CN115929241A - Hydraulic casing shaper device - Google Patents

Abstract

The invention relates to the technical field of deformation repair of oil field casings, in particular to a hydraulic casing shaper device which comprises a hydraulic cylinder assembly, a connecting casing, an expansion casing, a mandrel and a guide cone, wherein the hydraulic cylinder assembly and the expansion casing are fixedly connected together through the connecting casing, the mandrel is arranged in the expansion casing, a bottom piston is arranged in the connecting casing, the bottom end of a piston rod of the hydraulic cylinder assembly abuts against the bottom piston, the upper end of the mandrel is fixedly arranged with the bottom piston, a first pressure spring is sleeved outside the mandrel, a guide groove is arranged in the middle of the mandrel, a limit screw is arranged on the wall of the casing, the inner end of the limit screw is positioned in the guide groove, an expansion body for enabling the expansion casing to expand outwards is arranged outside the mandrel, and the guide cone is fixedly connected to the lower end of the mandrel. The expansion sleeve has a reasonable and compact structure, is convenient to use, drives the mandrel to move downwards through the pressure liquid so as to extrude the expansion sleeve outwards, so that the expansion sleeve can be used for shaping and repairing the oilfield sleeve, and the repair rate is improved.

Description

Hydraulic casing shaper device

Technical Field

The invention relates to the technical field of deformation repair of oil field casings, in particular to a hydraulic casing shaper device.

Background

In the process of oil field exploitation, due to factors such as ground stress, the underground casing pipe can generate complex conditions such as deformation and staggered sections, so that the production well stops production, and the implementation of subsequent measures of the well is influenced. In the explosive shaping technology, the dosage is difficult to control, the sleeve at the deformation part is often accompanied by uneven wall thickness, and the non-directional property of explosion inevitably causes great damage to the sleeve. The problems of casing damage, casing thickness sacrifice, difficulty in restoring the original drift diameter, long construction period, large investment and the like generally exist in the expanding technology of the pyriform device, the casing milling technology, the eccentric roller shaping technology, the rotary shock technology, the ball shaping technology and the like in mechanical shaping. At present, the research on the horizontal well casing repairing process is started in China, and a straight well tool can be applied to a horizontal well by additionally arranging a centering device. When the horizontal well and the highly deviated well are repaired, the tubular columns and tools for centering the horizontal well section and the deflecting section by the centering device are added, and then the traditional repairing and sleeving process is used for repairing and sleeving, so that the shaping effect is improved, but the effect is not ideal due to the friction resistance and the torque influence.

Disclosure of Invention

The invention provides a hydraulic casing shaper device, which overcomes the defects of the prior art and can effectively solve the problems of long construction period and easy damage to a casing in the existing casing shaping.

The technical scheme of the invention is realized by the following measures: a hydraulic casing shaper device comprises a hydraulic cylinder assembly, a connecting sleeve, an expansion sleeve, a mandrel and a guide cone, wherein the hydraulic cylinder assembly is fixedly connected with the expansion sleeve through the connecting sleeve, the mandrel is arranged in the expansion sleeve, the upper portion of the mandrel is positioned in the connecting sleeve, a bottom piston is arranged in the connecting sleeve corresponding to the upper end of the mandrel in a sliding and sealing mode, the bottom end of a piston rod of the hydraulic cylinder assembly abuts against the bottom piston so that a piston rod pushes the bottom piston downwards under the action of liquid pressure, the upper end of the mandrel is fixedly installed together with the bottom piston, a first pressure spring is sleeved on the outer side of the mandrel corresponding to the lower position of the bottom piston, the upper end and the lower end of the first pressure spring abut against the bottom piston and the expansion sleeve respectively, a plurality of guide grooves are formed in the middle of the mandrel, limit screws are arranged on the wall of the expansion sleeve corresponding to each guide groove, the inner ends of the limit screws are positioned in the guide grooves corresponding to the inner ends of the guide grooves, an expansion body is arranged on the outer side of the mandrel corresponding to the lower position of the guide groove, the expansion body comprises a plurality of taper ring bodies which are coaxially arranged on the outer side of the mandrel from top to bottom, a plurality of the expansion sleeve, a plurality of taper ring body is coaxially arranged on the inner wall of each expansion sleeve, and a taper ring body, and a plurality of the expansion sleeve corresponding to the expansion sleeve is uniformly distributed on the taper ring body, and a plurality of the expansion sleeve, the taper ring body is uniformly distributed on the expansion sleeve.

The following is further optimization or/and improvement of the technical scheme of the invention:

the hydraulic cylinder assembly can comprise a plurality of hydraulic cylinder sleeves which are sequentially connected end to end from top to bottom, wherein the lowest hydraulic cylinder sleeve is fixedly connected with a connecting sleeve, a small piston rod is arranged in each hydraulic cylinder sleeve, each small piston rod comprises a head and a rod part fixedly connected to the bottom end of the head, an inner ring platform is arranged on the inner wall of the hydraulic cylinder sleeve corresponding to the rod part, the head and the rod part of each small piston rod are respectively installed in the hydraulic cylinder sleeve and the inner ring platform in a sliding and sealing mode, a second pressure spring is sleeved on the outer side of the rod part corresponding to the position between the head of the small piston rod and the inner ring platform, the bottom end of the rod part of each small piston rod is abutted against the top end of the head of the small piston rod adjacent to the bottom of the small piston rod, the bottom end of the rod part of the lowest small piston rod is abutted against a bottom piston, a hole check ring for positioning the small piston rod is arranged on the inner wall of the hydraulic cylinder sleeve corresponding to the head of the small piston rod, so that the head of the small piston rod is spaced from a certain distance to the adjacent hydraulic cylinder sleeve above the small piston rod, a liquid inlet gap is formed into a liquid inlet gap, a liquid inlet channel is formed in the middle of the small piston rod, and a plurality of through holes for communicating the liquid inlet is formed in the liquid inlet channel.

The middle part of the mandrel can be provided with a central flow passage which is communicated up and down, the bottom piston corresponding to the central flow passage is provided with a communicating hole for communicating the liquid flow passage of the small piston rod with the central flow passage of the mandrel, and the guide cone corresponding to the central flow passage is provided with a discharge hole which is communicated with the central flow passage and is communicated with the inside and the outside.

The upper end of the hydraulic cylinder sleeve at the uppermost part of the hydraulic cylinder assembly can be connected with an upper joint in a threaded manner.

The top surface of the head of each small piston rod can be provided with a positioning groove matched with the rod part, and the lower end of the rod part of each small piston rod is arranged in the positioning groove of the head of the small piston rod adjacent to the lower end of the rod part.

A first sealing ring for sealing a gap between the head of the small piston rod and the inner wall of the hydraulic cylinder sleeve can be arranged between the head of the small piston rod and the inner wall of the hydraulic cylinder sleeve, and a second sealing ring for sealing the gap between the rod of the small piston rod and the inner wall of the inner ring table is arranged between the rod of the small piston rod and the inner wall of the inner ring table.

And a third sealing ring for sealing the gap between the bottom piston and the inner wall of the connecting sleeve can be arranged between the bottom piston and the inner wall of the connecting sleeve.

The invention adopts a hydraulic pipe expansion technology, the mandrel is driven to move downwards by pressure liquid to extrude the expansion sleeve, the diameter of the expansion sleeve is enlarged, pressure potential energy is converted into expansion force of mechanical potential energy to repair the deformed oil field sleeve, and the technical problems of large drilling pressure and torque loss and difficulty in calculating and controlling effective drilling pressure and torque transmitted to the bottom end of a drilling tool by the well mouths of a horizontal well and a highly deviated well are solved by controlling the quantity of the hydraulic cylinder sleeves and the small piston rods.

Drawings

FIG. 1 is a front view semi-sectional structural schematic diagram of the upper half of the preferred embodiment of the present invention.

FIG. 2 is a front view of a half cross-sectional structure of the lower half of the preferred embodiment of the present invention.

The codes in the figures are respectively: the device comprises a connector 1, a connectingsleeve 2, anexpansion sleeve 3, a mandrel 4, abottom piston 5, a first pressure spring 6, a guide groove 7, alimiting screw 8, aconical ring body 9, a dividinggroove 10, aguide cone 11, ahydraulic cylinder sleeve 12, asmall piston rod 13, asecond pressure spring 14, ahole retainer ring 15, aliquid flow channel 16, acentral flow channel 17, adrainage hole 18, apositioning groove 19, a first sealing ring 20, asecond sealing ring 21, athird sealing ring 22, aliquid inlet gap 23 and a throughhole 24.

Detailed Description

The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention.

In the present invention, for convenience of description, the description of the relative positional relationship of the components is described according to the layout pattern of fig. 1 of the specification, such as: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of the drawings of the specification.

The invention is further described with reference to the following examples and figures:

as shown in the attached figures 1 and 2, the hydraulic casing shaper device comprises a hydraulic cylinder assembly, a connectingcasing 2, anexpansion casing 3, a mandrel 4 and aguide cone 11, wherein the hydraulic cylinder assembly and theexpansion casing 3 are fixedly connected together through the connectingcasing 2, the mandrel 4 is arranged in theexpansion casing 3, the upper part of the mandrel 4 is positioned in the connectingcasing 2, abottom piston 5 is arranged in the connectingcasing 2 corresponding to the upper end of the mandrel 4 in a sliding and sealing manner, the bottom end of a piston rod of the hydraulic cylinder assembly abuts against thebottom piston 5 so that the piston rod pushes thebottom piston 5 downwards under the action of liquid pressure, the upper end of the mandrel 4 is fixedly arranged together with thebottom piston 5, a first pressure spring 6 is sleeved outside the mandrel 4 corresponding to the lower position of thebottom piston 5, the upper end and the lower end of the first pressure spring 6 are respectively abutted against thebottom piston 5 and theexpansion sleeve 3, a plurality of guide grooves 7 are arranged in the middle of the mandrel 4, the wall of theexpansion sleeve 3 corresponding to the position of each guide groove 7 is provided with alimit screw 8, the inner end of eachlimit screw 8 is positioned in the corresponding guide groove 7, the outer side of the mandrel 4 corresponding to the position below the guide groove 7 is provided with an expansion body, the expansion body comprises a plurality ofconical ring bodies 9 which are sequentially and coaxially arranged on the outer side of the mandrel 4 from top to bottom, the inner wall of theexpansion sleeve 3 corresponding to the position of eachconical ring body 9 is provided with a conical surface matched with theconical ring body 9, a plurality ofpartition grooves 10 which are through from inside to outside are uniformly distributed in the middle of theexpansion sleeve 3 corresponding to the position of the expansion body along the circumferential direction of the expansion sleeve, and aguide cone 11 is fixedly connected with the lower end of the mandrel 4. According to the requirement, theexpansion casing 3 is made of an elastic material, the guide groove 7 and the dividinggroove 10 are both vertically arranged, when the expansion casing is used, the expansion casing is arranged at the lower end of a drill rod and is lowered to a casing deformation contraction position, pressure liquid is pumped into the expansion casing through ground equipment, the pressure liquid acts on a hydraulic cylinder assembly through the drill rod to enable a piston rod of the hydraulic cylinder assembly to push abottom piston 5 downwards, then thebottom piston 5 presses a mandrel 4 downwards, the middle part of theexpansion casing 3 is extruded outwards through an expansion body on the mandrel 4, the diameter of the middle part of theexpansion casing 3 is expanded, and the deformed and contracted casing is shaped to restore the original size. After the shaping is finished, the ground equipment is closed to stop pressurizing, the mandrel 4 returns to the initial position under the action of the first pressure spring, and theexpansion sleeve 3 is restored to the original state, so that the next shaping is facilitated. The hydraulic pipe expanding technology is adopted, the mandrel 4 is driven by pressure liquid to move downwards to extrude theexpansion casing 3, the diameter of theexpansion casing 3 is enlarged, and the deformed oil field casing is repaired.

The hydraulic casing shaper device can be further optimized or/and improved according to actual needs:

as shown in fig. 1 and 2, the hydraulic cylinder assembly includes a plurality ofhydraulic cylinder sleeves 12 connected end to end in sequence from top to bottom, wherein the lowermosthydraulic cylinder sleeve 12 is fixedly connected to the connectingsleeve 2, asmall piston rod 13 is disposed inside eachhydraulic cylinder sleeve 12, thesmall piston rod 13 includes a head and a rod portion fixedly connected to the bottom end of the head, an inner ring platform is disposed on the inner wall of thehydraulic cylinder sleeve 12 corresponding to the rod portion, the head and the rod portion of thesmall piston rod 13 are slidably and sealingly mounted inside thehydraulic cylinder sleeve 12 and the inner ring platform, asecond pressure spring 14 is sleeved on the outer side of the rod portion corresponding to the position between the head portion and the inner ring platform of thesmall piston rod 13, the bottom end of the rod portion of eachsmall piston rod 13 abuts against the top end of the head portion of thesmall piston rod 13 adjacent therebelow, the bottom end of thesmall piston rod 13 at the lowermost is abutted against thebottom piston 5, ahole check ring 15 for positioning thesmall piston rod 13 is disposed on the inner wall of the rod portion of thehydraulic cylinder sleeve 12 corresponding to the head portion of thesmall piston rod 13, and a liquidinlet gap channel 16 is disposed on the rod portion corresponding to thesmall piston rod 13. When the hydraulic cylinder assembly is used, the number of thehydraulic cylinder sleeves 12 and the number of thesmall piston rods 13 are determined according to needs, pressure liquid enters theliquid inlet gap 23 through theliquid flow channel 16 and the throughhole 24 on eachsmall piston rod 13, then the pressure liquid can act on the head of eachsmall piston rod 13 and pressurize eachsmall piston rod 13 simultaneously, the thrust output by the hydraulic cylinder assembly is the sum of the thrust generated on eachsmall piston rod 13, and finally the thrust of all thesmall piston rods 13 is output onto thebottom piston 5 by the lowestsmall piston rod 13, so that the thrust output by the hydraulic cylinder assembly can be controlled by increasing and decreasing the number of thehydraulic cylinder sleeves 12 and thesmall piston rods 13. Through the arrangement of thehydraulic cylinder sleeves 12 which can be connected with each other and thesmall piston rods 13 which are in contact with each other, the thrust output by the hydraulic cylinder assembly can be controlled by increasing and decreasing the numbers of thehydraulic cylinder sleeves 12 and thesmall piston rods 13, and the technical problems that the drilling pressure and the torque transmitted to the bottom end of a drilling tool at the well mouths of a horizontal well and a highly deviated well are high in loss and difficult to calculate and control the effective drilling pressure and the torque are solved.

As shown in fig. 1 and 2, acentral flow passage 17 penetrating up and down is provided in the middle of the mandrel 4, a communicating hole for communicating theliquid flow passage 16 of thesmall piston rod 13 with thecentral flow passage 17 of the mandrel 4 is provided in thebottom piston 5 corresponding to thecentral flow passage 17, and adrainage hole 18 penetrating inside and outside and communicating with thecentral flow passage 17 is provided in theguide cone 11 corresponding to thecentral flow passage 17. The communicating hole, thecentral flow passage 17 and thedrain hole 18 are arranged to facilitate the discharge of the pressure liquid from the invention, so that the pressure liquid is always maintained within a preset pressure value range, and the pressure build-up is prevented from damaging ground equipment or the internal structure of the invention.

As shown in fig. 1, the upper end of the uppermosthydraulic cylinder sleeve 12 of the hydraulic cylinder assembly is connected with an upper connector 1 through screw threads. The upper joint 1 is arranged, so that the drill rod connector is convenient to connect with a drill rod, and the installation time is shortened.

As shown in fig. 1, the top surface of the head of thesmall piston rod 13 is provided with apositioning groove 19 matched with the rod part, and the lower end of the rod part of eachsmall piston rod 13 is arranged in thepositioning groove 19 of the head of thesmall piston rod 13 adjacent to the lower end thereof. The head of eachsmall piston rod 13 is provided with apositioning groove 19, and the lower end of the rod part of eachsmall piston rod 13 is arranged in thepositioning groove 19 at the head of thesmall piston rod 13 adjacent to the lower part of the rod part, so that thesmall piston rods 13 are conveniently ensured to be positioned on the same axis.

As shown in fig. 1 and 2, a first sealing ring 20 for sealing a gap between the head of thesmall piston rod 13 and the inner wall of thehydraulic cylinder sleeve 12 is arranged, and asecond sealing ring 21 for sealing a gap between the rod of thesmall piston rod 13 and the inner wall of the inner ring table is arranged; athird sealing ring 22 for sealing the gap between thebottom piston 5 and the inner wall of the connectingsleeve 2 is arranged between the bottom piston and the connecting sleeve. The first sealing ring 20, thesecond sealing ring 21 and thethird sealing ring 22 are arranged, so that the overall sealing performance of the invention is ensured.

The above technical features constitute the best embodiment of the present invention, which has strong adaptability and best implementation effect, and unnecessary technical features can be increased or decreased according to actual needs to meet the requirements of different situations.

Claims (10)

1. A hydraulic casing shaper device is characterized by comprising a hydraulic cylinder assembly, a connecting sleeve, an expansion sleeve, a mandrel and a guide cone, wherein the hydraulic cylinder assembly and the expansion sleeve are fixedly connected together through the connecting sleeve, the mandrel is arranged in the expansion sleeve, the upper part of the mandrel is positioned in the connecting sleeve, a bottom piston is arranged in the connecting sleeve corresponding to the upper end of the mandrel in a sliding and sealing mode, the bottom end of a piston rod of the hydraulic cylinder assembly abuts against the bottom piston so that a piston rod pushes the bottom piston downwards under the action of liquid pressure, the upper end of the mandrel is fixedly arranged with the bottom piston, a first pressure spring is sleeved on the outer side of the mandrel corresponding to the position below the bottom piston, the upper end and the lower end of the first pressure spring are respectively abutted against the bottom piston and the expansion sleeve, a plurality of guide grooves are formed in the middle of the mandrel, limit screws are arranged on the walls of the expansion sleeves corresponding to the positions of the guide grooves, the inner end of each limit screw is located in the corresponding guide groove, an expansion body is arranged on the outer side of the mandrel corresponding to the position below the guide grooves, the expansion body comprises a plurality of conical ring bodies which are coaxially arranged on the outer side of the mandrel from top to bottom in sequence, conical surfaces matched with the conical ring bodies are arranged on the inner walls of the expansion sleeves corresponding to the positions of the conical ring bodies, a plurality of partition grooves which are communicated with the inside and the outside are uniformly distributed in the middle of the expansion sleeve corresponding to the position of the expansion body along the circumferential direction of the expansion sleeve, and a guide cone is fixedly connected to the lower end of the mandrel.

2. The hydraulic casing shaper device according to claim 1, wherein the hydraulic cylinder assembly comprises a plurality of hydraulic cylinder sleeves connected end to end in sequence from top to bottom, wherein the lowermost hydraulic cylinder sleeve is fixedly connected to the connecting casing, a small piston rod is disposed inside each corresponding hydraulic cylinder sleeve, the small piston rod comprises a head and a rod fixedly connected to the bottom end of the head, an inner ring table is disposed on the inner wall of the hydraulic cylinder sleeve corresponding to the rod, the head and the rod of the small piston rod are slidably and sealingly mounted inside the hydraulic cylinder sleeve and the inner ring table, a second compression spring is sleeved on the outer side of the rod corresponding to the position between the head of the small piston rod and the inner ring table, the bottom end of the rod of each small piston rod abuts against the top end of the head of the small piston rod adjacent therebelow, the bottom end of the rod of the lowest small piston rod abuts against the bottom piston, a hole retainer ring for positioning the small piston rod is disposed on the inner wall of the hydraulic cylinder sleeve corresponding to the head of the small piston rod, and a liquid inlet gap is formed between the head of the small piston rod and the adjacent hydraulic cylinder sleeve above the small piston rod at a certain distance, a liquid inlet gap is formed in the middle of the small piston rod, and a liquid inlet channel is formed in communication with a plurality of the liquid inlet channel.

3. The hydraulic casing shaper device according to claim 2, wherein a central flow channel is formed in the middle of the mandrel and extends vertically therethrough, a communication hole for communicating the liquid flow channel of the small piston rod with the central flow channel of the mandrel is formed in the bottom piston corresponding to the central flow channel, and a drain hole is formed in the pilot cone corresponding to the central flow channel and extends vertically therethrough and communicates with the central flow channel.

4. The hydraulic casing shaper apparatus according to claims 2 or 3, wherein an upper head is threadedly connected to an uppermost hydraulic casing upper end of said hydraulic cylinder assembly.

5. The hydraulic casing shaper apparatus according to claim 2 or 3, wherein the small piston rods have positioning grooves on the top surface of the head portion for engaging with the rod portion, and the lower end of the rod portion of each small piston rod is fitted into the positioning groove of the head portion of the small piston rod adjacent to the lower end thereof.

6. The hydraulic casing shaper apparatus according to claim 4, wherein said small piston rods have locating grooves on the top of their heads for engaging the rods, the lower end of each small piston rod being received in a locating groove in the head of the small piston rod adjacent therebelow.

7. The hydraulic casing shaper apparatus according to claim 2, 3 or 6, wherein a first sealing ring for sealing a gap between the head of the small piston rod and the inner wall of the hydraulic cylinder casing is provided, and a second sealing ring for sealing a gap between the rod of the small piston rod and the inner wall of the inner ring table is provided.

8. The hydraulic casing shaper apparatus according to claim 4, wherein a first sealing ring for sealing a gap between the head of the small piston rod and the inner wall of the hydraulic cylinder casing is provided, and a second sealing ring for sealing a gap between the rod of the small piston rod and the inner wall of the inner ring table is provided.

9. The hydraulic casing shaper apparatus according to claim 5, wherein a first sealing ring for sealing a gap between the head of the small piston rod and the inner wall of the hydraulic cylinder casing is provided, and a second sealing ring for sealing a gap between the rod of the small piston rod and the inner wall of the inner ring table is provided.

10. The hydraulic casing shaper apparatus according to claim 1, 2, 3, 6, 8, or 9, wherein a third sealing ring is provided between the bottom piston and the inner wall of the connection sleeve for sealing a gap therebetween.

Images