CN111350472A - Deformable assembly for downhole tool and downhole tool - Google Patents
Deformable assembly for downhole tool and downhole tool Download PDFInfo
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- CN111350472A CN111350472A CN202010344667.9A CN202010344667A CN111350472A CN 111350472 A CN111350472 A CN 111350472A CN 202010344667 A CN202010344667 A CN 202010344667A CN 111350472 A CN111350472 A CN 111350472A
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- deformable
- groove structure
- downhole tool
- spiral groove
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- 239000003566 sealing material Substances 0.000 claims abstract description 45
- 238000000034 method Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 abstract description 18
- 238000010276 construction Methods 0.000 abstract description 2
- 239000003208 petroleum Substances 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 11
- 230000000694 effects Effects 0.000 description 8
- 238000004873 anchoring Methods 0.000 description 4
- 238000012856 packing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/128—Packers; Plugs with a member expanded radially by axial pressure
-
- 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
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (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)
- Gasket Seals (AREA)
Abstract
The invention relates to the field of petroleum underground construction, in particular to a deformable assembly for an underground tool and the underground tool, which comprise a deformable assembly main body, wherein the deformable assembly main body is provided with a deformable part outer surface and a deformable part inner surface, the deformable part inner surface is used for being matched and installed with a mandrel variable surface, at least one circle of complete spiral groove structure is arranged on the outer surface of the deformable part of the deformable assembly main body in the circumferential direction, the depth direction of the spiral groove structure extends from the outer surface of the deformable part to the inner surface of the deformable part, and a sealing material is arranged in the spiral groove structure. At least one circle of complete spiral groove structure is arranged on the circumference of the deformable component main body, so that the surface area of the deformable component main body is increased, the expansion rate of the deformable component main body is improved, and the sealing material is arranged in the spiral groove structure and realizes the sealing with the inner wall of the shaft.
Description
Technical Field
The invention relates to the field of petroleum underground construction, in particular to a deformable component for an underground tool and the underground tool.
Background
At present, shaft packing tools such as bridge plugs, fracturing plugs and the like on the market generally comprise an anchoring assembly, a sealing mechanism and a mandrel which move axially, and when the shaft packing tools are used for underground setting, annular space capable of achieving effective sealing after expansion is limited, and the expansion rate is generally 3% -20%, so that the sealing mechanism is large.
Disclosure of Invention
The invention aims to provide a deformable component for a downhole tool and the downhole tool, and the expansion rate of the deformable component is improved.
The technical scheme for solving the technical problems is as follows: the utility model provides a but, the flexible subassembly for downhole tool, includes flexible subassembly main part, but flexible subassembly main part has a deformation surface and a deformation internal surface, the deformation internal surface is used for becoming the surface fit installation with the dabber, the deformation external surface of flexible subassembly main part upwards is provided with the complete spiral groove structure of at least round in the circumference, the degree of depth direction of spiral groove structure is by a deformation external surface to it extends to warp a internal surface, be provided with the sealing material among the spiral groove structure.
The working principle and the beneficial effects of the invention are as follows: at least one circle of complete spiral groove structure is arranged on the circumference of the deformable component main body, so that the surface area of the deformable component main body is increased, the expansion rate of the deformable component main body is improved, and the sealing material realizes the sealing with the inner wall of the shaft because the spiral groove structure is internally provided with the sealing material; meanwhile, due to the fact that the spiral groove structure is arranged, when the deformable component body is subjected to axial pressure, radial pressure can be generated, extra power is provided for expansion of the deformable component body, and the expansion rate of the deformable component body is further improved. Due to the increased expansion rate of the deformable element body, the deformable element body may be provided as a relatively small volume component, thereby allowing the overall downhole tool to be smaller in volume.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the helical groove structure extends throughout the entire circumference of the deformable assembly body.
The beneficial effect of adopting the further scheme is that: the surface area of the deformable assembly body is further increased due to the helical groove structure extending throughout the entire circumference of the deformable assembly body.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the cross section of the spiral groove structure is of a trapezoid structure, a first bottom edge is arranged on the outer surface of the deformation piece of the trapezoid structure, the other bottom edge of the trapezoid structure is a second bottom edge, and the length of the first bottom edge is larger than that of the second bottom edge.
The beneficial effect of adopting the further scheme is that: the cross section of the spiral groove structure is of a trapezoidal structure, the opening end is large, when the sealing material is extruded, the side face of the spiral groove structure can also be extruded and maintains pressure to the sealing material, and the sealing effect of the inner wall of a shaft of the sealing material is ensured.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, a ratio of a depth of the spiral groove structure in a radial direction of the deformable element body to a radial thickness of the deformable element body is between 1/2 and 2/3.
The beneficial effect of adopting the further scheme is that: the depth of the spiral groove structure is between 1/2 and 2/3 of the thickness of the deformable component body, ensuring adequate support of the sealing material by the deformable component body while also generating adequate pressure on the sealing material in the spiral groove structure.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the ratio of the area of the spiral groove structure on the deforming piece outer surface of the deformable element body to the deforming piece outer surface area of the deformable element body is between 1/2 and 2/3.
The beneficial effect of adopting the further scheme is that: the surface area of the deformable component body can be increased by 1 to 2 times, and the expansion rate of the deformable component body is further increased by 45 percent at most; meanwhile, enough sealing materials are arranged in the spiral groove structure, so that the reliable sealing effect between the sealing materials and the inside of the shaft is ensured.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the depth direction of the spiral groove structure penetrates the entire deformable component body.
The beneficial effect of adopting the further scheme is that: because spiral groove structure depth direction runs through whole deformable component main part for the whole spring form that is of changeability subassembly, when the sealing material setting in spiral groove structure, the sealing material can form seal structure in the outside of deformable component main part and the inboard of deformable component main part, ensures sealed effect.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the inner surface of the deformation piece of the deformable assembly body is in a conical structure.
The beneficial effect of adopting the further scheme is that: the inner surface is a conical structure, so that the tool is convenient to be matched with the conical shaft core, and the whole underground tool is shorter.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the helical groove structure has a pitch at both ends of the deformable component body that is smaller than a pitch of the helical groove structure in the middle of the deformable component body.
The beneficial effect of adopting the further scheme is that: through setting up to the structure that both ends pitch is little, middle pitch is big, both ends pitch is less, can transmit the intermediate position of deformable subassembly main part with pressure fast.
The invention further provides a downhole tool which comprises a mandrel, wherein the outer surface of the mandrel is sleeved with the deformable component, and the deformable component is the deformable component.
The working principle and the beneficial effects of the downhole tool are as follows: because the circumferential direction of the deformable component main body of the downhole tool is provided with at least one circle of complete spiral groove structure, the surface area of the deformable component main body is increased, the expansion rate of the deformable component main body is improved, and the sealing material realizes the sealing with the inner wall of a shaft because the spiral groove structure is provided with the sealing material; meanwhile, due to the fact that the spiral groove structure is arranged, when the deformable component body is subjected to axial pressure, radial pressure can be generated, extra power is provided for expansion of the deformable component body, and the expansion rate of the deformable component body is further improved. Due to the increased expansion rate of the deformable element body, the deformable element body may be provided as a relatively small volume component, thereby allowing the overall downhole tool to be smaller in volume.
The present invention also provides a method of operating a downhole tool, comprising:
putting a downhole tool into a shaft, starting the downhole tool, wherein the downhole tool comprises a mandrel, a deformable component is sleeved on the outer surface of the mandrel, the deformable component comprises a deformable component main body, the deformable component main body is provided with a deformable part outer surface and a deformable part inner surface, the deformable part inner surface is used for being installed in a surface-variable matching manner with the mandrel, at least one circle of complete spiral groove structure is arranged on the outer surface of the deformable part of the deformable component main body in the circumferential direction, the depth direction of the spiral groove structure extends from the outer surface of the deformable part to the inner surface of the deformable part, and a sealing material is arranged in the spiral groove structure;
deforming the deformable assembly body with a downhole tool to seal the helical groove structure with a sealing material disposed therein against the wellbore inner wall.
The operation method of the downhole tool has the beneficial effects that: because the circumferential direction of the deformable component main body of the downhole tool is provided with at least one circle of complete spiral groove structure, the surface area of the deformable component main body can be increased in the operation and use process of the downhole tool, the expansion rate of the deformable component main body is improved, and the sealing material realizes the sealing with the inner wall of a shaft because the spiral groove structure is provided with the sealing material; meanwhile, due to the fact that the spiral groove structure is arranged, when the deformable component body is subjected to axial pressure, radial pressure can be generated, extra power is provided for expansion of the deformable component body, and the expansion rate of the deformable component body is further improved. Due to the increased expansion rate of the deformable element body, the deformable element body can be provided as a less bulky component.
Drawings
FIG. 1 is a schematic perspective view of an embodiment of the present invention;
FIG. 2 is a view of the first embodiment of the present invention;
FIG. 3 is a perspective view of a second embodiment of the present invention;
FIG. 4 is a cross-sectional view of the first embodiment;
FIG. 5 is a sectional view of the second embodiment;
FIG. 6 is a sectional view of the third embodiment;
FIG. 7 is a sectional view of the fourth embodiment;
FIG. 8 is a perspective view of the fifth embodiment;
FIG. 9 is a cross-sectional view of example five not including a sealing material;
FIG. 10 is a sectional view of the fifth embodiment;
FIG. 11 is a cross-sectional view of an embodiment of a downhole tool;
FIG. 12 is a cross-sectional view of an embodiment of a downhole tool in an operational state.
FIG. 13 is a cross-sectional view of a second embodiment of a downhole tool;
FIG. 14 is a cross-sectional view of an embodiment of a downhole tool in two operational states.
In the drawings, the components represented by the respective reference numerals are listed below:
1. deformable component body, 2, deformable component body, 3, sealing material, 4, anchor component, 5, mandrel, 6, lower sub, 7, releasing tool, 8, wellbore.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Fig. 1, fig. 2 and fig. 4 are schematic perspective views of an embodiment of the present invention.
A deformable assembly for a downhole tool comprises a deformable assembly body 1, wherein the deformable assembly body 1 is provided with a deformable part outer surface and a deformable part inner surface, the deformable part inner surface is used for being installed in a surface-changing fit mode with a mandrel, a spiral groove structure 2 is arranged on the deformable part outer surface of the deformable assembly body 1 in the circumferential direction, the spiral groove structure 2 penetrates through the whole circumferential direction of the deformable assembly body 1, the depth direction of the spiral groove structure 2 extends from the deformable part outer surface to the deformable part inner surface, and a sealing material (not shown in the drawing) is arranged in the spiral groove structure 2.
The working principle and the beneficial effects of the invention are as follows: the helical groove structure 2 extends throughout the entire circumference of the deformable assembly body 1. The surface area of the deformable component main body is increased, the expansion rate of the deformable component main body is improved, and the sealing material 3 is arranged in the spiral groove structure 2 and realizes sealing with the inner wall of the shaft; meanwhile, due to the fact that the spiral groove structure is arranged, when the deformable component body is subjected to axial pressure, radial pressure can be generated, extra power is provided for expansion of the deformable component body, and the expansion rate of the deformable component body is further improved. Due to the increased expansion rate of the deformable element body, the deformable element body may be provided as a relatively small volume component, thereby allowing the overall downhole tool to be smaller in volume.
In the specific embodiment, the deformable member of the deformable assembly body 1 is provided with at least one complete spiral groove structure 2 in the circumferential direction, such as one, two or three turns, and the like, which can be adjusted according to the requirements of specific use conditions and expansion rate.
In the present embodiment, the spiral groove structure 2 has a square cross-sectional structure. In a specific embodiment, the cross section of the spiral groove structure 2 is in a trapezoid structure, a first bottom edge of the trapezoid structure is arranged on the outer surface of the deformation piece, the other bottom edge of the trapezoid structure is a second bottom edge, and the length of the first bottom edge is greater than that of the second bottom edge.
The cross section of the spiral groove structure 2 is of a trapezoidal structure, the opening end is large, when the sealing material is extruded, the side face of the spiral groove structure can also be extruded and maintains pressure to the sealing material, and the sealing effect of the inner wall of a shaft of the sealing material is ensured.
In the present embodiment, the ratio of the depth of the spiral groove structure 2 in the radial direction of the deformable element body 1 to the radial thickness of the deformable element body 1 is at 1/2.
The depth of the spiral groove structure is 1/2 the thickness of the deformable component body, ensuring adequate support of the deformable component body against the sealing material, while also producing adequate pressure against the sealing material in the spiral groove structure.
In the present embodiment, the ratio of the area of the spiral groove structure 2 on the outer surface of the deformation piece of the deformable member body 1 to the area of the outer surface of the deformation piece of the deformable member body 1 is 4/7.
The surface area of the deformable component body can be increased by 1.2 times, and the expansion rate of the deformable component body is further increased to 25%; meanwhile, enough sealing materials are arranged in the spiral groove structure, so that the reliable sealing effect between the sealing materials and the inside of the shaft is ensured.
In the specific embodiment, when the ratio of the area of the spiral groove structure 2 on the outer surface of the deformable member body 1 to the area of the outer surface of the deformable member body 1 is 2/3, the expansion rate of the deformable member body is increased to 45%.
In this embodiment, the deformable member inner surface of the deformable element body 1 is of cylindrical configuration.
In this embodiment, the helical groove structures 2 have equal pitch in the deformable component body 1. In a particular embodiment, the pitch of the helical groove structure 2 at both ends of the deformable component body 1 is smaller than the pitch of the helical groove structure 2 in the middle of the deformable component body 1.
Through setting up to the structure that both ends pitch is little, middle pitch is big, both ends pitch is less, can transmit the intermediate position of deformable subassembly main part with pressure fast.
The structure of the second embodiment of the invention is shown in fig. 3 and 5. The difference compared to the embodiment is that a sealing material 3 is provided in the spiral groove structure 2. The sealing material may be rubber or a degradable expandable material.
Third embodiment referring to fig. 6, a third cross-sectional view is different from the first embodiment in that the inner surface of the deforming member of the deformable member body 1 has a tapered configuration. The inner surface is a conical structure, so that the tool is convenient to be matched with the conical shaft core, and the whole underground tool is shorter.
Four cross-sectional views of the embodiment referring to fig. 7, the difference from the embodiment is that the inner surface of the deforming member of the deformable element body 1 has a tapered configuration. The inner surface is a conical structure, so that the tool is convenient to be matched with the conical shaft core, and the whole underground tool is shorter.
Structure of the fifth embodiment referring to fig. 8, 9 and 10, the difference from the third embodiment is that the spiral groove structure 2 penetrates the entire deformable member body 1 in the depth direction; the spiral groove structure 2 is filled with a sealing material 3.
Because the spiral groove structure 2 penetrates through the whole deformable component body 1 in the depth direction, the deformable component is integrally in a spring shape, and when the sealing material 3 is arranged in the spiral groove structure, the sealing material 3 can form a sealing structure on the outer side of the deformable component body 1 and the inner side of the deformable component body, so that the sealing effect is ensured.
A structural and operational state diagram of an embodiment of a downhole tool is shown in fig. 11 and 12. Comprises a mandrel 5, and the deformable component is the deformable component of the fourth embodiment. Meanwhile, the anchor assembly 4 is a conventional anchor assembly, one end of the anchor assembly is abutted with the lower joint 6, and the releasing tool 7 penetrates through the shaft core and is connected with the lower joint 6 through a shear pin.
Namely, axial pressure is applied through the releasing tool 7 to extrude the anchoring assembly towards the deformable assembly 1, and the shaft core 5 is conical, so that the deformable assembly 1 and the anchoring assembly 4 can expand in the radial direction, the deformable assembly 1 is sealed with the inner wall of the well bore 8, and the anchoring assembly 4 is anchored with the inner wall of the well bore 8, and the sealing effect of the deformable assembly 1 and the inner wall of the well bore 8 is ensured.
The second embodiment of the downhole tool is shown in the structural and operational state in fig. 13 and 14. Compared with the first downhole tool embodiment, the difference is that the spiral groove structure 2 in the deformable assembly penetrates the whole deformable assembly body 1 in the depth direction; the spiral groove structure 2 is filled with a sealing material 3. Other modes of operation are consistent with the downhole tool embodiments.
Because the spiral groove structure 2 penetrates through the whole deformable component body 1 in the depth direction, the deformable component is integrally in a spring shape, and when the sealing material 3 is arranged in the spiral groove structure, the sealing material 3 can form a sealing structure on the outer side of the deformable component body 1 and the inner side of the deformable component body, so that the sealing effect is ensured.
The present invention also provides a method of operating a downhole tool, comprising:
putting the downhole tool into a shaft, starting the downhole tool, wherein the downhole tool comprises a mandrel, a deformable component is sleeved on the outer surface of the mandrel and comprises a deformable component main body 1, the deformable component main body 1 is provided with a deformable part outer surface and a deformable part inner surface, the deformable part inner surface is used for being matched and installed with the mandrel deformation surface, at least one circle of complete spiral groove structure 2 is arranged on the outer surface of the deformable part of the deformable component main body 1 in the circumferential direction, the depth direction of the spiral groove structure 2 extends from the outer surface of the deformable part to the inner surface of the deformable part, and a sealing material 3 is arranged in the spiral groove structure 2;
the deformable assembly body 1 is deformed by a downhole tool to seal the helical groove structure 2 with the sealing material 3 disposed therein against the wellbore inner wall.
Because the deformable component main body 1 of the downhole tool is provided with at least one circle of complete spiral groove structure in the circumferential direction, the surface area of the deformable component main body is increased in the operation and use process of the downhole tool, the expansion rate of the deformable component main body is improved, and the sealing material 3 is arranged in the spiral groove structure 2 and realizes the sealing with the inner wall of a shaft; meanwhile, due to the fact that the spiral groove structure is arranged, when the deformable component body is subjected to axial pressure, radial pressure can be generated, extra power is provided for expansion of the deformable component body, and the expansion rate of the deformable component body is further improved. Due to the increased expansion rate of the deformable element body, the deformable element body can be provided as a less bulky component.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a but, the flexible subassembly for downhole tool, includes flexible subassembly main part, but flexible subassembly main part has a deformation surface and a deformation internal surface, the deformation internal surface is used for becoming the surface coordination installation with the dabber, its characterized in that, the deformation external surface of flexible subassembly main part is provided with the complete spiral groove structure of at least round on week, the degree of depth direction of spiral groove structure is by a deformation external surface to it extends to warp a piece internal surface, be provided with the sealing material among the spiral groove structure.
2. A deformable assembly for a downhole tool according to claim 1, wherein the helical groove structure extends throughout the entire circumference of the deformable assembly body.
3. A deformable assembly for a downhole tool according to claim 2, wherein the cross-section of the spiral groove structure is a trapezoid structure, a first base side of the trapezoid structure on the outer surface of the deformable member is a second base side of the trapezoid structure, and the length of the first base side is greater than that of the second base side.
4. A deformable assembly for a downhole tool according to claim 2, wherein the ratio of the depth of the helical groove structure in the radial direction of the deformable assembly body to the radial thickness of the deformable assembly body is between 1/2 and 2/3.
5. A deformable assembly for a downhole tool according to claim 2, wherein the ratio of the area of the helical groove structure on the outer surface of the deformable member of the deformable assembly body to the area of the outer surface of the deformable member of the deformable assembly body is between 1/2 and 2/3.
6. A deformable assembly for a downhole tool according to any of claims 1-5, wherein the depth direction of the helical groove structure extends through the entire deformable assembly body.
7. A deformable assembly for a downhole tool according to claim 6, wherein the inner surface of the deformable member of the deformable assembly body is of a tapered configuration.
8. A deformable assembly for a downhole tool according to claim 2 or 3, wherein the pitch of the helical groove structure at both ends of the deformable assembly body is smaller than the pitch of the helical groove structure in the middle of the deformable assembly body.
9. A downhole tool comprising a mandrel having a deformable element sleeved on an outer surface thereof, wherein the deformable element is as claimed in claims 1 to 8.
10. A method of operating a downhole tool, comprising:
putting a downhole tool into a shaft, starting the downhole tool, wherein the downhole tool comprises a mandrel, a deformable component is sleeved on the outer surface of the mandrel, the deformable component comprises a deformable component main body, the deformable component main body is provided with a deformable part outer surface and a deformable part inner surface, the deformable part inner surface is used for being installed in a surface-variable matching manner with the mandrel, at least one circle of complete spiral groove structure is arranged on the outer surface of the deformable part of the deformable component main body in the circumferential direction, the depth direction of the spiral groove structure extends from the outer surface of the deformable part to the inner surface of the deformable part, and a sealing material is arranged in the spiral groove structure;
deforming the deformable assembly body with a downhole tool to seal the helical groove structure with a sealing material disposed therein against the wellbore inner wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010344667.9A CN111350472A (en) | 2020-04-27 | 2020-04-27 | Deformable assembly for downhole tool and downhole tool |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010344667.9A CN111350472A (en) | 2020-04-27 | 2020-04-27 | Deformable assembly for downhole tool and downhole tool |
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| CN111350472A true CN111350472A (en) | 2020-06-30 |
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| CN202010344667.9A Pending CN111350472A (en) | 2020-04-27 | 2020-04-27 | Deformable assembly for downhole tool and downhole tool |
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| CN115506749A (en) * | 2021-06-23 | 2022-12-23 | 四川维泰科创石油设备制造有限公司 | A spiral ball seat |
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|---|---|---|---|---|
| CN112096344A (en) * | 2020-10-28 | 2020-12-18 | 重庆交通大学 | Soluble bridge plug |
| CN114439407A (en) * | 2021-06-23 | 2022-05-06 | 四川维泰科创石油设备制造有限公司 | Spiral underground packing tool |
| CN115506749A (en) * | 2021-06-23 | 2022-12-23 | 四川维泰科创石油设备制造有限公司 | A spiral ball seat |
| CN114439407B (en) * | 2021-06-23 | 2023-09-19 | 四川维泰科创石油设备制造有限公司 | Spiral underground packing tool |
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