CN113653463A - Sliding sleeve assembly and construction tubular column - Google Patents
Sliding sleeve assembly and construction tubular column Download PDFInfo
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- CN113653463A CN113653463A CN202010399014.0A CN202010399014A CN113653463A CN 113653463 A CN113653463 A CN 113653463A CN 202010399014 A CN202010399014 A CN 202010399014A CN 113653463 A CN113653463 A CN 113653463A
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- 238000010276 construction Methods 0.000 title claims abstract description 36
- 238000007789 sealing Methods 0.000 claims abstract description 88
- 230000006835 compression Effects 0.000 claims description 45
- 238000007906 compression Methods 0.000 claims description 45
- 230000000903 blocking effect Effects 0.000 claims description 10
- 238000005520 cutting process Methods 0.000 abstract description 17
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000000605 extraction Methods 0.000 abstract description 2
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 10
- 239000002253 acid Substances 0.000 description 8
- 238000012856 packing Methods 0.000 description 7
- 210000002445 nipple Anatomy 0.000 description 5
- 230000000712 assembly Effects 0.000 description 4
- 238000000429 assembly Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009466 transformation Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000020477 pH reduction Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/28—Dissolving minerals other than hydrocarbons, e.g. by an alkaline or acid leaching agent
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
The invention relates to the technical field of oil extraction engineering and discloses a sliding sleeve assembly and a construction tubular column. The sliding sleeve subassembly includes ball cutting sliding sleeve and at least one ball sliding sleeve of crossing, and at least one ball sliding sleeve of crossing is coaxial coupling in the place ahead of ball cutting sliding sleeve, wherein: the ball passing sliding sleeve is configured to push the first sealing inner sleeve to move to the rear section of the first outer sleeve through fracturing ball pressure holding so as to open the first flow guide port and release the fracturing ball to the rear ball passing sliding sleeve or the ball cutting sliding sleeve; the ball-cutting sliding sleeve is configured to push the second sealing inner sleeve to move to the rear section of the second outer sleeve through fracturing ball pressure building so as to open the second flow guide port and plug the rear port of the second outer sleeve. The sliding sleeve assembly can open the ball passing sliding sleeve and the ball intercepting sliding sleeve completely through one-time ball throwing, no level difference exists between the sliding sleeves, the construction section number of the construction pipe column can be increased on the premise of not changing the fracture ball range, and therefore the productivity advantage of the oil and gas well is brought into full play.
Description
Technical Field
The invention relates to the technical field of oil extraction engineering, in particular to a sliding sleeve assembly and a construction tubular column comprising the same.
Background
In the process of oil and gas well development, a staged fracturing/acidizing mode is often adopted to realize the yield increase of the oil and gas well. Construction strings used for fracturing/acidizing are typically performed using multi-stage sliding sleeve tools. However, the multistage sliding sleeve used at present can only open one sliding sleeve in each ball throwing process, the difference exists between the sliding sleeves, the multistage sliding sleeve needs to be opened through fracturing balls with different size differences, the fracturing balls cannot be infinitely small or infinitely large due to the limitation of the size of a well completion pipe string, and therefore the number of stages of the sliding sleeve grading is limited, the number of construction stages is limited, and the capacity advantage of an oil-gas well cannot be fully played.
Disclosure of Invention
The invention aims to provide a sliding sleeve assembly and a construction string comprising the same so as to solve the problems.
In order to achieve the above object, the present invention provides a sliding sleeve assembly, which comprises a ball-catching sliding sleeve and at least one ball-passing sliding sleeve, wherein the at least one ball-passing sliding sleeve is coaxially connected in front of the ball-catching sliding sleeve, wherein:
the ball-passing sliding sleeve comprises a first outer sleeve and a first sealing inner sleeve, a first flow guide port is formed in the front section cylinder wall of the first outer sleeve, the first sealing inner sleeve is coaxially connected into the first outer sleeve and seals the first flow guide port, and the ball-passing sliding sleeve is configured to push the first sealing inner sleeve to move to the rear section of the first outer sleeve through the pressure build-up of a fracturing ball so as to open the first flow guide port and release the fracturing ball to the rear part in the ball-passing sliding sleeve or the ball-blocking sliding sleeve;
the ball-cutting sliding sleeve comprises a second outer sleeve and a second sealing inner sleeve, a second flow guide port is formed in the front section cylinder wall of the second outer sleeve, the second sealing inner sleeve is coaxially connected into the second outer sleeve and seals the second flow guide port, and the ball-cutting sliding sleeve is configured to push the second sealing inner sleeve to move to the rear section of the second outer sleeve through the fracturing ball pressure holding so as to open the second flow guide port and block the rear port of the second outer sleeve.
Optionally, the ball passing sliding sleeve includes a compression inner sleeve, the compression inner sleeve is coaxially sleeved in the first outer sleeve and abuts against the front end face of the first sealing inner sleeve, an annular groove adapted to the compression inner sleeve is formed on the inner wall of the first outer sleeve located behind the first flow guide port, the front end of the compression inner sleeve can be in sealing abutment with the fracturing ball to move backwards together with the fracturing ball and the first sealing inner sleeve, and the compression inner sleeve can be restored to a natural state to be embedded in the annular groove when moving to the annular groove, so as to allow the fracturing ball to enter the first sealing inner sleeve.
Optionally, the compression inner sleeve comprises a ring member with an opening and a sealing strip connected with two opening ends of the ring member, and the sealing strip is configured to be capable of being disconnected when the ring member loses the compression force and returns to the natural state.
Optionally, the ball-passing sliding sleeve includes a first joint, the first joint is coaxially inserted into the front end of the first outer sleeve, the inner diameter of the first joint is larger than the outer diameter of the fracturing ball, and a first abutting surface abutting against the front end surface of the compression inner sleeve is arranged in the first joint.
Optionally, the ball blocking sliding sleeve includes a second joint, the second joint is coaxially inserted into the front end of the second outer sleeve, the inner diameter of the second joint is larger than the outer diameter of the fracturing ball, and a second abutting surface abutting against the front end surface of the second sealing inner sleeve is arranged in the second joint.
Optionally, a first stop surface is formed on an inner wall of the rear section of the first outer sleeve, and the first stop surface can abut against a rear end surface of the first inner sealing sleeve to prevent the first inner sealing sleeve from being separated from the first outer sleeve backwards.
Optionally, a second stopping surface is formed on an inner wall of the rear section of the second outer sleeve, and the second stopping surface can be abutted against the rear end surface of the second inner sealing sleeve to prevent the second inner sealing sleeve from being separated from the second outer sleeve backwards.
Optionally, the ball blocking sliding sleeve comprises a blocking structure, and the blocking structure is configured to limit the second sealing inner sleeve to prevent the second sealing inner sleeve from moving relative to the second outer sleeve when the second sealing inner sleeve moves to the rear section of the second outer sleeve.
Optionally, the first inner seal sleeve is connected to the first outer sleeve by a first shear pin, and the second inner seal sleeve is connected to the second outer sleeve by a second shear pin.
The construction pipe column comprises the sliding sleeve assembly.
Through the technical scheme, the sliding sleeve assembly can completely open the ball passing sliding sleeve and the ball intercepting sliding sleeve through one-time ball throwing, no level difference exists between the sliding sleeves, the construction section number of the construction pipe column can be increased on the premise of not changing the fracture ball range, the multi-cluster and multi-level transformation requirements in the oil-gas transformation process are met, and therefore the productivity advantage of an oil-gas well is fully exerted. In addition, the sliding sleeve assembly disclosed by the invention is simple and compact in structure, convenient to assemble and produce, strong in practicability, low in sliding sleeve opening difficulty and reliable in opening mode.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a cross-sectional view of an embodiment of the ball-passing sliding sleeve of the present invention, wherein the first diversion port is in a sealed state;
fig. 2 is a schematic view of the first diversion opening in fig. 1 in an open state;
FIG. 3 is a sectional view of an embodiment of the ball cut sleeve of the present invention wherein the second fluid conducting port is in a sealed state;
fig. 4 is a schematic view of the second diversion opening of fig. 3 in an open state;
FIG. 5 is a schematic view of the compression sleeve of FIG. 1;
FIG. 6 is a schematic view illustrating the inner compression sleeve of FIG. 5 being returned to a natural state;
fig. 7 is a schematic illustration of an acidizing string installed in a horizontal well according to one embodiment of the present invention.
Description of the reference numerals
10-ball-passing sliding sleeve, 11-first outer sleeve, 111-first guide opening, 112-first stop surface, 113-annular groove, 12-first inner sealing sleeve, 13-inner compression sleeve, 131-annular element, 132-sealing strip, 14-first shear pin, 15-first sealing ring, 16-first joint, 161-first abutment surface, 20-ball-cutting sliding sleeve, 21-second outer sleeve, 211-second guide opening, 212-second stop surface, 22-second inner sealing sleeve, 23-detent mechanism, 231-first tooth portion, 232-second tooth portion, 24-second shear pin, 25-second sealing ring, 26-second joint, 261-second abutment surface, 30-fracturing ball, 40-guide shoe, 50-tubular column, 51-pipe string short joint, 60-centralizer.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
In the present invention, unless otherwise specified, the term "front" used herein refers to the left side as viewed in the drawings, and the term "rear" used herein refers to the right side as viewed in the drawings. "inner and outer" refer to the inner and outer contours of the respective component itself.
The invention provides a sliding sleeve assembly, which comprises a ball-cutting sliding sleeve 20 and at least one ball-passing sliding sleeve 10, wherein the at least one ball-passing sliding sleeve 10 is coaxially connected in front of the ball-cutting sliding sleeve 20, wherein:
the ball-passing sliding sleeve 10 comprises a first outer sleeve 11 and a first inner sealing sleeve 12, a first flow guide port 111 is formed in the front section cylinder wall of the first outer sleeve 11, the first inner sealing sleeve 12 is coaxially connected in the first outer sleeve 11 and seals the first flow guide port 111, and the ball-passing sliding sleeve 10 is configured to be capable of pushing the first inner sealing sleeve 12 to move to the rear section of the first outer sleeve 11 through the pressure-holding of the fracturing ball 30 so as to open the first flow guide port 111 and release the fracturing ball 30 to the rear ball-passing sliding sleeve 10 or the ball-blocking sliding sleeve 20;
the ball-blocking sliding sleeve 20 comprises a second outer sleeve 21 and a second inner sealing sleeve 22, a second flow guide port 211 is formed in the front section cylinder wall of the second outer sleeve 21, the second inner sealing sleeve 22 is coaxially connected in the second outer sleeve 21 and seals the second flow guide port 211, and the ball-blocking sliding sleeve 20 is configured to push the second inner sealing sleeve 22 to move to the rear section of the second outer sleeve 21 through the fracturing ball 30 in a pressure-holding manner so as to open the second flow guide port 211 and block the rear port of the second outer sleeve 21.
In the above, it can be understood that the inner diameter of the first inner packing sleeve 12 is larger than the outer diameter of the fracturing ball 30, and the fracturing ball 30 can enter the first inner packing sleeve 12 and move through the first inner packing sleeve 12 and the first outer sleeve 11 into the rear ball passing sleeve 10 or the ball cutting sleeve 20. The inner diameter of the second inner sealing sleeve 22 is smaller than the outer diameter of the fracturing ball 30, and the fracturing ball 30 cannot enter the second inner sealing sleeve 22, so that the second inner sealing sleeve 22 can be pushed to move and the rear port of the second outer sleeve 21 can be plugged.
Through the technical scheme, the sliding sleeve assembly can open the ball passing sliding sleeve 10 and the ball intercepting sliding sleeve 20 completely through one-time ball throwing, no level difference exists between the sliding sleeves, the construction section number of a construction pipe column can be increased on the premise that the range of the fracturing balls 30 is not changed, the multi-cluster and multi-level transformation requirements in the oil-gas transformation process are met, and therefore the productivity advantage of an oil-gas well is fully exerted. In addition, the sliding sleeve assembly disclosed by the invention is simple and compact in structure, convenient to assemble and produce, strong in practicability, low in sliding sleeve opening difficulty and reliable in opening mode.
In the invention, in order to make the fracturing ball 30 push the first inner sealing sleeve 12 to move backwards and enter the first inner sealing sleeve 12 after opening the first diversion port 111, as shown in fig. 1 and 2, the ball-passing sliding sleeve 10 may include a compression inner sleeve 13, the compression inner sleeve 13 is coaxially sleeved in the first outer sleeve 11 and abuts against the front end surface of the first sealing inner sleeve 12 (that is, the compression inner sleeve 13 is arranged in front of the first outer sleeve 11), an annular groove 113 adapted to the compression inner sleeve 13 is formed on the inner wall of the first outer sleeve 11 behind the first flow guide port 111, the front end of the compression inner sleeve 13 can be in sealing abutment with the fracturing ball 30 to move backwards together with the fracturing ball 30 and the first sealing inner sleeve 12, and the compression inner sleeve 13 can be restored to a natural state to be embedded in the annular groove 113 when moving to the annular groove 113, so as to allow the fracturing ball 30 to enter the first sealing inner sleeve 12.
In the above, it can be understood that the outer diameter of the compression inner sleeve 13 is equal to the outer diameter of the first sealing inner sleeve 12, the inner diameter of the compression inner sleeve 13 is smaller than the inner diameter of the first sealing inner sleeve 12, the inner diameter of the compression inner sleeve 13 is smaller than the outer diameter of the fracturing ball 30, and the inner diameter of the compression inner sleeve 13 returning to the natural state is larger than the outer diameter of the fracturing ball 30.
In the present invention, the compression sleeve 13 may have any structure capable of achieving the above-described function. According to an embodiment of the present invention, as shown in fig. 5 and 6, the compression inner sleeve 13 may include a ring member 131 having an opening and a sealing tape 132 connecting both open ends of the ring member 131, the sealing tape 132 being configured to be broken when the ring member 131 loses a compression force and returns to a natural state. Of course, the compression inner sleeve 13 may include only the ring member 131 having an opening, and both open ends of the ring member 131 are butt-sealed in a compressed state.
In the present invention, as shown in fig. 1 and 2, the ball-passing sliding sleeve 10 may further include a first joint 16, the first joint 16 is coaxially inserted into the front end of the first outer sleeve 11, the inner diameter of the first joint 16 is larger than the outer diameter of the fracturing ball 30, and a first abutting surface 161 abutting against the front end surface of the inner compression sleeve 13 is disposed in the first joint 16. The first abutting surface 161 can limit the position of the inner compression sleeve 13 and prevent the inner compression sleeve from moving forward, so that the compression sleeve 13 and the first inner sealing sleeve 12 can be pushed by the fracturing ball 30, and the structural stability of the over-ball sliding sleeve 10 is improved. The specific plugging structure of the first connector 16 and the first outer sleeve 11 can be seen in fig. 1 and 2, wherein the first connector 16 can be screwed with the front end of the first outer sleeve 11. It should be noted that fig. 1 and 2 are only exemplary, and the first joint 16 and the first outer sleeve 11 may be connected by other suitable structures.
In the present invention, as shown in fig. 3 and 4, the sliding ball sleeve 20 may further include a second joint 26, the second joint 26 is coaxially inserted into the front end of the second outer sleeve 21, the inner diameter of the second joint 26 is larger than the outer diameter of the fracturing ball 30, and a second abutting surface 261 abutting against the front end surface of the second inner sealing sleeve 22 is provided in the second joint 26. The second abutting surface 261 can limit the second inner sealing sleeve 22 and prevent the second inner sealing sleeve 22 from moving forward, so that the second inner sealing sleeve 22 is pushed by the fracturing balls 30, and the structural stability of the ball-catching sliding sleeve 20 is improved. The specific plugging structure of the second connector 26 and the second outer sleeve 21 can be seen in fig. 3 and 4, wherein the second connector 26 can be screwed with the front end of the second outer sleeve 21. It should be noted that fig. 3 and 4 are only exemplary, and the second joint 26 and the second outer sleeve 21 may be connected by other suitable structures.
In the present invention, in order to prevent the first inner sealing sleeve 12 from moving backward and separating from the first outer sleeve 11, as shown in fig. 2, a first stop surface 112 may be formed on an inner wall of a rear section of the first outer sleeve 11, and the first stop surface 112 may abut against a rear end surface of the first inner sealing sleeve 12 to prevent the first inner sealing sleeve 12 from separating from the first outer sleeve 11 backward. In addition, in order to prevent the second inner seal sleeve 22 from moving backward and separating from the second outer sleeve 21, as shown in fig. 4, a second stop surface 212 may be formed on an inner wall of a rear section of the second outer sleeve 21, and the second stop surface 212 may abut against a rear end surface of the second inner seal sleeve 22 to prevent the second inner seal sleeve 22 from separating from the second outer sleeve 21 backward.
In the present invention, in order to prevent the second inner sealing sleeve 22 from freely moving after the second diversion port 211 is opened, the ball blocking sliding sleeve 20 may further include a position limiting structure 23, and the position limiting structure 23 is configured to limit the second inner sealing sleeve 22 to prevent the second inner sealing sleeve 22 from moving relative to the second outer sleeve 21 when the second inner sealing sleeve 22 moves to the rear section of the second outer sleeve 21. Wherein, the blocking structure can adopt a structure similar to the matching structure of the compression inner sleeve 13 and the annular groove 113. Of course, the detent structure can also be applied to the ball bushing 10 to limit the movement of the first inner seal sleeve 12 in the ball bushing 10.
In the case of a sliding ball sleeve 20 with a second stop surface 212, the detent structure 23 can be used only to limit the forward movement of the second inner sealing sleeve 22. In this case, the detent structure 23 may be a pair of saw-tooth structures disposed on the outer wall of the second inner seal sleeve 22 and the inner wall of the second outer sleeve 21, so as to achieve the purpose that the second inner seal sleeve 22 can only move backwards and can not move forwards. For example, as shown in fig. 3 and 4, the detent structure 23 includes a first tooth 231 disposed on the inner wall of the second outer sleeve 21 and a second tooth 232 disposed on the outer wall of the second inner seal sleeve 22, and the first tooth 231 and the second tooth 232 extend obliquely in opposite directions, respectively.
In the present invention, as shown in fig. 1, the first inner packing sleeve 12 may be connected to the first outer sleeve 11 by a first shear pin 14. The first inner sealing sleeve 12 can be sleeved with a first sealing ring 15 to form a seal with the inner wall of the first outer sleeve 11 through the first sealing ring 15. The first outer sleeve 11 may have a plurality of first diversion ports 111 formed thereon, and the plurality of first diversion ports 111 may be arranged at intervals along the circumferential direction of the first outer sleeve 11. As shown in fig. 3, the second inner seal sleeve 22 may be connected to the second outer sleeve 21 by a second shear pin 24. The second inner sealing ring 22 can be sleeved with a second sealing ring 25 to form a seal with the inner wall of the second outer sleeve 21 through the second sealing ring 25. A plurality of second flow guiding openings 211 can be formed in the second outer sleeve 21, and the second flow guiding openings 211 can be arranged at intervals along the circumferential direction of the second outer sleeve 21.
In the invention, the ball passing sliding sleeve 10 and the ball passing sliding sleeve 10, and the ball passing sliding sleeve 10 and the ball stopping sliding sleeve 20 can be connected through the pipe nipple 51. Specifically, the rear end of the ball passing sliding sleeve 10 can be connected with the rear pipe nipple 51 through a threaded structure arranged at the rear end of the first outer sleeve 11, and the front end of the ball passing sliding sleeve 10 can be connected with the front pipe nipple 51 through the first joint 16. The rear end of the ball cut-off sliding sleeve 20 can be connected with the rear pipe nipple 51 through a thread structure arranged at the rear end of the second outer sleeve 21, and the front end of the ball cut-off sliding sleeve 20 can be connected with the front pipe nipple 51 through the second joint 26.
When the sliding sleeve assembly is used, the fracturing ball 30 firstly enters the first joint 16 of the ball-passing sliding sleeve 10 positioned at the forefront, and moves backwards under the action of pressure to abut against the front end of the compression inner sleeve 13, because the outer diameter of the fracturing ball 30 is larger than the inner diameter of the compression inner sleeve 13, the fracturing ball 30 cannot pass through, pressure is suppressed at the front end of the compression inner sleeve 13, when the thrust of the fracturing ball 30 is larger than the shearing strength of the first shearing pin 14 for fixing the first sealing inner sleeve 12, the first shearing pin 14 is sheared, the fracturing ball 30 pushes the compression inner sleeve 13 and the first sealing inner sleeve 12 to move backwards, so that the first flow guide opening 111 sealed by the first sealing inner sleeve 12 on the wall of the first outer sleeve 11 is exposed, and a flow channel is established. When the compression inner sleeve 13 is pushed to the annular groove 113 of the first outer sleeve 11 by the fracturing ball 30, the compression inner sleeve 13 loses the compression force applied thereto by the first outer sleeve 11 to return to a natural state and to be inserted into the annular groove 113 to allow the fracturing ball 30 to pass through. Since the inner diameter of the first inner seal sleeve 12 is larger than the outer diameter of the fracturing ball 30, the fracturing ball 30 passes through the first inner seal sleeve 12 under the thrust action, and then enters the rear sliding sleeve through the ball-passing sliding sleeve 10. Due to the design of the first stop surface 112 in the first outer sleeve 11, the first inner packing sleeve 12 is restrained against further rearward movement within the first outer sleeve 11. According to the same principle, the fracturing ball 30 opens the first diversion port 111 of the multiple ball-passing sliding sleeves 10, and smoothly passes through the multiple ball-passing sliding sleeves 10, and finally enters the rear ball-catching sliding sleeve 20.
When the fracturing ball 30 moves into the ball cutting sliding sleeve 20, since the inner diameter of the second inner sealing sleeve 22 of the ball cutting sliding sleeve 20 is smaller than the outer diameter of the fracturing ball 30, the fracturing ball 30 cannot pass through, a pressure building effect is formed at the front end of the second inner sealing sleeve 22, when the thrust of the fracturing ball 30 is greater than the shear strength of the second shear pin 24 for fixing the second inner sealing sleeve 22, the second shear pin 24 is sheared, the fracturing ball 30 pushes the second inner sealing sleeve 22 to move backwards, so that the second flow guide opening 211 sealed by the second inner sealing sleeve 22 on the wall of the second outer sleeve 21 is exposed, and a flow channel is established. Due to the design of the second stop surface 212 in the second outer sleeve 21, the second inner seal sleeve 22 is limited in the second outer sleeve 21 and cannot move backwards any more; meanwhile, since the outer diameter of the fracturing ball 30 is larger than the inner diameter of the second inner sealing sleeve 22, the fracturing ball 30 cannot enter the second inner sealing sleeve 22 and continuously moves backwards, so that the rear port of the second outer sleeve 21 is blocked. In addition, the second inner sealing sleeve 22 cannot move forwards due to the clamping structure arranged in the ball-cutting sliding sleeve 20.
A second aspect of the present invention provides a construction string comprising the above-described sliding sleeve assembly.
Wherein, the construction pipe column can be used for fracturing or acidizing of oil and gas wells. The construction tubular column can include the multiunit sliding sleeve subassembly, the multiunit sliding sleeve subassembly can follow the extending direction of oil gas well and connect gradually the setting. It should be noted that there may be extreme differences between sets of sliding sleeve assemblies in the construction string to accommodate different internal diameters of the various well sections, each set of sliding sleeve assemblies configured with a matching fracturing ball 30. During construction, a plurality of fracturing balls 30 at different stages can be respectively put in, a multi-stage and multi-cluster flow channel is established, and the multi-stage and multi-cluster construction of the well is realized. The fracturing balls 30 are soluble balls, and the whole construction pipe column is smooth after the fracturing balls 30 are dissolved, so that normal production of oil gas is facilitated.
The following description will be given of a specific embodiment of the construction string of the present invention, taking acidizing construction as an example. The construction pipe column is an acidizing pipe column for a horizontal well, the acidizing pipe column comprises a plurality of construction pipe sections which are sequentially connected from front to back, each construction pipe section is provided with a sliding sleeve assembly, each sliding sleeve assembly comprises a ball passing sliding sleeve 10 and a ball blocking sliding sleeve 20, acid liquid flowing channels (comprising a first flow guide opening 111 and a second flow guide opening 211) are respectively arranged in each sliding sleeve assembly, each sliding sleeve assembly is provided with a fracturing ball 30, and the sliding sleeve assemblies can be matched with the fracturing ball 30 to sequentially open the ball passing sliding sleeves 10 and the ball blocking sliding sleeves 20 to form the acid liquid flowing channels and block rear ports of the ball blocking sliding sleeves 20.
Through the technical scheme, the acidizing tubular column is simple and reliable in structure and strong in stability, the number of acid inlet points of the horizontal well can be increased, the problem that the horizontal well is difficult to evenly acidize is solved, efficient and even multi-stage multi-cluster acidizing is carried out on the horizontal well, and the productivity of the horizontal well is improved. In addition, as the fracturing ball 30 blocks the rear port of the ball-cutting sliding sleeve 20, the packing between the adjacent sliding sleeve assemblies can be realized, and therefore, the acidizing string of the invention does not need to use a packer for packing.
In the invention, as shown in fig. 7, the sliding sleeve assembly and the sliding sleeve assembly can be connected through a pipe stub 51. The acidizing string may also include a guide shoe 40, the guide shoe 40 being connected to the rear of the plurality of construction pipe sections. The guide shoe 40 can guide the acidizing tubular column to the well bottom smoothly, and a through hole for the acid liquid to flow out is arranged on the guide shoe 40. Additionally, the acidizing string may also include a string 50 connected in front of the plurality of construction pipe sections and a centralizer 60 disposed between adjacent construction pipe sections.
In the acidizing tubular column, the quantity of sliding sleeve subassembly can be decided according to actual construction demand. Specifically, for example, the open hole completion horizontal well shown in fig. 7 can be constructed by dividing the horizontal well into four sections by using a three-stage sliding sleeve assembly, wherein the section I is acidized by a guide shoe 40, and the sections II, III and IV are acidized by using a three-stage sliding sleeve assembly in a multi-stage and multi-cluster mode. Wherein, the sliding sleeve assembly of the II well section comprises two ball passing sliding sleeves 10 and a ball cutting sliding sleeve 20, the sliding sleeve assembly of the III well section comprises two ball passing sliding sleeves 10 and a ball cutting sliding sleeve 20, and the sliding sleeve assembly of the IV well section comprises a ball passing sliding sleeve 10 and a ball cutting sliding sleeve 20.
The third aspect of the invention provides an acidizing method for a horizontal well, which is implemented by adopting the acidizing tubular column, and comprises the following steps:
s1, installing the acidizing pipe column in the horizontal well;
s2, putting a fracturing ball 30 into the acidizing string, pumping the fracturing ball 30 into the ball passing sliding sleeve 10 of the first construction pipe section, and opening the acid liquid flow channels of the ball passing sliding sleeve 10 and the ball intercepting sliding sleeve 20 in sequence by suppressing pressure through the fracturing ball 30, and limiting the fracturing ball 30 in the ball intercepting sliding sleeve 20 to seal the rear port of the ball intercepting sliding sleeve 20;
s3, introducing acid liquor into the acidizing tubular column, and acidizing a second II well section of the horizontal well corresponding to the first construction pipe section;
and S4, completing the acidification of the III section of the horizontal well and other preceding sections in the same way as the steps S2 and S3.
It should be noted that the above method is applicable to the case that the acidizing string does not include the guide shoe 40, in which case the second ii section is the first section of the horizontal well to be constructed. When the acidizing string comprises the guide shoe 40, the method further comprises introducing acid liquor into the acidizing string before the step S2, and acidizing the I section of the horizontal well through the guide shoe 40. In this case, the first section is a first section of the horizontal well to be constructed. It is understood that the acidizing string is constructed sequentially from back to front of the horizontal well.
Of course, in the present invention, the acidification method may further include, for example, a preparation work performed before the step S1 and a subsequent work performed after the step S4. Since these are conventional process steps and are not improvements of the present invention, they will not be described in detail. In addition, the acidizing method can further comprise the steps of circulating and washing the well by using a well killing fluid (such as a 2% KCL aqueous solution) matched with the formation pressure gradient until the properties of the inlet and outlet aqueous solutions are consistent, and closing the well to wait for acidizing construction before the step S2; acid liquor is configured according to requirements and connected with ground construction equipment to complete pressure test of the high-pressure pipeline so as to meet construction conditions.
In operation, the fracturing ball 30 is dropped into the string 50 from the wellhead, the fracturing ball 30 can move to the sliding sleeve assembly under gravity and fluid thrust (surface pumping), and the power of the fracturing ball 30 in the acidizing string comes from the raised bottom-hole pressure due to the continuous pumping of surface equipment.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (10)
1. A sliding sleeve assembly, characterized in that the sliding sleeve assembly comprises a ball cut sliding sleeve (20) and at least one ball passing sliding sleeve (10), the at least one ball passing sliding sleeve (10) is coaxially connected in front of the ball cut sliding sleeve (20), wherein:
the ball passing sliding sleeve (10) comprises a first outer sleeve (11) and a first sealing inner sleeve (12), a first flow guide port (111) is formed in the front section cylinder wall of the first outer sleeve (11), the first sealing inner sleeve (12) is coaxially connected into the first outer sleeve (11) and seals the first flow guide port (111), and the ball passing sliding sleeve (10) is configured to be capable of pushing the first sealing inner sleeve (12) to move to the rear section of the first outer sleeve (11) through a fracturing ball (30) to open the first flow guide port (111) and release the fracturing ball (30) to the rear part of the ball passing sliding sleeve (10) or the ball blocking sliding sleeve (20);
the ball-blocking sliding sleeve (20) comprises a second outer sleeve (21) and a second inner sealing sleeve (22), a second flow guide port (211) is formed in the front section cylinder wall of the second outer sleeve (21), the second inner sealing sleeve (22) is coaxially connected into the second outer sleeve (21) and seals the second flow guide port (211), and the ball-blocking sliding sleeve (20) is configured to be capable of pushing the second inner sealing sleeve (22) to move to the rear section of the second outer sleeve (21) through the pressure of the fracturing ball (30) so as to open the second flow guide port (211) and block the rear port of the second outer sleeve (21).
2. The sliding sleeve assembly of claim 1, wherein said ball-passing sliding sleeve (10) comprises a compression inner sleeve (13), the compression inner sleeve (13) is coaxially sleeved in the first outer sleeve (11) and is abutted against the front end surface of the first sealing inner sleeve (12), an annular groove (113) matched with the compression inner sleeve (13) is formed on the inner wall of the first outer sleeve (11) behind the first diversion port (111), the front end of the compression inner sleeve (13) can be in sealing contact with the fracturing ball (30) to move backwards together with the fracturing ball (30) and the first sealing inner sleeve (12), and the inner compression sleeve (13) can return to a natural state and be embedded in the annular groove (113) when moving to the annular groove (113), to allow the fracturing balls (30) to enter into the first inner seal sleeve (12).
3. The sliding sleeve assembly according to claim 2, wherein the compression inner sleeve (13) comprises a ring member (131) having an opening and a sealing band (132) connecting both open ends of the ring member (131), the sealing band (132) being configured to be broken when the ring member (131) loses a compression force and returns to a natural state.
4. The sliding sleeve assembly according to claim 2, wherein the ball-passing sliding sleeve (10) comprises a first joint (16), the first joint (16) is coaxially inserted into the front end of the first outer sleeve (11), the inner diameter of the first joint (16) is larger than the outer diameter of the fracturing ball (30), and a first abutting surface (161) abutting against the front end surface of the compression inner sleeve (13) is arranged in the first joint (16).
5. The sliding sleeve assembly according to claim 1, wherein the ball cut sliding sleeve (20) comprises a second joint (26), the second joint (26) is coaxially inserted into the front end of the second outer sleeve (21), the inner diameter of the second joint (26) is larger than the outer diameter of the fracturing ball (30), and a second abutting surface (261) abutting against the front end surface of the second inner sealing sleeve (22) is arranged in the second joint (26).
6. The sliding sleeve assembly according to any one of claims 1-5, wherein a first stop surface (112) is formed on an inner wall of a rear section of the first outer sleeve (11), and the first stop surface (112) can abut against a rear end surface of the first inner seal sleeve (12) to prevent the first inner seal sleeve (12) from being separated from the first outer sleeve (11) backwards.
7. The sliding sleeve assembly according to any one of claims 1 to 5, wherein a second stop surface (212) is formed on an inner wall of a rear section of the second outer sleeve (21), and the second stop surface (212) can abut against a rear end surface of the second inner seal sleeve (22) to prevent the second inner seal sleeve (22) from being separated from the second outer sleeve (21) backwards.
8. The sliding sleeve assembly of any one of claims 1-5 wherein said ball cut sliding sleeve (20) includes a detent structure configured to limit movement of said second inner seal sleeve (22) relative to said second outer sleeve (21) when said second inner seal sleeve (22) moves to a rear section of said second outer sleeve (21).
9. The sliding sleeve assembly of any of claims 1-5 wherein said first inner seal sleeve (12) is connected to said first outer sleeve (11) by a first shear pin (14) and said second inner seal sleeve (22) is connected to said second outer sleeve (21) by a second shear pin (24).
10. A construction string, comprising the sliding sleeve assembly of any one of claims 1-9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010399014.0A CN113653463B (en) | 2020-05-12 | 2020-05-12 | Sliding sleeve assembly and construction tubular column |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010399014.0A CN113653463B (en) | 2020-05-12 | 2020-05-12 | Sliding sleeve assembly and construction tubular column |
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| CN113653463B CN113653463B (en) | 2023-09-29 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102979495A (en) * | 2012-12-28 | 2013-03-20 | 中国石油集团渤海钻探工程有限公司 | Multi-cluster current limiting fracturing string of open hole horizontal well and fracturing method thereof |
| CN103015955A (en) * | 2012-12-28 | 2013-04-03 | 中国石油集团渤海钻探工程有限公司 | Open-hole horizontal well multi-cluster sliding sleeve staged fracturing string and fracturing method thereof |
| CN202946129U (en) * | 2012-12-06 | 2013-05-22 | 中国石油集团西部钻探工程有限公司 | High-stability pressure-differential type sliding bushing |
| CN203403872U (en) * | 2013-07-19 | 2014-01-22 | 中国石油集团长城钻探工程有限公司 | Multistage fracturing well completion sliding sleeve device |
| US20140318816A1 (en) * | 2013-03-15 | 2014-10-30 | Peak Completion Technologies, Inc. | Downhole Tools With Ball Trap |
| CN204200202U (en) * | 2014-10-28 | 2015-03-11 | 北京九尊能源技术股份有限公司 | A kind of Limited entry fracturing sliding sleeve |
| CN108756844A (en) * | 2018-06-06 | 2018-11-06 | 中国石油大学(华东) | The switchable staged fracturing sliding sleeve of the more clusters of one ball |
-
2020
- 2020-05-12 CN CN202010399014.0A patent/CN113653463B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202946129U (en) * | 2012-12-06 | 2013-05-22 | 中国石油集团西部钻探工程有限公司 | High-stability pressure-differential type sliding bushing |
| CN102979495A (en) * | 2012-12-28 | 2013-03-20 | 中国石油集团渤海钻探工程有限公司 | Multi-cluster current limiting fracturing string of open hole horizontal well and fracturing method thereof |
| CN103015955A (en) * | 2012-12-28 | 2013-04-03 | 中国石油集团渤海钻探工程有限公司 | Open-hole horizontal well multi-cluster sliding sleeve staged fracturing string and fracturing method thereof |
| US20140318816A1 (en) * | 2013-03-15 | 2014-10-30 | Peak Completion Technologies, Inc. | Downhole Tools With Ball Trap |
| CN203403872U (en) * | 2013-07-19 | 2014-01-22 | 中国石油集团长城钻探工程有限公司 | Multistage fracturing well completion sliding sleeve device |
| CN204200202U (en) * | 2014-10-28 | 2015-03-11 | 北京九尊能源技术股份有限公司 | A kind of Limited entry fracturing sliding sleeve |
| CN108756844A (en) * | 2018-06-06 | 2018-11-06 | 中国石油大学(华东) | The switchable staged fracturing sliding sleeve of the more clusters of one ball |
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| CN113653463B (en) | 2023-09-29 |
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