CN114458201B - Expansion suspension packing device capable of checking packing and use method thereof - Google Patents
Expansion suspension packing device capable of checking packing and use method thereof Download PDFInfo
- Publication number
- CN114458201B CN114458201B CN202110304253.8A CN202110304253A CN114458201B CN 114458201 B CN114458201 B CN 114458201B CN 202110304253 A CN202110304253 A CN 202110304253A CN 114458201 B CN114458201 B CN 114458201B
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- ball seat
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000000725 suspension Substances 0.000 title claims abstract description 25
- 238000012856 packing Methods 0.000 title claims abstract description 24
- 238000007789 sealing Methods 0.000 claims abstract description 125
- 239000004576 sand Substances 0.000 claims abstract description 16
- 238000006073 displacement reaction Methods 0.000 claims abstract description 8
- 238000007689 inspection Methods 0.000 claims abstract description 4
- 210000000078 claw Anatomy 0.000 claims description 39
- 230000007704 transition Effects 0.000 claims description 11
- 238000010276 construction Methods 0.000 claims description 8
- 238000000926 separation method Methods 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims 1
- 210000000664 rectum Anatomy 0.000 claims 1
- 238000002347 injection Methods 0.000 abstract description 14
- 239000007924 injection Substances 0.000 abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 230000002265 prevention Effects 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram 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
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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/01—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for anchoring the tools or the like
-
- 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
- E21B33/127—Packers; Plugs with inflatable sleeve
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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 provides an expansion suspension packing device capable of checking packing and a use method thereof, comprising a well-leaving part and a well-leaving part, wherein the well-leaving part is left at the bottom of a well after setting is completed and is used for suspending a sand control pipe column, and a part forming annular sealing with a casing is provided; the well leaving part is assembled with the well leaving part into a whole when the well is in the well, and the well leaving part can be separated by lifting and releasing hands after the setting is completed and the seal inspection is finished, so that the well head is finally lifted. The invention can suspend the sand control pipe column and seal the annulus between the sand control pipe column and the casing; the sand control pipe column can be provided with a larger inner drift diameter in a production well or a water injection well, so that the production displacement is increased or the injection is larger, and the production requirement of an oil field is met.
Description
Technical Field
The invention relates to the technical field of petroleum and natural gas exploitation, in particular to an expansion suspension packing device capable of checking sealing and a using method thereof.
Background
To increase the internal diameter of the completion string of the water injection well and the production well, an inflatable suspension packer device may be used that has a larger internal diameter relative to the slip packer and is more stable in sealing and positioning than the slip packer. For some water injection wells with higher water injection requirements, the inner diameter of a water injection string must be increased to increase the water injection displacement, and the conventional slip-type suspension packer cannot provide the required inner diameter due to the limitation of a rubber sleeve and slips, so that the large-displacement water injection cannot be met. On the other hand, the same type of expansion suspension packer device in the current market is mainly used for well cementation construction, cannot meet the inner diameter requirement in a large-drift-diameter water injection well, has no function of directly checking sealing after setting, and simultaneously has risks when salvaging core blockage in the hand-off part.
Disclosure of Invention
The invention overcomes the defects in the prior art, the existing expansion suspension packing device is mainly used for well cementation construction, can not meet the inner diameter requirement in a large-drift-diameter water injection well, has no function of directly checking sealing after setting, and provides the expansion suspension packing device capable of checking sealing and the use method thereof, and the expansion suspension packing device can suspend a sand control pipe column and seal an annulus between the sand control pipe column and a casing; the sand control pipe column can be provided with a larger inner drift diameter in a production well or a water injection well, so that the production displacement is increased or the injection is larger, and the production requirement of an oil field is met.
The aim of the invention is achieved by the following technical scheme.
An expansion suspension packing device capable of checking sealing comprises a well-leaving part and a well-leaving part,
the well-leaving part comprises a central tube, an anti-torsion ring, a pull rod, an expansion cone, a sealing ring, an elastic claw and a ball seat, wherein the outer wall of the head end of the central tube forms an upper reducing section of the central tube, the outer wall of the central tube below the upper reducing section of the central tube forms an anti-torsion ring diameter-expanding section, the anti-torsion ring is arranged at the position of the anti-torsion ring diameter-expanding section, the inner surface of the anti-torsion ring is matched with the anti-torsion ring diameter-expanding section, the outer wall of the central tube below the anti-torsion ring diameter-expanding section forms a sealing diameter-expanding section, the outer wall of the central tube below the sealing diameter-expanding section forms a limit diameter-expanding section, the limit diameter-expanding section is used for positioning the expansion cone so as to ensure the position relation between the central tube and the expansion cone in the axial direction, the outer wall of the central tube below the limit diameter-expanding section forms an expansion cone diameter-expanding section, the upper part of the expansion cone diameter-expanding section is connected with the expansion cone through threads, the inner wall of the expansion cone diameter-expanding section below the expansion cone diameter-expanding section is arranged on the expansion cone diameter-expanding section, the inner wall of the expansion cone diameter-expanding section is matched with the anti-torsion ring diameter-expanding section forms a seal diameter-expanding section, the outer diameter-expanding section is formed on the outer wall of the central tube, the limit diameter-expanding section is formed on the position relation between the central tube and the axial direction, the limit diameter-expanding section is formed by the position relation, the central tube, the expansion section is formed on the upper end of the expansion cone diameter section, the expansion section is connected with the expansion section, the expansion section and the diameter section is formed by the expansion section, and the diameter section. The outer wall of the ball seat below the opening nail expanding section is provided with a ball seat positioning expanding section and a ball seat positioning reducing section from top to bottom, the ball seat positioning expanding section and the ball seat positioning reducing section are in transition through an inclined plane, the inclined plane is used for positioning the moving displacement of the ball seat in the sealing cylinder, the outer wall of the ball seat below the ball seat positioning reducing section is provided with a ball seat sealing section, the ball seat sealing section and the inner wall of the sealing cylinder form a sealing structure, the pull rod stretches into the central tube, the outer wall of the tail end of the pull rod is connected with the inner wall of the head end of the ball seat through threads, the outer wall of the head end of the pull rod forms a pull rod reducing section so as to realize the aim of matching with the pull rod limiting reducing section, and further realize the aim of taking out the pull rod and the ball seat by using the central tube, and the middle part of the ball seat is provided with a sealing ball which is matched with the inner wall of the middle part of the ball seat so as to realize the aim of sealing;
the well-leaving part comprises an expansion pipe, a connecting sleeve and a sealing cylinder, wherein the head end and the tail end of the expansion pipe are of a primary expansion structure, the lower part of the torsion-preventing ring is inserted into the head end of the expansion pipe, the tail end inner wall of the expansion pipe is in threaded connection with the head end outer wall of the connecting sleeve, a connecting sleeve diameter-expanding section is formed in the middle of the outer wall of the connecting sleeve, the head end inner wall of the connecting sleeve is of an inclined-plane diameter-expanding section so that a tool can be conveniently put in, a smooth cylindrical section is formed on the inner wall of the connecting sleeve below the inclined-plane diameter-expanding section, an inclined-angle necking section is formed on the inner wall of the connecting sleeve of the smooth cylindrical section, the inner diameter of the inclined-angle necking section is smaller than the outer diameter of the elastic claw so as to ensure that the elastic claw cannot penetrate the connecting sleeve, the tail end outer wall of the connecting sleeve is in threaded connection with the head end inner wall of the sealing cylinder, the upper inner wall of the sealing cylinder forms a sealing cylinder section, the sealing cylinder diameter-reducing section is formed on the lower sealing cylinder inner wall of the sealing cylinder section, and the sealing cylinder diameter-reducing section passes through the sealing cylinder inclined plane, the ball seat inclined plane can prevent the ball seat from moving downwards, and the ball seat from moving downwards and displacing continuously.
The anti-loosening screw thread hole is formed in the outer wall of the head end of the ball seat, and the anti-loosening screw penetrates through the anti-loosening screw thread hole to connect the head end of the ball seat with the tail end of the pull rod so as to ensure the connection strength of the ball seat and the pull rod.
The lower part of the anti-torsion ring expanding section is provided with a positioning nail groove, the anti-torsion ring expanding section is connected with the anti-torsion ring into a whole through the positioning nail, and the front end of the positioning nail extends into the positioning nail groove.
Two central tube O-shaped ring grooves are formed in the side wall of the head end of the expansion cone diameter-reducing section, and the first O-shaped rings are installed in the central tube O-shaped ring grooves and are sealed with the expansion cone.
The outer wall of the head end of the expansion cone adopts a cylindrical structure, a spherical expanding section is formed below the cylindrical structure, and adjacent spherical expanding sections are in transition through inclined plane tangential lines.
An opening nail threaded hole is formed in the outer wall of the elastic claw below the elastic groove, an opening nail groove is formed in the opening nail expanding section, the center of the opening nail threaded hole coincides with the center of the opening nail groove in the axial direction, and the opening nail penetrates through the opening nail threaded hole and the opening nail groove to connect the elastic claw with the ball seat.
And the ball seat sealing section is provided with a ball seat sealing groove, and a third O-shaped ring is arranged in the ball seat sealing groove.
Rectangular key grooves are formed in the inner wall of the head end of the expansion pipe, anti-rotation keys are uniformly arranged on the outer wall of the lower portion of the anti-torsion ring and extend into the rectangular key grooves, and therefore the purpose that the central pipe, the anti-torsion ring and the expansion pipe rotate according to the same phase angle is achieved.
The expansion pipe is characterized in that 16 connecting nail screw holes are formed in the outer wall of the tail end of the expansion pipe, 8 connecting nail screw holes are distributed in two rows from top to bottom every week, two connecting sleeve O-shaped ring grooves are formed in the outer wall of the head end of the connecting sleeve, second O-shaped rings are arranged in the connecting sleeve O-shaped ring grooves, two connecting nail concave grooves are formed in the lower portion of the connecting sleeve O-shaped ring grooves, the connecting nail concave grooves correspond to the connecting nail screw holes one by one, and connecting nails penetrate through the connecting nail screw holes and extend into the connecting nail concave grooves.
The outer wall of the sealing cylinder forms a necking section and is transited through an inclined plane, and the outer wall of the tail end of the sealing cylinder is provided with a male sleeve thread so as to achieve the purpose of being connected with a sand prevention pipe column of a well completion pipe column.
The head end inner wall of the central tube adopts an oil pipe box or a drill rod box so as to achieve the purpose of connecting a construction tubular column, the upper inner wall of the central tube adopts an drift diameter structure, the inner diameter of the upper part of the central tube is larger than the maximum outer diameter of the pull rod so that the pull rod can freely move up and down in the central tube, and a reducing section on the central tube can be used for a pipe tongs so as to be connected with the construction tubular column.
The application method of the expansion suspension packing device capable of checking the seal comprises the following steps:
step 1, setting process:
the method comprises the steps that a suspension packing device is lowered to a preset position in a well through a drill rod or an oil pipe, if the suspension packing device is lifted up when the suspension packing device is lowered into the well, lifting force of a central pipe is applied to an elastic claw, namely a transition inclined plane formed by an elastic diameter-expanding section of the outer wall of the elastic claw and a pull rod limit diameter-reducing section of the inner wall of the elastic claw can be abutted against an inclined angle necking section of a connecting sleeve, so that all lifting force is applied to the elastic claw, an expansion cone does not expand the expansion pipe in advance, hydraulic pressure is applied to the inner wall of the central pipe, the sealing ring and the expansion cone are acted on by the hydraulic pressure, the sealing ring and the expansion cone are forced to have a trend of moving upwards, meanwhile, a ball seat is pushed downwards under the action of the hydraulic pressure, the downward movement trend is realized, as the hydraulic pressure value is increased, the opening nail is sheared, the sealing ring and the expansion cone starts to move upwards, the central pipe is lifted upwards slowly, the ball seat starts to move downwards, and when the ball seat stops moving to the sealing cylinder inclined plane, the expansion cone continues to rise, the expansion cone starts to expand the expansion pipe, and the sealing module on the sleeve is abutted to the inner wall of the pipe, and the expansion cone is formed under the moment, and the sealing cone is suddenly stopped from the pipe, and the sealing is stopped when the pressure is stopped from the pipe and is lifted from 0;
step 2, seal inspection process:
continuously pumping hydraulic pressure into the casing, wherein the sealing module of the expansion pipe is matched and sealed with the casing, the third O-shaped ring at the outer side of the ball seat is matched and sealed with the inner wall of the sealing cylinder, the numerical value of the hydraulic pressure is increased, the hydraulic pressure is stopped, the pressure value is not reduced, if the hydraulic pressure is reduced, the hydraulic pressure is not completely sealed, the process of the step 1 is required to be repeated, the hydraulic pressure is not reduced, the hydraulic pressure is completely sealed, and the well-leaving process of the well-leaving part is carried out;
step 3, well separation process of the well separation part:
after the seal checking process is finished, the central tube is lifted up continuously, the expansion cone is kept away from the expanded expansion tube, at the moment, the central tube, the expansion cone, the sealing ring and the elastic claw move upwards together, the pull rod, the ball seat and the sealing ball do not move upwards at the moment and are always at the position during seal setting, when the pull rod limiting diameter reducing section of the elastic claw contacts with the pull rod diameter reducing section of the pull rod, the ball seat and the sealing ball move upwards along with the elastic claw until the well leaving part separated from the well leaving part, the central tube is lifted up continuously, finally the well leaving part is lifted up, the well leaving part is left at the bottom of the well and is hung on the sand prevention pipe column, and the well leaving part becomes a part of the well completion pipe column in the well, namely the well leaving process of the well leaving part is completed.
The beneficial effects of the invention are as follows: the invention can suspend the sand control pipe column and seal the annulus between the sand control pipe column and the casing; the sand control pipe column can be provided with a larger inner drift diameter in a production well or a water injection well, so that the production displacement is increased or the injection is larger, and the production requirement of an oil field is met; the invention can complete the suspension of the well completion sand prevention pipe column by one pipe column, and can carry out seal checking and hand releasing in the pipe column to ensure the sealing reliability of the invention.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
in the figure: 1 is a central tube; 2 is an anti-torsion ring; 3 is a positioning nail; 4 is an expansion pipe; 5 is a pull rod; 6 is a first O-shaped ring; 7 is an expansion cone; 8 is a sealing ring; 9 is an elastic claw; 10 is a second O-ring; 11 is a connecting nail; 12 is a connecting sleeve; 13 is a locking nail; 14 is an opening pin; 15 is a ball seat; 16 is a sealing ball; 17 is a sealing cylinder; and 18 is a third O-ring.
Other relevant drawings may be made by those of ordinary skill in the art from the above figures without undue burden.
Detailed Description
The technical scheme of the invention is further described by specific examples.
Example 1
An expansion suspension packing device capable of checking sealing comprises a well-leaving part and a well-leaving part,
the well-leaving part comprises a central tube 1, a torsion-preventing ring 2, a pull rod 5, an expansion cone 7, a sealing ring 8, an elastic claw 9 and a ball seat 15, wherein the outer wall of the head end of the central tube 1 forms an upper reducing section of the central tube, an upper reducing section of the expansion cone is formed on the outer wall of the central tube below the upper reducing section of the central tube, the torsion-preventing ring 2 is arranged at the position of the upper reducing section of the torsion-preventing ring, the inner surface of the torsion-preventing ring 2 is matched with the expansion section of the torsion-preventing ring, a sealing reducing section is formed on the outer wall of the central tube 1 below the expansion section of the torsion-preventing ring, a limit reducing section is formed on the outer wall of the central tube 1 below the expansion section of the sealing ring, a limit reducing section is formed on the outer wall of the central tube 1 below the sealing reducing section of the sealing ring, a limit reducing section is used for positioning the expansion cone 7 so as to ensure the axial position relation between the central tube 1 and the expansion cone 7, an expansion cone reducing section is formed on the outer wall of the central tube 1 below the limit reducing section of the central tube, the upper reducing section of the central tube is connected with the expansion cone 7 through threads, the inner wall 8 is arranged on the expansion cone reducing section of the expansion cone section below the expansion cone, the inner wall 8 is mounted on the expansion cone section of the expansion cone section, the sealing ring is connected with the end of the expansion cone is formed on the end of the sealing ring, the end 9 is formed on the end of the expansion cone, the expansion cone is formed on the end of the expansion cone is formed by a limit expansion section, and the expansion claw is formed by the expansion section is formed by a stop, and the expansion claw is formed and the expansion section is formed. The ball seat positioning expanding section and the ball seat positioning reducing section are in transition through an inclined plane, the inclined plane is used for positioning the movement displacement of the ball seat 15 in the sealing cylinder 17, a ball seat sealing section is formed on the outer wall of the ball seat 15 below the ball seat positioning reducing section, the ball seat sealing section and the inner wall of the sealing cylinder 17 form a sealing structure, the pull rod 5 stretches into the central pipe 1, the outer wall of the tail end of the pull rod 5 is in threaded connection with the inner wall of the head end of the ball seat 15, the outer wall of the head end of the pull rod 5 forms a pull rod reducing section so as to realize the purpose of matching with the pull rod limiting reducing section, the purpose of taking out the pull rod 5 and the ball seat 15 by using the central pipe 1 is realized, the sealing ball 16 is arranged in the middle of the ball seat 15, and the sealing ball 16 is matched with the inner wall of the middle part of the ball seat 15 so as to realize the purpose of sealing;
the well-leaving part comprises an expansion pipe 4, a connecting sleeve 12 and a sealing barrel 17, wherein the head end and the tail end of the expansion pipe 4 adopt a primary expansion structure, the lower part of an anti-torsion ring 2 is inserted into the head end of the expansion pipe 4, the tail end inner wall of the expansion pipe 4 is in threaded connection with the head end outer wall of the connecting sleeve 12, a connecting sleeve diameter-expanding section is formed in the middle of the outer wall of the connecting sleeve 12, the head end inner wall of the connecting sleeve 12 adopts an inclined surface diameter-expanding section so as to facilitate the tool to be put in, a smooth barrel-shaped section is formed on the inner wall of the connecting sleeve 12 below the inclined surface diameter-expanding section, an inclined angle necking section is formed on the inner wall of the connecting sleeve 12 of the smooth barrel-shaped section, the inner diameter of the inclined angle necking section is smaller than the outer diameter of an elastic claw 9 so as to ensure that the elastic claw 9 cannot penetrate through the connecting sleeve 12, the tail end outer wall of the connecting sleeve 12 is in threaded connection with the head end inner wall of the sealing barrel 17, a sealing barrel section is formed on the upper inner wall of the sealing barrel 17, a sealing barrel diameter-reducing section is formed on the lower sealing barrel inner wall of the sealing barrel section, the sealing barrel section and the sealing barrel diameter-reducing section passes through the sealing barrel inclined surface transition, the sealing barrel ball seat 15 continues to move downwards so as to play a role in limiting the maximum movement of the ball seat 15.
Example two
On the basis of the first embodiment, an anti-loosening screw hole is formed in the outer wall of the head end of the ball seat 15, and the anti-loosening screw 13 penetrates through the anti-loosening screw hole to connect the head end of the ball seat 15 with the tail end of the pull rod 5 so as to ensure the connection strength of the ball seat 15 and the pull rod 5.
The lower part of the torsion-preventing ring expanding section is provided with a positioning nail groove, the torsion-preventing ring expanding section and the torsion-preventing ring 2 are connected into a whole through the positioning nail 3, and the front end of the positioning nail 3 extends into the positioning nail groove.
Two central tube O-shaped ring grooves are formed in the side wall of the head end of the expansion cone diameter-reducing section, and the first O-shaped ring 6 is arranged in the central tube O-shaped ring grooves and forms a seal with the expansion cone 7.
The outer wall of the head end of the expansion cone 7 adopts a cylindrical structure, a spherical expanding section is formed below the cylindrical structure, and adjacent spherical expanding sections are transited through inclined plane tangent lines.
An opening nail screw hole is formed in the outer wall of the elastic claw 9 below the elastic groove, an opening nail groove is formed in the opening nail expanding section, the center of the opening nail screw hole coincides with the center of the opening nail groove in the axial direction, and the opening nail 14 penetrates through the opening nail screw hole and the opening nail groove to connect the elastic claw 9 with the ball seat 15.
A ball seat seal groove is formed in the ball seat seal section and a third O-ring 18 is mounted in the ball seat seal groove.
Example III
On the basis of the second embodiment, a rectangular key slot is formed in the inner wall of the head end of the expansion pipe 4, anti-rotation keys are uniformly arranged on the outer wall of the lower part of the anti-torsion ring 2 and extend into the rectangular key slot, so that the purpose that the central pipe 1, the anti-torsion ring 2 and the expansion pipe 4 rotate according to the same phase angle is achieved.
The outer wall of the tail end of the expansion pipe 4 is provided with 16 connecting nail screw holes, 8 connecting nail screw holes are distributed in two rows from top to bottom every week, the outer wall of the head end of the connecting sleeve 12 is provided with two connecting sleeve O-shaped ring grooves, the second O-shaped ring 10 is arranged in the connecting sleeve O-shaped ring grooves, two connecting nail concave grooves are arranged below the connecting sleeve O-shaped ring grooves, the connecting nail concave grooves are in one-to-one correspondence with the connecting nail screw holes, and the connecting nails 11 penetrate through the connecting nail screw holes and extend into the connecting nail concave grooves.
The outer wall of the sealing cylinder 17 forms a necking section, and through inclined plane transition, the outer wall of the tail end of the sealing cylinder 17 is provided with male sleeve threads so as to realize the purpose of connection with the sand prevention pipe column of the well completion pipe column.
The head end inner wall of the central tube 1 adopts an oil pipe box or a drill rod box so as to achieve the purpose of connecting a construction tubular column, the upper inner wall of the central tube 1 adopts an drift diameter structure, the inner diameter of the upper part of the central tube 1 is larger than the maximum outer diameter of the pull rod 5, so that the pull rod 5 can move freely up and down in the central tube, and a pipe clamp can be arranged on the reducing section of the central tube 1 so as to be connected with the construction tubular column.
Example IV
The application method of the expansion suspension packing device capable of checking the seal comprises the following steps:
step 1, setting process:
the method comprises the steps that a suspension packing device is lowered to a preset position in a well through a drill rod or an oil pipe, if the suspension packing device is lifted up when the suspension packing device is lowered into the well, lifting force of a central pipe is applied to an elastic claw, namely a transition inclined plane formed by an elastic diameter-expanding section of the outer wall of the elastic claw and a pull rod limit diameter-reducing section of the inner wall of the elastic claw can be abutted against an inclined angle necking section of a connecting sleeve, so that all lifting force is applied to the elastic claw, an expansion cone does not expand the expansion pipe in advance, hydraulic pressure is applied to the inner wall of the central pipe, the sealing ring and the expansion cone are acted on by the hydraulic pressure, the sealing ring and the expansion cone are forced to have a trend of moving upwards, meanwhile, a ball seat is pushed downwards under the action of the hydraulic pressure, the downward movement trend is realized, as the hydraulic pressure value is increased, the opening nail is sheared, the sealing ring and the expansion cone starts to move upwards, the central pipe is lifted upwards slowly, the ball seat starts to move downwards, and when the ball seat stops moving to the sealing cylinder inclined plane, the expansion cone continues to rise, the expansion cone starts to expand the expansion pipe, and the sealing module on the sleeve is abutted to the inner wall of the pipe, and the expansion cone is formed under the moment, and the sealing cone is suddenly stopped from the pipe, and the sealing is stopped when the pressure is stopped from the pipe and is lifted from 0;
step 2, seal inspection process:
continuously pumping hydraulic pressure into the casing, wherein the sealing module of the expansion pipe is matched and sealed with the casing, the third O-shaped ring at the outer side of the ball seat is matched and sealed with the inner wall of the sealing cylinder, the numerical value of the hydraulic pressure is increased, the hydraulic pressure is stopped, the pressure value is not reduced, if the hydraulic pressure is reduced, the hydraulic pressure is not completely sealed, the process of the step 1 is required to be repeated, the hydraulic pressure is not reduced, the hydraulic pressure is completely sealed, and the well-leaving process of the well-leaving part is carried out;
step 3, well separation process of the well separation part:
after the seal checking process is finished, the central tube is lifted up continuously, the expansion cone is kept away from the expanded expansion tube, at the moment, the central tube, the expansion cone, the sealing ring and the elastic claw move upwards together, the pull rod, the ball seat and the sealing ball do not move upwards at the moment and are always at the position during seal setting, when the pull rod limiting diameter reducing section of the elastic claw contacts with the pull rod diameter reducing section of the pull rod, the ball seat and the sealing ball move upwards along with the elastic claw until the well leaving part separated from the well leaving part, the central tube is lifted up continuously, finally the well leaving part is lifted up, the well leaving part is left at the bottom of the well and is hung on the sand prevention pipe column, and the well leaving part becomes a part of the well completion pipe column in the well, namely the well leaving process of the well leaving part is completed.
Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used in the embodiments for ease of description to describe one element or feature's relationship to another element or feature's illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "under" other elements or features would then be oriented "over" the other elements or features. Thus, the exemplary term "lower" may encompass both an upper and lower orientation. The device may be otherwise positioned (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Moreover, relational terms such as "first" and "second", and the like, may be used solely to distinguish one element from another element having the same name, without necessarily requiring or implying any actual such relationship or order between such elements.
The foregoing detailed description of the invention has been presented for purposes of illustration and description, but is not intended to limit the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.
Claims (10)
1. An expansion suspension packing device capable of checking sealing, which is characterized in that: comprises a well-leaving part and a well-leaving part,
the well-leaving part comprises a central tube, an anti-torsion ring, a pull rod, an expansion cone, a sealing ring, an elastic claw and a ball seat, wherein the outer wall of the head end of the central tube forms an upper reducing section of the central tube, the outer wall of the central tube below the upper reducing section of the central tube forms an anti-torsion ring diameter-expanding section, the anti-torsion ring is arranged at the position of the anti-torsion ring diameter-expanding section, the inner surface of the anti-torsion ring is matched with the anti-torsion ring diameter-expanding section, the outer wall of the central tube below the anti-torsion ring diameter-expanding section forms a sealing diameter-expanding section, the outer wall of the central tube below the sealing diameter-expanding section forms a limit diameter-expanding section, the limit diameter-expanding section is used for positioning the expansion cone so as to ensure the position relation between the central tube and the expansion cone in the axial direction, the outer wall of the central tube below the limit diameter-expanding section forms an expansion cone diameter-expanding section, the upper part of the expansion cone diameter-expanding section is connected with the expansion cone through threads, the inner wall of the expansion cone diameter-expanding section below the expansion cone diameter-expanding section is arranged on the expansion cone diameter-expanding section, the inner wall of the expansion cone diameter-expanding section is matched with the anti-torsion ring diameter-expanding section forms a seal diameter-expanding section, the outer diameter-expanding section is formed on the outer wall of the central tube, the limit diameter-expanding section is formed on the position relation between the central tube and the axial direction, the limit diameter-expanding section is formed by the position relation, the central tube, the expansion section is formed on the upper end of the expansion cone diameter section, the expansion section is connected with the expansion section, the expansion section and the diameter section is formed by the expansion section, and the diameter section. The outer wall of the ball seat below the opening nail expanding section is provided with a ball seat positioning expanding section and a ball seat positioning reducing section from top to bottom, the ball seat positioning expanding section and the ball seat positioning reducing section are in transition through an inclined plane, the inclined plane is used for positioning the moving displacement of the ball seat in the sealing cylinder, the outer wall of the ball seat below the ball seat positioning reducing section is provided with a ball seat sealing section, the ball seat sealing section and the inner wall of the sealing cylinder form a sealing structure, the pull rod stretches into the central tube, the outer wall of the tail end of the pull rod is connected with the inner wall of the head end of the ball seat through threads, the outer wall of the head end of the pull rod forms a pull rod reducing section so as to realize the aim of matching with the pull rod limiting reducing section, and further realize the aim of taking out the pull rod and the ball seat by using the central tube, and the middle part of the ball seat is provided with a sealing ball which is matched with the inner wall of the middle part of the ball seat so as to realize the aim of sealing;
the well-leaving part comprises an expansion pipe, a connecting sleeve and a sealing cylinder, wherein the head end and the tail end of the expansion pipe are of a primary expansion structure, the lower part of the torsion-preventing ring is inserted into the head end of the expansion pipe, the tail end inner wall of the expansion pipe is in threaded connection with the head end outer wall of the connecting sleeve, a connecting sleeve diameter-expanding section is formed in the middle of the outer wall of the connecting sleeve, the head end inner wall of the connecting sleeve is of an inclined-plane diameter-expanding section so that a tool can be conveniently put in, a smooth cylindrical section is formed on the inner wall of the connecting sleeve below the inclined-plane diameter-expanding section, an inclined-angle necking section is formed on the inner wall of the connecting sleeve of the smooth cylindrical section, the inner diameter of the inclined-angle necking section is smaller than the outer diameter of the elastic claw so as to ensure that the elastic claw cannot penetrate the connecting sleeve, the tail end outer wall of the connecting sleeve is in threaded connection with the head end inner wall of the sealing cylinder, the upper inner wall of the sealing cylinder forms a sealing cylinder section, the sealing cylinder diameter-reducing section is formed on the lower sealing cylinder inner wall of the sealing cylinder section, and the sealing cylinder diameter-reducing section passes through the sealing cylinder inclined plane, the ball seat inclined plane can prevent the ball seat from moving downwards, and the ball seat from moving downwards and displacing continuously.
2. An expandable hanging packer device capable of testing seals as in claim 1, wherein: a locking screw thread hole is formed in the outer wall of the head end of the ball seat, and a locking screw penetrates through the locking screw thread hole to connect the head end of the ball seat with the tail end of the pull rod; the lower part of the anti-torsion ring expanding section is provided with a positioning nail groove, the anti-torsion ring expanding section is connected with the anti-torsion ring into a whole through the positioning nail, and the front end of the positioning nail extends into the positioning nail groove.
3. An expandable hanging packer device capable of testing seals as in claim 1, wherein: two central tube O-shaped ring grooves are formed in the side wall of the head end of the expansion cone diameter-reducing section, and the first O-shaped ring is installed in the central tube O-shaped ring grooves and is sealed with the expansion cone.
4. An expandable hanging packer device capable of testing seals as in claim 1, wherein: the outer wall of the head end of the expansion cone adopts a cylindrical structure, a spherical expanding section is formed below the cylindrical structure, and adjacent spherical expanding sections are in transition through inclined plane tangential lines.
5. An expandable hanging packer device capable of testing seals as in claim 1, wherein: an opening nail threaded hole is formed in the outer wall of the elastic claw below the elastic groove, an opening nail groove is formed in the opening nail expanding section, the center of the opening nail threaded hole coincides with the center of the opening nail groove in the axial direction, and the opening nail penetrates through the opening nail threaded hole and the opening nail groove to connect the elastic claw with the ball seat.
6. An expandable hanging packer device capable of testing seals as in claim 1, wherein: and the ball seat sealing section is provided with a ball seat sealing groove, and a third O-shaped ring is arranged in the ball seat sealing groove.
7. An expandable hanging packer device capable of testing seals as in claim 1, wherein: rectangular key grooves are formed in the inner wall of the head end of the expansion pipe, anti-rotation keys are uniformly arranged on the outer wall of the lower portion of the anti-torsion ring, and the anti-rotation keys extend into the rectangular key grooves.
8. An expandable hanging packer device capable of testing seals as in claim 1, wherein: the expansion pipe is characterized in that 16 connecting nail screw holes are formed in the outer wall of the tail end of the expansion pipe, 8 connecting nail screw holes are distributed in two rows from top to bottom every week, two connecting sleeve O-shaped ring grooves are formed in the outer wall of the head end of the connecting sleeve, second O-shaped rings are arranged in the connecting sleeve O-shaped ring grooves, two connecting nail concave grooves are formed in the lower portion of the connecting sleeve O-shaped ring grooves, the connecting nail concave grooves correspond to the connecting nail screw holes one by one, and connecting nails penetrate through the connecting nail screw holes and extend into the connecting nail concave grooves.
9. An expandable hanging packer device capable of testing seals as in claim 1, wherein: the outer wall of the sealing cylinder forms a necking section and passes through the inclined plane transition, the male sleeve screw thread has been seted up to the tail end outer wall of sealing cylinder, the head end inner wall of center tube adopts oil pipe box or drilling rod box to realize the purpose of connecting construction tubular column, the upper portion inner wall of center tube adopts the latus rectum structure, the internal diameter of the upper portion of center tube is greater than the biggest external diameter of pull rod to the pull rod is free to remove from top to bottom in the center tube, the reducing section can beat the breakout tongs on the center tube, in order to be connected with the construction tubular column.
10. A method of using an expandable hanging packer device capable of testing seals as claimed in any one of claims 1 to 9, wherein: the method comprises the following steps of:
step 1, setting process:
the method comprises the steps that a suspension packing device is lowered to a preset position in a well through a drill rod or an oil pipe, if the suspension packing device is lifted up when the suspension packing device is lowered into the well, lifting force of a central pipe is applied to an elastic claw, namely a transition inclined plane formed by an elastic diameter-expanding section of the outer wall of the elastic claw and a pull rod limit diameter-reducing section of the inner wall of the elastic claw can be abutted against an inclined angle necking section of a connecting sleeve, so that all lifting force is applied to the elastic claw, an expansion cone does not expand the expansion pipe in advance, hydraulic pressure is applied to the inner wall of the central pipe, the sealing ring and the expansion cone are acted on by the hydraulic pressure, the sealing ring and the expansion cone are forced to have a trend of moving upwards, meanwhile, a ball seat is pushed downwards under the action of the hydraulic pressure, the downward movement trend is realized, as the hydraulic pressure value is increased, the opening nail is sheared, the sealing ring and the expansion cone starts to move upwards, the central pipe is lifted upwards slowly, the ball seat starts to move downwards, and when the ball seat stops moving to the sealing cylinder inclined plane, the expansion cone continues to rise, the expansion cone starts to expand the expansion pipe, and the sealing module on the sleeve is abutted to the inner wall of the pipe, and the expansion cone is formed under the moment, and the sealing cone is suddenly stopped from the pipe, and the sealing is stopped when the pressure is stopped from the pipe and is lifted from 0;
step 2, seal inspection process:
continuously pumping hydraulic pressure into the casing, wherein the sealing module of the expansion pipe is matched and sealed with the casing, the third O-shaped ring at the outer side of the ball seat is matched and sealed with the inner wall of the sealing cylinder, the numerical value of the hydraulic pressure is increased, the hydraulic pressure is stopped, the pressure value is not reduced, if the hydraulic pressure is reduced, the hydraulic pressure is not completely sealed, the process of the step 1 is required to be repeated, the hydraulic pressure is not reduced, the hydraulic pressure is completely sealed, and the well-leaving process of the well-leaving part is carried out;
step 3, well separation process of the well separation part:
after the seal checking process is finished, the central tube is lifted up continuously, the expansion cone is kept away from the expanded expansion tube, at the moment, the central tube, the expansion cone, the sealing ring and the elastic claw move upwards together, the pull rod, the ball seat and the sealing ball do not move upwards at the moment and are always at the position during seal setting, when the pull rod limiting diameter reducing section of the elastic claw contacts with the pull rod diameter reducing section of the pull rod, the ball seat and the sealing ball move upwards along with the elastic claw until the well leaving part leaves the well leaving part, the central tube is lifted up continuously, finally the well leaving part is lifted up to the wellhead, and the well leaving part is left at the bottom of the well and hangs a sand control string to form a part of a well completion string, namely the well leaving process of the well leaving part is completed.
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| CN202110304253.8A CN114458201B (en) | 2021-03-22 | 2021-03-22 | Expansion suspension packing device capable of checking packing and use method thereof |
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| CN202110304253.8A CN114458201B (en) | 2021-03-22 | 2021-03-22 | Expansion suspension packing device capable of checking packing and use method thereof |
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