running tool adapted to be secured to a running string, said running tool having a first orienting Member engageable with the reference member to place said running tool in a predetermined angular position relative to the reference member; means releasably securing said running tool to said hanger body means for lowering said hanger body means into the hanger; means interconnecting said hanger body means and running tool for retaining said hanger body means in a predetermined angular relation to said running toool, whereby to locate said hanger body means and its second passage at a predetermined angular relation relative to the reference member when said orienting member is engaged therewith; a mandrel adapted to be seated in said second passage and adapted to support the second tubing string disposed in the well bore, said mandrel having a third passage communicable with the second tubing string and a fourth passage establishing communication between a region above said mandrel and a region below said mandrel externally of the second tubing string; a locator; a second running tool adapted to be secured to a running string and releasably secured to said locator for lowering said locator to a position above and adjacent to said hanger body means; said locator having a second orienting member engageable with the reference member to place said locator in a predetermined position with respect to said second passage; a third running tool secured to the upper portion of said mandrel for lowering said mandrel in said locator; and coengageable means on said third running tool and locator for turning said mandrel in said locator as said third running tool lowers said mandrel in said locator to a position of alignment of said mandrel with said second passage for movement of said mandrel into said second passage.

21. In apparatus as defined in claim 20; said third running tool being releasably secured to said mandrel for release and removal from said mandrel after seating of said mandrel in said second passage.

22. In apparatus as defined in claim 20, said third running tool being releasably secured to said mandrel for release and removal from said mandrel after seating of said mandrel in said second passage; said coengageable means on said third running tool and locator comprising an orienting device on said third running tool, and a downwardly inclined cam surface in said locator engaged by said orienting device to turn said mandrel to said position of alignment as said third running tool lowers said orienting device and mandrel in said locator.

23. In apparatus as defined in claim 20, said third running tool being releasably secured to said mandrel for release and removal from said mandrel after seating of said mandrel in said second passage; said coengageable means on said third running tool and locator comprising an orienting device on said third running tool, and a downwardly inclined cam surface in said locator engaged by said orienting device to turn said mandrel to said position of alignment as said third running tool lowers said orienting device and mandrel in said locator, said orienting device including means extending into said fourth passage, whereby said third running tool, mandrel and orienting device turn as a unit in said locator.

24. In apparatus as defined in claim 20; said locator including guide means engaged by the second tubing string to direct the second tubing string into said second passage.

25. In apparatus as defined in claim 20; said locator including guide means engaged by the second tubing string to direct the second tubing string into said second passage; said coengageable means on said third running tool and locator comprising an orienting device on said third running tool, and a downwardly inclined cam surface in said locator engaged by said orienting device to turn said mandrel to said position of alignment as said third running tool lowers said orienting device and mandrel in said locator.

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