CN211950434U - Large-drift-diameter fracturing bridge plug - Google Patents
Large-drift-diameter fracturing bridge plug Download PDFInfo
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- CN211950434U CN211950434U CN202020258479.XU CN202020258479U CN211950434U CN 211950434 U CN211950434 U CN 211950434U CN 202020258479 U CN202020258479 U CN 202020258479U CN 211950434 U CN211950434 U CN 211950434U
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Abstract
The utility model provides a big latus rectum fracturing bridging plug relates to oil exploration equipment technical field, including center tube, guide shoe subassembly, slips subassembly, seal assembly and locking subassembly, at the removal in-process, the utility model discloses a seal assembly among the bridging plug receives extrusion and wall of a well sealing contact, slips subassembly and wall of a well contact, and the position of locking bridging plug prevents the seal assembly resilience in order to make sealed more reliable, and the locking subassembly can prevent seal assembly rearward movement, and under the effect of locking structure, the guide shoe subassembly prevents the slips and removes forward, and this bridging plug characteristics are little external diameter, big latus rectum to easily go into the well, the later stage of being convenient for is reformed transform.
Description
Technical Field
The utility model relates to an oil exploration equipment technical field especially relates to a big latus rectum fracturing bridging plug.
Background
With the continuous deepening of oil exploration and development and the continuous increase of unconventional oil and gas reservoirs with low permeability, low porosity and the like, a conventional vertical well can not meet the development requirement at present, a horizontal well gradually becomes a necessary means for improving the comprehensive benefit of oil field exploration and development, and the horizontal well has the advantages of large oil drainage area, high single well yield, large penetration degree, high reserve utilization degree, capability of effectively avoiding obstacles and harsh environment zones and the like, and becomes the focus of people in the scientific research and practice of the oil industry.
The bridge plug clustering perforation combined-staged fracturing technology is widely used at present, has the advantages of one-time pipe column operation, no staged limitation, simple tool pipe column structure, smooth shaft and the like, and is increasingly widely applied as one of important tools for staged fracturing. At present, the conventional bridge plug comprises a drillable bridge plug, a soluble bridge plug and the like, the drillable bridge plug is drilled and ground by a drilling tool after fracturing is finished, in a horizontal well, the gravity of the drilling tool can not provide drilling pressure, a hydraulic shock tool is required to provide the drilling pressure, the conventional cast iron bridge plug needs longer drilling and grinding time, the soluble bridge plug is in practical use, most of the soluble bridge plug has unstable transformation process performance, the dissolubility in the later transformation period exists, the dissolution rate has uncertainty, a small number of the soluble bridge plug still needs continuous oil pipe plug sweeping operation, and the operation cost and the operation period are increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that overcome exist among the prior art not enough, provide a big latus rectum fracturing bridging plug, this fracturing bridging plug is little external diameter, big latus rectum to easily go into the well, the later stage of being convenient for is reformed transform.
The utility model discloses a realize through following technical scheme: the utility model provides a big latus rectum fracturing bridge plug, including the center tube, the guide shoe subassembly, the slips subassembly, sealing component and locking subassembly connect gradually and the cover is established on the center tube after to in the past, the guide shoe subassembly includes the lower retaining ring of being connected with the center tube outside and sets up the guide shoe in the retaining ring outside down, be equipped with the locking structure down between retaining ring and the center tube, the retaining ring moves along the center tube axial under the restriction of locking structure, the slips subassembly includes the slips that centrum and multiunit are located the centrum outside, the slips is connected with centrum slope, the tip of slips supports the guide shoe, locking subassembly extrusion sealing component seals the well.
In the moving process, the utility model discloses a seal assembly among the bridging plug receives extrusion and wall of a well sealing contact, slips subassembly and wall of a well contact, the position of locking bridging plug, in order to make sealed more reliable, prevent that seal assembly kick-backs, the locking subassembly can prevent seal assembly rebound, under the effect of locking structure, the guide shoe subassembly prevents the slips and moves down, this bridging plug characteristics are little external diameter, big latus rectum to easily go into the well, the later stage of being convenient for is reformed transform.
According to the above technical solution, preferably, the locking structure is a backstop tooth provided on a contact surface of the lower lock ring and the central tube, so that the lower lock ring can only slide backwards in one direction, and simultaneously the lower lock ring is prevented from sliding forwards.
According to the technical scheme, preferably, the sealing assembly comprises a rubber cylinder and two groups of back ring units which are respectively connected with two ends of the rubber cylinder, each back ring unit comprises an inner back ring, a middle back ring and an outer back ring, the middle back ring is a C-shaped ring, the outer back ring on the outer side of the middle back ring is also a C-shaped ring, the middle back ring and the outer back ring are matched in a convex-concave mode, and the opening positions of the double C-shaped structures form 180 degrees with each other, so that the outer diameters of the middle back ring and the outer back ring can be radially enlarged and gaps can be radially complemented; one of them outer back of the body ring is connected with the locking subassembly, the outer back of the body ring and the centrum of another back of the body ring unit contact, the inboard of back of the body ring including the both ends of packing element are pegged graft, interior back of the body ring is pegged graft in the inboard of well back of the body ring, interior back of the body ring is fixed diameter, can restrict the radial removal in packing element both ends, well back of the body ring is the C ring, in packing element compression process, well back of the body ring cooperation outer back of the body ring struts the laminating to the wall of a well, can prevent effectively that the packing element axial from being extruded, the length of packing element is longer, laminate with the wall of a well after the compression, form big annular empty sealing, finally realize the two.
The rotation prevention can be realized through the boss between the inner back ring and the outer back ring, the inner back ring and the outer back ring are staggered by 180 degrees, and when the locking ring sleeve is axially extruded, the radial expansion of the inner back ring and the outer back ring can be realized, so that the inner back ring and the outer back ring are in contact with the sleeve wall.
According to the technical scheme, the central pipe is preferably made of P110-grade alloy steel, and the locking assembly, the cone body, the anchoring assembly and the like except the central pipe are made of ductile iron materials which have the characteristics of good mechanical property, excellent corrosion resistance, good extensibility and the like.
According to the technical scheme, preferably, the cone body is in threaded connection with the central pipe, the cone body is matched with the inclined surface of the outer back ring through the conical surface, and the cone body is in sliding connection with the slip assembly.
According to the technical scheme, preferably, the middle of the rubber cylinder is provided with the rubber cylinder inner ring, and the sealing ring is arranged between the rubber cylinder inner ring and the central pipe.
According to the above technical solution, preferably, the locking assembly includes an upper locking ring connected to the outer side of the rear portion of the center tube and a locking ring sleeve disposed on the outer side of the upper locking ring, the locking ring sleeve is inserted to the outer side of the outer back ring, the upper locking ring can move in a single direction along the axial direction of the center tube toward the front side, the locking ring sleeve moves down to drive the upper locking ring to push the back ring unit to squeeze the rubber tube, and when the rubber tube is squeezed in place, when the rubber tube rebounds after the locking ring sleeve removes the force, the upper locking ring contacts with the center tube to stop.
According to the technical scheme, preferably, a locking structure is arranged between the locking ring and the central tube and used for preventing the upper locking ring from moving backwards along the axial direction of the central tube, and the locking structure can also adopt the backstop teeth.
According to the technical scheme, the outer side of the cone body is preferably provided with a forward inclined plane, the slip assembly is matched with the cone body through the inclined plane, and the angle range of the inclined plane is 5-25 degrees.
According to the technical scheme, preferably, the locking ring is in threaded connection with the guide shoe, the upper locking ring is also in threaded connection with the locking ring sleeve, the threaded connection has a certain gap, the gap is larger than the height of the stopping teeth of the locking ring, when the locking ring sleeve pushes the back ring unit and the rubber cylinder to move downwards, the rubber cylinder is extruded and attached to the well wall, due to the fact that the gap is formed between the upper locking ring and the locking ring sleeve, the upper locking ring can move on the stopping teeth, and when the rubber cylinder rebounds to push the locking ring sleeve upwards, the upper locking ring can limit the locking ring sleeve to move upwards through threads.
The utility model has the advantages that: in the moving process, the utility model discloses a seal assembly among the bridging plug receives extrusion and wall of a well sealing contact, slips subassembly and wall of a well contact, the position of locking bridging plug, in order to make sealed more reliable, prevent that seal assembly kick-backs, the locking subassembly can prevent seal assembly rearward movement, under the effect of locking structure, the guide shoe subassembly prevents the slips and moves forward, and this bridging plug characteristics are little external diameter, big latus rectum to easily go into the well, the later stage of being convenient for is reformed transform.
Drawings
Fig. 1 shows a schematic structural diagram of a bridge plug according to an embodiment of the present invention.
Fig. 2 shows a schematic structural diagram of a bridge plug setting connected with a connection adapter according to an embodiment of the present invention.
Fig. 3 shows a schematic structural diagram of bridge plug setting according to an embodiment of the present invention.
Fig. 4 shows a detailed structure diagram of a part a in fig. 3.
Fig. 5 shows a detailed structure diagram of a part B in fig. 3.
In the figure: 1. a central tube; 2. a guide shoe assembly; 3. a slip assembly; 4. a seal assembly; 5. a locking assembly; 6. a lower lock ring; 7. guiding a shoe; 8. a locking structure; 9. a vertebral body; 10. slips; 11. stopping teeth; 12. a back ring unit; 13. an inner dorsal loop; 14. a middle dorsal loop; 15. an outer dorsal loop; 16. a rubber cylinder; 17. an upper lock ring; 18. a lock ring sleeve; 19. and an inner ring of the rubber cylinder.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and preferred embodiments.
As shown in the figure, the utility model provides a large-drift-diameter fracturing bridge plug, including center tube 1, guide shoe subassembly 2, slips subassembly 3, seal assembly 4 and locking assembly 5 connect gradually from front to back and cover on center tube 1, guide shoe subassembly 2 includes lower lock ring 6 connected with the outside of center tube 1 and guide shoe 7 arranged outside lower lock ring 6, be equipped with locking structure 8 between lower lock ring 6 and center tube 1, locking structure 8 restricts lower lock ring 6 and moves forward along center tube 1 axial, slips subassembly 3 includes centrum 9 and a plurality of groups of slips 10 located outside centrum 9, slips 10 and centrum 9 are connected in an inclined manner, the tip of slips 10 supports guide shoe 7, locking assembly 5 extrudes seal assembly 4 to seal the well, center tube 1 adopts P110-grade alloy steel material, the locking component 5, the cone 9, the anchoring component and the like except the central pipe 1 are made of ductile iron materials, and the ductile iron materials have the characteristics of good mechanical property, excellent corrosion resistance, good extensibility and the like.
According to the above technical solution, preferably, the locking structure 8 is a backstop tooth 11 arranged on the contact surface of the lower lock ring 6 and the central tube 1, so that the lower lock ring 6 can only slide backwards in one direction, and simultaneously the lower lock ring 6 is prevented from sliding forwards.
According to the above technical solution, preferably, the sealing assembly 4 includes a rubber cylinder 16 and two sets of back ring units 12 respectively connected to two ends of the rubber cylinder 16, each back ring unit 12 includes an inner back ring 13, a middle back ring 14 and an outer back ring 15, the middle back ring 14 is a C-shaped ring, the outer back ring 15 outside the middle back ring 14 is also a C-shaped ring, the middle back ring 14 and the outer back ring 15 are matched in a convex-concave manner, and the opening positions of the double C-shaped structures form 180 ° with each other, so that after an axial force is applied, both the two can radially expand the outer diameter and can radially complement the gap; one of the outer back rings 15 is connected with the locking assembly 5, the outer back ring 15 of the other back ring unit 12 is in contact with the vertebral body 9, two ends of the rubber cylinder 16 are connected with the inner side of the inner back ring 13 in an inserting mode, the inner back ring 13 is connected with the inner side of the middle back ring 14 in an inserting mode, the inner back ring 13 is of a fixed diameter and can limit the two ends of the rubber cylinder 16 to move along the radial direction, the middle back ring 14 is a C-shaped ring, in the compression process of the rubber cylinder 16, the middle back ring 14 is matched with the outer back ring 15 to be propped and attached to the well wall, the rubber cylinder 16 can be effectively prevented from being extruded axially, the length of the rubber cylinder 16 is long, the rubber cylinder is attached to the well wall after being compressed, large annular hollow seal is formed.
The rotation prevention between the inner back ring 13 and the outer back ring 15 can be realized through a boss, the double C-shaped rings of the inner back ring 13 and the outer back ring 15 are staggered by 180 degrees, when the locking ring sleeve 18 is axially extruded, the radial expansion of the inner back ring 13 and the outer back ring 15 can be realized, and the inner back ring 13 and the outer back ring 15 are in contact with the sleeve wall.
According to the technical scheme, preferably, the cone 9 is in threaded connection with the central tube 1, the cone 9 is matched with the inclined surface of the outer back ring 15 through a conical surface, and the cone 9 is in sliding connection with the slip assembly 3.
According to the above technical solution, preferably, a rubber sleeve inner ring 19 is arranged in the middle of the rubber sleeve 16, and a sealing ring is arranged between the rubber sleeve inner ring 19 and the central tube 1.
According to the above technical solution, preferably, the locking assembly 5 comprises an upper locking ring 17 connected with the outer side of the rear portion of the center tube 1 and a locking ring sleeve 18 arranged on the outer side of the upper locking ring 17, the locking ring sleeve 18 is inserted on the outer side of the outer back ring 15, the upper locking ring 17 can move in a single direction along the axial direction of the center tube 1 to the front side, the locking ring sleeve 18 moves downwards to drive the upper locking ring 17 to push the back ring unit 12 to squeeze the rubber sleeve 16, and when the rubber sleeve 16 is squeezed in place, when the rubber sleeve 16 rebounds after the locking ring sleeve 18 removes force, the upper locking ring 17 contacts the center tube 1 to prevent the rubber.
According to the above technical solution, preferably, a locking structure 8 is also arranged between the locking ring and the central tube 1, the locking structure 8 prevents the upper locking ring 17 from moving backwards along the axial direction of the central tube 1, and here, the locking structure 8 can also adopt the backstop teeth 11.
According to the technical scheme, preferably, the outer side of the cone 9 is a forward inclined plane, the slip assembly 3 is matched with the cone 9 through the inclined plane, the angle range of the inclined plane is 5-25 degrees, and the cone 9, the slip 10 and the inner wall of the casing can realize self locking.
According to the technical scheme, preferably, the lower lock ring is in threaded connection with the guide shoe 7, the upper lock ring 17 is in threaded connection with the lock ring sleeve 18, the threaded connection has a certain gap, the gap is larger than the height of the backstop teeth 11 of the lock ring, when the lock ring sleeve 18 pushes the back ring unit 12 and the rubber sleeve 16 to move downwards, the rubber sleeve 16 is squeezed and attached to the well wall, due to the fact that the gap is formed between the upper lock ring 17 and the lock ring sleeve 18, the upper lock ring 17 can move on the backstop teeth 11, and when the rubber sleeve 16 rebounds and pushes the lock ring sleeve 18 upwards, the upper lock ring 17 can limit the lock ring sleeve 18 to move backwards through the threads.
Furthermore, the cone 9 is in threaded connection with the central pipe 1, so that the rubber cylinder 16 can be simultaneously set and the slip 10 can be anchored in a bidirectional limiting manner, and in operation, the force of the central pipe 1 can be directly transmitted to the slip 10.
The utility model has the advantages that: in the moving process, the utility model discloses a sealing assembly 4 among the bridging plug receives extrusion and wall of a well sealing contact, slips subassembly 3 and wall of a well contact, the position of locking bridging plug, it is more reliable in order to make sealed, prevent that sealing assembly 4 kick-backs, locking subassembly 5 can prevent sealing assembly 4 rearward movement, under the effect of locking structure 8, guide shoe subassembly 2 prevents slips 10 forward movement, this bridging plug characteristics are little external diameter, big latus rectum to easily go into the well, the later stage of being convenient for is reformed transform.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a large-bore fracturing bridge plug, its characterized in that, includes center tube, guide shoe subassembly, slips subassembly, seal assembly and locking subassembly connect gradually and the cover is established after to in the past on the center tube, the guide shoe subassembly includes the lower catch that is connected with the center tube outside and sets up the guide shoe in the catch outside down, down the catch with be equipped with the locking structure between the center tube, the restriction of locking structure the catch is followed down the center tube axial is moved forward, the slips subassembly includes centrum and the multiunit slips that is located the centrum outside, slips and centrum slope are connected, the tip of slips supports the guide shoe, locking subassembly extrusion seal assembly seals the well.
2. The large-bore fracturing bridge plug of claim 1, wherein the locking structure is a backstop tooth provided on the contact surface of the lower lock ring and the base pipe.
3. The large-drift-diameter fracturing bridge plug according to claim 2, wherein the sealing assembly comprises a rubber tube and two sets of back ring units respectively connected with two ends of the rubber tube, each back ring unit comprises an inner back ring, a middle back ring and an outer back ring, the middle back ring is a C-shaped ring, the outer back ring outside the middle back ring is also a C-shaped ring, the middle back ring and the outer back rings are matched in a convex-concave mode, one outer back ring is connected with the locking assembly, the outer back ring of the other back ring unit is in contact with a vertebral body, two ends of the rubber tube are inserted into the inner side of the inner back ring, and the inner back ring is inserted into the inner side of the middle back ring.
4. A large-bore fracture bridge plug as claimed in claim 3, wherein the base pipe is made of P110 grade alloy steel material.
5. The large-drift-diameter fracturing bridge plug as claimed in claim 4, wherein the cone body is in threaded connection with the central pipe, the cone body is matched with the inclined surface of the outer back ring through a conical surface, and the cone body is in sliding connection with the slip assembly.
6. The large-drift-diameter fracturing bridge plug as claimed in claim 5, wherein a rubber cylinder inner ring is arranged in the middle of the rubber cylinder, and a sealing ring is arranged between the rubber cylinder inner ring and the central pipe.
7. The large-bore fracturing bridge plug of claim 6, wherein the locking assembly comprises an upper lock ring connected to the outside of the rear portion of the base pipe and a lock ring sleeve disposed outside the upper lock ring, the lock ring sleeve being inserted outside the outer back ring, the upper lock ring being movable in one direction along the axial direction of the base pipe toward the front side.
8. A large-bore fracturing bridge plug according to claim 7, wherein a locking structure is also provided between the locking ring and the base pipe, the locking structure preventing the upper locking ring from moving axially backwards along the base pipe.
9. The large-drift-diameter fracturing bridge plug as claimed in claim 8, wherein the outside of the cone is a forward inclined plane, the slip assembly and the cone are matched through the inclined plane, and the angle of the inclined plane ranges from 5 degrees to 25 degrees.
10. The large-bore frac bridge plug of claim 9, wherein said lock ring is threadably connected to said guide shoe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020258479.XU CN211950434U (en) | 2020-03-05 | 2020-03-05 | Large-drift-diameter fracturing bridge plug |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020258479.XU CN211950434U (en) | 2020-03-05 | 2020-03-05 | Large-drift-diameter fracturing bridge plug |
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| CN211950434U true CN211950434U (en) | 2020-11-17 |
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| CN202020258479.XU Active CN211950434U (en) | 2020-03-05 | 2020-03-05 | Large-drift-diameter fracturing bridge plug |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112727398A (en) * | 2021-02-05 | 2021-04-30 | 四川捷贝通能源科技有限公司 | Trace rubber sealed soluble bridge plug |
-
2020
- 2020-03-05 CN CN202020258479.XU patent/CN211950434U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112727398A (en) * | 2021-02-05 | 2021-04-30 | 四川捷贝通能源科技有限公司 | Trace rubber sealed soluble bridge plug |
| CN112727398B (en) * | 2021-02-05 | 2022-06-10 | 四川捷贝通能源科技有限公司 | Trace rubber sealed soluble bridge plug |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A large diameter fracturing bridge plug Effective date of registration: 20230721 Granted publication date: 20201117 Pledgee: China Construction Bank Corporation Tianjin Development Branch Pledgor: TIANJIN MATERUI TECHNOLOGY Co.,Ltd. Registration number: Y2023120000068 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |