CN112901113A - Full soluble fracturing bridge plug with novel structure - Google Patents
Full soluble fracturing bridge plug with novel structure Download PDFInfo
- Publication number
- CN112901113A CN112901113A CN202110045222.5A CN202110045222A CN112901113A CN 112901113 A CN112901113 A CN 112901113A CN 202110045222 A CN202110045222 A CN 202110045222A CN 112901113 A CN112901113 A CN 112901113A
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- slip
- ring
- bridge plug
- cone
- shear ring
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- 239000002245 particle Substances 0.000 claims abstract description 18
- 238000007789 sealing Methods 0.000 claims abstract description 15
- 239000002184 metal Substances 0.000 claims abstract description 9
- 229910052751 metal Inorganic materials 0.000 claims abstract description 9
- 210000000078 claw Anatomy 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 238000004873 anchoring Methods 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 2
- 229910000797 Ultra-high-strength steel Inorganic materials 0.000 claims 1
- 230000002457 bidirectional effect Effects 0.000 abstract description 5
- 239000012530 fluid Substances 0.000 abstract description 3
- 238000004090 dissolution Methods 0.000 description 9
- 238000010276 construction Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000004381 surface treatment Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000002609 medium Substances 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012738 dissolution medium Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003721 gunpowder Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
- E21B33/134—Bridging plugs
-
- 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
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/10—Slips; Spiders ; Catching devices
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a full-soluble bridge plug with a novel structure, belonging to a bidirectional locking single-slip full-soluble bridge plug. The sealing assembly and the slip female cone are sleeved on the conical surface of the male cone; the sealing assembly comprises a wedge-shaped rubber cylinder, a rubber pad and a metal ring; the slip female cone is of a radial elastic claw structure, 1-3 rectangular ring grooves are formed in the outer portion of the slip female cone, and a plurality of slip particles are assembled in the ring grooves to form a slip ring; the male cone and the slip female cone are respectively provided with male and female ratchets, when in setting, the male and female ratchets are tightly meshed into a whole, the tooth tips of the slip ring are all bitten into the inner wall of the sleeve, and the bridge plug is bidirectionally locked on the inner wall of the sleeve. The bridge plug can be dissolved by fracturing flowback fluid or oil-gas layer well fluid, has small volume and stronger applicability, and improves the fracturing well completion efficiency.
Description
Technical Field
The invention belongs to downhole tools in the field of oil and gas exploration and development, and particularly relates to a full-soluble fracturing bridge plug with a novel structure.
Background
In the process of oil and gas development, particularly in the development process of unconventional oil and gas, compact oil and gas, low-permeability oil and gas and the like, a large number of multi-stage staged fracturing technologies with perforating gun-bridge plug combined action are adopted, the fracturing bridge plug is used as an isolation tool between each stage of construction, the fracturing bridge plug mostly adopts a composite drillable bridge plug at present, the bridge plug drilling operation is required, and the cost is high; in recent years, dissolvable bridge plugs appear, and drilling-free bridge plugs can be theoretically realized, but the current application situation is as follows: after multistage fracturing is accomplished to a well, still need clear up and bore the stopper, bore and remove undissolved bridge stopper, single undissolved bridge stopper bores and removes time more than compound bridge stopper, consequently, the soluble bridge stopper of current metal still exists not enoughly, the main performance is: (1) the site is mostly double-slip soluble bridge plugs, the dissolution time is long, more dissolving plaster is generated, the undissolved metal surface is easily pasted, the electrochemical reaction of well fluid and the metal surface is blocked, and the dissolution is slow or even insoluble; (2) the material is selected improperly or a good surface treatment technology is not provided, so that the situation that the material is partially dissolved or even completely dissolved without construction is caused; (3) in terms of anchoring, there are two main forms of existing soluble bridge plugs: one is that the slip-free soluble bridge plug is anchored by the friction between the nickel alloy coated on the slip body and the sleeve, and the anchoring mode is not firm in setting and is only suitable for the condition of a low-pressure new well; the other one is that the ceramic or hard alloy cylindrical block is obliquely arranged as a slip tooth, when the slip is anchored with a casing, point contact stress is generated, the tooth is easy to break, the phenomena of incapability of setting or setting slippage and the like can be caused, and slip particles are insoluble and nonmagnetic and cannot be salvaged by using a magnetic fishing tool; (4) the existing single-slips soluble bridge plug also has the advantages of longer overall length, no bidirectional blocking function, incomplete dissolution function hidden danger and safety hidden danger of being reversely pushed out of a shaft; (5) the existing single-slip soluble bridge plug setting is mostly that the shear pins cut off the setting, the cut shear pins sometimes cause the well-set bridge plug to be unsealed again, and the reliability is low. In summary, in addition to the above problems, the existing soluble bridge plug has many problems such as short holding time, slow dissolution or too fast dissolution, limited temperature application range, low reliability, and high cost.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to develop a novel fully soluble fracturing bridge plug which is more applicable and reliable, and is mainly used for multi-stage fracturing of perforating gun-bridge plug combination.
In order to achieve the purpose, through long-term research and experiments, the invention adopts the following technical scheme: the full soluble fracturing bridge plug with novel structure is a bidirectional locked single-slip full soluble bridge plug, and comprises a male cone, a sealing component, a screw, a slip female cone, a slip ring, a shear ring pressing cap, a base, a shear ring seat, a soluble ball and the like. The sealing assembly and the slip female cone are sequentially sleeved on the conical surface of the male cone, the slip female cone is of a radial elastic claw structure, and an inner conical hole is tightly attached to the outer conical surface of the male cone; the small head section of the male cone and the small head section of the inner conical surface of the female cone of the slip are respectively provided with a male ratchet and a female ratchet, when the slip is set, the female cone of the slip is radially opened, and the male ratchet and the female ratchet of the slip are meshed with each other to be locked into a whole; the square groove at the lower end of the slips female cone is engaged with the upper-shaped boss of the base; the screw is connected with the slips female cone and the slips male cone; one end of the shear ring pressing cap is connected with the base, and the other end of the shear ring pressing cap is connected with the slips female cone; a shear ring and a shear ring seat are arranged between the base and the shear ring; the slips ring is formed by assembling a plurality of slips particles in a rectangular ring groove on the outer cylindrical surface of a slips female cone, and when the slips ring is transversely seen, the tooth point of the slips ring is an arc line and is engaged with the whole line of the inner wall of the sleeve when being anchored. In the parts, the slip ring and the shear ring seat are made of insoluble high-quality steel, the rubber part in the sealing assembly is made of soluble rubber, and the rest parts are made of soluble metal materials; the dissolution time can be controlled for a particular dissolution medium by material selection and surface treatment. In order to cooperate the setting tool to construct, the technical scheme also comprises a soluble bridge plug setting accessory: the center pull rod, the locking torsion spring, the push cylinder and the like are also provided with adapter joints aiming at some setting tools.
The invention has the beneficial effects that: the whole length of the bridge plug is less than 50 percent of the existing bidirectional bridge plug and 70-80 percent of the existing single-slip bridge plug, the structure is small and exquisite, the dissolution is more efficient, and the cost is lower; compared with the existing single-slip soluble bridge plug, the unique structure of the invention can realize the bidirectional anchoring of the single slip, thereby increasing the construction safety; compared with the common soluble bridge plug, the unique slip design is a technological leap, the local stress is reduced by times, the tooth breaking phenomenon of point contact slips is eliminated, the bearing capacity is increased, the stress condition of the slips is greatly improved, the reliability is enhanced, and the soluble bridge plug is suitable for higher operation pressure; the slip particles can be attracted by the magnets, so that a strong magnetic fisher can be configured to fish the slip particles out in the cleaning process of the continuous oil pipe, and various hidden dangers caused by the fact that the existing soluble bridge plug ceramic slip particles cannot be discharged out of a shaft are eliminated without increasing the cost; the unique shearing and setting structure ensures that no downhole residue is left after the shearing ring is sheared off, and further improves the reliability of the invention. By selecting materials and surface treatments with different dissolution characteristics for a particular medium, including a clear water medium, the dissolution rhythm can be controlled at any time between 24 hours and 15 days.
The invention is not limited to the multi-stage fracturing construction of perforating gun-bridge plug combined operation, and can also be used for other underground operations; the unique slip ring structure can be used as a slip part on a double-slip soluble bridge plug, a soluble packer and a composite bridge plug, and can also be used as a slip part of other downhole tools.
The invention is further illustrated with reference to the following figures and examples.
Drawings
FIG. 1 is an overall schematic representation of a soluble bridge plug of the present invention; FIG. 2 is a schematic view of a slip ring triangle profile.
Detailed Description
Referring to fig. 1, the left end of the diagram is defined as the upper end of the soluble bridge plug of the present scheme. The invention relates to a full soluble fracturing bridge plug with a novel structure, which comprises a male cone 1, a sealing component 2, a screw 3, a slip female cone 4, a slip ring 5, a shear ring pressure cap 6, a base 7, a shear ring 8, a shear ring seat 9, a soluble ball 10 and the like. In order to cooperate with a setting tool for construction, the invention is provided with accessories comprising a central pull rod 11, a locking torsion spring 12 and a push cylinder 13, and some setting tools need to be provided with an adapter between the central pull rod 11 and the setting tool.
The male cone 1 is a part with an external conical surface 102 and an internal conical surface 101 of the ball seat, and the conical angle of the external conical surface is 16-24 degrees; the ball seat inner conical surface 101 is arranged on the inner surface of the upper end of the male cone 1, the inner conical angle is 50-70 degrees, and the ball seat inner conical surface is used for seating the soluble ball 10 during setting; the small end section of the outer conical surface of the male cone 1 is provided with a male ratchet 103 which can be meshed with the female ratchet 41 on the slip female cone 4 into a whole after being seated and sealed and keeps a locking state.
The slip female cone 4 is an elastic claw mechanism which can be radially opened, a plurality of longitudinal gaps are uniformly cut from two ends of the slip female cone, and the roots of the longitudinal gaps are not cut off; the rear end of the base is provided with 8-10 evenly distributed end square grooves 43 which are positioned in the middle of a gap 44 cut from the rear end and are occluded and installed with a square boss 71 at the upper end of the base 7; the outer cylindrical surface of the slip female cone 4 is provided with 1-3 rectangular ring grooves 45 for installing slip particles 51; the inner taper angle of the slips female cone 4 is equal to the taper angle of the outer taper surface of the male cone 1, the small end section of the inner taper surface is provided with a female ratchet 41, and the female ratchet is meshed with a male ratchet 103 of the male cone 1 after setting; the lower end of the inner hole of the slips female cone is provided with an annular clamping groove 42 which can clamp the boss 61 at the upper end of the shear ring pressing cap 6 during installation.
The slip ring 5 is of a unique design, is formed by splicing a plurality of slip particles 51 in a rectangular ring groove 45 on a slip female cone 4, and can be provided with 1-3 groups of slip rings 5; the cross section of the slip particles 51 is a rectangular profile in an axial sectional view, and 2-3 triangular saw teeth 52 are arranged outside the slip particles; as shown in FIG. 2, the slip tooth angle is 70-90 degrees, the front angle is 10-45 degrees, and the rear angle is 45-70 degrees; when the slip ring is transversely seen, the sawtooth tip of the slip ring 5 is arc-shaped, and when the slip ring is sealed and anchored, the sawtooth tip can be in full line contact with and bite into the inner wall of the sleeve, so that the local stress is reduced by times, the tooth breakage phenomenon of the point contact slip is eliminated, and the stress condition is greatly superior to that of the point contact obliquely-installed cylindrical slip particles; slips granule 51 is made with super high strength steel, and easily is held by magnet, and after the slips female cone dissolved, slips ring 5 automatically dispersed into insoluble little slips granule 51, except that the part is circulated out of the well, the well can be fished out by strong magnetism to the remaining part.
The sealing assembly 2 is formed by superposing a soluble wedge-shaped rubber cylinder 21, a soluble rubber gasket 22 and a metal gasket ring 23; the wedge-shaped rubber cylinder 21 is wedge-shaped and cylindrical; the inner part of the sealing component 2 is cone-shaped, the outer cone angle of the male cone is equal to the outer cone angle of the male cone, the sealing component is mounted in a fitting mode, and the metal backing ring 23 is mounted close to the upper end of the slip female cone 4; during setting, the seal assembly 2 can expand radially along the outer conical surface 102 of the male cone 1 until it is firmly clamped between the well casing, the male cone 1 and the slip female cone 4.
The lower end of the base 7 is designed into a large-size inclined chamfer 73, so that tools can go into a well conveniently; 8-10 square bosses 71 are uniformly distributed at the upper end of the base 7 and can be arranged in the square groove 43 at the lower end of the slips female cone 4; the inclined plane of the upper end of the base 7 is equal to the inclined angle of the lower end surface of the slips female cone; the lower end face of the base is provided with 1 square notch 72.
The shear ring pressing cap 6, the shear ring 8 and the shear ring seat 9 form a shear ring assembly; the shear ring 8 is a metal ring sleeved on the shear ring seat 9 and is pressed in the base 7 by the shear ring pressing cap 6; the outer part of the upper end of the shear ring pressing cap 6 is provided with a bulge 61 which can be clamped into an inner groove 42 at the lower end of the slip female cone 4 for installation; the shear ring seat 9 is a steel piece and can not be dissolved, and after setting is finished, the shear ring seat and the residual part of the shear ring 8 can be pulled out of a shaft along with the central pull rod.
The main operation of the invention is as follows: before going down the well, the push cylinder 13 is connected with the setting tool outer pipe, the lower end of the central pull rod 11 is connected with the shear ring seat 9, and then the upper end of the central pull rod is sleeved with the locking torsion spring 12 and connected with the setting tool inner pipe, namely the whole fully soluble bridge plug is connected. After the well is drilled to a preset position, the setting mechanism carries out gunpowder combustion operation or hydraulic operation, the push cylinder 13 pushes the male cone 1 of the soluble bridge plug to move downwards, the central pull rod 11 pulls the shear ring seat 9, the base 7 and the like to move upwards, the slip female cone 4 and the sealing assembly 2 are driven to move upwards and radially open, the slip ring 5 is anchored, the sealing assembly 2 is set, the shear ring 8 is cut off, and the releasing operation is completed. After the perforating operation is completed, the fracturing operation can be performed by dropping the soluble balls 10.
Claims (9)
1. The utility model provides a totally soluble bridging plug of novel structure, belongs to the totally soluble bridging plug of two-way dead single slips of locking, includes parts such as public awl, seal assembly, screw, slips box cone, slips ring, shear ring pressure cap, base, shear ring seat, soluble ball and constitute. The sealing assembly and the slip female cone are sleeved on the conical surface of the male cone; the upper end surface of the slip female cone is tightly attached to the sealing assembly, the inner taper hole is tightly attached to the outer conical surface of the male cone, and the lower square groove is meshed with the square boss on the base; the screw is connected with the slip female cone and the slip male cone; the slip ring is formed by splicing a plurality of slip particles in a rectangular ring groove on a slip female cone; the upper end of the shear ring pressing cap is connected with the bayonet of the slip female cone, and a shear ring is pressed between the lower end of the shear ring pressing cap and the base; the shear ring is arranged on the shear ring seat. The slip ring and shear ring seat are made of insoluble high-grade steel, the rubber member in the seal assembly is made of soluble rubber, and the rest parts are made of soluble metal materials.
2. The fully soluble bridge plug of novel structure as claimed in claim 1, wherein said male cone is a part whose outer surface is conical surface and whose upper end is internally conical surface of ball seat; the taper angle of the outer conical surface is 16-24 degrees, and the small head section is provided with a male ratchet; the taper angle of the inner conical surface of the upper end ball seat is 50-70 degrees.
3. The fully soluble bridge plug with a novel structure as claimed in claim 1, wherein the slip female cone is an elastic claw mechanism which can be radially expanded, a plurality of longitudinal slits are uniformly cut from two ends of the slip female cone, and the root parts of the longitudinal slits are not cut; 1-3 rectangular ring grooves for installing slip particles are formed in the outer cylindrical surface of the slip pipe; the small head section of the inner conical surface is provided with a female ratchet; the rear end is provided with 8-10 evenly distributed end square grooves, and the lower end of the inner hole is provided with an annular clamping groove.
4. The fully soluble bridge plug of novel structure as claimed in claim 1, wherein: the slip ring is formed by splicing a plurality of slip particles in a rectangular ring groove on a slip female cone, and 1-3 groups of slip rings can be arranged; the section of the slip particles is a rectangular profile, 2-3 triangular saw teeth are arranged outside the slip particles, the tooth form angle of the slip particles is 70-90 degrees, the front angle is 10-45 degrees, and the rear angle is 45-70 degrees; when viewed transversely, the saw tooth point of the slip ring is arc-shaped, and can be in full line contact with and bite into the inner wall of the sleeve when setting and anchoring. The slip particles are made of ultra-high strength steel and are easily attracted by magnets.
5. The fully soluble bridge plug with the novel structure as claimed in claim 1, wherein the sealing assembly is composed of a wedge-shaped rubber cylinder, a rubber pad and a metal backing ring which are overlapped in sequence, and the wedge-shaped rubber cylinder is wedge-shaped and cylindrical; the wedge-shaped rubber cylinder and the rubber pad are made of soluble rubber; the inner part of the sealing component 2 is conical and has the same conical angle with the outer conical surface of the male cone.
6. The fully soluble bridge plug with the novel structure as claimed in claim 1, wherein the bevel of the upper end of the base is equal to the bevel of the lower end face of the slips female cone, and 8-10 square bosses are uniformly arranged on the bevel; the lower end is provided with 1 square notch.
7. The fully soluble bridge plug with the novel structure as claimed in claim 1, wherein the shear ring pressing cap, the shear ring and the shear ring seat form a shear ring assembly; the shear ring is a metal circular ring sleeved on the shear ring seat, and a shear ring pressing cap is pressed in the base; the outer part of the upper end of the shear ring pressing cap is provided with a bulge; the shear ring seat is a steel piece, can not be dissolved, and can be taken out of a shaft together with the residual part of the shear ring along with the central pull rod.
8. The fully soluble bridge plug with the novel structure as claimed in claim 1, wherein the fully soluble bridge plug with the novel structure comprises a central pull rod, a push cylinder, a locking torsion spring and other accessories to assist the fully soluble bridge plug in realizing setting operation, and the lower end of the central pull rod is connected with the shear ring seat.
9. The fully soluble bridge plug of novel structure as claimed in claim 1, wherein said slip ring structure is used as a slip component for other downhole tools such as bi-directional soluble bridge plugs, soluble packers, composite bridge plugs, etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110045222.5A CN112901113A (en) | 2021-01-06 | 2021-01-06 | Full soluble fracturing bridge plug with novel structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110045222.5A CN112901113A (en) | 2021-01-06 | 2021-01-06 | Full soluble fracturing bridge plug with novel structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112901113A true CN112901113A (en) | 2021-06-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110045222.5A Pending CN112901113A (en) | 2021-01-06 | 2021-01-06 | Full soluble fracturing bridge plug with novel structure |
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| Country | Link |
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| CN (1) | CN112901113A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113216899A (en) * | 2021-06-07 | 2021-08-06 | 大庆市晟威机械制造有限公司 | High-pressure-resistant soluble bridge plug |
| CN114016951A (en) * | 2021-12-02 | 2022-02-08 | 国仪石油技术(无锡)有限公司 | Metal soluble ball seat |
| CN114809981A (en) * | 2022-05-03 | 2022-07-29 | 西南石油大学 | Novel soluble ball seat structure suitable for unconventional oil and gas exploitation |
| CN114941514A (en) * | 2022-06-10 | 2022-08-26 | 西南石油大学 | Split type soluble ball seat structure suitable for volume fracturing is used |
| WO2023097570A1 (en) * | 2021-12-01 | 2023-06-08 | 成都英诺思科技有限公司 | Fracturing device and fracturing method for preset ball |
| CN117684912A (en) * | 2024-01-24 | 2024-03-12 | 西安方元能源工程有限责任公司 | Soluble reverse bridge plug |
-
2021
- 2021-01-06 CN CN202110045222.5A patent/CN112901113A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113216899A (en) * | 2021-06-07 | 2021-08-06 | 大庆市晟威机械制造有限公司 | High-pressure-resistant soluble bridge plug |
| CN113216899B (en) * | 2021-06-07 | 2021-11-16 | 大庆市晟威机械制造有限公司 | High-pressure-resistant soluble bridge plug |
| WO2023097570A1 (en) * | 2021-12-01 | 2023-06-08 | 成都英诺思科技有限公司 | Fracturing device and fracturing method for preset ball |
| CN114016951A (en) * | 2021-12-02 | 2022-02-08 | 国仪石油技术(无锡)有限公司 | Metal soluble ball seat |
| CN114809981A (en) * | 2022-05-03 | 2022-07-29 | 西南石油大学 | Novel soluble ball seat structure suitable for unconventional oil and gas exploitation |
| CN114809981B (en) * | 2022-05-03 | 2024-03-15 | 西南石油大学 | Novel soluble ball seat structure suitable for unconventional oil and gas exploitation |
| CN114941514A (en) * | 2022-06-10 | 2022-08-26 | 西南石油大学 | Split type soluble ball seat structure suitable for volume fracturing is used |
| CN114941514B (en) * | 2022-06-10 | 2023-07-21 | 西南石油大学 | Split type soluble ball seat structure suitable for volume fracturing |
| CN117684912A (en) * | 2024-01-24 | 2024-03-12 | 西安方元能源工程有限责任公司 | Soluble reverse bridge plug |
| CN117684912B (en) * | 2024-01-24 | 2024-05-31 | 西安方元能源工程有限责任公司 | Soluble reverse bridge plug |
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