CN218522648U - Metal soluble ball seat - Google Patents
Metal soluble ball seat Download PDFInfo
- Publication number
- CN218522648U CN218522648U CN202123014107.6U CN202123014107U CN218522648U CN 218522648 U CN218522648 U CN 218522648U CN 202123014107 U CN202123014107 U CN 202123014107U CN 218522648 U CN218522648 U CN 218522648U
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- Prior art keywords
- seat
- slip
- ball seat
- conical surface
- ring
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 45
- 239000002184 metal Substances 0.000 title claims abstract description 45
- 238000005336 cracking Methods 0.000 claims abstract description 32
- 230000002093 peripheral effect Effects 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 39
- 238000005299 abrasion Methods 0.000 claims description 11
- 238000010008 shearing Methods 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 4
- 239000003433 contraceptive agent Substances 0.000 claims 1
- 230000002254 contraceptive effect Effects 0.000 claims 1
- 210000000664 rectum Anatomy 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- 239000007788 liquid Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000002195 soluble material Substances 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 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
- 238000010586 diagram Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
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Abstract
The utility model provides a metal soluble ball seat, the rubber tube that does not of its simple structure, length are shorter and big latus rectum behind the fracturing, have ensured that easy dissolving and back flowing back are unobstructed reliable after pressing. It includes: fracturing the soluble spheres; the slip assembly comprises a slip body and a plurality of slip teeth; an upper ball seat; a lower guide seat; a metal expansion seal ring; the pull rod assembly comprises a pull rod body, a baffle seat and a fixed seat; a first through guide hole is formed in the axial center of the upper ball seat, the outer peripheral surface of the middle lower part of the upper ball seat is a first conical surface which is closed downwards, a positioning spigot conical surface is formed on the inner wall of the upper end of the upper ball seat, and the positioning spigot conical surface is used for positioning and assembling the fracturing soluble ball or the fixed seat; the axial center of the slip body is provided with a second through guide hole, a plurality of cracking long grooves are distributed on the periphery of the outer ring of the slip body in a surrounding mode, and one axial end of each cracking long groove penetrates through the slip body while the other axial end of the same does not penetrate through the slip body.
Description
Technical Field
The utility model relates to a technical field of oil field exploitation equipment specifically is a soluble ball seat of metal.
Background
With the continuous deepening of oil exploration and development, the oil field development is gradually changed from conventional oil and gas resources into unconventional oil reservoirs with the characteristics of low permeability, compactness and the like. The used process mainly comprises the steps of modifying the horizontal well stratum by multistage layered fracturing and matching with the multistage clustering perforation bridge plug combined operation technology. The ball seat device and the bridge plug device are used together as a separation plugging device and are widely applied to various types of fracturing operation.
The prior art uses a soluble bridge plug structure, the structure is complex, various components exist, the whole length is long, especially a long rubber cylinder is arranged inside the bridge plug structure, the bridge plug structure is difficult to dissolve and easy to accumulate and block, and the inner diameter of an internal flow passage of the bridge plug structure is small, so that the bridge plug structure is not beneficial to back flow after pressing.
Therefore, a new ball seat is urgently needed to be developed.
Disclosure of Invention
To the problem, the utility model provides a metal soluble ball seat, its simple structure, length are short and big latus rectum take not to have a packing element behind the fracturing, have ensured that the easy dissolving just presses the back to flow back unobstructed reliable.
A metal tees, comprising:
fracturing the soluble spheres;
the slip assembly comprises a slip body and a plurality of slip teeth;
an upper ball seat;
a lower guide seat;
a metal expansion seal ring;
the pull rod assembly comprises a pull rod body, a baffle seat and a fixed seat;
a first through guide hole is formed in the axial center of the upper ball seat, the outer peripheral surface of the middle lower part of the upper ball seat is a first conical surface which is closed downwards, a positioning spigot conical surface is formed on the inner wall of the upper end of the upper ball seat, and the positioning spigot conical surface is used for positioning and assembling the fracturing soluble ball or the fixed seat;
a second through guide hole is formed in the axial center of the slip body, a plurality of cracking long grooves are circumferentially distributed on the outer ring of the slip body, one axial end of each cracking long groove penetrates through the slip body, the other axial end of each cracking long groove does not penetrate through the slip body, a positioning conical surface which is closed from top to bottom is arranged in the through hole of the slip body, the positioning conical surface is arranged by being modeled on the first conical surface, and the outer ring Zhou Jintie of the first conical surface is positioned after the slip body is assembled in place;
a plurality of inner grooves are arranged at intervals on the outer circumference of the slip body, corresponding slip teeth are embedded in the inner grooves, the outer ends of the slip teeth are laterally convex and exposed, and the lateral parts of the slip teeth are used for being occluded with the inner ring wall of the sleeve;
an axial through hole is formed in the center of the lower guide seat, and a shear ring is protruded on the side of the inner annular wall of the axial through hole;
the lower end of the slip body is fixedly connected with the upper end ring surface of the lower guide seat;
the upper end of the pull rod body is fixedly sleeved with the fixed seat, the lower end of the pull rod body is provided with a lower convex baffle seat mounting protrusion, the outer diameter of the baffle seat mounting protrusion is smaller than that of the lower end body of the pull rod body, and the baffle seat mounting protrusion is fixedly sleeved with the baffle seat;
the metal expansion sealing ring is sleeved on the first conical surface of the upper ball seat, the lower part of the metal expansion sealing ring is supported on the upper end annular surface of the slip body, and the outer ring of the metal expansion sealing ring is tightly attached to the inner wall of the sleeve to complete sealing;
before entering the well, the upper end surface of the baffle seat is pressed on the lower surface of the shearing ring, the lower end body of the pull rod body is pressed on the upper surface of the shearing ring, the upper end of the pull rod body penetrates through the first through guide hole and protrudes upwards, and the fixed seat is positioned and installed on the positioning spigot conical surface.
It is further characterized in that:
the periphery of the outer ring of the metal expansion sealing ring is also sleeved with a rubber sealing ring, and the rubber sealing ring plays a role in assisting in sealing the inner wall of the sleeve, so that reliable sealing is ensured;
the first conical surface and the positioning conical surface are provided with matched sawtooth groove locking structures, so that stable and reliable connection is ensured after the assembly is in place;
the pull rod body is connected with the fixed seat in a threaded manner;
the connection between the baffle seat mounting bulge of the pull rod body and the baffle seat is threaded connection;
the lower end of the slip body is provided with a plurality of axial downward convex protrusions, the upper ring surface of the lower guide seat is provided with a plurality of positioning grooves, and the downward convex protrusions are fixedly inserted and positioned in the corresponding positioning grooves;
the cracking long grooves comprise first cracking long grooves and second cracking long grooves, wherein the first cracking long grooves and the second cracking long grooves are arranged from bottom to top, and the first cracking long grooves and the second cracking long grooves are sequentially arranged at intervals in a staggered mode along the circumference;
the periphery of the lower guide seat is provided with a plurality of anti-abrasion bulges, and the outer end points of the anti-abrasion bulges protrude out of the periphery of the lower guide seat, so that the abrasion of other parts of the all-metal soluble ball seat is avoided in the well entering process;
the periphery of the lower part of the lower guide seat is a guide conical surface which is closed from top to bottom, so that quick and efficient alignment of installation is ensured;
the slip teeth are embedded in the inner grooves of the slip body in an interference fit mode, and the slip teeth are guaranteed to be installed stably and reliably.
After adopting the structure of the utility model, before entering the well, the slips assembly, the upper ball seat, the lower guide seat, the metal expansion sealing ring and the pull rod assembly are assembled, the upper end of the pull rod assembly is connected with the cable setting tool, the whole tool string is pumped to the underground design position through the cable, the setting tool is started, the pull rod assembly is subjected to upward pulling force, the lower guide seat is driven by the shear ring, the slips assembly and the metal expansion sealing ring move upwards, meanwhile, the upper ball seat is subjected to downward pushing force to push the upper ball seat and other assemblies at the lower part to move relatively, when reaching the design stroke, the metal expansion sealing ring is attached and sealed with the inner part of the sleeve at the periphery, the slips on the slips assembly are engaged and fixed with the inner part of the sleeve, when continuing to apply force, after reaching the shear value of the shear ring, the shear ring is broken, the pull rod assembly is separated from the soluble ball seat and is taken out of the well mouth upwards, the soluble ball is put into the well from the well mouth, the soluble ball seat is sent to the positioning spigot conical surface of the upper ball seat through the pump pressure, the slips assembly, the lower ball seat, the lower guide seat, the soluble metal expansion sealing ring is plugged, thereby realizing the fracturing sealing process of the soluble metal expansion sealing ring, thereby realizing the fracturing process of the outer ring; when the perforation and the fracturing are finished, the whole soluble ball seat is soaked in the liquid at the bottom of the well, and the material of the soluble ball seat is all soluble material, so that the soluble ball seat can be discharged back to the ground along with the liquid after a certain period of time; the fracturing packer is simple in structure, short in length and large in drift diameter after fracturing, and does not have a rubber cylinder, so that the easy dissolution is ensured, and smooth and reliable backflow after fracturing is ensured.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention assembled in place and positioned downhole;
FIG. 2 is a front view structural schematic diagram of FIG. 1;
FIG. 3 is a schematic cross-sectional view of the present invention before sealing in a well;
the names corresponding to the sequence numbers in the figure are as follows:
the slip-type slip joint comprises a fracturing soluble ball 10, a slip assembly 20, a slip body 21, slip teeth 22, a second through guide hole 23, a positioning conical surface 24, an inner groove 25, a lower convex protrusion 26, a first cracking long groove 27, a second cracking long groove 28, an upper ball seat 30, a first through guide hole 31, a first conical surface 32, a positioning spigot conical surface 33, a stopping step 331, a lower guide seat 40, an axial through hole 41, a shearing ring 42, an anti-abrasion protrusion 43, a guide conical surface 44, a positioning groove 45, a metal expansion sealing ring 50, a rubber sealing ring 51, a pull rod assembly 60, a pull rod body 61, a stopping seat 62, a fixing seat 63, a stopping seat mounting protrusion 64 and a sawtooth groove locking structure 70.
Detailed Description
A metal soluble ball seat, see fig. 1-3, comprising:
fracturing the soluble spheres 10;
the slip assembly 20 comprises a slip body 21 and a plurality of slip teeth 22;
an upper ball seat 30;
a lower guide seat 40;
a metallic expansion seal ring 50;
a pull rod assembly 60, which comprises a pull rod body 61, a baffle seat 62 and a fixed seat 63;
a first through guide hole 31 is formed in the axial center of the upper ball seat 30, the outer peripheral surface of the middle lower part of the upper ball seat 30 is a first tapered surface 32 which is closed downwards, a positioning spigot conical surface 33 is formed on the inner wall of the upper end of the upper ball seat 30, and the positioning spigot conical surface 33 is used for positioning and assembling the fracturing soluble ball 10 or the fixed seat 63;
a second through guide hole 23 is formed in the axial center of the slip body 21, a plurality of cracking long grooves are circumferentially distributed on the outer ring of the slip body 21, one axial end of each cracking long groove penetrates through the slip body, the other axial end of each cracking long groove does not penetrate through the slip body, a positioning conical surface 24 which is closed from top to bottom is arranged in the through hole 23 of the slip body 21, the positioning conical surface 24 is arranged by being copied on the first conical surface 32, and after the slip body is assembled in place, the outer ring of the first conical surface 32 is closely attached to the positioning conical surface 24 for positioning;
a plurality of inner grooves 25 are arranged at intervals on the outer circumference of the slip body 21, corresponding slip teeth 22 are embedded in the inner grooves 25, the outer ends of the slip teeth 22 are laterally protruded and exposed, and the lateral parts of the slip teeth 22 are used for being meshed with the inner ring wall of a casing (not shown in the figure, not in the patent protection structure, belonging to the existing mature structure); in specific implementation, the slip teeth 22 are clamped and pressed in a plurality of circles arranged in the height direction, and an annular interval is reserved between every two adjacent slip teeth 22 in each circle of slip teeth, so that stable and reliable engagement with a sleeve is ensured;
an axial through hole 41 is formed in the center of the lower guide seat 40, a shear ring 42 is protruded from the inner annular wall side of the axial through hole 41, and the shear ring 42 is a structure which is broken when the stress is larger than the shear force;
the lower end of the slip body 21 is fixedly connected with the upper end ring surface of the lower guide seat 40;
the upper end of the pull rod body 61 is fixedly sleeved with a fixed seat 63, the lower end of the pull rod body 61 is provided with a lower convex baffle seat mounting bulge 64, the outer diameter of the baffle seat mounting bulge 64 is smaller than the outer diameter of the lower end body of the pull rod body 61, and the baffle seat mounting bulge 64 is fixedly sleeved with a baffle seat 62;
the metal expansion sealing ring 50 is sleeved on the first conical surface 32 of the upper ball seat 30, the lower part of the metal expansion sealing ring is supported on the upper end annular surface of the slip body 21, and the outer ring of the metal expansion sealing ring 50 is tightly attached to the inner wall of the casing to complete sealing;
before entering the well, the upper end surface of the baffle seat 62 is pressed and attached to the lower surface of the shear ring 42, the lower end body of the pull rod body 61 is pressed and attached to the upper surface of the shear ring 42, the upper end of the pull rod body 61 penetrates through the first through guide hole 31 and protrudes upwards, and the fixed seat 63 is fixedly installed on the positioning spigot conical surface 33.
In a preferred embodiment of the present invention,
the outer circumference of the metal expansion sealing ring 50 is also sleeved with a rubber sealing ring 51, and the rubber sealing ring 51 plays a role of assisting in sealing the inner wall of the sleeve, so that reliable sealing is ensured;
the first conical surface 32 and the positioning conical surface 24 are provided with matched sawtooth groove locking and attaching structures 70, so that stable and reliable connection is ensured after the assembly is in place;
the pull rod body 61 is in threaded connection with the fixed seat 63; the connection between the baffle seat mounting bulge 64 of the pull rod body 61 and the baffle seat 62 is threaded, so that the pull rod assembly can be quickly disassembled and assembled and can be recycled;
the lower end of the slip body 21 is provided with a plurality of axial downward convex protrusions 26, the upper ring surface of the lower guide seat 40 is provided with a plurality of positioning grooves 45, and the downward convex protrusions 26 are fixedly inserted and positioned in the corresponding positioning grooves 45.
In the specific implementation:
the cracking long grooves comprise first cracking long grooves 27 arranged from bottom to top and second cracking long grooves 28 arranged from top to bottom, and the first cracking long grooves 27 and the second cracking long grooves 28 are sequentially arranged in a staggered mode at equal intervals along the circumference; when the slip body 21 runs upwards along the outer conical surface of the upper ball seat 30, the expansion effect of the whole outer ring is better, so that the slip teeth 22 embedded on the slip body 21 are better engaged with the inside of the casing;
the periphery of the lower guide seat 40 is provided with a plurality of anti-abrasion protrusions 43, the outer end points of the anti-abrasion protrusions 43 protrude out of the periphery of the lower guide seat 40, so that the abrasion of other parts of the all-metal soluble ball seat is avoided in the well entering process, and the anti-abrasion protrusions 43 are a plurality of ceramic particles which are arranged on the periphery of the lower guide seat in a dotted manner;
the periphery of the lower part of the lower guide seat 40 is a guide conical surface 44 which is closed from top to bottom, so that quick and efficient alignment of installation is ensured;
the slip teeth 22 are embedded in the inner grooves of the slip body 21 in an interference fit mode, and stable and reliable installation of the slip teeth is guaranteed.
In the specific implementation process, before entering the well, namely before sealing, the fixing seat is fixed and limited at the stopping step 331 of the positioning spigot conical surface 33, so that an internal channel of the all-metal soluble ball seat is blocked, and a part of sand is prevented from entering the soluble ball seat in the well entering process, so that the separation resistance of the pull rod assembly 60 and the soluble ball seat is not increased.
In specific implementation, the materials of the fracturing soluble ball 10, the slip body 21, the upper ball seat 30, the lower guide seat 40 and the metal expansion sealing ring 50 are soluble magnesium-based alloys; the slip teeth 22 and the anti-abrasion protrusions 43 are made of ceramic particles, and compared with metal particles, the slip teeth are light in weight and small in damage to the interior of the casing.
The working principle is as follows: before entering a well, assembling a slip assembly, an upper ball seat, a lower guide seat, a metal expansion sealing ring and a pull rod assembly, connecting the upper end of the pull rod assembly with a cable setting tool, pumping the whole tool string to a downhole design position through a cable, starting the setting tool, enabling the pull rod assembly to be subjected to upward tension, driving the lower guide seat, the slip assembly and the metal expansion sealing ring to move upwards through a shear ring, pushing the upper ball seat to be subjected to downward thrust to push the upper ball seat and other assemblies at the lower part to move relatively, enabling the metal expansion sealing ring to be attached and sealed with the inside of a casing at the periphery when reaching a design stroke, enabling slip teeth on the slip assembly to be meshed and fixed with the inside of the casing, breaking the shear ring after reaching the shear value of the shear ring, disconnecting the pull rod assembly from a soluble bridge seat and being taken out of the well mouth upwards, putting a fractured soluble ball into the well from the well mouth, conveying the fractured soluble ball to a positioning stop port of the upper ball seat through a pump pressure, plugging an internal channel formed by the slip assembly, the upper ball seat, the lower guide seat, the soluble ball seat and sealing ring, and realizing other fracturing procedures of the outer ring;
dissolving: when the perforation and the fracturing are finished, the whole soluble ball seat is soaked in the liquid at the bottom of the well, and the material of the soluble ball seat is all soluble material, so that the soluble ball seat can be discharged back to the ground along with the liquid after a certain period of time.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. A metal soluble ball seat, comprising:
fracturing the soluble balls;
the slip assembly comprises a slip body and a plurality of slip teeth;
an upper ball seat;
a lower guide seat;
a metal expansion seal ring;
the pull rod assembly comprises a pull rod body, a baffle seat and a fixed seat;
a first through guide hole is formed in the axial center of the upper ball seat, the outer peripheral surface of the middle lower portion of the upper ball seat is a first conical surface which is closed downwards, and a positioning spigot conical surface is formed on the inner wall of the upper end of the upper ball seat and used for positioning and assembling the fracturing soluble ball or the fixed seat;
a second through guide hole is formed in the axial center of the slip body, a plurality of cracking long grooves are circumferentially distributed on the outer ring of the slip body, one axial end of each cracking long groove penetrates through the slip body, the other axial end of each cracking long groove does not penetrate through the slip body, a positioning conical surface which is closed from top to bottom is arranged in the through hole of the slip body, the positioning conical surface is arranged by being modeled on the first conical surface, and the outer ring Zhou Jintie of the first conical surface is positioned after the slip body is assembled in place;
a plurality of inner grooves are arranged at intervals on the outer circumference of the slip body, corresponding slip teeth are embedded in the inner grooves, the outer ends of the slip teeth are laterally convex and exposed, and the lateral parts of the slip teeth are used for being occluded with the inner ring wall of the sleeve;
an axial through hole is formed in the center of the lower guide seat, and a shear ring is protruded on the side of the inner annular wall of the axial through hole;
the lower end of the slip body is fixedly connected with the upper end ring surface of the lower guide seat;
the upper end of the pull rod body is fixedly sleeved with the fixed seat, the lower end of the pull rod body is provided with a lower convex baffle seat mounting protrusion, the outer diameter of the baffle seat mounting protrusion is smaller than that of the lower end body of the pull rod body, and the baffle seat mounting protrusion is fixedly sleeved with the baffle seat;
the metal expansion sealing ring is sleeved on the first conical surface of the upper ball seat, the lower part of the metal expansion sealing ring is supported on the upper end annular surface of the slip body, and the outer ring of the metal expansion sealing ring is tightly attached to the inner wall of the sleeve to complete sealing;
before entering the well, the upper end surface of the baffle seat is pressed on the lower surface of the shearing ring, the lower end body of the pull rod body is pressed on the upper surface of the shearing ring, the upper end of the pull rod body penetrates through the first through guide hole and protrudes upwards, and the fixed seat is positioned and installed on the positioning spigot conical surface.
2. A metal soluble ball seat as claimed in claim 1, wherein: and a rubber sealing ring is sleeved on the periphery of the outer ring of the metal expansion sealing ring.
3. A metal tees as claimed in claim 1, wherein: the first conical surface and the positioning conical surface are provided with matched sawtooth groove locking structures.
4. A metal soluble ball seat as claimed in claim 1, wherein: the pull rod body is connected with the fixed seat in a threaded manner.
5. A metal tees as claimed in claim 1, wherein: the connection of the baffle seat installation bulge of the pull rod body and the baffle seat is threaded connection.
6. A metal soluble ball seat as claimed in claim 1, wherein: the lower extreme of slips body is provided with a plurality of axial bulge downwards, the face of fitting with a contraceptive ring of lower part guide holder is provided with a plurality of positioning groove, the bulge downwards inserts admittedly and is positioned in the corresponding positioning groove.
7. A metal soluble ball seat as claimed in claim 1, wherein: the cracking long grooves comprise first cracking long grooves and second cracking long grooves, wherein the first cracking long grooves and the second cracking long grooves are arranged from bottom to top, and the first cracking long grooves and the second cracking long grooves are sequentially arranged at intervals in a staggered mode along the circumference.
8. A metal tees as claimed in claim 1, wherein: the periphery of the lower guide seat is provided with a plurality of anti-abrasion bulges, and the outer end points of the anti-abrasion bulges protrude out of the periphery of the outer ring of the lower guide seat.
9. A metal soluble ball seat as claimed in claim 1, wherein: the periphery of the lower part of the lower guide seat is a guide conical surface which is closed from top to bottom.
10. A metal soluble ball seat as claimed in claim 1, wherein: the slip teeth are embedded in the inner grooves of the slip body in an interference fit mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123014107.6U CN218522648U (en) | 2021-12-02 | 2021-12-02 | Metal soluble ball seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123014107.6U CN218522648U (en) | 2021-12-02 | 2021-12-02 | Metal soluble ball seat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218522648U true CN218522648U (en) | 2023-02-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123014107.6U Active CN218522648U (en) | 2021-12-02 | 2021-12-02 | Metal soluble ball seat |
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| CN (1) | CN218522648U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114016951A (en) * | 2021-12-02 | 2022-02-08 | 国仪石油技术(无锡)有限公司 | Metal soluble ball seat |
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2021
- 2021-12-02 CN CN202123014107.6U patent/CN218522648U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114016951A (en) * | 2021-12-02 | 2022-02-08 | 国仪石油技术(无锡)有限公司 | Metal soluble ball seat |
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