CN118008202A - Hydraulic control switch device matched with top sealing and setting tool and assembling method thereof - Google Patents
Hydraulic control switch device matched with top sealing and setting tool and assembling method thereof Download PDFInfo
- Publication number
- CN118008202A CN118008202A CN202410173266.XA CN202410173266A CN118008202A CN 118008202 A CN118008202 A CN 118008202A CN 202410173266 A CN202410173266 A CN 202410173266A CN 118008202 A CN118008202 A CN 118008202A
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- Prior art keywords
- pressure difference
- outer cylinder
- hydraulic control
- control switch
- sliding
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- 238000007789 sealing Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 8
- 239000007788 liquid Substances 0.000 claims description 22
- 238000007599 discharging Methods 0.000 claims description 5
- 230000007547 defect Effects 0.000 abstract description 4
- 239000004576 sand Substances 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000000087 stabilizing effect Effects 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- E21B34/08—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained
Landscapes
- 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)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention relates to a hydraulic control switch device matched with a top sealing and setting tool and an assembly method thereof, wherein the device comprises the following components: the first end of the upper joint is connected with the tail end of the setting tool; the first end of the connecting cylinder is detachably connected with the second end of the upper joint; the pressure difference outer cylinder is detachably connected with the second end of the connecting cylinder, the pressure difference outer cylinder is sleeved outside the sliding core shaft, an elastic piece is arranged between the pressure difference outer cylinder and the sliding core shaft, the second end of the pressure difference outer cylinder is provided with an elastic piece lower limit step, and an elastic piece upper limit step is arranged at a position close to the first end of the sliding core shaft; the lower connector is sleeved outside the lower sliding sleeve, and the lower connector is detachably connected with the pressure difference outer cylinder. The invention uses a hydraulic control switch to conduct pressure, thereby avoiding the defect of traditional ball throwing setting.
Description
Technical Field
The invention relates to a hydraulic control switch device matched with a top sealing and setting tool and an assembly method thereof, belonging to the technical field of petroleum and natural gas exploitation.
Background
Along with the increasingly wide application of sand control tools of oil and gas wells, the types of setting tools of the packer at the top of the sand control tubular column are also derived into various forms, including single-release setting tools, double-release setting tools and the like, most of internal pressure stabilizing forms are ball throwing modes, namely, steel balls are thrown into a wellhead, the steel balls are impacted by liquid flow and are seated on ball seats, metal contact sealing is achieved between the two materials, and at the moment, the wellhead is continuously pressed to enable the inside of the setting tools to be boosted and stabilized, and the packer at the top is seated. In this state, it is required that impurities cannot be accumulated in the drift diameter of the tubular column, and the requirements on the dimensional precision and the surface quality of the ball body and the ball seat are high, so that the tool cost is high.
Disclosure of Invention
Aiming at the technical problems, the invention provides the hydraulic control switch device matched with the top sealing and setting tool and the assembly method thereof, the device not only can replace ball throwing and pressure stabilizing, but also can automatically open a flow channel to a preset position under the action of fluid when sand prevention operation needs forward circulation, reverse circulation or seal checking, has simple structure and lower cost, and overcomes the defects of the traditional ball throwing and ball seat structure.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
A hydraulically controlled switching device for cooperation with a top seal setting tool, comprising:
The first end of the upper joint is connected with the tail end of the setting tool;
The first end of the connecting cylinder is detachably connected with the second end of the upper joint;
the pressure difference outer cylinder is detachably connected with the second end of the connecting cylinder, the pressure difference outer cylinder is sleeved outside the sliding core shaft, an elastic piece is arranged between the pressure difference outer cylinder and the sliding core shaft, the second end of the pressure difference outer cylinder is provided with an elastic piece lower limit step, and an elastic piece upper limit step is arranged at a position close to the first end of the sliding core shaft;
The lower connector is sleeved outside the lower sliding sleeve, and the lower connector is detachably connected with the pressure difference outer cylinder.
The hydraulic control switch device is characterized in that the upper joint is preferably of a hollow cylindrical structure, the inner wall surface of the upper joint is composed of a threaded surface and a sealing surface, the threaded surface is used for being connected with the tail end of a setting tool, and a plurality of threaded holes are uniformly distributed in the circumferential direction of the second end of the upper joint.
The hydraulic control switch device is characterized in that the connecting cylinder is of a hollow cylindrical structure, threads are arranged at two ends of the connecting cylinder, and a plurality of threaded holes are uniformly distributed in the circumferential direction of the first end of the connecting cylinder.
The hydraulic control switch device is characterized in that the sliding mandrel is of a hollow cylindrical structure, a sealing surface and a threaded hole are formed in the first end of the sliding mandrel, a circulating hole is formed in the second end of the sliding mandrel, and the threaded hole of the second end of the upper joint, the threaded hole of the first end of the connecting cylinder and the threaded hole of the first end of the sliding mandrel are connected together through an upper starting pin.
The hydraulic control switch device is preferably in sealing connection with the sealing surface of the upper joint through an upper sealing piece.
The hydraulic control switch device is characterized in that the differential pressure outer cylinder is of a hollow cylindrical structure, threads are arranged at the first end and the second end, a plurality of liquid discharging holes are formed in two sides, and a liquid outlet hole is formed in the middle of the differential pressure outer cylinder.
The hydraulic control switch device is characterized in that the lower sliding sleeve is of a hollow cylindrical structure, a plurality of threaded holes are uniformly distributed in the circumferential direction of the second end, and the outer wall surface of the first end is a sealing surface.
The hydraulic control switch device is characterized in that the lower connector is of a round hollow columnar structure, the second end is blind, a plurality of threaded holes are uniformly distributed in the circumferential direction of the first end of the lower connector, and the threaded holes at the second end of the lower sliding sleeve are connected with the threaded holes at the first end of the lower connector through lower starting pins.
In the hydraulic control switch device, preferably, the sealing surface of the lower sliding sleeve is in sealing connection with the second end limiting position of the pressure difference outer cylinder through a lower sealing piece.
The second aspect of the present invention provides an assembly method of the above hydraulic control switch device, including the following steps:
The upper joint is connected with the tail end of the setting tool through threads, the connecting cylinder is firstly arranged on the sliding mandrel, the upper sealing element is arranged on the sealing surface of the sliding mandrel, the upper joint, the connecting cylinder and the threaded holes of the sliding mandrel are aligned, the upper starting pin is arranged in the threaded holes, the elastic element is sleeved on the sliding mandrel, the elastic element is propped against the upper limit step of the elastic element, and the pressure difference outer cylinder is connected with the connecting cylinder through threads;
and installing the lower sealing piece at the second end limit position of the pressure difference outer cylinder, connecting the lower sliding sleeve with the lower joint by utilizing the lower starting pin, and then connecting the lower joint to the pressure difference outer cylinder through threads.
Due to the adoption of the technical scheme, the invention has the following advantages:
1. the invention uses a hydraulic control switch to conduct pressure, thereby avoiding the defect of traditional ball throwing setting.
2. The invention has simple structure, avoids the processing of the setting ball and the ball seat with higher dimensional accuracy and surface quality, and saves the cost.
3. The invention uses the hydraulic pressure difference to control the opening and closing of the liquid outlet hole, and simplifies the structure of the setting tool.
4. The invention can be matched with a setting tool to realize the whole functions of setting, checking and releasing hands and the like.
Drawings
FIG. 1 is a schematic diagram of a hydraulic control switch device according to an embodiment of the present invention;
fig. 2 is a half cross-sectional view of a hydraulic control switch device according to the embodiment of the present invention;
FIG. 3 is an exploded view of a hydraulic control switching device according to the embodiment of the present invention;
FIG. 4 is a cross-sectional view of a differential pressure outer cylinder in a hydraulic control switch device according to the embodiment of the present invention;
FIG. 5 is a cross-sectional view of a sliding mandrel in a hydraulically operated switching device in accordance with the present invention;
fig. 6 is a schematic diagram of a setting and releasing state of the hydraulic control switch device according to the embodiment of the present invention;
fig. 7 is a schematic diagram of a seal inspection state of a hydraulic control switch device according to the embodiment of the present invention;
Fig. 8 is a schematic diagram of a hydraulic control switch device according to the embodiment of the present invention;
The figures are marked as follows:
the device comprises a 1-upper joint, a 2-connecting cylinder, a 3-differential pressure outer cylinder, a 4-spring, a 5-sliding mandrel, a 6-lower sliding sleeve, a 7-lower joint, an 8-upper starting pin, a 9-lower starting pin, a 10-upper sealing piece and an 11-lower sealing piece;
301-a liquid discharge hole, 302-a liquid discharge hole and 303-a spring lower limit step;
501-sealing surface, 502-limit step on spring, 503-circulation hole.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the present invention will be clearly and completely described below, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are intended to be within the scope of the present disclosure.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The terms "first," "second," "third," "fourth," and the like as used herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
For ease of description, spatially relative terms, such as "inner," "outer," "lower," "upper," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.
Along with the increasingly wide application of sand control tools of oil and gas wells, the types of setting tools of the packer at the top of the sand control tubular column are also derived into various forms, including single-release setting tools, double-release setting tools and the like, most of internal pressure stabilizing forms are ball throwing modes, namely, steel balls are thrown into a wellhead, the steel balls are impacted by liquid flow and are seated on ball seats, metal contact sealing is achieved between the two materials, and at the moment, the wellhead is continuously pressed to enable the inside of the setting tools to be boosted and stabilized, and the packer at the top is seated. In this state, it is required that impurities cannot be accumulated in the drift diameter of the tubular column, and the requirements on the dimensional precision and the surface quality of the ball body and the ball seat are high, so that the tool cost is high.
Based on the problems, the invention replaces ball throwing and voltage stabilization of a top sealing and setting tool, and provides a hydraulic control switch device which can be matched with the top packer setting tool for use to realize functions of setting, seal checking, positive circulation, reverse circulation and the like.
The upper end of each component in the present invention refers to the end that is closer to the end of the setting tool and the lower end refers to the end that is farther from the end of the setting tool.
As shown in fig. 1 and 2, the hydraulic control switch device provided by the present invention includes:
the pressure difference outer cylinder 3 is connected with the pressure difference outer cylinder through the upper joint 1, the connecting cylinder 2, the pressure difference outer cylinder 3, the spring 4, the sliding mandrel 5, the lower sliding sleeve 6, the lower joint 7, the upper starting pin 8, the lower starting pin 9, the upper sealing element 10 and the lower sealing element 11.
Specifically, the upper joint 1 is cylindrical, the upper end is provided with threads for being connected with the tail end of a setting tool, the inner thread removing parts are sealing surfaces, the roughness is Ra1.6, and the lower end is provided with 4 threaded holes uniformly distributed along the circumferential direction of the threaded holes for installing the upper starting pin 8. The connecting cylinder 2 is integrally provided with threads at two ends in a cylindrical shape, and 4 threaded holes uniformly distributed along the circumferential direction are arranged at the upper end for installing the starting pin 8. The whole differential pressure outer cylinder 3 is cylindrical, threads are designed at the upper end and the lower end, 4 liquid discharging holes 301 are designed at the two sides, a liquid discharging hole 302 is designed in the middle, and a spring lower limit step 303 is arranged at the upper end.
Further, the sliding mandrel 5 is cylindrical as a whole, the upper end is provided with a sealing surface 501, the middle is provided with a spring upper limit step 502, and the lower end is provided with a circulation hole 503; the lower sliding sleeve 6 is cylindrical as a whole, 4 threaded holes uniformly distributed along the circumferential direction of the lower sliding sleeve are designed at the lower end of the lower sliding sleeve and are used for installing a lower starting pin 9, and the upper outer end face is a sealing face. The lower joint 7 is cylindrical as a whole, and blind plugs are arranged below the lower joint. The upper sealing element 10 and the lower sealing element 11 are integrally in a cylindrical structure and are arranged in a V shape, and the roughness of a sealing surface is Ra1.6.
Further, the invention also provides an assembling method of the device, which comprises the following steps: the upper joint 1 is connected with a setting tool by threads, the connecting cylinder 2 is firstly installed on the sliding mandrel 5, then the upper sealing element 10 is installed on the sealing surface 501 of the sliding mandrel 5, then the threaded holes of the upper joint 1, the connecting cylinder 2 and the sliding mandrel 5 are aligned, and the upper starting pin 8 is installed in the threaded holes. The spring 4 is sleeved on the sliding mandrel 5 to prop against the upper limit step 501 of the spring, and the pressure difference outer cylinder 3 is connected with the connecting cylinder 2 by threads.
The lower sealing member 11 is mounted at the lower end limit of the differential pressure outer cylinder 3, the lower sliding sleeve 6 and the lower joint 7 are connected by using the lower starting pin 9, and then the lower joint 7 is connected to the differential pressure outer cylinder 3 by threads.
The invention also provides the working principle of the hydraulic control switch device, which comprises the following specific steps:
The upper joint 1 is connected with a setting tool through threads, at the moment, the upper starting pin 8 and the lower starting pin 9 are not sheared, the liquid outlet 302 is in an open state, fluid in the setting tool is discharged through the liquid outlet 302, as shown in fig. 2, the state can meet the requirement that the sand control pipe column is flushed down while the sand control pipe column is in a closed state after the sand control pipe column reaches a designated position, the displacement can be increased at the moment, a throttling pressure difference is generated at the liquid outlet 302, so that the pressure difference is formed between the inside and the outside of the sliding mandrel 5, the sliding mandrel 5 moves downwards under the action of the pressure difference, at the moment, the upper starting pin 8 is sheared, the sliding mandrel 5 is provided with a spring upper limit step compression spring 4 until the lower end of the sliding mandrel 5 is propped against the upper end of the lower sliding sleeve 6, and at the moment, the liquid outlet 302 is in a closed state, as shown in fig. 6.
At this time, the liquid in the setting tool cannot be discharged, so that pressure stabilization can be realized, and the top packer is set. After the setting is completed, the wellhead releases pressure, the pressure in the setting tool is released at the moment, the sliding mandrel 5 moves upwards under the reset pushing of the spring 4, the liquid outlet 302 is opened at the moment, the top packer setting test can be realized, and if the top packer is failed to be set, liquid can enter the inner cavity of the setting tool through the liquid outlet 302 and return to the wellhead, as shown in fig. 7.
After the seal inspection is finished, the displacement is continuously increased, the sliding mandrel 5 moves downwards again, the liquid outlet hole 302 is closed again, at the moment, the lower starting pin 9 is not sheared by the control pressure, and the inside of the sealing tool is stabilized and taken off again, as shown in fig. 6. After the hand is taken off, the displacement is continuously increased, the shearing force is transmitted through the lamination of the sliding mandrel 5 and the lower sliding sleeve 6, the lower starting pin 9 is sheared, the sliding mandrel 5 continuously moves downwards, the liquid outlet hole 302 is overlapped with the circulating hole 503, at the moment, large-displacement positive circulation can be realized, the aperture of the liquid outlet hole 302 is different from that of the circulating hole 502, and the size of throttling pressure difference can be controlled. After the positive circulation is finished, the sliding mandrel 5 is reset again under the action of the spring 4, so that the reverse circulation or the drill rod lifting is realized, as shown in fig. 8.
The invention provides a new structure matched with a top packer setting tool, which not only can replace ball throwing and pressure stabilizing, but also can automatically open a runner to a preset position under the action of fluid when sand prevention operation needs positive circulation, reverse circulation or seal checking, has a simple structure and low cost, and overcomes the defects of the traditional ball throwing and ball seat structure.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A hydraulically controlled switching device for cooperation with a top seal setting tool, comprising:
the upper joint (1), the first end of the upper joint (1) is connected with the tail end of the setting tool;
the connecting cylinder (2), the first end of the connecting cylinder (2) is detachably connected with the second end of the upper joint (1);
The pressure difference outer cylinder (3) and the sliding mandrel (5), wherein the first end of the sliding mandrel (5) is detachably connected with the second end of the connecting cylinder (2), the pressure difference outer cylinder (3) is sleeved outside the sliding mandrel (5), an elastic piece is arranged between the pressure difference outer cylinder and the sliding mandrel, the second end of the pressure difference outer cylinder (3) is provided with an elastic piece lower limit step, and an elastic piece upper limit step is arranged at the position close to the first end of the sliding mandrel (5);
The lower sliding sleeve (6) and the lower connector (7), wherein the lower connector (7) is sleeved outside the lower sliding sleeve (6), and the lower connector (7) is detachably connected with the pressure difference outer cylinder (3).
2. The hydraulic control switch device according to claim 1, wherein the upper joint (1) is of a hollow cylindrical structure, the inner wall surface of the upper joint (1) is composed of a threaded surface and a sealing surface, the threaded surface is used for being connected with the tail end of a setting tool, and a plurality of threaded holes are uniformly distributed in the circumferential direction of the second end of the upper joint (1).
3. The hydraulic control switch device according to claim 2, wherein the connecting cylinder (2) is of a hollow cylindrical structure as a whole, threads are arranged at two ends of the connecting cylinder, and a plurality of threaded holes are uniformly distributed in the circumferential direction of the first end of the connecting cylinder (2).
4. A hydraulically controlled switching device according to claim 3, characterized in that the sliding spindle (5) is of a hollow cylindrical structure as a whole, the first end is provided with a sealing surface (501) and a threaded hole, the second end is provided with a circulation hole (503), and the threaded hole of the second end of the upper joint (1), the threaded hole of the first end of the connecting cylinder (2) and the threaded hole of the first end of the sliding spindle (5) are connected together by means of an upper start pin (8).
5. The hydraulically controlled switching device according to claim 4, characterized in that the sealing surface (501) is sealingly connected to the sealing surface of the upper joint (1) by means of an upper seal (10).
6. The hydraulic control switch device according to claim 5, wherein the pressure difference outer cylinder (3) is of a hollow cylindrical structure, the first end and the second end are provided with threads, two sides are provided with a plurality of liquid discharging holes (301), and a liquid discharging hole (302) is arranged in the middle.
7. The hydraulic control switch device according to claim 6, wherein the lower sliding sleeve (6) is of a hollow cylindrical structure as a whole, a plurality of threaded holes are uniformly circumferentially arranged at the second end, and the outer wall surface of the first end is a sealing surface.
8. The hydraulic control switch device according to claim 7, wherein the lower joint (7) is integrally in a round hollow cylindrical structure, the second end is blind, a plurality of threaded holes are uniformly circumferentially arranged at the first end of the lower joint (7), and the threaded holes at the second end of the lower sliding sleeve (6) are connected with the threaded holes at the first end of the lower joint (7) through lower starting pins (9).
9. The hydraulic control switch device according to claim 8, characterized in that the sealing surface of the lower sliding sleeve (6) is in sealing connection with the second end limit position of the pressure difference outer cylinder (3) through a lower sealing element (11).
10. A method of assembling a pilot operated switching device as claimed in any one of claims 5 to 9, comprising the steps of:
The upper joint (1) is connected with the tail end of a setting tool through threads, the connecting cylinder (2) is firstly installed on the sliding mandrel (5), then the upper sealing element (10) is installed on the sealing surface (501) of the sliding mandrel (5), then the threaded holes of the upper joint (1), the connecting cylinder (2) and the sliding mandrel (5) are aligned, the upper starting pin (8) is installed in the threaded holes, the elastic element is sleeved on the sliding mandrel (5) to be propped against a limit step on the elastic element, and the differential pressure outer cylinder (3) is connected with the connecting cylinder (2) through threads;
And installing the lower sealing piece (11) to a second end limit position of the pressure difference outer cylinder (3), connecting the lower sliding sleeve (6) and the lower joint (7) by utilizing the lower starting pin (9), and then connecting the lower joint (7) to the pressure difference outer cylinder (3) through threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410173266.XA CN118008202A (en) | 2024-02-07 | 2024-02-07 | Hydraulic control switch device matched with top sealing and setting tool and assembling method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410173266.XA CN118008202A (en) | 2024-02-07 | 2024-02-07 | Hydraulic control switch device matched with top sealing and setting tool and assembling method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118008202A true CN118008202A (en) | 2024-05-10 |
Family
ID=90947418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410173266.XA Pending CN118008202A (en) | 2024-02-07 | 2024-02-07 | Hydraulic control switch device matched with top sealing and setting tool and assembling method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118008202A (en) |
-
2024
- 2024-02-07 CN CN202410173266.XA patent/CN118008202A/en active Pending
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