CN216446890U - Switchable soluble bridge plug - Google Patents
Switchable soluble bridge plug Download PDFInfo
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- CN216446890U CN216446890U CN202122208226.9U CN202122208226U CN216446890U CN 216446890 U CN216446890 U CN 216446890U CN 202122208226 U CN202122208226 U CN 202122208226U CN 216446890 U CN216446890 U CN 216446890U
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Abstract
The utility model relates to the field of petroleum machinery, in particular to a switchable soluble bridge plug. The hydraulic setting tool (A) is connected with the pipe wall of the central pipe (2) through a setting shear pin (3), and the insertion tool (B) is connected with the pipe wall of the central pipe (2) through a releasing shear pin (1); the side of the central pipe (2) close to the setting shear pin (3) comprises a sealing anchoring part which can realize bidirectional anchoring and sealing through compression; a strip-shaped hole (18) is formed in the lower connector (10), when the plugging sliding sleeve (13) is arranged at the upper part, the channel can be closed when the strip-shaped hole of the lower connector (10) is in a closed state, and the friction ring (15) is in a one-way locking state to prevent automatic descending; the lower joint (10) is in threaded connection with a guide head (17), and the guide head (17) is provided with a third sealing ring (16). The purpose of plugging and leakage repairing is achieved, and the channel can be closed to realize plugging after the squeezing and the lifting are completed.
Description
Technical Field
The utility model relates to the field of petroleum machinery, in particular to a switchable soluble bridge plug.
Background
In the development process of an oil field, the stratum reserves of a common oil well at the later stage are reduced, the water pressure of a nearby water injection well is too high in the water injection process, the water flooding original layer extraction degree of the oil well is low, the oil well has potential excavation, and the operation of horizon chemical squeezing or seal layer transformation is required; but the chemical injection agent needs to be injected for waiting solidification in the operation process.
SUMMERY OF THE UTILITY MODEL
The purpose of the utility model is that: specific objects are seen in the several substantial technical effects of the embodied section for providing a more effective switchable soluble bridge plug.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the switchable soluble bridge plug is characterized in that a hydraulic setting tool A and a pipe wall connected with a central pipe 2 through a setting shear pin 3 can push a push ring 4 after the setting shear pin 3 is cut off when the hydraulic setting tool A is pushed to the right; the insertion tool B is connected with the pipe wall of the central pipe 2 through the releasing shear pin 1 and can move towards the right in the central pipe cavity 29 of the central pipe 2; one side of the central pipe 2 close to the setting shear pin 3 comprises a sealing anchoring part, the sealing anchoring part can realize bidirectional anchoring and sealing through compression, and the sealing anchoring part comprises a push ring 4, a slip I5, a cone I6, a protective bowl I7, an edge rubber cylinder I8, a middle rubber cylinder 9, an edge rubber cylinder II 8, a protective bowl II 7, a cone II 6 and a slip II 5 which are sequentially sleeved on the central pipe 2; the hydraulic setting tool A is pushed to the right so as to push the push ring 4, the push ring 4 can push the slips 5, and the slips 5 climb along the cone 6 to slide so as to cause partial breakage of the slips 5 and further extrude the sleeve outwards so as to realize anchoring; the hydraulic setting tool A is pushed to the right, and the side rubber cylinder 8 and the middle rubber cylinder 9 can arch to extrude the sleeve outwards so as to realize internal sealing; the casing is the oil well inner wall or the pipeline attached to the oil well inner wall.
The utility model further adopts the technical scheme that a sealing ring 12 is arranged on the central pipe 2, the central pipe 2 is in threaded connection with the lower joint 10 and is fastened by a screw 11, and then the plugging sliding sleeve 13 can be integrally sealed when closed.
The utility model further has the technical scheme that a strip-shaped hole 18 is formed in the lower connector 10, a plugging sliding sleeve 13 is arranged in the lower connector 10, a sealing ring II 14 and a friction ring 15 are arranged on the plugging sliding sleeve 13, and when the plugging sliding sleeve 13 is arranged at the lower part, the strip-shaped hole 18 of the lower connector 10 is in an open state and can be normally extruded; when the plugging sliding sleeve 13 is on the upper portion, the strip-shaped hole of the lower joint 10 is in a closed state, so that the channel can be closed, and the friction ring 15 is in a one-way locking state and prevents automatic descending.
The utility model further adopts the technical scheme that the lower connector 10 is in threaded connection with the guide head 17, and the guide head 17 is provided with a third sealing ring 16.
The utility model further adopts the technical scheme that a releasing shear pin 1 is arranged on a central pipe 2, and the releasing shear pin 1 is connected with an inserting tool B to achieve the purpose of releasing when the pushing force is greater than the shearing force.
The utility model further adopts the technical scheme that the hydraulic setting tool A comprises an upper joint 31 of a power part of the hydraulic setting tool, the upper joint 31 of the power part of the hydraulic setting tool can be connected with an oil pipe, the upper joint 31 of the power part of the hydraulic setting tool is connected with an outer cylinder 36 of the hydraulic setting tool through threads, the upper joint 31 of the power part of the hydraulic setting tool comprises a circular disc, the middle part of the circular disc extends out of a middle pipe, the end part of the middle pipe is connected with a gear part 37 of the hydraulic setting tool through threads, the circular disc comprises a hydraulic ring hole 32 of the hydraulic setting tool, the right side of the circular disc comprises a piston 34 of the hydraulic setting tool, the middle part of the piston 34 of the hydraulic setting tool is sleeved on the middle pipe extending out of the middle part of the circular disc, a clearance 33 of the piston of the hydraulic setting tool is formed between the piston 34 of the hydraulic setting tool and the circular disc, and the piston 34 of the hydraulic setting tool can be blocked by the gear part 37 of the hydraulic setting tool; the hydraulic setting tool piston 34 is fixedly connected with a hydraulic setting tool piston pushing wall 35, and the hydraulic setting tool piston pushing wall 35 can move integrally along with the piston; the hydraulic setting tool piston pushing wall 35 is connected to the wall of the central tube 2 through the setting shear pin 3.
The utility model further adopts the technical scheme that an inserting tool B can move up and down in a central tube 2, an inserting tube 20 of the inserting tool B continues to move downwards in the central tube, a jaw 21 at the end part of the inserting tube 20 comprises a plurality of sub-jaws, each sub-jaw comprises a jaw head 23, and the jaw head 23 comprises a jaw head inner inclined surface 22 and a jaw head outer inclined surface 24; the jaw head 23 extends into the opening 25 of the plugging sliding sleeve 13, and the inner inclined plane 22 of the jaw head is matched with the inner inclined plane 26 of the plugging sliding sleeve to realize locking; the jaw head 23 can move left and right in the middle of the plugging sliding sleeve 13 to adapt to the left and right movement of the hydraulic setting tool A.
A further solution of the utility model consists in that the outer wall of the adapter structure 19 at the end of the insertion tool B is screwed to the inner wall of the piston pushing wall 35 of the hydraulic setting tool.
The further technical scheme of the utility model is that an upper joint 31 of a power part of a hydraulic setting tool of the hydraulic setting tool A is connected with an oil pipe through threads, when the oil pipe is pulled upwards, the hydraulic setting tool A and an inserting tool B can be pulled to move upwards integrally, further, a plugging sliding sleeve 13 is pulled upwards, a jaw head 23 can be led out of the plugging sliding sleeve 13 through further pulling, and the hydraulic setting tool A and the inserting tool B can be separated from a bridge plug under the condition that a setting shear pin 3 and a releasing shear pin 1 are broken.
The utility model further adopts the technical scheme that the switchable soluble bridge plug main body is made of magnesium-aluminum alloy and can be degraded.
Compared with the prior art, the utility model adopting the technical scheme has the following beneficial effects: this patent connects usually to be connected the back with hydraulic pressure setting instrument A, insert instrument B, transfers preset position through oil pipe, and the setting instrument of suppressing produces thrust, makes the sealed release of switch soluble bridging plug, will annotate the crowded crack, the hole that get into the well section that needs the sealing or get into the stratum of pouring agent through switch soluble bridging plug to reach the purpose of shutoff and mending-leakage, crowded notes are accomplished to lift and can be closed the passageway and realize the shutoff.
Drawings
To further illustrate the present invention, further description is provided below with reference to the accompanying drawings:
FIG. 1 is a schematic diagram of a bridge plug structure;
FIG. 2 is an unset block diagram of a bridge plug and hydraulic setting tool and insertion tool connection;
FIG. 3 is an unset block diagram of a bridge plug and hydraulic setting tool and insertion tool connection;
FIG. 4 is a setting block diagram of a bridge plug and hydraulic setting tool and insertion tool connection;
FIG. 5 is a schematic view of a hydraulic setting tool;
FIG. 6 is a schematic view of the bridge plug seal and after setting;
FIG. 7 is a schematic view of an insertion tool configuration;
FIG. 8 is a schematic structural view of a plugging sliding sleeve;
FIG. 9 is a schematic view of a friction ring structure;
FIG. 10 is a side schematic view of a friction ring structure;
fig. 11 is a partially enlarged view of fig. 10.
Wherein: 1. releasing the shear pin; 2. a central tube; 3. setting the shear pin; 4. a push ring; 5. slips; 6. a cone; 7. protecting a bowl; 8. an edge rubber cylinder; 9. a middle rubber cylinder; 10. a lower joint; 11. tightening the screw; 12. a first sealing ring; 13. plugging the sliding sleeve; 14. a second sealing ring; 15. a friction ring; 16. a third sealing ring; 17. a seeker; 18. a strip-shaped hole; 19. an adaptation structure; 20. inserting a tube; 21. a jaw; 22. an inner inclined plane of the jaw head; 23. a jaw head; 24. an outer inclined plane of the jaw head; 25. plugging the opening of the sliding sleeve; 26. plugging the inner inclined plane of the sliding sleeve; 27. a friction ring opening; 28. a friction ring gear; a central tube cavity 29; 30. releasing the shear pin groove; 31. the hydraulic setting tool power part upper joint; 32. a hydraulic ring hole of a hydraulic setting tool; 33. hydraulic setting tool piston clearance; 34. a hydraulic setting tool piston; 35. the hydraulic setting tool piston pushes the wall; 36. an outer cylinder of the hydraulic setting tool; 37. a hydraulic setting tool gear portion; A. a hydraulic setting tool; B. and inserting the tool.
Detailed Description
The present invention will be further illustrated with reference to the accompanying drawings and specific embodiments, which are to be understood as merely illustrative of the utility model and not as limiting the scope of the utility model. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "top", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The patent provides a plurality of parallel schemes, and different expressions belong to an improved scheme based on a basic scheme or a parallel scheme. Each solution has its own unique features. In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other. The fixing means, which is not described herein, may be any one of screw fixing, bolt fixing, or glue bonding.
Example (b): with reference to all of the accompanying drawings; the switchable soluble bridge plug is characterized in that a hydraulic setting tool A and a pipe wall connected with a central pipe 2 through a setting shear pin 3 can push a push ring 4 after the setting shear pin 3 is cut off when the hydraulic setting tool A is pushed to the right; the insertion tool B is connected with the pipe wall of the central pipe 2 through the releasing shear pin 1 and can move towards the right in the central pipe cavity 29 of the central pipe 2; one side of the central pipe 2 close to the setting shear pin 3 comprises a sealing anchoring part, the sealing anchoring part can realize bidirectional anchoring and sealing through compression, and the sealing anchoring part comprises a push ring 4, a slip I5, a cone I6, a bowl protector I7, an edge rubber cylinder I8, a middle rubber cylinder 9, an edge rubber cylinder II 8, a bowl protector II 7, a cone II 6 and a slip II 5 which are sequentially sleeved on the central pipe 2; the hydraulic setting tool A is pushed to the right so as to push the push ring 4, the push ring 4 can push the slips 5, and the slips 5 climb along the cone 6 to slide so as to cause partial breakage of the slips 5 and further extrude the sleeve outwards so as to realize anchoring; the hydraulic setting tool A is pushed to the right, and the side rubber cylinder 8 and the middle rubber cylinder 9 can arch to extrude the sleeve outwards so as to realize internal sealing; the casing is the oil well inner wall or the pipeline attached to the oil well inner wall. The technical scheme of the utility model has the following substantial technical effects and the realization process: after the structure is placed downhole, it is squeezed from left to right as shown to effect internal sealing and anchoring.
Example two: as a further improvement or a juxtaposition or an alternative independent solution, a sealing ring 12 is mounted on the central tube 2, and the central tube 2 is screwed with the lower joint 10 and is fastened by a screw 11, thereby allowing the sealing slide 13 to be sealed integrally when closed.
Example three: as a further improvement scheme or a parallel scheme or an optional independent scheme, the lower joint 10 is provided with a strip-shaped hole 18, the lower joint 10 is internally provided with a blocking sliding sleeve 13, the blocking sliding sleeve 13 is provided with a sealing ring II 14 and a friction ring 15, and when the blocking sliding sleeve 13 is arranged at the lower part, the strip-shaped hole 18 of the lower joint 10 is in an open state and can be normally extruded and injected; when the plugging sliding sleeve 13 is on the upper portion, the strip-shaped hole of the lower joint 10 is in a closed state, so that the channel can be closed, and the friction ring 15 is in a one-way locking state and prevents automatic descending. The technical scheme of the utility model has the following substantial technical effects and the realization process: the inside of the central tube and the strip-shaped hole 18 can form a passage, and the opening and closing of the passage is the plugging sliding sleeve 13; the access is open at the beginning, and the strip-shaped hole 18 can be closed only by lifting up the plugging sliding sleeve 13.
Example four: as a further development or in parallel or alternatively independently, the lower connector 10 is screwed to a guide head 17, the guide head 17 being equipped with a third sealing ring 16.
Example five: as a further improvement scheme or a parallel scheme or an optional independent scheme, the central tube 2 is provided with the releasing shear pin 1, and the releasing shear pin 1 is connected with the inserting tool B to achieve the releasing purpose when the pushing force is greater than the shearing force.
Example six: as a further improvement scheme or a parallel scheme or an optional independent scheme, the hydraulic setting tool a comprises a hydraulic setting tool power part upper joint 31, the hydraulic setting tool power part upper joint 31 can be connected with an oil pipe, the hydraulic setting tool power part upper joint 31 is connected with a hydraulic setting tool outer cylinder 36 through threads, the hydraulic setting tool power part upper joint 31 internally comprises a disc, a middle pipe extends out of the middle part of the disc, the end part of the middle pipe is connected with a hydraulic setting tool gear part 37 through threads, the disc comprises a hydraulic setting tool hydraulic ring hole 32, the right side of the disc comprises a hydraulic setting tool piston 34, the middle part of the hydraulic setting tool piston 34 is sleeved on the middle pipe extending out of the middle part of the disc, a hydraulic setting tool piston gap 33 is formed between the hydraulic setting tool piston 34 and the disc, and the hydraulic setting tool piston 34 can be blocked by the hydraulic setting tool gear part 37; the hydraulic setting tool piston 34 is fixedly connected with a hydraulic setting tool piston pushing wall 35, and the hydraulic setting tool piston pushing wall 35 can move integrally along with the piston; the hydraulic setting tool piston pushing wall 35 is connected to the wall of the central tube 2 through the setting shear pin 3. The technical scheme of the utility model has the following substantial technical effects and the realization process: referring to fig. 6, the oil pipe is pressed, the hydraulic setting tool piston 34 is pushed along the hydraulic setting tool hydraulic ring hole 32, the hydraulic setting tool piston pushing wall 35 is pushed to move towards the right in a linkage manner, and then the left-to-right extrusion movement described in the embodiment is realized. The hydraulic setting tool gear portion 37 can be limited to avoid moving too much.
Example seven: as a further improvement or in parallel or alternatively independently, the insertion tool B can move up and down inside the central tube 2, the insertion tube 20 of the insertion tool B continues to move down inside the central tube, the jaw 21 at the end of the insertion tube 20 comprises a plurality of sub-jaws, each sub-jaw comprises a jaw head 23, and the jaw head 23 comprises a jaw head inner inclined surface 22 and a jaw head outer inclined surface 24; the jaw head 23 extends into the opening 25 of the plugging sliding sleeve 13, and the inner inclined plane 22 of the jaw head is matched with the inner inclined plane 26 of the plugging sliding sleeve to realize locking; the jaw head 23 can move left and right in the middle of the plugging sliding sleeve 13 to adapt to the left and right movement of the hydraulic setting tool A.
Example eight: as a further development or in a side-by-side or alternatively independent solution, the outer wall of the adapter 19 at the end of the insertion tool B and the inner wall of the piston pushing wall 35 of the hydraulic setting tool are screwed. The technical scheme of the utility model has the following substantial technical effects and the realization process: as a first scheme, the inserting tool B can be also independently disconnected from the piston pushing wall 35 of the hydraulic setting tool, and a telescopic device is arranged in the inserting tool B, so that a channel is not occupied; as a second solution, the insertion tool B can be directly connected to a pipe string or a tubing, and can be pulled and pushed independently.
Example nine: as a further improvement scheme or a parallel scheme or an optional independent scheme, an upper joint 31 of a power part of a hydraulic setting tool of the hydraulic setting tool a is connected with an oil pipe through threads, when the oil pipe is pulled upwards, the hydraulic setting tool a and an insertion tool B can be pulled to move upwards integrally, then the plugging sliding sleeve 13 is pulled upwards, further pulling can enable the jaw head 23 to come out of the plugging sliding sleeve 13, and under the condition that both the setting shear pin 3 and the releasing shear pin 1 are broken, the bridge plug is separated. The technical scheme of the utility model has the following substantial technical effects and the realization process: the hydraulic setting tool a and the insertion tool B can be used multiple times.
Example ten: as a further improvement or in a side-by-side or alternative independent solution, the switchable soluble bridge plug is made of magnesium-aluminum alloy and can be degraded. The technical scheme of the utility model has the following substantial technical effects and the realization process: the degradable metal is commercially available material, and can be purchased. The metal degradation is preferably performed by dissolving potassium chloride with a metal. Other corrosive agents may also be used.
For example, the following components can be referred to: table of soluble metal chemical composition:
the central tube is a hollow central tube;
the hydraulic setting tool A is pushed to the right, the push ring 4 pushes the slips 5, the slips 5 climb along the cone 6, the slips 5 are partially broken, and the sleeve is extruded outwards to realize anchoring; the hydraulic setting tool A is pushed to the right, the edge rubber cylinder 8 and the middle rubber cylinder 9 are arched, and the sleeve is extruded outwards to realize internal sealing; the casing is the inner wall of the oil well or a pipeline attached to the inner wall of the oil well;
the hydraulic setting tool A and the inserting tool B are continuously pushed towards the right, the releasing shear pin 1 is sheared, the releasing is successful, a channel is arranged between the hydraulic setting tool A and the inserting tool B and is a central tube cavity 29, and the medicament can enter the sleeve to work after passing through the central tube cavity 29 and the strip-shaped hole 18, namely waiting for coagulation. The entire device is worked into the formation.
The insertion tool B is inserted into the central tube 2, the insertion tube 20 of the insertion tool B continues to move downwards in the central tube, the clamping jaws 21 at the ends of the insertion tube 20 comprise a plurality of sub-jaws, each sub-jaw comprises a clamping jaw head 23, the clamping jaw heads 23 comprise a clamping jaw head inner inclined surface 22 and a clamping jaw head inner inclined surface 22
Jaw head outer ramps 24; the jaw head 23 extends into the opening 25 of the plugging sliding sleeve 13, and the inner inclined plane 22 of the jaw head is matched with the inner inclined plane 26 of the plugging sliding sleeve to realize locking; the jaw head 23 can move left and right in the middle of the plugging sliding sleeve 13 to adapt to the left and right movement of the hydraulic setting tool A.
Pulling insertion tool B up, friction ring 15 outside contains the friction ring tooth, and the friction ring tooth is the tooth that inclines, and the locking can be realized to the tooth that inclines, and bar hole 18 is blocked.
After the switchable soluble bridge plug is connected with the hydraulic setting tool A and the inserting tool B, the switchable soluble bridge plug is placed to a preset position through an oil pipe, the hydraulic setting tool is pressed to generate thrust, the setting shear pin is cut off, the push ring slip is pushed to break the anchoring sleeve rubber barrel to compress the sealing sleeve, the boosting releasing shear pin is continuously cut off, the switchable soluble bridge plug is enabled to be released, the injection agent is squeezed into a well section needing to be sealed or into cracks and pores of a stratum through the switchable soluble bridge plug to achieve the purposes of plugging and leakage repairing, and the channel can be closed to realize plugging after the squeezing is completed and lifted.
The channel in the sealing sleeve can be anchored to open normal extrusion when construction is needed, the extrusion channel can be closed after construction is finished, and the switchable soluble bridge plug can be automatically degraded after the injection agent is cured, and almost no residue is left after dissolution. The slips and the rubber cylinder of the switchable soluble bridge plug realize the anchoring and sealing of the casing pipe through compression in the construction, and the specific position is according to the construction design requirement.
The switchable soluble bridge plug is mainly used for temporary plugging, chemical squeezing or secondary well cementing operation of oil, gas and water layers, and a pouring agent is squeezed into a well section to be plugged or into cracks and pores of a stratum through the switchable soluble bridge plug so as to achieve plugging and leakage repairing.
In the development process of an oil field, the stratum reserves of a common oil well at the later stage are reduced, the water pressure of a nearby water injection well is too high in the water injection process, the water flooding original layer extraction degree of the oil well is low, the oil well has potential excavation, and the operation of horizon chemical squeezing or seal layer transformation is required; but in the operation process, because the chemical injection agent needs to be injected for waiting coagulation, after the chemical injection agent is connected with a hydraulic setting tool and an inserting tool through a switchable soluble bridge plug, the chemical injection agent is placed to a preset position through an oil pipe, the setting tool is pressed to generate thrust, so that the switchable soluble bridge plug can be used for squeezing and injecting the sealed sleeve annulus, after squeezing and injecting, the switchable soluble bridge plug is released and lifted, and a channel is closed to realize well closing waiting coagulation, and after the chemical injection agent waits coagulation, the switchable soluble bridge plug product body and the sealing part adopt self-degradable metal materials, almost no residue exists after dissolution, a water plugging process is implemented on an old well, and the purposes of water plugging and oil increasing are realized.
As an optional expression:
the soluble material matrix is mainly made of high-strength magnesium-aluminum alloy or high polymer material. The magnesium-aluminum alloy mainly contains magnesium and has low density (about 1.8-2.0 g/cm)3) The composite material has good machining performance, high chemical activity and easy dissolution in a humid environment. The dissolution rate of the magnesium-aluminum alloy is mainly related to the liquid temperature and the concentration of chloride ions, and the higher the temperature is, the faster the dissolution is; the higher the chloride ion concentration, the faster the alloy surface passive film is destroyed, the better the liquid conductivity, and the faster the dissolution rate.
Recommended well entry and construction process
1. C, pipe column descending: speed limiting and drilling down (40-50 pieces/hour), wherein the drilling down should be uniform and stable, violent stop and violent placing, drilling down and drilling sliding are forbidden, the position of the liquid level in the well is judged in advance, the tool should be slowly lowered at a uniform speed when contacting the liquid level, and the tool also needs to be slowly lowered at a uniform speed when passing through a deflecting point, a sleeve is hung and sleeved;
2. setting: after the pipe is lowered to a preset position, respectively pressing 5Mpa, 10Mpa and 15Mpa, stabilizing the pressure for 5 minutes, lifting the pipe column by 5 tons (increasing 5 tons on the basis of the weight of the original pipe column) if the pipe column is not released when the pipe column is pressed to 20Mpa, and continuing pressing until a releasing pin is cut off and the releasing is successful; and continuously increasing the pressure to 25-28MPa, cutting off the pin of the ball seat, and finishing the pressure relief and setting of the lower sliding pipe column of the ball seat.
3. And (4) seal checking: after setting releasing, slowly lowering the pipe column, adding proper drilling pressure (about 2-4T) on the switchable soluble bridge plug by the insertion tool, and pressing the oil pipe to test the sealing for water absorption;
4. according to the construction design, the squeeze operation is started, after the squeeze operation is finished (the squeeze liquid is ensured to completely enter the position below the switchable soluble bridge plug during displacement, and the excess of the displacement liquid is 0.5 square), the device is lifted for about 1 meter relative to the retainer, a channel can be closed (the pressure change of a well head is observed, and the operation of lowering, lifting and closing can be repeatedly carried out if overflow exists), and the device is subjected to reverse circulation well washing to replace the excess slurry in the pipe column.
5. When the switchable soluble bridge plug has no soluble environment, the solvent can be injected into the wellbore to accelerate dissolution; it may be corrosive agent to decompose the metal.
6. After the setting tool is pulled out, the setting tool is immediately cleaned and maintained in time.
Creatively, the above effects exist independently, and the combination of the above results can be completed by a set of structure.
The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to illustrate the principles of the utility model, but that various changes and modifications may be made without departing from the spirit and scope of the utility model, and the utility model is to be limited to the embodiments described above.
Claims (10)
1. The switchable soluble bridge plug is characterized in that a hydraulic setting tool (A) is connected with the pipe wall of a central pipe (2) through a setting shear pin (3), and a push ring (4) can be pushed after the setting shear pin (3) is cut off when the hydraulic setting tool (A) is pushed to the right; the insertion tool (B) is connected with the pipe wall of the central pipe (2) through the releasing shear pin (1) and can move towards the right in the central pipe cavity (29) of the central pipe (2); one side of the central pipe (2) close to the setting shear pin (3) comprises a sealing anchoring part, the sealing anchoring part can realize bidirectional anchoring and sealing through compression, and the sealing anchoring part comprises a push ring (4), a first slip (5), a first cone (6), a first bowl protector (7), a first edge rubber cylinder (8), a middle rubber cylinder (9), a second edge rubber cylinder (8), a second bowl protector (7), a second cone (6) and a second slip (5) which are sequentially sleeved on the central pipe (2); the hydraulic setting tool (A) is pushed to the right so as to push the push ring (4), the push ring (4) can push the slips (5), and the slips (5) climb along the cone (6) to slide so as to cause partial breakage of the slips (5) and further extrude the sleeve outwards to realize anchoring; the hydraulic setting tool (A) is pushed to the right, and the side rubber cylinder (8) and the middle rubber cylinder (9) can arch to extrude the sleeve outwards so as to realize internal sealing; the casing is the oil well inner wall or the pipeline attached to the oil well inner wall.
2. Switchable soluble bridge plug according to claim 1, characterized in that a sealing ring (12) is mounted on the central tube (2), the central tube (2) being screwed to the lower connection (10) and being fastened with screws (11) so as to enable the blocking sleeve (13) to be sealed in its entirety when closed.
3. The switchable soluble bridge plug according to claim 2, characterized in that the lower joint (10) is provided with a strip-shaped hole (18), the lower joint (10) is internally provided with a blocking sliding sleeve (13), the blocking sliding sleeve (13) is provided with a second sealing ring (14) and a friction ring (15), and when the blocking sliding sleeve (13) is arranged at the lower part, the strip-shaped hole (18) of the lower joint (10) is opened to allow normal squeezing; when the plugging sliding sleeve (13) is arranged at the upper part, the strip-shaped hole of the lower joint (10) is in a closed state and can close the channel, and the friction ring (15) is in one-way locking to prevent automatic descending.
4. Switchable soluble bridge plug according to claim 2, characterized in that the lower connection (10) is screwed to the guide head (17), the guide head (17) being equipped with the third sealing ring (16).
5. The switchable soluble bridge plug according to claim 1, wherein the central tube (2) is provided with a releasing shear pin (1), and the releasing shear pin (1) is connected with the insertion tool (B) to achieve the releasing purpose when the pushing force is larger than the shearing force.
6. The switchable soluble bridge plug according to claim 1, wherein the hydraulic setting tool (A) comprises a hydraulic setting tool power part upper joint (31), the hydraulic setting tool power part upper joint (31) is capable of connecting to an oil pipe, the hydraulic setting tool power part upper joint (31) is connected to a hydraulic setting tool outer cylinder (36) through a thread, a disc is arranged inside the hydraulic setting tool power part upper joint (31), a middle pipe extends out of the middle of the disc, the end of the middle pipe is connected to a hydraulic setting tool gear part (37) through a thread, a hydraulic setting tool hydraulic ring hole (32) is arranged on the disc, a hydraulic setting tool piston (34) is arranged on the right side of the disc, the middle part of the hydraulic setting tool piston (34) is sleeved on the middle pipe extending out of the middle of the disc, a hydraulic setting tool piston gap (33) is arranged between the hydraulic setting tool piston (34) and the disc, the hydraulic setting tool piston (34) can be blocked by a hydraulic setting tool gear portion (37); the hydraulic setting tool piston (34) is fixedly connected with a hydraulic setting tool piston pushing wall (35), and the hydraulic setting tool piston pushing wall (35) can move integrally along with the piston; the piston pushing wall (35) of the hydraulic setting tool is connected with the pipe wall of the central pipe (2) through the setting shear pin (3).
7. The switchable soluble bridge plug of claim 1 wherein the insertion tool (B) is movable up and down inside the central tube (2), the insertion tube (20) of the insertion tool (B) continues to move down inside the central tube, the jaws (21) at the end of the insertion tube (20) comprise a plurality of sub-jaws, each sub-jaw comprises a jaw head (23), and the jaw heads (23) comprise a jaw head inner slope (22) and a jaw head outer slope (24); the jaw head (23) extends into the opening part (25) of the plugging sliding sleeve (13), and the inner inclined plane (22) of the jaw head is matched with the inner inclined plane (26) of the plugging sliding sleeve to realize locking; the jaw head (23) can move left and right in the middle of the plugging sliding sleeve (13) to adapt to the left and right movement of the hydraulic setting tool (A).
8. The switchable soluble bridge plug according to claim 7, characterized in that the outer wall of the adapter structure (19) at the end of the insertion tool (B) and the inner wall of the hydraulic setting tool piston pushing wall (35) are screwed.
9. The switchable soluble bridge plug according to claim 6, characterized in that the upper joint (31) of the power part of the hydraulic setting tool (A) is connected with the oil pipe through threads, when the oil pipe is pulled upwards, the hydraulic setting tool (A) and the inserting tool (B) can be pulled to move upwards integrally, the plugging sliding sleeve (13) is pulled upwards, further pulling can enable the jaw head (23) to come out of the plugging sliding sleeve (13), and the separation from the bridge plug is realized under the condition that the setting shear pin (3) and the releasing shear pin (1) are both broken.
10. The switchable soluble bridge plug of claim 6 wherein the switchable soluble bridge plug body is magnesium aluminum alloy capable of degradation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122208226.9U CN216446890U (en) | 2021-09-13 | 2021-09-13 | Switchable soluble bridge plug |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122208226.9U CN216446890U (en) | 2021-09-13 | 2021-09-13 | Switchable soluble bridge plug |
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| CN216446890U true CN216446890U (en) | 2022-05-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116044343A (en) * | 2023-02-20 | 2023-05-02 | 杨帆 | Double-seal single-clamp type soluble degradable quick drilling and extrusion injection process |
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2021
- 2021-09-13 CN CN202122208226.9U patent/CN216446890U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116044343A (en) * | 2023-02-20 | 2023-05-02 | 杨帆 | Double-seal single-clamp type soluble degradable quick drilling and extrusion injection process |
| CN116044343B (en) * | 2023-02-20 | 2024-05-07 | 大庆市亚盛油田技术开发有限公司 | Double-seal single-clamp type soluble degradable quick drilling and extrusion injection process |
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