CN114458201A - Expansion suspension packing device capable of checking seal and using method thereof - Google Patents
Expansion suspension packing device capable of checking seal and using method thereof Download PDFInfo
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- CN114458201A CN114458201A CN202110304253.8A CN202110304253A CN114458201A CN 114458201 A CN114458201 A CN 114458201A CN 202110304253 A CN202110304253 A CN 202110304253A CN 114458201 A CN114458201 A CN 114458201A
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000012856 packing Methods 0.000 title claims abstract description 26
- 239000000725 suspension Substances 0.000 title claims abstract description 22
- 239000004576 sand Substances 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims description 138
- 210000000078 claw Anatomy 0.000 claims description 52
- 230000007704 transition Effects 0.000 claims description 12
- 238000010276 construction Methods 0.000 claims description 8
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 238000005553 drilling Methods 0.000 claims description 3
- 210000000664 rectum Anatomy 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 2
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 230000003442 weekly effect Effects 0.000 claims description 2
- 238000012795 verification Methods 0.000 claims 7
- 238000012360 testing method Methods 0.000 claims 1
- 238000002347 injection Methods 0.000 abstract description 11
- 239000007924 injection Substances 0.000 abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 230000014759 maintenance of location Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- 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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Abstract
The invention provides an expansion suspension packing device capable of checking seal and a using method thereof, comprising a well remaining part and a well separating part, wherein the well remaining part is left at the bottom of a well after setting is finished and is used for suspending a sand control pipe column and providing a part which is sealed in an annular way with a casing; the well leaving part is integrated with the well remaining part when the well is put in, and after the setting is finished and the seal checking is finished, the well leaving part can be separated in a lifting and releasing way and finally lifted out of a well mouth. The invention can hang the sand control pipe column and seal the annular space 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 discharge capacity is increased or larger discharge capacity is injected, and the production requirement of an oil field is met.
Description
Technical Field
The invention relates to the technical field of oil and gas exploitation, in particular to an expansion suspension packing device capable of checking packing and a using method thereof.
Background
To increase the internal drift diameter of the completion string for water injection and production wells, an inflatable suspension packer device may be used that has a larger internal drift 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 quantity requirements, the inner diameter of a water injection pipe column must be increased for increasing the water injection discharge capacity, and the conventional slip type suspension packer cannot provide the required inner drift diameter due to the limitation of a rubber sleeve and a slip and cannot meet the large-discharge water injection. On the other hand, the similar expansion suspension packing device in the market is mainly used for well cementation construction, cannot meet the requirement of the inner diameter of a large-drift-diameter water injection well, does not have the function of directly checking the packing after setting, and simultaneously has risks when fishing and disconnecting the 'core plug' inside the wrench.
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, and has no function of directly checking the packing after setting, and the invention provides the expansion suspension packing device capable of checking the packing and the use method thereof; the inner drift diameter can be larger for the sand control pipe column in a production well or a water injection well, so that the production discharge capacity is increased or larger discharge capacity is injected, and the production requirement of an oil field is met.
The purpose of the invention is realized by the following technical scheme.
An expansion suspension packer capable of checking a seal comprises a well retention part and a well leaving part,
the well-leaving part comprises a central pipe, a torsion-proof ring, a pull rod, an expansion cone, a sealing ring, an elastic claw and a ball seat, wherein an upper reducing section of the central pipe is formed on the outer wall of the head end of the central pipe, an anti-torsion ring expanding section is formed on the outer wall of the central pipe below the upper reducing section of the central pipe, the torsion-proof ring is arranged at the anti-torsion ring expanding section, the inner surface of the torsion-proof ring is matched with the anti-torsion ring expanding section, a sealing reducing section is formed on the outer wall of the central pipe below the anti-torsion ring expanding section, a limiting expanding section is formed on the outer wall of the central pipe below the sealing reducing section and used for positioning the expansion cone so as to ensure the axial position relationship between the central pipe and the expansion cone, an expansion cone reducing section is formed on the outer wall of the central pipe below the limiting expanding section, and the upper part of the expansion cone reducing section is connected with the expansion cone through threads, the sealing ring is arranged on the expansion cone reducing section below the expansion cone, the inner wall of the sealing ring and the outer wall of the expansion cone reducing section form sealing, the tail end outer wall of the central pipe is in threaded connection with the head end inner wall of the elastic claw, a pull rod limiting reducing section is formed on the upper inner wall of the elastic claw, the inner diameter of the pull rod limiting reducing section is smaller than the maximum outer diameter of the pull rod, an elastic expanding section is formed on the outer wall of the elastic claw below the pull rod limiting reducing section, elastic grooves are uniformly formed on the elastic expanding section to form an elastic claw structure, the tail end inner wall of the elastic claw is connected with the upper outer wall of the ball seat through an opening nail, the upper outer wall of the ball seat forms an opening nail expanding section, and a ball seat positioning expanding section and a ball seat positioning reducing section are formed on the outer wall of the ball seat below the opening nail expanding 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 barrel, a ball seat sealing section is formed on the outer wall of the ball seat below the ball seat positioning reducing section, the ball seat sealing section and the inner wall of the sealing barrel form a sealing structure, the pull rod extends 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 achieve the purpose of matching with the pull rod limiting reducing section, the pull rod and the ball seat are taken out through the central tube, a sealing ball is arranged in the middle of the ball seat, and the sealing ball is matched with the inner wall of the middle of the ball seat so as to achieve the purpose of sealing;
the well-reserving part comprises an expansion pipe, a connecting sleeve and a sealing cylinder, wherein the head end and the tail end of the expansion pipe adopt a primary expansion structure, the lower part of the anti-twist 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, the middle part of the outer wall of the connecting sleeve forms a connecting sleeve diameter-expanding section, the head end inner wall of the connecting sleeve adopts an inclined plane diameter-expanding section so as to facilitate the insertion of a tool, 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 pass through 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, and the upper inner wall of the sealing cylinder forms a sealing cylinder section, the sealing barrel comprises a sealing barrel section and a sealing barrel reducing section, wherein the sealing barrel section is arranged on the inner wall of the sealing barrel below the sealing barrel section, the sealing barrel section and the sealing barrel reducing section are in transition through a sealing barrel inclined plane, and the sealing barrel inclined plane can prevent the ball seat from continuously moving downwards to play a role in positioning so as to limit the maximum moving displacement of the ball seat.
The anti-loosening screw threaded 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 threaded hole to connect the head end of the ball seat with the tail end of the pull rod, so that the connection strength of the ball seat and the pull rod is guaranteed.
The lower part of the diameter-expanding section of the anti-twist ring is provided with a positioning nail groove, the diameter-expanding section of the anti-twist ring and the anti-twist ring are connected into a whole through the positioning nail, and the front end of the positioning nail extends into the positioning nail groove.
Two central pipe O-shaped ring grooves are formed in the side wall of the front end of the expansion cone reducing section, and the first O-shaped ring is installed in the central pipe O-shaped ring groove and sealed with the expansion cone.
The outer wall of the head end of the expansion cone is of a cylindrical tubular structure, spherical expanding sections are formed below the cylindrical tubular structure, and adjacent spherical expanding sections are transited through an inclined plane tangent line.
The opening nail is characterized in that 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 diameter expanding section, the center of the opening nail threaded hole is axially overlapped with the center of the opening nail groove, 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.
A ball seat sealing groove is formed in the ball seat sealing section, and a third O-shaped ring is installed in the ball seat sealing groove.
The anti-rotation expansion pipe comprises an expansion pipe body, and is characterized in that a rectangular key groove is formed in the inner wall of the head end of the expansion pipe body, anti-rotation keys are evenly arranged on the outer wall of the lower portion of each anti-rotation ring and extend into the rectangular key groove, and therefore the purpose that the central pipe, the anti-rotation rings and the expansion pipe rotate according to the same phase angle is achieved.
Seted up 16 connecting screw thread holes on the tail end outer wall of expansion pipe, weekly there are 8, are two rows of distributions from the top down set up twice connecting sleeve O type circle groove on the head end outer wall of connecting sleeve, second O type circle sets up connecting sleeve O type circle inslot the below in connecting sleeve O type circle groove is provided with twice connecting screw concave groove, connecting screw concave groove with connecting screw thread hole one-to-one, the connecting screw runs through the connecting screw thread hole stretches into in the connecting screw concave groove.
The outer wall of the sealing barrel forms a necking section and is in transition through an inclined plane, and the outer wall of the tail end of the sealing barrel is provided with male casing threads so as to achieve the purpose of being connected with a sand control pipe column of a well completion pipe column.
The head end inner wall of center tube adopts oil pipe box or drilling rod box to realize connecting the purpose of construction tubular column, the upper portion inner wall of center tube adopts the latus rectum structure, the internal diameter on upper portion of center tube is greater than the biggest external diameter of pull rod to the pull rod freely moves about in the center tube, the pipe tongs can be beaten to the undergauge section on the center tube, so that be connected with the construction tubular column.
The use method of the expansion suspension packing device capable of checking the packing comprises the following steps:
step 1, setting process:
the suspended packer is lowered to a preset underground position through a drill rod or an oil pipe, if the suspended packer is lifted in a well descending process due to resistance, the lifting force of the central pipe is applied to the elastic claw, namely, a transition inclined plane formed by an elastic diameter expanding section on the outer wall of the elastic claw and a pull rod limiting reducing section on the inner wall of the elastic claw can abut against an inclined angle reducing section of the connecting sleeve, so that all the lifting force is applied to the elastic claw, the expansion cone cannot expand the expansion pipe in advance, then hydraulic pressure is applied to the interior of the central pipe, the hydraulic pressure acts on the sealing ring and the expansion cone, the sealing ring and the expansion cone are forced to have an upward moving trend, meanwhile, under the action of hydraulic pressure, the ball seat is pushed downwards and has a downward moving trend, as the hydraulic pressure value is increased, the opening nail is cut off, the sealing ring and the expansion cone start to move upwards and are also lifted upwards slowly and upwards, and then the central pipe starts to move downwards, when the expansion cone moves to the inclined plane of the sealing cylinder, the ball seat stops moving, the expansion cone starts to expand the expansion pipe along with the continuous rise of the hydraulic value, so that the sealing module on the expansion pipe is attached to the inner wall of the casing pipe to form sealing with the casing pipe, when the expansion cone is instantly protruded from the expansion pipe, the pressure is suddenly changed into 0, the central pipe is stopped to be lifted, and the setting is finished;
step 2, a seal checking process:
continuing to apply hydraulic pressure to the interior of the casing pipe, wherein a sealing module of the expansion pipe is matched and sealed with the casing pipe, and a third O-shaped ring on the outer side of the ball seat is matched and sealed with the inner wall of the sealing cylinder, so that the numerical value of the hydraulic pressure rises, the hydraulic pressure application is stopped, the pressure value does not fall, if the pressure value falls, the situation that the setting is not complete is shown, the process of the step 1 needs to be repeated, if the pressure value does not fall, the setting is complete, and the well leaving process of the well leaving part is carried out;
step 3, the well leaving process of the well leaving part:
after the sealing process is finished, the central tube is lifted continuously, the expansion cone is kept away from the expanded expansion tube, 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 located at the position during setting, when the pull rod limiting reducing section of the elastic claw contacts the pull rod reducing section of the pull rod, the ball seat and the sealing ball move upwards together along with the elastic claw until the well leaving part separated from the well part is lifted continuously, the well leaving part is lifted out of the well mouth finally, the well leaving part is left at the well bottom and hung with the sand control pipe column, the well leaving part becomes a part of a well completion pipe column under the well, namely the well leaving process of the well leaving part is finished.
The invention has the beneficial effects that: the invention can hang the sand control pipe column and seal the annular space 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 discharge capacity is increased or a larger discharge capacity is injected, and the production requirement of an oil field is met; the invention can complete the suspension of the well completion sand control pipe column by one trip of the pipe column, and can carry out seal checking and releasing in the trip of the pipe column so as to ensure the sealing reliability of the invention.
Drawings
FIG. 1 is a schematic structural view of the present invention;
in the figure: 1 is a central tube; 2 is a torsion-proof 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 check nail; 14 is an opening nail; 15 is a ball seat; 16 is a sealing ball; 17 is a sealing cylinder; and 18 is a third O-ring.
For a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.
Detailed Description
The technical solution of the present invention is further illustrated by the following specific examples.
Example one
An expansion suspension packer capable of checking a seal comprises a well retention part and a well leaving part,
the well leaving part comprises a central pipe 1, an anti-twist 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 pipe 1 forms an upper reducing section of the central pipe, the outer wall of the central pipe below the upper reducing section of the central pipe forms an anti-twist ring expanding section, the anti-twist ring 2 is arranged at the anti-twist ring expanding section, the inner surface of the anti-twist ring 2 is matched with the anti-twist ring expanding section, the outer wall of the central pipe 1 below the anti-twist ring expanding section forms a sealing reducing section, the outer wall of the central pipe 1 below the sealing reducing section forms a limiting expanding section, the limiting expanding section is used for positioning the expansion cone 7 to ensure the axial position relation of the central pipe 1 and the expansion cone 7, the outer wall of the central pipe 1 below the limiting expanding section forms an expansion cone reducing section, the upper part of the expansion cone reducing section is connected with the expansion cone 7 through a thread, a sealing ring 8 is arranged on the expansion cone reducing section below the expansion cone 7, the inner wall of the sealing ring 8 and the outer wall of the expansion cone reducing section form sealing, the outer wall of the tail end of the central tube 1 is in threaded connection with the inner wall of the head end of the elastic claw 9, a pull rod limiting reducing section is formed on the inner wall of the upper part of the elastic claw 9, the inner diameter of the pull rod limiting reducing section is smaller than the maximum outer diameter of the pull rod 5, an elastic expanding section is formed on the outer wall of the elastic claw below the pull rod limiting reducing section, elastic grooves are uniformly formed on the elastic expanding section to form the structure of the elastic claw, the inner wall of the tail end of the elastic claw 9 is connected with the outer wall of the upper part of the ball seat 15 through an opening nail 14, an opening nail expanding section is formed on the outer wall of the ball seat 15 below the opening nail expanding section, a ball seat positioning expanding section and a ball seat positioning reducing section are formed on the outer wall of the ball seat 15 from top to bottom, the ball seat positioning expanding section and the ball seat positioning reducing section are in a slope transition, the inclined plane is used for positioning the moving displacement of the ball seat 15 in the sealing barrel 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 barrel 17 form a sealing structure, the pull rod 5 extends into the central tube 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 achieve the purpose of matching with the pull rod limiting reducing section, and further achieve the purpose of taking out the pull rod 5 and the ball seat 15 by using the central tube 1, a 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 of the ball seat 15 so as to achieve the purpose of sealing;
the well-reserving part comprises an expansion pipe 4, a connecting sleeve 12 and a sealing cylinder 17, the head and the tail ends of the expansion pipe 4 adopt a primary expansion structure, the lower part of a torsion-proof 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, the middle part of the outer wall of the connecting sleeve 12 forms a connecting sleeve diameter-expanding section, the head end inner wall of the connecting sleeve 12 adopts an inclined plane diameter-expanding section so as to be convenient for the tool to go in, a smooth cylindrical section is formed on the inner wall of the connecting sleeve 12 below the inclined plane diameter-expanding section, an inclined angle neck section is formed on the inner wall of the connecting sleeve 12 of the smooth cylindrical section, the inner diameter of the inclined angle neck section is smaller than the outer diameter of the elastic claw 9 so as to ensure that the elastic claw 9 can not pass 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 cylinder 17, a sealing cylinder section is formed on the upper inner wall of the sealing cylinder 17, a sealing cylinder section is formed on the sealing cylinder inner wall below the sealing cylinder section, the sealing barrel section passes through the transition of sealing barrel inclined plane with sealing barrel undergauge section, and the sealing barrel inclined plane can prevent that ball seat 15 from continuing to move down, plays the positioning action to the biggest removal displacement of restriction ball seat 15.
Example two
On the basis of the first embodiment, the outer wall of the head end of the ball seat 15 is provided with a locking screw threaded hole, and the locking screw 13 penetrates through the locking screw threaded 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 diameter-expanding section of the anti-twist ring is provided with a positioning nail groove, the diameter-expanding section of the anti-twist ring is connected with the anti-twist ring 2 into a whole through a positioning nail 3, and the front end of the positioning nail 3 extends into the positioning nail groove.
Two central pipe O-shaped ring grooves are formed in the side wall of the front end of the reducing section of the expansion cone, and the first O-shaped ring 6 is installed in the central pipe O-shaped ring grooves and forms sealing with the expansion cone 7.
The outer wall of the head end of the expansion cone 7 is of a cylindrical tubular structure, spherical expanding sections are formed below the cylindrical tubular structure, and adjacent spherical expanding sections are transited through an inclined plane tangent line.
An opening screw threaded hole is formed in the outer wall of the elastic claw 9 below the elastic groove, an opening screw groove is formed in the opening screw diameter expanding section, the center of the opening screw threaded hole and the center of the opening screw groove are axially overlapped, an opening screw 14 penetrates through the opening screw threaded hole and the opening screw groove, and the elastic claw 9 is connected with the ball seat 15.
A ball seat sealing groove is formed in the ball seat sealing section, and a third O-shaped ring 18 is arranged in the ball seat sealing groove.
EXAMPLE III
On the basis of the second embodiment, a rectangular key groove is formed in the inner wall of the head end of the expansion pipe 4, the anti-rotation key is uniformly arranged on the outer wall of the lower portion of the anti-rotation ring 2 and extends into the rectangular key groove, and therefore the purpose that the central pipe 1, the anti-rotation ring 2 and the expansion pipe 4 rotate according to the same phase angle is achieved.
The expansion pipe is characterized in that 16 connecting screw thread holes are formed in the outer wall of the tail end of the expansion pipe 4, 8 connecting screw thread holes are formed in each week, the expansion pipe is distributed in two rows from top to bottom, two connecting sleeve O-shaped ring grooves are formed in the outer wall of the head end of the connecting sleeve 12, the second O-shaped rings 10 are arranged in the connecting sleeve O-shaped ring grooves, two connecting screw concave grooves are formed in the lower portions of the connecting sleeve O-shaped ring grooves, the connecting screw concave grooves correspond to the connecting screw thread holes one by one, and the connecting screws 11 penetrate through the connecting screw thread holes and stretch into the connecting screw concave grooves.
The outer wall of the sealing barrel 17 forms a necking section and is in transition through an inclined plane, and the outer wall of the tail end of the sealing barrel 17 is provided with male casing threads so as to achieve the purpose of being connected with a sand control pipe column of a well completion pipe column.
The head end inner wall of center tube 1 adopts oil pipe box or drilling rod box to realize connecting the purpose of construction tubular column, the upper portion inner wall of center tube 1 adopts the latus rectum structure, and the internal diameter on the upper portion of center tube 1 is greater than the biggest external diameter of pull rod 5, so that pull rod 5 freely moves about in the center tube, and the pipe tongs can be beaten to the undergauge section on the center tube 1, so that be connected with the construction tubular column.
Example four
The use method of the expansion suspension packing device capable of checking the packing comprises the following steps:
step 1, setting process:
the suspended packer is lowered to a preset underground position through a drill rod or an oil pipe, if the suspended packer is lifted in a well descending process due to resistance, the lifting force of the central pipe is applied to the elastic claw, namely, a transition inclined plane formed by an elastic diameter expanding section on the outer wall of the elastic claw and a pull rod limiting reducing section on the inner wall of the elastic claw can abut against an inclined angle reducing section of the connecting sleeve, so that all the lifting force is applied to the elastic claw, the expansion cone cannot expand the expansion pipe in advance, then hydraulic pressure is applied to the interior of the central pipe, the hydraulic pressure acts on the sealing ring and the expansion cone, the sealing ring and the expansion cone are forced to have an upward moving trend, meanwhile, under the action of hydraulic pressure, the ball seat is pushed downwards and has a downward moving trend, as the hydraulic pressure value is increased, the opening nail is cut off, the sealing ring and the expansion cone start to move upwards and are also lifted upwards slowly and upwards, and then the central pipe starts to move downwards, when the expansion cone moves to the inclined plane of the sealing cylinder, the ball seat stops moving, the expansion cone starts to expand the expansion pipe along with the continuous rise of the hydraulic value, so that the sealing module on the expansion pipe is attached to the inner wall of the casing pipe to form sealing with the casing pipe, when the expansion cone is instantly protruded from the expansion pipe, the pressure is suddenly changed into 0, the central pipe is stopped to be lifted, and the setting is finished;
step 2, a seal checking process:
continuing to apply hydraulic pressure to the interior of the casing pipe, wherein a sealing module of the expansion pipe is matched and sealed with the casing pipe, and a third O-shaped ring on the outer side of the ball seat is matched and sealed with the inner wall of the sealing cylinder, so that the numerical value of the hydraulic pressure rises, the hydraulic pressure application is stopped, the pressure value does not fall, if the pressure value falls, the situation that the setting is not complete is shown, the process of the step 1 needs to be repeated, if the pressure value does not fall, the setting is complete, and the well leaving process of the well leaving part is carried out;
step 3, the well leaving process of the well leaving part:
after the sealing process is finished, the central tube is lifted continuously, the expansion cone is kept away from the expanded expansion tube, 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 located at the position during setting, when the pull rod limiting reducing section of the elastic claw contacts the pull rod reducing section of the pull rod, the ball seat and the sealing ball move upwards together along with the elastic claw until the well leaving part separated from the well part is lifted continuously, the well leaving part is lifted out of the well mouth finally, the well leaving part is left at the well bottom and hung with the sand control pipe column, the well leaving part becomes a part of a well completion pipe column under the well, namely the well leaving process of the well leaving part is finished.
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 as 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 "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation. The device may be otherwise oriented (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 present invention has been described in detail, but the above description is only a preferred embodiment of the present invention, and is not to be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (10)
1. The utility model provides an inflation that can test seals hangs packing and separates device which characterized in that: comprises a well-remaining part and a well-leaving part,
the well-leaving part comprises a central pipe, a torsion-proof ring, a pull rod, an expansion cone, a sealing ring, an elastic claw and a ball seat, wherein an upper reducing section of the central pipe is formed on the outer wall of the head end of the central pipe, an anti-torsion ring expanding section is formed on the outer wall of the central pipe below the upper reducing section of the central pipe, the torsion-proof ring is arranged at the anti-torsion ring expanding section, the inner surface of the torsion-proof ring is matched with the anti-torsion ring expanding section, a sealing reducing section is formed on the outer wall of the central pipe below the anti-torsion ring expanding section, a limiting expanding section is formed on the outer wall of the central pipe below the sealing reducing section and used for positioning the expansion cone so as to ensure the axial position relationship between the central pipe and the expansion cone, an expansion cone reducing section is formed on the outer wall of the central pipe below the limiting expanding section, and the upper part of the expansion cone reducing section is connected with the expansion cone through threads, the sealing ring is arranged on the expansion cone reducing section below the expansion cone, the inner wall of the sealing ring and the outer wall of the expansion cone reducing section form sealing, the tail end outer wall of the central pipe is in threaded connection with the head end inner wall of the elastic claw, a pull rod limiting reducing section is formed on the upper inner wall of the elastic claw, the inner diameter of the pull rod limiting reducing section is smaller than the maximum outer diameter of the pull rod, an elastic expanding section is formed on the outer wall of the elastic claw below the pull rod limiting reducing section, elastic grooves are uniformly formed on the elastic expanding section to form an elastic claw structure, the tail end inner wall of the elastic claw is connected with the upper outer wall of the ball seat through an opening nail, the upper outer wall of the ball seat forms an opening nail expanding section, and a ball seat positioning expanding section and a ball seat positioning reducing section are formed on the outer wall of the ball seat below the opening nail expanding 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 barrel, a ball seat sealing section is formed on the outer wall of the ball seat below the ball seat positioning reducing section, the ball seat sealing section and the inner wall of the sealing barrel form a sealing structure, the pull rod extends 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 achieve the purpose of matching with the pull rod limiting reducing section, the pull rod and the ball seat are taken out through the central tube, a sealing ball is arranged in the middle of the ball seat, and the sealing ball is matched with the inner wall of the middle of the ball seat so as to achieve the purpose of sealing;
the well-reserving part comprises an expansion pipe, a connecting sleeve and a sealing cylinder, wherein the head end and the tail end of the expansion pipe adopt a primary expansion structure, the lower part of the anti-twist 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, the middle part of the outer wall of the connecting sleeve forms a connecting sleeve diameter-expanding section, the head end inner wall of the connecting sleeve adopts an inclined plane diameter-expanding section so as to facilitate the insertion of a tool, 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 pass through 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, and the upper inner wall of the sealing cylinder forms a sealing cylinder section, the sealing barrel comprises a sealing barrel section and a sealing barrel reducing section, wherein the sealing barrel section is arranged on the inner wall of the sealing barrel below the sealing barrel section, the sealing barrel section and the sealing barrel reducing section are in transition through a sealing barrel inclined plane, and the sealing barrel inclined plane can prevent the ball seat from continuously moving downwards to play a role in positioning so as to limit the maximum moving displacement of the ball seat.
2. The inflatable suspension packing apparatus capable of seal verification according to claim 1, wherein: the outer wall of the head end of the ball seat is provided with a check screw threaded hole, and a check screw penetrates through the check screw threaded hole to connect the head end of the ball seat with the tail end of the pull rod; the lower part of the anti-twist ring expanding section is provided with a positioning nail groove, the anti-twist ring expanding section and the anti-twist ring are connected into a whole through the positioning nail, and the front end of the positioning nail extends into the positioning nail groove.
3. The expansion hanging packing device capable of checking the seal according to claim 1, characterized in that: two central pipe O-shaped ring grooves are formed in the side wall of the front end of the expansion cone reducing section, and the first O-shaped ring is installed in the central pipe O-shaped ring groove and sealed with the expansion cone.
4. The inflatable suspension packing apparatus capable of seal verification according to claim 1, wherein: the outer wall of the head end of the expansion cone is of a cylindrical tubular structure, spherical expanding sections are formed below the cylindrical tubular structure, and adjacent spherical expanding sections are transited through an inclined plane tangent line.
5. The inflatable suspension packing apparatus capable of seal verification according to claim 1, wherein: the opening nail is characterized in that 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 diameter expanding section, the center of the opening nail threaded hole and the center of the opening nail groove are axially overlapped, 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. The inflatable suspension packing apparatus capable of seal verification according to claim 1, wherein: a ball seat sealing groove is formed in the ball seat sealing section, and a third O-shaped ring is installed in the ball seat sealing groove.
7. The inflatable suspension packing apparatus capable of seal verification according to claim 1, wherein: the expansion pipe is characterized in that a rectangular key groove is 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-rotation ring, and the anti-rotation keys extend into the rectangular key groove.
8. The inflatable suspension packing apparatus capable of seal verification according to claim 1, wherein: seted up 16 connecting screw thread holes on the tail end outer wall of expansion pipe, weekly there are 8, are two rows of distributions from the top down set up twice connecting sleeve O type circle groove on the head end outer wall of connecting sleeve, second O type circle sets up connecting sleeve O type circle inslot the below in connecting sleeve O type circle groove is provided with twice connecting screw concave groove, connecting screw concave groove with connecting screw thread hole one-to-one, the connecting screw runs through the connecting screw thread hole stretches into in the connecting screw concave groove.
9. The inflatable suspension packing apparatus capable of seal verification according to claim 1, wherein: the outer wall of a sealing barrel forms a necking section to through the inclined plane transition, public set of pipe thread has been seted up to the tail end outer wall of a sealing barrel, the head end inner wall of center tube adopts oil pipe box or drilling rod box to realize connecting the purpose of construction tubular column, the upper portion inner wall of center tube adopts the latus rectum structure, the internal diameter on upper portion of center tube is greater than the maximum external diameter of pull rod, so that the pull rod freely moves about in the center tube, the pipe tongs can be beaten to the necking section on the center tube, so that be connected with the construction tubular column.
10. The use method of the expansion suspension packing device capable of checking the packing is characterized in that: the method comprises the following steps:
step 1, setting process:
the suspended packer is lowered to a preset underground position through a drill rod or an oil pipe, if the suspended packer is lifted in a well descending process due to resistance, the lifting force of the central pipe is applied to the elastic claw, namely, a transition inclined plane formed by an elastic diameter expanding section on the outer wall of the elastic claw and a pull rod limiting reducing section on the inner wall of the elastic claw can abut against an inclined angle reducing section of the connecting sleeve, so that all the lifting force is applied to the elastic claw, the expansion cone cannot expand the expansion pipe in advance, then hydraulic pressure is applied to the interior of the central pipe, the hydraulic pressure acts on the sealing ring and the expansion cone, the sealing ring and the expansion cone are forced to have an upward moving trend, meanwhile, under the action of hydraulic pressure, the ball seat is pushed downwards and has a downward moving trend, as the hydraulic pressure value is increased, the opening nail is cut off, the sealing ring and the expansion cone start to move upwards and are also lifted upwards slowly and upwards, and then the central pipe starts to move downwards, when the expansion cone moves to the inclined plane of the sealing cylinder, the ball seat stops moving, the expansion cone starts to expand the expansion pipe along with the continuous rise of the hydraulic value, so that the sealing module on the expansion pipe is attached to the inner wall of the casing pipe to form sealing with the casing pipe, when the expansion cone is instantly protruded from the expansion pipe, the pressure is suddenly changed into 0, the central pipe is stopped to be lifted, and the setting is finished;
step 2, a seal checking process:
continuing to apply hydraulic pressure to the interior of the casing pipe, wherein a sealing module of the expansion pipe is matched and sealed with the casing pipe, and a third O-shaped ring on the outer side of the ball seat is matched and sealed with the inner wall of the sealing cylinder, so that the numerical value of the hydraulic pressure rises, the hydraulic pressure application is stopped, the pressure value does not fall, if the pressure value falls, the situation that the setting is not complete is shown, the process of the step 1 needs to be repeated, if the pressure value does not fall, the setting is complete, and the well leaving process of the well leaving part is carried out;
step 3, the well leaving process of the well leaving part:
after the sealing process is finished, the central tube is lifted continuously, the expansion cone is kept away from the expanded expansion tube, 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 located at the position during setting, when the pull rod limiting reducing section of the elastic claw contacts the pull rod reducing section of the pull rod, the ball seat and the sealing ball move upwards together along with the elastic claw until the well leaving part separated from the well part is lifted continuously, the well leaving part is lifted out of the well mouth finally, the well leaving part is left at the well bottom and hung with the sand control pipe column, the well leaving part becomes a part of a well completion pipe column under the well, namely the well leaving process of the well leaving part is finished.
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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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| CN114458201B (en) | 2023-09-29 |
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