CN117468887B - Screw thread rotary seat packer for gas injection and production well - Google Patents
Screw thread rotary seat packer for gas injection and production well Download PDFInfo
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- CN117468887B CN117468887B CN202311811754.0A CN202311811754A CN117468887B CN 117468887 B CN117468887 B CN 117468887B CN 202311811754 A CN202311811754 A CN 202311811754A CN 117468887 B CN117468887 B CN 117468887B
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- ball valve
- packer
- pressing plate
- production well
- injection
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 40
- 238000002347 injection Methods 0.000 title claims abstract description 36
- 239000007924 injection Substances 0.000 title claims abstract description 36
- 238000007789 sealing Methods 0.000 claims abstract description 71
- 229920001971 elastomer Polymers 0.000 claims abstract description 42
- 238000003825 pressing Methods 0.000 claims description 45
- 210000002445 nipple Anatomy 0.000 claims description 43
- 230000002457 bidirectional effect Effects 0.000 claims description 39
- 230000005540 biological transmission Effects 0.000 claims description 30
- 230000006835 compression Effects 0.000 claims description 28
- 238000007906 compression Methods 0.000 claims description 28
- 230000036544 posture Effects 0.000 claims description 24
- 238000003780 insertion Methods 0.000 claims description 13
- 230000037431 insertion Effects 0.000 claims description 13
- 238000001125 extrusion Methods 0.000 claims description 8
- 230000005484 gravity Effects 0.000 claims description 4
- 230000001360 synchronised effect Effects 0.000 claims description 4
- 229920006169 Perfluoroelastomer Polymers 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 150000002170 ethers Chemical class 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 9
- 230000007774 longterm Effects 0.000 abstract description 8
- 238000005553 drilling Methods 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 230000000670 limiting effect Effects 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229920001774 Perfluoroether Polymers 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 2
- 230000003712 anti-aging effect Effects 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- UJMWVICAENGCRF-UHFFFAOYSA-N oxygen difluoride Chemical compound FOF UJMWVICAENGCRF-UHFFFAOYSA-N 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000246 remedial effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000003466 welding 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/128—Packers; Plugs with a member expanded radially by axial pressure
-
- 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
- E21B34/12—Valve arrangements for boreholes or wells in wells operated by movement of casings or tubings
-
- 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
- E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
- E21B2200/04—Ball valves
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)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention relates to the technical field of drilling, in particular to a screw thread rotary seat packer for an injection and production well, which aims to solve the technical problems that the working life of the injection and production well is long, the existing packer is usually of a permanent structure and cannot be unsealed, so that after the sealing of the packer fails, the sealing is difficult to remedy, the working life of the packer is insufficient, and the existing packer needs to be provided with a special salvage mechanism so as to salvage the packer after the sealing of the packer fails. According to the packer, the rubber cylinder is fully compressed by rotating the screw thread displacement, so that the air sealing effect is achieved, the whole sealing device is anchored, and the switching between sealing and unsealing can be realized through screw thread rotation. The packer provided by the invention can be switched between the sealing action and the deblocking action, is convenient to overhaul and maintain, further meets the requirement of long-term working life, solves the technical problems that the permanent packer in the prior art cannot be deblocked and has insufficient working life, and does not need to be provided with a special salvaging mechanism.
Description
Technical Field
The invention relates to the technical field of drilling, in particular to a screw thread rotary setting packer for an injection and production well.
Background
In the gas injection and production operation process, the packer at the bottom of the pipe column is required to seal the annulus between the injection and production pipe column and the production casing, and the packer has a good air sealing effect so as to protect the production casing. The working life of the air energy storage injection well is thirty years, which is far longer than that of an oil gas injection well, and the conventional annular packer can not meet the requirements of injection and production operation at present. In order to meet the long-term air-tight effect, a permanent structure is generally adopted, the packer cannot be unsealed or a special salvage mechanism is used for unsealing and salvaging, and after the sealing failure of the packer is caused by corrosion, rust and other reasons under the condition of long-term use, remedial measures are difficult.
The working life of the injection and production well is long, the existing packer usually adopts a permanent structure and cannot be unsealed, so that after the sealing failure of the packer, the sealing failure of the packer is difficult to remedy, the working life of the packer is insufficient, and the existing packer is required to be provided with a special salvage mechanism so as to carry out salvage operation on the packer after the failure.
Disclosure of Invention
The invention provides a screw thread rotary seat sealing packer for an injection and production well, which aims to solve the problems that the working life of the injection and production well is long, the existing packer is usually of a permanent structure and cannot be unsealed, so that the sealing failure of the packer is difficult to remedy, the working life of the packer is insufficient, and the existing packer is required to be provided with a special salvage mechanism so as to salvage the packer after the failure.
In order to alleviate the above technical problems, the technical solution provided in this embodiment is as follows:
an injection and production well thread rotary setting packer comprising: the device comprises a bidirectional pushing mechanism, a sealing assembly, a ball valve mechanism and a seating nipple;
the axis of the bidirectional pushing mechanism is arranged along the vertical direction, and can synchronously extrude upwards and downwards;
the sealing component coaxially surrounds the middle part of the bidirectional pushing mechanism, and has two postures, wherein the first posture is in a contracted state, and the second posture is in an expanded state; the sealing component is extruded along with the upward movement of the bidirectional pushing mechanism and is switched from a first posture to a second posture;
the ball valve mechanism is coaxially arranged below the bidirectional pushing mechanism, and has two states, namely a closed state and an open state; the ball valve mechanism is switched from a first state to a second state along with downward movement and extrusion of the bidirectional pushing mechanism;
the seat nipple is hollow and cylindrical, surrounds the outer walls of the bidirectional pushing mechanism, the sealing assembly and the ball valve mechanism, and is positioned at the inner side of the bottom of the seat nipple;
when the sealing assembly is in the second posture, the seating nipple is matched with the sealing assembly, and the annular space between the sealing assembly and the seating nipple is sealed;
when the ball valve mechanism is in a first state, the seat nipple is matched with the ball valve mechanism, and the bottom opening of the seat nipple is sealed.
Still further, the bi-directional pushing mechanism includes: the telescopic pipe, the upper joint, the lower joint and the compression cylinder;
the telescopic pipe is in threaded connection with the inner side of the bottom of the upper joint, the lower joint is in threaded connection with the outer side of the lower end of the telescopic pipe, the compression cylinder surrounds the outer wall of the telescopic pipe and is axially synchronous with the telescopic pipe, and the upper joint and the compression cylinder are connected with the sealing assembly; the lower joint is connected with the ball valve mechanism;
when the upper joint is static and the telescopic pipe rotates, the telescopic pipe and the lower joint synchronously and reversely displace.
Furthermore, the middle part of the upper joint adopts an opening trapezoid right-handed thread structure, the thread structure is elastically contracted by the gravity of a production pipe column connected to the upper end of the upper joint, the thread structure is led into the internal thread of the landing nipple along a trapezoid inclined plane of the thread, and the bidirectional pushing mechanism is prevented from moving upwards due to the action of high-pressure gas at the lower part in the gas injection and production process, so that the hanging and anchoring effects are achieved;
furthermore, an open trapezoid left-handed thread structure is adopted between the telescopic pipe and the upper joint;
an opening trapezoid right-handed thread structure is adopted between the telescopic pipe and the lower joint;
the right-handed thread pitch is twice that of the left-handed thread pitch, the lower joint is rotated for the same number of turns, and the axial displacement distance of the lower joint is twice that of the telescopic pipe.
Still further, the bi-directional pushing mechanism further comprises: the device comprises a bearing, a fixed ring and two limit strips;
the bearing is arranged below the compression cylinder and is used for reducing friction force caused by direct contact between the telescopic pipe and the compression cylinder when the telescopic pipe rotates, so that torque when the telescopic pipe rotates is greatly reduced;
the fixed ring is arranged below the bearing and is used for axially synchronizing the bearing, the compression cylinder and the telescopic pipe;
the two limit strips are embedded into grooves symmetrically arranged on the outer wall of the lower joint, the bearing and the outer wall of the compression cylinder, the limit strips are used for circumferential synchronization of the lower joint, the bearing and the compression cylinder can slide relatively with the lower joint along the axial direction, and the lower joint and the telescopic pipe are allowed to displace relatively along the axial direction.
Still further, the injection and production well thread rotary setting packer further comprises: the seat seal insertion pipe is directly inserted into the telescopic pipe, the seat seal insertion pipe is connected with the telescopic pipe through a spline, and the seat seal insertion pipe and the telescopic pipe synchronously rotate.
Still further, the seal assembly includes: the device comprises two protection rings, two end rubber barrels, two spacing rings and a middle rubber barrel;
the two protection rings are positioned at two ends;
the two end rubber barrels are correspondingly arranged on the inner sides of the two protection rings, and the end rubber barrels are inserted into the adjacent protection rings and form oblique contact surfaces;
the two spacing rings are correspondingly arranged on the inner sides of the two end rubber barrels;
the middle rubber cylinder is positioned between the two end rubber cylinders and is provided with an inclined contact surface;
the end rubber cylinder and the middle rubber cylinder are expanded outwards along the radial direction after being axially extruded by the two-way pushing mechanism.
Furthermore, the end rubber cylinder and the middle rubber cylinder are made of FFKM perfluoroether rubber materials, and the rubber cylinder has good anti-aging and corrosion resistance under the environments of air, CO2, saline water, CH4 and the like, the long-term use temperature can reach 204 ℃ at most, good sealing performance is ensured, and the service life can reach more than 20 years.
Still further, the ball valve mechanism includes: the ball valve, the first transmission shaft, the second transmission shaft, the upper pressing plate and the lower pressing plate;
the ball valve is longitudinally provided with a circular through hole, and is tangent to a conical surface arranged on the inner side of the opening at the bottom end of the seating nipple;
the first transmission shaft is transversely arranged and connected with the upper pressing plate, the second transmission shaft is transversely arranged and connected with the lower pressing plate, and the first transmission shaft, the second transmission shaft and the ball valve synchronously rotate;
the upper pressing plate and the lower pressing plate have a height difference, the lower pressing plate and the upper pressing plate have a mass difference, and the lower pressing plate is heavier than the upper pressing plate;
further, when the lower connector is pressed down, the upper pressing plate moves down to drive the first transmission shaft at one side of the upper pressing plate to rotate, the ball valve rotates along with the first transmission shaft, the ball valve mechanism is switched to an open state, the ball valve rotates to drive the second transmission shaft at one side of the lower pressing plate to rotate, and the lower pressing plate moves up;
after the lower joint moves upwards, the lower pressing plate descends due to self gravity, so that the ball valve rotates, the ball valve mechanism is switched to a closed state, and the upper pressing plate ascends.
Furthermore, the components of the screw thread rotary seat sealing packer of the gas injection and production well are all subjected to surface cladding welding anti-corrosion treatment by adopting 625 nickel base alloy, so that the long-term anti-corrosion effect is achieved, the thickness of a cladding layer is more than or equal to 0.4mm, and the use of 30 years is satisfied.
The beneficial effects of the invention are analyzed as follows:
an injection and production well thread rotary setting packer comprising: the device comprises a bidirectional pushing mechanism, a sealing assembly, a ball valve mechanism and a seating nipple;
the axis of the bidirectional pushing mechanism is arranged along the vertical direction, and can synchronously extrude upwards and downwards;
the sealing assembly coaxially surrounds the middle of the two-way pushing mechanism, and has two postures, wherein the first posture is in a contracted state, and the second posture is in an expanded state. The sealing component is extruded along with the upward movement of the bidirectional pushing mechanism and is switched from a first posture to a second posture;
the ball valve mechanism is coaxially arranged below the two-way pushing mechanism, and has two states, namely a closed state and an open state. The ball valve mechanism is switched from a first state to a second state along with downward movement and extrusion of the bidirectional pushing mechanism;
the seat nipple is hollow and cylindrical, surrounds the outer walls of the bidirectional pushing mechanism, the sealing assembly and the ball valve mechanism, and is positioned at the inner side of the bottom of the seat nipple;
when the sealing assembly is in the second posture, the seating nipple is matched with the sealing assembly, and the annular space between the sealing assembly and the seating nipple is sealed;
when the ball valve mechanism is in a first state, the seat nipple is matched with the ball valve mechanism, and the bottom opening of the seat nipple is sealed.
The working process comprises the following steps:
sealing action: the bidirectional pushing mechanism synchronously extrudes upwards and downwards, the upward extrusion of the bidirectional pushing mechanism enables the sealing component to be switched from a contracted state to an expanded state, the annular space between the sealing component and the sitting nipple is sealed, the downward extrusion of the bidirectional pushing mechanism enables the ball valve mechanism to be switched from a closed state to an open state, and the bottom opening of the sitting nipple is completely unsealed;
deblocking: the bidirectional pushing mechanism simultaneously retracts downwards and upwards, so that the sealing assembly is switched from an expanding sealing state to a contracting state, an annular space between the sealing assembly and the seating nipple is unsealed, the ball valve mechanism is switched from an opening state to a closing state, and the bottom opening of the seating nipple is sealed;
the packer provided by the scheme can be switched between the sealing action and the deblocking action, is convenient to overhaul and maintain, further meets the requirement of long-term working life, solves the technical problems that the permanent packer in the prior art cannot be deblocked and the working life is insufficient, and does not need to be provided with a special salvaging mechanism.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the related art, the drawings that are required to be used in the description of the embodiments or the related art will be briefly described, and it is apparent that the drawings in the description below are some embodiments of the present invention, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of the unpacking state of the present invention;
FIG. 2 is a schematic view of the whole structure of the sealing state of the present invention;
FIG. 3 is a schematic view of a bi-directional pushing mechanism according to the present invention;
FIG. 4 is an enlarged view of a portion of FIG. 3 at A;
FIG. 5 is a schematic view of a seal assembly according to the present invention;
FIG. 6 is a schematic view of the closed state of the ball valve mechanism of the present invention;
FIG. 7 is a schematic view of the cooperation structure of the upper pressing plate and the first transmission shaft in the closed state of the ball valve mechanism of the invention;
FIG. 8 is a schematic view of the cooperation structure of the lower pressing plate and the second transmission shaft in the closed state of the ball valve mechanism of the invention;
FIG. 9 is a schematic view of the open state structure of the ball valve mechanism of the present invention;
fig. 10 is a schematic view of the structure of the landing nipple of the present invention;
FIG. 11 is a schematic view of a dock seal cannula according to the present invention;
icon:
100. a bidirectional pushing mechanism; 110. a telescopic tube; 120. an upper joint; 130. a lower joint; 140. a compression cylinder; 150. a bearing; 160. a fixing ring; 170. a limit bar; 200. a seal assembly; 210. a protective ring; 220. an end rubber cylinder; 230. a spacer ring; 240. a middle rubber cylinder; 300. a ball valve mechanism; 310. a ball valve; 321. a first drive shaft; 322. a second drive shaft; 330. an upper press plate; 340. a lower pressing plate; 400. a short joint is located; 500. and (5) sealing the cannula.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Examples
In the prior art, the working life of the injection well is long, the packer is generally of a permanent structure and cannot be unsealed, so that after the sealing failure of the packer, the sealing failure of the packer is difficult to remedy, the working life of the packer is insufficient, and the existing packer is required to be provided with a special salvage mechanism so as to carry out salvage operation on the packer after the failure.
As shown in fig. 1-10, the present embodiment provides a screw thread rotary setting packer for an injection and production well, comprising: a bi-directional thrust mechanism 100, a seal assembly 200, a ball valve mechanism 300, and a landing nipple 400; the axis of the bidirectional pushing mechanism 100 is arranged along the vertical direction, and can be synchronously pressed upwards and downwards; the sealing assembly 200 coaxially surrounds the middle part of the bidirectional pushing mechanism 100, and the sealing assembly 200 has two postures, wherein the first posture is in a contracted state, and the second posture is in an expanded state; the seal assembly 200 is switched from the first posture to the second posture along with the upward movement and extrusion of the bidirectional pushing mechanism 100; the ball valve mechanism 300 is coaxially arranged below the bidirectional pushing mechanism 100, and the ball valve mechanism 300 has two states, namely a closed state and an open state; the ball valve mechanism 300 is switched from the first state to the second state along with the downward movement and extrusion of the bidirectional pushing mechanism 100; the seating nipple 400 is hollow and cylindrical, surrounds the outer walls of the bidirectional pushing mechanism 100, the sealing assembly 200 and the ball valve mechanism 300, and the ball valve mechanism 300 is positioned at the inner side of the bottom of the seating nipple 400; when the seal assembly 200 is in the second posture, the landing nipple 400 is matched with the seal assembly 200, so that an annulus between the seal assembly 200 and the landing nipple 400 is sealed; when the ball valve mechanism 300 is in the first state, the landing nipple 400 is also matched with the ball valve mechanism 300, and the bottom opening of the landing nipple 400 is sealed.
The injection and production well thread rotating seat sealing packer provided by the embodiment can realize the following technical effects:
the packer provided by the embodiment can be switched between the sealing action and the deblocking action, is convenient to overhaul and maintain, further meets the requirement of long-term working life, solves the technical problems that the permanent packer in the prior art cannot be deblocked and the working life is insufficient, and does not need to be provided with a special salvaging mechanism.
Regarding the composition of the bidirectional pushing mechanism 100, specifically:
as shown in fig. 3, the bidirectional pushing mechanism 100 includes: the telescopic tube 110, the upper joint 120, the lower joint 130 and the compression cylinder 140, wherein the telescopic tube 110 is in threaded connection with the inner side of the bottom of the upper joint 120, the lower joint 130 is in threaded connection with the outer side of the lower end of the telescopic tube 110, and the compression cylinder 140 surrounds the outer wall of the telescopic tube 110 and is axially synchronous with the telescopic tube 110; the upper joint 120 and the compression cylinder 140 are both connected with the sealing assembly 200, and the lower joint 130 is connected with the ball valve mechanism 300;
when the upper joint 120 is stationary and the telescopic tube 110 rotates, the telescopic tube 110 is reversely displaced in synchronization with the lower joint 130.
Furthermore, the middle part of the upper joint 120 adopts an open trapezoid right-handed thread structure, the thread structure elastically contracts by the downward gravity of a production string connected to the upper end of the upper joint, and the internal thread of the landing nipple 400 is led along the trapezoid inclined plane of the thread, so that the bidirectional pushing mechanism 100 is prevented from moving upwards due to the action of high-pressure gas at the lower part in the gas injection and production process, and plays a role in suspension and anchoring.
Regarding how the bidirectional pushing mechanism 100 achieves synchronous reverse displacement, specifically:
an open trapezoid left-handed thread structure is adopted between the telescopic pipe 110 and the upper joint 120;
an open trapezoid right-handed thread structure is adopted between the telescopic pipe 110 and the lower joint 130;
the right-handed thread pitch is twice the left-handed thread pitch, and the lower joint 130 is rotated for the same number of turns, and the axial displacement distance of the lower joint is twice the axial displacement distance of the telescopic pipe 110; when the upper joint 120 is stationary, the lower joint does not rotate circumferentially relative to the upper joint 120, and the telescopic tube 110 rotates to drive the lower joint 130 to generate a double displacement, and simultaneously, the lower joint 130 also reversely generates a double displacement relative to the telescopic tube 110, so that the telescopic tube 110 and the lower joint 130 can synchronously reversely generate a double displacement.
Still further, the bidirectional pushing mechanism 100 further includes: bearing 150, fixing ring 160 and two limit bars 170; the bearing 150 is arranged below the compression cylinder 140, and is used for reducing friction force caused by direct contact between the telescopic pipe and the compression cylinder when the telescopic pipe rotates, so that torque when the telescopic pipe rotates is greatly reduced;
the fixed ring 160 is arranged below the bearing 150, and the fixed ring 160 is used for axially synchronizing the bearing 150, the compression cylinder 140 and the telescopic pipe 110, so that the upward displacement of the telescopic pipe 110 can be transmitted to the sealing assembly 200 through the compression cylinder 140, and the axial extrusion of the sealing assembly 200 is realized;
the limiting strips 170 are in a T shape, the two limiting strips 170 are embedded into grooves symmetrically arranged on the outer walls of the lower connector 130, the bearing 150 and the compression cylinder 140, and the longitudinal long sides of the limiting strips 170 are used for circumferentially synchronizing the lower connector 130, the bearing 150 and the compression cylinder 140, so that when the telescopic pipe 110 rotates, the lower connector 130 can relatively rotate with the telescopic pipe 110, the bearing 150 and the compression cylinder 140 can relatively slide with the lower connector 130 along the axial direction, and the lower connector 130 and the telescopic pipe 110 are allowed to relatively displace along the axial direction.
Regarding how the telescopic tube 110 rotates, in particular: the screw thread rotation seat seal packer of the gas injection and production well further comprises a seat seal insertion pipe 500, wherein the seat seal insertion pipe 500 is directly inserted into the telescopic pipe 110, the seat seal insertion pipe 500 is connected with the telescopic pipe 110 through a spline, and when the seat seal insertion pipe 500 rotates, the telescopic pipe 110 and the seat seal insertion pipe 500 synchronously rotate through the torque transmission effect of the spline.
With respect to the composition of seal assembly 200, in particular:
as shown in fig. 5, the sealing assembly 200 includes: two protection rings 210, two end glue cylinders 220, two spacer rings 230 and a middle glue cylinder 240;
two guard rings 210 are located at both ends;
the two end rubber barrels 220 are correspondingly arranged at the inner sides of the two protection rings 210, and the end rubber barrels 220 are inserted into the adjacent protection rings 210 and form oblique contact surfaces;
the two spacing rings 230 are correspondingly arranged on the inner sides of the two end rubber cylinders 220;
the middle rubber cylinder 240 is positioned between the two end rubber cylinders 220 and forms an inclined contact surface;
the upper protection ring 210 is connected to the upper joint 120, and the lower protection ring 210 is connected to the compression cylinder 140.
The end rubber cylinder 220 and the middle rubber cylinder 240 are extruded by the bidirectional pushing mechanism 100 in the axial direction and then expand perpendicularly to the axial direction, and as the inner sides of the end rubber cylinder 220 and the middle rubber cylinder 240 are connected with the outer wall of the upper joint 120 and have no space in the axial direction and the radial inward direction, the end rubber cylinder 220 and the middle rubber cylinder 240 expand outwards in the radial direction, so that the sealing of the annular space between the sealing assembly 200 and the seating nipple 400 is realized.
Furthermore, the end rubber cylinder 220 and the middle rubber cylinder 240 are made of FFKM perfluoroether rubber materials, and have good anti-aging and corrosion resistance characteristics in the environments of air, CO2, saline water, CH4 and the like, the long-term use temperature can reach 204 ℃ at most, good sealing performance is ensured, and the service life can reach more than 20 years.
With respect to the composition of the ball valve mechanism 300, specifically:
as shown in fig. 6-8, the ball valve mechanism 300 includes: ball valve 310, first drive shaft 321, second drive shaft 322, upper platen 330 and lower platen 340;
the ball valve 310 is provided with a circular through hole, and the ball valve 310 is tangent with a conical surface arranged at the inner side of the bottom end opening of the landing nipple 400;
as shown in fig. 7, the first transmission shaft 321 is transversely arranged and is in contact connection with the special-shaped notch on the inner wall of the upper pressing plate 330;
as shown in fig. 8, the second transmission shaft 322 is transversely arranged and is in contact connection with a special-shaped notch on the inner wall of the lower pressing plate 340, the first transmission shaft 321, the second transmission shaft 322 and the ball valve 310 are fixedly connected and can synchronously rotate, and one end of the first transmission shaft 321 and the second transmission shaft 322 falls down and the other end of the first transmission shaft 322 tilts up by means of rotation of the ball valve 310;
there is a difference in height between upper platen 330 and lower platen 340, and there is a difference in mass between lower platen 340 and upper platen 330, lower platen 340 being heavier than upper platen 330.
Further, when the lower connector 130 is pressed down, the upper pressing plate 330 moves down to drive the first transmission shaft 321 at one side of the upper pressing plate 330 to rotate, the ball valve 310 rotates along with the upper pressing plate, the ball valve mechanism 300 is switched to an open state, the ball valve 310 rotates to drive the second transmission shaft 322 at one side of the lower pressing plate 340 to rotate, and the lower pressing plate 340 moves up; after the lower joint 130 moves up, the lower platen 340 moves down by its own weight, the ball valve 310 rotates, the ball valve mechanism 300 is switched to the closed state, and the upper platen 330 moves up.
In summary, the working process of the thread rotating set packer for the gas injection and production well provided in this embodiment is described in detail as follows:
the landing nipple is put in along with the production casing of the injection and production well and is preset at the design position at the bottom of the production casing; the ball valve mechanism and the bidirectional pushing mechanism are sequentially arranged along with the injection and production pipe column, are connected to the lowest end of the injection and production pipe column, and the right-handed trapezoid threads at the upper end of the upper joint are connected with the internal threads of the landing nipple by pushing down, so that the bidirectional pushing mechanism is prevented from being displaced due to the pressure effect in the injection and production process; the seat seal insertion pipe is connected to the lowest end of the drill rod along with the drill rod; the lower end of the seat seal insertion pipe adopts a spline structure, and is matched with a spline of an expansion pipe in the bidirectional pushing mechanism to carry out torque transmission; the telescopic pipe is connected with the lower part of the upper joint through trapezoidal left-handed threads, and the upper part of the telescopic pipe is connected with the upper part of the lower joint through trapezoidal right-handed threads;
the sealing of the rotary seat sealing packer is realized through the positive rotation of the drill rod and the set number of turns, the telescopic pipe drives the fixed ring, the bearing and the compression cylinder to move upwards, the sealing assembly is extruded, the sealing assembly is expanded and sealed, the sealing assembly is matched with the inner wall of the seating nipple, the sealing effect is achieved, and the sealing grade can reach V0 grade; simultaneously, the lower joint is driven to move downwards by the telescopic pipe, the upper pressing plate of the ball valve mechanism is extruded, the ball valve is rotated by the lower pressing plate, and the ball valve mechanism is opened;
the rotary seat sealing packer is unsealed by reversely rotating the drill rod for a set number of turns, the telescopic pipe drives the fixed ring, the bearing and the compression cylinder to move downwards, and the sealing assembly is released, so that the sealing assembly is contracted, sealed and unsealed; meanwhile, the telescopic pipe drives the lower joint to move upwards, the upper pressing plate far away from the ball valve mechanism moves upwards, the ball valve rotates, the lower pressing plate moves downwards due to the fact that the quality difference of the lower pressing plate is larger than that of the upper pressing plate, and the ball valve mechanism is closed.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limited thereto; 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 or all of the technical features can be replaced with equivalents; such modifications and substitutions do not depart from the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. An injection and production well thread rotary setting packer, comprising: the device comprises a bidirectional pushing mechanism (100), a sealing assembly (200), a ball valve mechanism (300) and a seating nipple (400);
the axis of the bidirectional pushing mechanism (100) is arranged along the vertical direction, and can synchronously push upwards and downwards;
the sealing assembly (200) coaxially surrounds the middle part of the bidirectional pushing mechanism (100), the sealing assembly (200) has two postures, the first posture is in a contracted state, and the second posture is in an expanded state; the sealing assembly (200) is pressed by the upward movement of the bidirectional pushing mechanism (100) and is switched from a first posture to a second posture;
the ball valve mechanism (300) is coaxially arranged below the bidirectional pushing mechanism (100), the ball valve mechanism (300) has two states, and the first state is a closed state and the second state is an open state; the ball valve mechanism (300) is switched from a first state to a second state along with the downward movement and extrusion of the bidirectional pushing mechanism (100);
the seat nipple (400) is hollow and cylindrical, surrounds the two-way pushing mechanism (100), the sealing assembly (200) and the outer wall of the ball valve mechanism (300), and the ball valve mechanism (300) is positioned at the inner side of the bottom of the seat nipple (400);
when the sealing assembly (200) is in the second posture, the seat nipple (400) is matched with the sealing assembly (200) so that an annulus between the sealing assembly (200) and the seat nipple (400) is sealed;
when the ball valve mechanism (300) is in a first state, the seat nipple (400) is also matched with the ball valve mechanism (300), and the bottom opening of the seat nipple (400) is sealed;
the bi-directional pushing mechanism (100) comprises: a telescopic tube (110), an upper joint (120), a lower joint (130) and a compression cylinder (140);
the telescopic pipe (110) is in threaded connection with the inner side of the bottom of the upper joint (120), the lower joint (130) is in threaded connection with the outer side of the lower end of the telescopic pipe (110), and the compression cylinder (140) surrounds the outer wall of the telescopic pipe (110) and is axially synchronous with the telescopic pipe (110);
when the upper joint (120) is stationary and the telescopic tube (110) rotates, the telescopic tube (110) and the lower joint (130) synchronously and reversely displace.
2. The injection and production well thread rotary set packer of claim 1, wherein:
the middle part of the upper joint (120) is provided with an opening trapezoid right-handed thread structure, the thread structure elastically contracts by pressing down the gravity of a production pipe column connected to the upper end of the upper joint (120), and the upper joint (120) is led into the internal thread of the landing nipple (400) along a trapezoid inclined plane of the thread.
3. The injection and production well thread rotary set packer of claim 2, wherein:
an open trapezoid left-handed thread structure is adopted between the telescopic pipe (110) and the upper joint (120);
an opening trapezoid right-handed thread structure is adopted between the telescopic pipe (110) and the lower joint (130);
the right-handed thread pitch is twice the left-handed thread pitch.
4. The injection and production well thread rotary set packer of claim 3, wherein:
the bi-directional pushing mechanism (100) further comprises: the device comprises a bearing (150), a fixed ring (160) and two limit strips (170);
the bearing (150) is arranged below the compression cylinder (140);
the fixed ring (160) is arranged below the bearing (150) and is used for axially synchronizing the bearing (150), the compression cylinder (140) and the telescopic pipe (110);
the two limit strips (170) are embedded into grooves symmetrically arranged on the outer walls of the lower joint (130), the bearings (150) and the compression cylinder (140) and used for circumferentially synchronizing the lower joint (130), the bearings (150) and the compression cylinder (140).
5. The injection and production well thread rotary set packer of claim 4, comprising: the seat seal insertion pipe (500), the seat seal insertion pipe (500) is directly inserted into the telescopic pipe (110), and the seat seal insertion pipe (500) is connected with the telescopic pipe (110) through a spline.
6. The injection and production well thread rotary set packer of claim 5, wherein:
the seal assembly (200) includes: two protection rings (210), two end rubber cylinders (220), two spacing rings (230) and a middle rubber cylinder (240);
two guard rings (210) are positioned at two ends;
the two end rubber barrels (220) are correspondingly arranged on the inner sides of the two protection rings (210), and the end rubber barrels (220) are inserted into the adjacent protection rings (210) and form oblique contact surfaces;
the two spacing rings (230) are correspondingly arranged at the inner sides of the two end rubber cylinders (220);
the middle rubber cylinder (240) is positioned between the two end rubber cylinders (220) and is provided with an inclined contact surface;
the end rubber cylinder (220) and the middle rubber cylinder (240) are expanded outwards in the radial direction after being extruded.
7. The injection and production well thread rotary set packer of claim 6, wherein:
the end rubber cylinder (220) and the middle rubber cylinder (240) are made of FFKM perfluorinated ether rubber materials.
8. The injection and production well thread rotary set packer of claim 7, wherein:
the ball valve mechanism (300) includes: the ball valve (310), a first transmission shaft (321), a second transmission shaft (322), an upper pressing plate (330) and a lower pressing plate (340);
the ball valve (310) is provided with a circular through hole, and the ball valve (310) is tangent to a conical surface arranged at the inner side of the bottom end opening of the seating nipple (400);
the first transmission shaft (321) is transversely arranged and connected with the upper pressing plate (330), the second transmission shaft (322) is transversely arranged and connected with the lower pressing plate (340), and the first transmission shaft (321), the second transmission shaft (322) and the ball valve (310) synchronously rotate;
a height difference exists between the upper pressing plate (330) and the lower pressing plate (340), a quality difference exists between the lower pressing plate (340) and the upper pressing plate (330), and the lower pressing plate (340) is heavier than the upper pressing plate (330);
the upper pressing plate (330) is pressed down to drive the ball valve (310) to rotate through the first transmission shaft (321), so that the lower pressing plate (340) is driven to move upwards through the second transmission shaft (322).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311811754.0A CN117468887B (en) | 2023-12-27 | 2023-12-27 | Screw thread rotary seat packer for gas injection and production well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311811754.0A CN117468887B (en) | 2023-12-27 | 2023-12-27 | Screw thread rotary seat packer for gas injection and production well |
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| Publication Number | Publication Date |
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| CN117468887A CN117468887A (en) | 2024-01-30 |
| CN117468887B true CN117468887B (en) | 2024-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202311811754.0A Active CN117468887B (en) | 2023-12-27 | 2023-12-27 | Screw thread rotary seat packer for gas injection and production well |
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| CN (1) | CN117468887B (en) |
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| CN111927379A (en) * | 2020-10-14 | 2020-11-13 | 东营市瑞丰石油技术发展有限责任公司 | Bypass packer |
| CN216922076U (en) * | 2021-10-19 | 2022-07-08 | 宝鸡畅油石油设备有限公司 | Hydraulic setting packer in cased well |
| CN116065997A (en) * | 2022-08-02 | 2023-05-05 | 中国石油天然气集团有限公司 | Ball valve sealing device and method for pressure maintaining coring tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1490438A (en) * | 1975-05-27 | 1977-11-02 | Hydril Co | Well flow control valve method and apparatus |
| US4230185A (en) * | 1978-05-31 | 1980-10-28 | Otis Engineering Corporation | Rod operated rotary well valve |
| GB2079825A (en) * | 1980-07-18 | 1982-01-27 | Baker Int Corp | Method and apparatus for temporarily locking open a well flow control device |
| US4603742A (en) * | 1983-10-05 | 1986-08-05 | Hydril Company | Subsurface safety valve |
| US4967844A (en) * | 1989-03-30 | 1990-11-06 | Elder Oil Tools | Selectively operable ball valve and production packer system |
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| CN104864162A (en) * | 2015-04-03 | 2015-08-26 | 中国海洋石油总公司 | Multifunctional ball valve assembly for thickened oil thermal production well |
| CN111927379A (en) * | 2020-10-14 | 2020-11-13 | 东营市瑞丰石油技术发展有限责任公司 | Bypass packer |
| CN216922076U (en) * | 2021-10-19 | 2022-07-08 | 宝鸡畅油石油设备有限公司 | Hydraulic setting packer in cased well |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN117468887A (en) | 2024-01-30 |
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