CN109488240B - Multistage hydraulic pressure seat seals bridge plug instrument - Google Patents
Multistage hydraulic pressure seat seals bridge plug instrument Download PDFInfo
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- CN109488240B CN109488240B CN201811445125.XA CN201811445125A CN109488240B CN 109488240 B CN109488240 B CN 109488240B CN 201811445125 A CN201811445125 A CN 201811445125A CN 109488240 B CN109488240 B CN 109488240B
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- bridge plug
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- piston rod
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- 238000007789 sealing Methods 0.000 claims abstract description 23
- 230000005540 biological transmission Effects 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 6
- 239000003208 petroleum Substances 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 8
- 238000011084 recovery Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000003721 gunpowder Substances 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Classifications
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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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/04—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells operated by fluid means, e.g. actuated by explosion
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a multistage hydraulic setting bridge plug tool, and belongs to the technical field of closed stratums for petroleum wells. The hydraulic device comprises an upper joint, a hydraulic device, a ball seat, a seat sealing ball and a seat sealing sleeve, wherein the lower end of the seat sealing sleeve is connected with a bridge plug. The multistage hydraulic setting bridge plug tool comprises at least two hydraulic cylinders which are sequentially connected from top to bottom; a pressure transmission hole A is formed in the outer wall of the first hydraulic cylinder, and a first piston rod is arranged in the first hydraulic cylinder; a pressure transmission hole B is formed in the outer wall of the second hydraulic cylinder, and a second piston rod is arranged in the second hydraulic cylinder; the bottom end of the second hydraulic cylinder is fixedly connected with the ball seat close to the inner side part, and the lower end of the ball seat is connected with the release seat; the top end of the seat sealing sleeve is connected with the tail end of the second piston rod, and the tail end of the seat sealing sleeve is connected with the bridge plug; the release seat and the bridge plug are connected by at least one shear pin. The invention has the advantages of ensuring the success rate of the setting operation, improving the construction quality and the working condition adaptability of the whole setting tool, having the releasing function and reducing the accident risk.
Description
Technical Field
The invention belongs to the technical field of closed stratums for petroleum wells, and particularly relates to a multistage hydraulic setting bridge plug tool.
Background
Because of the heterogeneity of oil reservoirs storing oil and the difference of physical and chemical properties of crude oil, a measure of stratified oil recovery is needed in the oil recovery process to maximize the ultimate recovery ratio. To achieve stratified oil recovery, a suitable sealing system must be employed. The bridge plug is an underground seat sealing system for an oil field, has a reliable bidirectional pressure-bearing function, can perform temporary, permanent and selective plugging operation on an oil-gas layer, and has a wide application range in oil-gas field development.
In the prior art, the bridge plug setting mode mainly comprises a cable setting mode and a hydraulic setting mode. The cable seat seal needs to use a cable to ignite gunpowder in a combustion seat seal tool, and a bridge plug is seated and released by the impact force generated by the burning of the gunpowder. The cable seat sealing mode relates to gunpowder, and to the unit that does not have the firer qualification, the construction organization degree of difficulty is great and construction cost is higher, therefore, hydraulic pressure seat seal suitability is wider.
The hydraulic setting needs to use an oil pipe or a coiled tubing to send a setting tool and a bridge plug into a well, and then a ball is put into the oil pipe and pressed to set the bridge plug and release the bridge plug. However, the conventional mechanical hydraulic setting tool is large in structure and provided with a centering mechanism, so that the tool is large in abrasion to a casing, rotary operation is carried out during use, the tool needs to be repeatedly lifted and lowered, and the tool also needs to be rotated when being released, so that the function cannot be effectively guaranteed during use, and the tool is not suitable for being used in highly deviated wells and horizontal wells. Moreover, the pressure required when the hydraulic setting bridge plug is set is large, the setting tool cannot meet the requirements perfectly, and the construction quality is poor.
Disclosure of Invention
Technical problem to be solved
In order to solve the problems, the invention provides a multistage hydraulic setting bridge plug tool, and aims to provide a multifunctional setting tool, realize simultaneous setting and releasing, optimize the setting pressure performance of the setting tool and improve the construction quality of the whole bridge plug setting tool.
(II) technical scheme
In order to achieve the purpose, the invention adopts the following technical scheme:
a multistage hydraulic setting bridge plug tool comprises an upper joint, a hydraulic device, a ball seat, a setting ball and a setting sleeve, wherein the upper joint is connected with an upper pipe string, the inner diameter of the ball seat is gradually reduced so as to be matched with the setting ball, and the lower end of the setting sleeve is connected with a bridge plug.
The multistage hydraulic setting bridge plug tool comprises at least two hydraulic cylinders which are sequentially connected from top to bottom, the inner walls of the hydraulic cylinders form a central tube, the hydraulic cylinder at the uppermost side is a first hydraulic cylinder, and the lower side of the first hydraulic cylinder is connected with a second hydraulic cylinder; the outer wall of the first hydraulic cylinder is provided with a pressure transmission hole A, a first piston rod is arranged in the first hydraulic cylinder, and the tail end of the first piston rod is fixedly connected to the top end of the second hydraulic cylinder; and a pressure transmission hole B is formed in the outer wall of the second hydraulic cylinder, and a second piston rod is arranged in the second hydraulic cylinder.
The bottom end of the second hydraulic cylinder is fixedly connected with the ball seat close to the inner side part, and the lower end of the ball seat is connected with the release seat; the top end of the seat sealing sleeve is connected to the tail end of the second piston rod, and the tail end of the seat sealing sleeve is connected with the bridge plug.
The release seat and the bridge plug are connected by at least one shear pin.
Further, the upper joint is in threaded connection with the first hydraulic cylinder.
Furthermore, the joint of the first piston rod and the second hydraulic cylinder and the joint of the second piston rod and the seat envelope are both provided with adjusting rings.
Furthermore, the top end of the seat envelope is provided with an annular boss A, and the annular boss A is fixedly connected with the tail end of the second piston rod.
Furthermore, the tail end of the seat envelope is provided with an annular boss B, the top end of the bridge plug is provided with an annular boss C, and the annular boss B is fixedly connected with the annular boss C in a buckling mode.
Further, a cavity is formed inside the first piston rod and the second piston rod.
Further, the number of the shear pins is two.
(III) advantageous effects
Compared with the prior art, the invention has the beneficial effects that:
1. the invention can complete the setting and releasing operation at the same time, does not need to rotate, effectively prevents the loosening, reduces the accident risk, improves the working condition adaptability of the setting tool and is convenient for popularization.
2. The invention adopts a multi-stage hydraulic cylinder structure, can ensure the success rate of the setting operation and improve the construction quality of the whole setting tool; and the connection relation is simple, the operation is convenient, and the disassembly and the assembly are easy.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the seated state of the present invention;
description of reference numerals: 1-upper joint; 2-a first hydraulic cylinder; 21-pressure transmission hole A; 22-a first piston rod; 3-a second hydraulic cylinder; 31-pressure transfer hole B; 32-a second piston rod; 4-a ball seat; 5-seat sealing the ball; 6-seat envelope; 7-a bridge plug; 8-a release seat; 9-shear pin.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "parallel," "perpendicular," and the like do not require that the components be absolutely parallel or perpendicular, but may be slightly inclined. For example, "parallel" merely means that the directions are more parallel relative to "perpendicular," and does not mean that the structures are necessarily perfectly parallel, but may be slightly tilted.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 and 2, the invention provides a preferred embodiment of a multi-stage hydraulic setting bridge plug tool.
A multistage hydraulic setting bridge plug tool comprises an upper connector 1, a hydraulic device, a ball seat 4, a setting ball 5 and a setting sleeve 6, wherein the upper connector 1 is connected with an upper pipe string, the inner diameter of the ball seat 4 is gradually reduced so as to be matched with the setting ball 5, and the lower end of the setting sleeve 6 is connected with a bridge plug 7. It should be noted that the seat ball 5 and the ball seat 4 need to be in close and seamless fit, so that the seat bridge plug tool can be pressed.
Multistage hydraulic pressure seat seals bridge plug instrument includes from the top down two at least pneumatic cylinders that connect gradually, and the inner wall of pneumatic cylinder constitutes the center tube, and the pneumatic cylinder of the top is first pneumatic cylinder 2, and second pneumatic cylinder 3 is connected to 2 downside of first pneumatic cylinder. It should be noted that, referring to fig. 1 and 2, the present invention is preferably two hydraulic cylinders, but it is not intended that the scope of the present invention is limited to two hydraulic cylinders, and more than two hydraulic cylinders connected in series are within the scope of the present invention. Of course, the number of hydraulic cylinders is such as to provide a sufficient amount of setting pressure, while more hydraulic cylinders are capable of providing a greater setting pressure, requiring field adjustments depending on the work well conditions.
Specifically, a pressure transmission hole a21 is formed in the outer wall of the first hydraulic cylinder 2, a first piston rod 22 is arranged inside the first hydraulic cylinder 2, and the tail end of the first piston rod 22 is fixedly connected to the top end of the second hydraulic cylinder 3; and a pressure transmission hole B31 is formed in the outer wall of the second hydraulic cylinder 3, and a second piston rod 32 is arranged in the second hydraulic cylinder 3.
The bottom end of the second hydraulic cylinder 3 close to the inner side part is fixedly connected with the ball seat 4, and the lower end of the ball seat 4 is connected with a release seat 8; the top end of the seat envelope 6 is connected to the tail end of the second piston rod 32, and the tail end of the seat envelope 6 is connected with the bridge plug 7.
The release seat 8 and said bridge plug 7 are connected by at least one shear pin 9. When the seat sealing is finished and the pressure is held to a certain value, the shear pin 9 is cut off, and the releasing can be realized.
Referring to fig. 1 and 2, in the present embodiment, the upper joint 1 is further improved to be screwed with the first hydraulic cylinder 2, so that the connection relationship is more stable.
In this embodiment, further modified, the joint between the first piston rod 22 and the second hydraulic cylinder 3 and the joint between the second piston rod 32 and the seat cover 6 are provided with adjusting rings. The adjusting ring is beneficial to stabilizing the piston operation of the hydraulic cylinder.
Referring to fig. 1 and 2, in this embodiment, in a further improvement, an annular boss a is disposed at the top end of the seat cover 6, and the annular boss a is fixedly connected to the tail end of the second piston rod 32. With this arrangement, the second piston rod 32 has a higher force transmission efficiency.
Referring to fig. 1 and 2, in this embodiment, in a further improvement, an annular boss B is disposed at the tail end of the seat envelope 6, an annular boss C is disposed at the top end of the bridge plug 7, and the annular boss B and the annular boss C are fixedly connected in a fastening manner. So arranged, it also facilitates the transmission of forces and makes the connection between the seat envelope 6 and the bridge packing 7 more stable.
Referring to fig. 1 and 2, in the present embodiment, a cavity is formed inside the first piston rod 22 and the second piston rod 32. The cavity reduces the overall weight of the first piston rod 22 and the second piston rod 32, which is beneficial to the transmission of hydraulic force, and meanwhile, the weight of the whole multistage hydraulic setting bridge plug tool is reduced, and the cost is reduced.
Referring to fig. 1 and 2, in the present embodiment, preferably, two shear pins 9 are provided. Of course, other numbers of shear pins 9 may be selected, adapted to the multi-stage hydraulic forces.
The application method of the present invention is explained by taking the preferred mode in the above embodiments as an example, referring to fig. 1 and fig. 2.
Before the tool is set, the pipe scraping and the well dredging are carried out firstly, so that the tool is ensured to be smoothly set; screwing the upper joint 1 and the coiled tubing, and checking to prevent the tool from falling off in the well entering process; before the tool is set, the pressure of a wellhead is released to 0MPa through a blowout pipeline, and the releasing pressure is ensured to be within a proper pressure range.
The hydraulic setting tool is lowered and the bridge plug is set strictly according to the design requirements, and attention is paid to the following steps: (1) when the well is lowered, the lowering speed is strictly controlled, when the well passes through a well section with large inclination and large dog-leg degree, the well slowly passes through the well section, so that the resistance is prevented, and the tonnage of the resistance is controlled within 3 t; (2) after the seat sealing tool is put down in place, closing the plug cock of the coiled tubing, releasing pressure, opening the plug cock and putting the seat sealing ball 5 under the condition that the plug cock is completely closed; (3) calculating the internal volume of the coiled tubing, pumping the seat sealing ball 5 to the position according to the design process, and pressing the seat sealing bridge plug 7 in a stepped manner; (4) when the seat seal is pressed, the internal and external pressure difference is strictly controlled within 25 MPa; (5) and after setting and releasing, pulling out the well entering tool and the setting tool, checking the appearance and the starting condition of the setting tool, and determining that the tool is intact without abnormality.
Referring to fig. 1 and 2, the specific operation process of the invention is as follows, a seat sealing ball 5 is put into a seat 4, fluid is conveyed through surface equipment, and pressure is built up in a central tube of a seat tool; the fluid enters the first hydraulic cylinder 2 through the pressure transmission hole A21, the first piston rod 22 is pushed, and the first piston rod 22 pushes the second hydraulic cylinder 3; the fluid enters the second hydraulic cylinder 3 through the pressure transfer hole B31 to push the second piston rod 32, the second piston rod 32 pushes the seat sealing sleeve 6, and the seat sealing sleeve 6 pushes the bridge plug 7 to realize seat sealing; the bridge plug 7 moves downwards to generate displacement difference with the release seat 8, and the shear pin 9 is cut off, so that releasing is realized.
Claims (6)
1. A multistage hydraulic setting bridge plug tool comprises an upper joint (1), a hydraulic device, a ball seat (4), a setting ball (5) and a setting sleeve (6), wherein the upper joint (1) is connected with an upper pipe string, the inner diameter of the ball seat (4) is gradually reduced so as to be matched with the setting ball (5), and the lower end of the setting sleeve (6) is connected with a bridge plug (7); the method is characterized in that: the multistage hydraulic setting bridge plug tool comprises at least two hydraulic cylinders which are sequentially connected from top to bottom, the inner walls of the hydraulic cylinders form a central tube, the hydraulic cylinder at the uppermost side is a first hydraulic cylinder (2), and the lower side of the first hydraulic cylinder (2) is connected with a second hydraulic cylinder (3); a pressure transmission hole A (21) is formed in the outer wall of the first hydraulic cylinder (2), a first piston rod (22) is arranged inside the first hydraulic cylinder (2), and the tail end of the first piston rod (22) is fixedly connected to the top end of the second hydraulic cylinder (3); a pressure transmission hole B (31) is formed in the outer wall of the second hydraulic cylinder (3), and a second piston rod (32) is arranged in the second hydraulic cylinder (3); the bottom end of the second hydraulic cylinder (3) close to the inner side part is fixedly connected with the ball seat (4), and the lower end of the ball seat (4) is connected with the release seat (8); the top end of the seat sealing sleeve (6) is connected to the tail end of the second piston rod (32), and the tail end of the seat sealing sleeve (6) is connected with the bridge plug (7); the release seat (8) and the bridge plug (7) are connected through at least one shear pin (9);
wherein, the joint of the first piston rod (22) and the second hydraulic cylinder (3) and the joint of the second piston rod (32) and the seat seal sleeve (6) are both provided with adjusting rings.
2. The multi-stage hydraulic setting bridge plug tool of claim 1, wherein: the upper joint (1) is in threaded connection with the first hydraulic cylinder (2).
3. The multi-stage hydraulic setting bridge plug tool of claim 1, wherein: the top end of the seat envelope (6) is provided with an annular boss A, and the annular boss A is fixedly connected with the tail end of the second piston rod (32).
4. The multi-stage hydraulic setting bridge plug tool of claim 1, wherein: the tail end of the seat sealing sleeve (6) is provided with an annular boss B, the top end of the bridge plug (7) is provided with an annular boss C, and the annular boss B is fixedly connected with the annular boss C in a buckling mode.
5. The multi-stage hydraulic setting bridge plug tool of claim 1, wherein: the first piston rod (22) and the second piston rod (32) are internally provided with cavities.
6. The multi-stage hydraulic setting bridge plug tool of claim 1, wherein: the number of the shear pins (9) is two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811445125.XA CN109488240B (en) | 2018-11-29 | 2018-11-29 | Multistage hydraulic pressure seat seals bridge plug instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811445125.XA CN109488240B (en) | 2018-11-29 | 2018-11-29 | Multistage hydraulic pressure seat seals bridge plug instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109488240A CN109488240A (en) | 2019-03-19 |
| CN109488240B true CN109488240B (en) | 2021-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811445125.XA Active CN109488240B (en) | 2018-11-29 | 2018-11-29 | Multistage hydraulic pressure seat seals bridge plug instrument |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201924870U (en) * | 2010-11-08 | 2011-08-10 | 西安鼎和新型能源有限公司 | Hydraulic setting tool |
| CN203584365U (en) * | 2013-08-13 | 2014-05-07 | 江苏汇浩石油装备有限公司 | Retrievable integral ash squeezing bridge plug |
| WO2015179100A1 (en) * | 2014-05-21 | 2015-11-26 | Schlumberger Canada Limited | Pressure balanced setting tool |
| CN204492743U (en) * | 2015-03-17 | 2015-07-22 | 山东博赛特石油技术有限公司 | Withstand voltage high temperature resistant pair of packing-element releasing packer |
| CN206053901U (en) * | 2016-09-06 | 2017-03-29 | 中国石油化工股份有限公司 | Bi-directional compression hydraulic setting is without anchoring packer |
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- 2018-11-29 CN CN201811445125.XA patent/CN109488240B/en active Active
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