Slip-type whipstockTechnical field
The present invention relates to a kind of whipstock used in petroleum industry branch well drilling well operations, belong to downhole tool class, specifically, is a kind of slips location Recoverable slant machine.
Background technology
At present, the whipstock used in petroleum drilling operation mainly contains following three kinds:
One, expendable Slip-type whipstock, such whipstock is only suitable for window sidetracking operation, not recyclable, can not adapt to the requirement of Multilateral Wells.
Two, the Recoverable slant machine of preset orientation spool, if the patent No. is the self-positioning recoverable oblique device of CN200420001963.5, primarily of orientation spool assembly, whipstock assembly composition; Orientation spool assembly is made up of positioning key cover, orientation spool, sealing ring, top connection, and this assembly is connected with main hole bunch tube; Whipstock assembly is bored formed by target seeker, key spring, directional bond, lower body, two female joint, double male joint, box cupling, whipstock upper body, inclined-plane, shear screw, milling, and be designed with concave station rank in orientation spool, its internal diameter is greater than main hole casing inner diameter; Positioning key cover is diagonal cut joint pipe, is fixed in orientation spool; Directional bond is fixed on the target seeker of whipstock bottom, and between target seeker and directional bond, spring is housed, and directional bond cover is processed with internal spline, matches with the external splines of the directional bond of whipstock assembly.The subject matter that this technology exists is: need to be connected on sleeve pipe when setting of casing by orientation spool, whipstock assembly docks in down-hole with orientation spool, completes direction and location, and orientation spool position is fixing, whipstock position of windowing cannot adjust temporarily, and practicality is not strong.
Three, the whipstock of tail pipe location is relied on, as a kind of Recoverable whipstock that the patent No. is CN03243553.3, base lower end is connected with lower leg well completion tail pipe tubing string, during the completion practice of lower leg well, it is entered at present with tail pipe is same, the base upper end supported as whipstock is processed with special internal spline, when needs top branch well hole sidetracking, orientable insertion whipstock part, the orientation of whipstock part is inserted mandrel lower end and is processed with the special spline structure matched with base upper end, can make whipstock part orientation smooth inserted base afterwards.The subject matter that this technology exists is: circumference location relies on slips anchoring, axial location relies on lower contact insertion extension hanger to realize, and position of windowing regulates by adjusting long drill pipe, because adjustment drilling rod can not be long, the adjusting range of position of windowing is little, and range of application is little.
Summary of the invention
The object of the invention is to overcome existing whipstock above shortcomings, a kind of Slip-type whipstock is provided.The present invention relies on hydraulic coupling that slips anchoring is located, and realize axial, the circumference location of whipstock, do not need preset positioning seat, position of windowing can adjust according to technological requirement.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of Slip-type whipstock, is characterized in that: comprise feeding and unit of giving up, packing element sealing unit, slips anchoring unit and power transmission unit;
Described feeding and unit of giving up comprise top connection, send into bar, centering ring, baffle ring, guiding incline and back-off sub, top connection is fixedly connected with feeding bar, send into bar to be threaded with back-off sub through the through hole in the middle of centering ring, baffle ring, guiding incline, and feeding bar and back-off sub are fixed by the second shear pin, centering ring is fixed on guiding incline by the first shear pin, baffle ring is fixedly installed on to be sent on bar, and guiding incline is threaded with back-off sub;
Described packing element sealing unit comprises packing element, packing element gland, bearing torque cylinder, connecting cylinder, packing element lock sleeve, packing element locking pipe nipple and packing element jump ring, packing element and packing element gland are set on bearing torque cylinder, packing element is fixedly connected with packing element gland, packing element gland is threaded with packing element lock sleeve, bearing torque cylinder is threaded with connecting cylinder, throughly on bearing torque cylinder be provided with for liquid by promoting the first-class through hole of packing element gland motion, packing element jump ring is arranged in packing element locking pipe nipple, packing element lock sleeve inwall is provided with the sawtooth locked with packing element jump ring, packing element locking pipe nipple is fixedly connected with connecting cylinder,
Described slips anchoring unit comprises anchor cylinder, upper piston, inclined-plane cylinder, circumference slips, axial slips, locking cylinder, lower piston, slips lock sleeve, slips jump ring, slips locking pipe nipple and tail pipe, packing element lock sleeve is connected with anchor cylinder by shear pin, inclined-plane cylinder is positioned at anchor cylinder, cylinder upper end, inclined-plane and upper piston screwed connection, lower end and lower piston screwed connection, anchor cylinder has circumferential slip groove and axial slip groove, circumference slips is arranged on and coordinates protruding with inclined-plane cylinder in circumferential slip groove, axial slips is arranged on and coordinates protruding with inclined-plane cylinder in axial slip groove, locking cylinder upper end is threaded with anchor cylinder, lower end is connected with tail pipe, slips jump ring is arranged in slips locking pipe nipple, slips locking pipe nipple is fixedly connected with tail pipe, ball seat is provided with in tail pipe,
Described power transmission unit comprises power transmission cylinder and bearing torque joint, power transmission cylinder upper end is threaded with guiding incline, inside and back-off sub spline fitted, lower end is engaged with bearing torque joint and is fixed by the 3rd shear pin, and bearing torque joint, bearing torque cylinder, connecting cylinder and anchor cylinder are threaded successively.
The present invention also comprises deblocking recovery unit, described deblocking recovery unit comprises deblocking core bar, lower deblocking core bar, packing element fixture block and slips fixture block, back-off sub, upper deblocking core bar, lower deblocking core bar and ball seat are threaded successively, packing element locking pipe nipple is fixed by packing element fixture block and connecting cylinder, slips locking pipe nipple is fixed by slips fixture block and tail pipe, and on upper deblocking core bar, corresponding first-class through hole is provided with intercommunicating pore.
Described inclined-plane cylinder is provided with two prescriptions to all downward inclined-plane, ramp coordinates with circumferential slips, and lower inclined plane coordinates with axial slips, and circumferential slips and axial slips are fixed respectively by shear pin and inclined-plane cylinder.
Described bearing torque cylinder is also arranged with spacer ring, and packing element even partition is become multistage by described spacer ring.
Throughly on described upper deblocking core bar to be provided with for liquid by second through hole for promoting piston motion.
Throughly on described lower deblocking core bar be provided with for liquid by the 3rd opening for promoting lower piston motion, on inclined-plane cylinder, corresponding 3rd opening is provided with intercommunicating pore.
Described upper deblocking core bar outer wall is provided with annular groove, and during deblocking, packing element fixture block is positioned at the annular groove on deblocking core bar; Lower deblocking core bar outer wall is provided with annular groove, and during deblocking, slips fixture block is positioned at the annular groove of lower deblocking core bar.
Employing the invention has the advantages that:
One, the feeding in the present invention and unit of giving up is adopted, be connected on drill string by top connection, send into by drill string well depth of windowing, after the directed grappling of whipstock, ground rotates forward tubing string, second shear pin is cut off, and the left hand thread sending into bar and back-off sub place is thrown off, and above submits into bar, baffle ring tangles centering ring, first shear pin is cut off, and top connection, feeding bar, centering ring, baffle ring etc. is recycled to ground, realizes running tool and give up.
Two, the packing element sealing unit in the present invention is adopted, when ground is suppressed, highly pressurised liquid enters from first-class through hole, promote packing element gland, packing element lock sleeve is up, compression packing element sets, engagement simultaneously on packing element jump ring and packing element lock sleeve, makes packing element be locked in the state of setting after pressure release, sets convenient and reliable.
Three, the slips anchoring unit in the present invention is adopted, when ground is suppressed, highly pressurised liquid is entered by second through hole, the 3rd opening, upper lower piston jointly can promote inclined-plane cylinder and move down, then promotes circumferential slips and axial slips is protruding, is anchored on internal surface of sleeve pipe, simultaneously, the sawtooth of slips lock sleeve and the engagement of slips jump ring, make slips be locked in anchoring states after pressure release, grappling is convenient and reliable equally.
Four, the deblocking recovery unit in the present invention, after sidetracking completes during recovery whipstock, fishing tool hooks on guiding incline to be carried, on power transmission cylinder, back-off sub, upper and lower deblocking core bar successively on carry, packing element fixture block, slips fixture block are retracted, and packing element locking pipe nipple, slips locking pipe nipple unlock, and make packing element and slips lose latching force, reach deblocking and reclaim object, deblocking reliable in action.
Five, in the present invention, described inclined-plane cylinder is provided with two prescriptions to all downward inclined-plane, ramp coordinates with circumferential slips, lower inclined plane coordinates with axial slips, circumference slips and axial slips are fixed respectively by shear pin and inclined-plane cylinder, coordinated by inclined-plane, improve the outwardly directed reliability of slips, and ensure that circumferential slips and the outwardly directed synchronism of axial slips.
Six, in the present invention, described bearing torque cylinder is also arranged with spacer ring, and packing element even partition is become multistage by described spacer ring, adopt this structure to make packing element stressed evenly.
Seven, in the present invention, on described upper deblocking core bar, lower deblocking core bar, through being provided with is passed through for the second through hole, the 3rd opening that promote upper piston, lower piston moves for liquid, ensure that the uniformity of upper and lower piston movement, significantly can reduce the fluid pressure required for slips anchoring, thus circumferential slips and axial slips uniform force can be ensured protruding.
To sum up, the present invention does not need to pre-set special-purpose nipple, and whipstock position of windowing is adjustable flexibly; Salable lower part borehole, do not stay any remnants in well after reclaiming, well latus rectum is unaffected.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention
Be labeled as in figure: 1, top connection; 2, bar is sent into; 3, centering ring; 4, baffle ring; 5, guiding incline; 6, power transmission cylinder; 7, back-off sub; 8, upper deblocking core bar; 9, bearing torque joint; 10, packing element; 11, spacer ring; 12, packing element gland; 13, bearing torque cylinder; 14, packing element lock sleeve; 15, connecting cylinder; 16, packing element fixture block; 17, packing element locking pipe nipple, 18, packing element jump ring; 19, anchor cylinder; 20, upper piston; 21, inclined-plane cylinder; 22, lower deblocking core bar; 23, circumferential slips; 24, baffle plate; 25, screw; 26, axial slips; 27, cylinder is locked; 28, lower piston; 29, slips lock sleeve; 30, slips jump ring; 31, slips locking pipe nipple; 32, slips fixture block; 33 tail pipes; 34, steel ball; 35, ball seat; A, the first shear pin; B, the second shear pin; C, the 3rd shear pin; A, first-class through hole; B, second through hole; C, the 3rd opening.
Detailed description of the invention
Embodiment 1
A kind of Slip-type whipstock, comprises feeding and unit of giving up, packing element sealing unit, slips anchoring unit and power transmission unit.
Described feeding and unit of giving up comprise top connection 1, send into bar 2, centering ring 3, baffle ring 4, guiding incline 5 and back-off sub 7, top connection 1 is fixedly connected with feeding bar 2, send into bar 2 to be threaded with back-off sub 7 through the through hole in the middle of centering ring 3, baffle ring 4, guiding incline 5, and feeding bar 2 is fixed by the second shear pin b with back-off sub 7, centering ring 3 is fixed on guiding incline by the first shear pin a, baffle ring 4 is fixedly installed on to be sent on bar, and guiding incline is threaded with back-off sub 7; This unit is connected on drill string by top connection, well depth of windowing is sent into by drill string, after the directed grappling of whipstock, ground rotates forward tubing string, and the second shear pin b cuts off, and sends into bar 2 and throws off with the left hand thread at back-off sub 7 place, on submit into bar, baffle ring 4 tangles centering ring 3, and shear pin a cuts off, and top connection 1, feeding bar 2, centering ring 3, baffle ring 4 etc. are recycled to ground.
Described packing element sealing unit comprises packing element 10, packing element gland 12, bearing torque cylinder 13, connecting cylinder 15, packing element lock sleeve 14, packing element locking pipe nipple 17 and packing element jump ring 18, packing element 10 and packing element gland 12 are set on bearing torque cylinder 13, packing element is fixedly connected with packing element gland, packing element gland 12 is threaded with packing element lock sleeve 14, bearing torque cylinder 13 is threaded with connecting cylinder 15, throughly on bearing torque cylinder 13 be provided with for liquid by promoting the first-class through hole A of packing element gland motion, packing element jump ring 18 is arranged in packing element locking pipe nipple 17, packing element lock sleeve inwall is provided with the sawtooth locked with packing element jump ring, packing element locking pipe nipple 17 is fixedly connected with connecting cylinder 15, ground is suppressed, and highly pressurised liquid enters from A hole, promotes packing element gland 12, packing element lock sleeve 14 is up, and compression packing element sets, and packing element jump ring 18 and the engagement on packing element lock sleeve 14, make packing element be locked in the state of setting after pressure release simultaneously.
Described slips anchoring unit comprises anchor cylinder 19, upper piston 20, inclined-plane cylinder 21, circumference slips 23, axial slips 26, locking cylinder 27, lower piston 28, slips lock sleeve 29, slips jump ring 30, slips locking pipe nipple 31 and tail pipe 33, packing element lock sleeve 14 is connected with anchor cylinder 19 by shear pin, inclined-plane cylinder is positioned at anchor cylinder 19, inclined-plane cylinder 21 upper end and upper piston 20 screwed connection, lower end and lower piston 28 screwed connection, anchor cylinder has circumferential slip groove and axial slip groove, circumference slips is arranged on and coordinates protruding with inclined-plane cylinder in circumferential slip groove, axial slips is arranged on and coordinates protruding with inclined-plane cylinder in axial slip groove, locking cylinder 27 upper end is threaded with anchor cylinder 19, lower end is connected with tail pipe 33, slips jump ring 30 is arranged in slips locking pipe nipple 31, slips locking pipe nipple 31 is fixedly connected with tail pipe 33, ball seat 35 is provided with in tail pipe 33, ground is suppressed, and highly pressurised liquid is entered by B hole, C hole, and upper lower piston 20,28 jointly promotes inclined-plane cylinder 21 and moves down, promote circumferential slips 23 and axial slips 26 protruding, be anchored on internal surface of sleeve pipe.Meanwhile, sawtooth and the slips jump ring 30 of slips lock sleeve 29 engage, and make slips be locked in anchoring states after pressure release.
Described power transmission unit power transmission cylinder 6 and bearing torque joint 9, power transmission cylinder 6 upper end is threaded with guiding incline 5, inside and back-off sub 7 spline fitted, lower end is engaged with bearing torque joint 9 and is fixed by the 3rd shear pin c, and bearing torque joint 9, bearing torque cylinder 13, connecting cylinder 15 and anchor cylinder 19 are threaded successively; The pressure bear guiding incline 5 and torsion are delivered on circumferential slips 23 and axial slips 26.
The present invention also comprises deblocking recovery unit, described deblocking recovery unit comprises deblocking core bar 8, lower deblocking core bar 22, packing element fixture block 16 and slips fixture block 32, back-off sub 7, upper deblocking core bar 8, lower deblocking core bar 22 and ball seat 35 are threaded successively, packing element locking pipe nipple 17 is fixed by packing element fixture block 16 and connecting cylinder 15, slips locking pipe nipple 31 is fixed by slips fixture block 32 and tail pipe 33, and on upper deblocking core bar 8, corresponding first-class through hole is provided with intercommunicating pore.After sidetracking completes during recovery whipstock, fishing tool hooks on guiding incline to be carried, on power transmission cylinder 6, back-off sub 7, upper and lower deblocking core bar 8,22 successively on carry, packing element fixture block 8, slips fixture block 22 are retracted, packing element locking pipe nipple 17, slips locking pipe nipple 31 unlock, make packing element and slips lose latching force, reach deblocking and reclaim object.
In the present invention, described inclined-plane cylinder is provided with two prescriptions to all downward inclined-plane, ramp coordinates with circumferential slips, and lower inclined plane coordinates with axial slips, and circumferential slips and axial slips are fixed respectively by shear pin and inclined-plane cylinder.
In the present invention, described bearing torque cylinder 13 is also arranged with spacer ring 11, packing element 10 even partition is become multistage by described spacer ring 11.
In the present invention, on described upper deblocking core bar 8 through be provided with for liquid by for promote upper piston 20 move second through hole B, throughly on lower deblocking core bar 22 be provided with for liquid by the 3rd opening C for promoting lower piston motion, on inclined-plane cylinder 21, corresponding 3rd opening C is provided with intercommunicating pore.
In the present invention, described upper deblocking core bar 8 outer wall is provided with annular groove, and during deblocking, packing element fixture block 16 is positioned at the annular groove on deblocking core bar 8; Lower deblocking core bar 22 outer wall is provided with annular groove, and during deblocking, slips fixture block 32 is positioned at the annular groove of lower deblocking core bar 22; Make packing element lock pipe nipple 17, slips locking pipe nipple 31 lose connection, so make packing element, slips loses coupling mechanism force and reaches deblocking object.
Embodiment 2
A kind of slips location Recoverable slant machine, mainly comprise top connection 1, send into bar 2, centering ring 3, baffle ring 4, guiding incline 5, power transmission cylinder 6, back-off sub 7, upper deblocking core bar 8, bearing torque joint 9, packing element 10, spacer ring 11, packing element gland 12, bearing torque cylinder 13, packing element lock sleeve 14, connecting cylinder 15, packing element fixture block 16, packing element locking pipe nipple 17, packing element jump ring 18, anchor cylinder 19, upper piston 20, inclined-plane cylinder 21, lower deblocking core bar 22, circumference slips 23, baffle plate 24, screw 25, axial slips 26, locking cylinder 27, lower piston 28, slips lock sleeve 29, slips jump ring 30, slips locking pipe nipple 31, slips fixture block 32, tail pipe 33, steel ball 34, ball seat 35.
Annexation is: send into bar 2 and be connected by left hand thread with back-off sub 7 through the hole in centering ring 3, guiding incline 5, and fix with shear pin b, centering ring 3 is connected with guiding incline 5 by the first shear pin a, sends on bar 2 and is welded with baffle ring 4.Back-off sub 7 and upper deblocking core bar 8, lower deblocking core bar 22 and ball seat 35 are threaded connection successively.Power transmission cylinder 6 upper end and guiding incline 5 are threaded connection, inner and back-off sub 7 adopts spline fitted, lower end is engaged with shear pin, flange groove structure with bearing torque joint 9, bearing torque joint 9 is connected by screw thread successively with bearing torque cylinder 13, connecting cylinder 15 anchor cylinder 19, and the pressure bear guiding incline 5 and torsion are delivered on circumferential slips 23 and axial slips 26.Bearing torque cylinder 13 outer setting has packing element 10, spacer ring 11 and packing element gland 12, and packing element gland 12 is threaded with packing element lock sleeve 14.Packing element jump ring 18 is arranged in the rectangular channel of packing element locking pipe nipple 17, and packing element locking pipe nipple 17 is fixed by packing element fixture block 16 and connecting cylinder 15, and packing element lock sleeve 14 is connected with anchor cylinder 19 by shear pin.Inclined-plane cylinder 21 upper end of anchor cylinder 19 inside is connected with upper piston 20 screw thread, lower end connects with lower piston 8 screw thread, two groups of inclined-planes of inclined-plane cylinder 21 match with inclined-plane with one group of circumference slips 23 and one group of axial slips 26 respectively, slips is fixed with shear pin and inclined-plane cylinder 21, and baffle plate 24 is fixed on anchor cylinder 19 external surface by screw 25.Locking cylinder 27 upper end is connected with anchor cylinder 19 by screw thread, lower end is by being connected with tail pipe 33, lower piston 28 is connected by screw thread with slips lock sleeve 29, and slips jump ring 30 is arranged in the rectangular channel of slips locking pipe nipple 31, and slips locking pipe nipple 31 is fixed by slips fixture block 32 and tail pipe 33.
In the present invention, packing element 10 is positioned at the top of slips, both can play the effect of sealed lower portion well, can also prevent top drilling cuttings from depositing to slips position.
When deblocking core bar (upper deblocking core bar 8, lower deblocking core bar 22) is carried, positioning wedged block (packing element fixture block 16), slips fixture block 32 return to the annular groove of deblocking core bar (upper deblocking core bar 8, lower deblocking core bar 22), make packing element lock pipe nipple 17, slips locking pipe nipple 31 lose connection, so make packing element, slips loses coupling mechanism force and reaches deblocking object.Packing element lock sleeve 14, slips lock sleeve 29, packing element jump ring 18, slips jump ring 30, packing element locking pipe nipple 17, slips locking pipe nipple 31, packing element fixture block 16, slips fixture block 32 etc. can form retaining mechanism.
Slips in the present invention comprises circumferential slips 23 and axial slips 26, and circumferential slips 23 plays circumferential grappling effect, and axial slips 26 plays axial grappling effect.
Slips sets and promotes piston employing two-layer configuration (upper piston 20, lower piston 28), and its usefulness is significantly to reduce the fluid pressure required for slips anchoring.
Operating principle of the present invention is as follows:
1, the grappling of whipstock
Whipstock transferred to design in well with drill string to window position, directed, drop into steel ball 34, ground is suppressed, and highly pressurised liquid is entered upper and lower deblocking core bar 8,22 by top connection 1, feeding bar 2, back-off sub 7, then entered the annular space packing element gland 12 from the A hole from upper deblocking core bar 8, promote packing element gland 12 up, drive packing element lock sleeve 14 up, compression packing element 10, packing element 10 expands and sets simultaneously.Meanwhile packing element lock sleeve 14 is up, and inner sawtooth engages with packing element jump ring 18 (this engaging mechanism belongs to Unidirectional movement mechanism, and namely only to enter, can not move back, after can guaranteeing pressure release, packing element is locked to the state of setting).While packing element sets, highly pressurised liquid enters the upper annulus of upper piston 20, lower piston 28 respectively by hole B, C of upper deblocking core bar 8, lower deblocking core bar 22, promote descent of piston, drive inclined-plane cylinder 21 descending, inclined-plane cylinder 21 promote circumferential slips 23 again and axial slips 26 protruding, and then on grappling internal surface of sleeve pipe.When lower piston 28 is descending, drive slips lock sleeve 29 descending, sawtooth and the slips jump ring 30 of its inside engage, and after ensureing pressure release, slips are locked in anchoring states.Whipstock location grappling terminates.
2, send into tubing string to give up
After grappling completes, ground rotates forward tubing string, and shear pin b is cut off, and the feeding screw thread of bar 2 and the left hand thread of back-off sub 7 are thrown off.Upper lifting pipe post, baffle ring 4 drives centering ring 3 to move up, and the shear pin a that centering ring 3 is connected with guiding incline 5 is pulled off, and top connection 1, feeding bar 2, centering ring 3, baffle ring 4 are given up, and trip out well head.
3, window sidetracking
Under to enter to window drilling tool, complete window sidetracking operation.
4, whipstock reclaims
After sidetracking completes, under enter fishing tool carries guiding incline 5, drive power transmission cylinder 6 up, shear pin c is cut off, up the while of drive back-off sub 7, upper deblocking core bar 8, lower deblocking core bar 22, at this moment packing element fixture block 16, slips fixture block 32 slip in the groove of deblocking core bar, packing element locking pipe nipple 17 and slips locking pipe nipple 31 throw off packing element fixture block 16 and slips fixture block 32 respectively, packing element 10, circumferential slips 23, axial slips 26 is made to lose coupling mechanism force, packing element 10 bounces back, continue upper lifting pipe post, slips is also retracted, and a whole set of whipstock is tripped out well head.