CN220185072U - Differential mechanism device of pressure maintaining coring tool - Google Patents
Differential mechanism device of pressure maintaining coring tool Download PDFInfo
- Publication number
- CN220185072U CN220185072U CN202321938488.3U CN202321938488U CN220185072U CN 220185072 U CN220185072 U CN 220185072U CN 202321938488 U CN202321938488 U CN 202321938488U CN 220185072 U CN220185072 U CN 220185072U
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- China
- Prior art keywords
- pressurize
- inner tube
- pressure maintaining
- piston
- right trapezoid
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- 210000000078 claw Anatomy 0.000 claims description 23
- 238000007789 sealing Methods 0.000 abstract description 12
- 238000005553 drilling Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 241000446313 Lamella Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
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- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Abstract
The utility model provides a pressurize coring tool differential mechanism device, relates to pressurize coring technical field, including pressurize urceolus and pressurize inner tube, be provided with the flap valve between the lower part of pressurize inner tube and the pressurize urceolus, sliding seal is provided with the piston in the pressurize inner tube, the lower terminal surface of pressurize inner tube is provided with annular sealing pad, the outside of pressurize inner tube has the shoulder, the pressurize inner tube inner wall of piston top has the spacing platform to the central arch, spacing platform carries out spacingly to the up end of piston, the lateral wall of the pressurize inner tube between spacing platform and the piston is provided with along the radial gliding right trapezoid round pin of pressurize inner tube, the hypotenuse of right trapezoid round pin is located the downside, corresponding piston upper portion open have with right trapezoid round pin assorted right trapezoid annular, pressurize inner tube upper portion and pressurize urceolus between be provided with fastening assembly. The utility model ensures that the sealing pretightening force at the lower end of the pressure maintaining corer is larger, and can lock the larger pretightening force, thereby ensuring the sealing reliability.
Description
Technical Field
The utility model belongs to the technical field of pressure maintaining coring, and particularly relates to a differential mechanism device of a pressure maintaining coring tool.
Background
Cores are important physical geological data for studying and understanding subsurface geology and mineral conditions.
Core drilling refers to a drilling method in which cores are carved and removed during drilling to study the geological conditions of the subsurface. Core drilling is typically rotary drilling, in which rock is cut, ground, broken up in various ways using a drilling machine, such that a drill bit continuously drills and drills a core deep into a formation.
The upper end of the existing pressure-maintaining coring tool is sealed by a piston, and the lower end of the existing pressure-maintaining coring tool is sealed by a ball valve or a flap valve, wherein the flap valve is buckled on the pressure-maintaining outer cylinder only by a torsion spring, the pretightening force is insufficient, and the pressure-maintaining sealing effect is poor.
Disclosure of Invention
In order to improve the pretightening force of the seal at the lower end of the pressure maintaining coring mechanism and ensure the reliability of pressure maintaining, the utility model provides a differential mechanism device of the pressure maintaining coring tool.
The technical scheme provided by the utility model is as follows: the utility model provides a pressurize coring tool differential mechanism device, includes pressurize urceolus and pressurize inner tube, and the middle part and the pressurize urceolus sliding seal cooperation of pressurize inner tube are provided with the flap valve between the lower part of pressurize inner tube and the pressurize urceolus, and the interior sliding seal of pressurize inner tube is provided with the piston, and the piston upper end is connected with the drag-out pole, and the core pipe is connected to the piston lower extreme, and the lower terminal surface of pressurize inner tube is provided with annular sealed the pad, and the outside of pressurize inner tube has the shoulder, and the shoulder supports and leans on the flap valve, the pressurize inner tube inner wall of piston top have towards the bellied limit table in center, the limit table is spacing to the up end of piston, the lateral wall of the pressurize inner tube between limit table and the piston is provided with along the radial gliding right trapezoid round pin of pressurize inner tube, the hypotenuse of right trapezoid round pin is located the downside, corresponding piston upper portion open have with right trapezoid round pin assorted right trapezoid annular groove, pressurize inner tube upper portion and pressurize urceolus between be provided with fastening assembly.
The further technical scheme is as follows: the fastening assembly comprises clamping teeth positioned on the inner wall of the pressure maintaining outer cylinder and claw teeth positioned on the upper end of the pressure maintaining inner cylinder, a non-closed elastic ring used for gathering the claw teeth is wrapped on the outer side of the claw teeth in an initial state, the elastic ring is connected with the claw teeth through shear pins, the elastic ring has an outward expanding trend, a supporting ring used for removing the elastic ring is arranged in the pressure maintaining outer cylinder above the pressure maintaining inner cylinder, an inward protruding table is arranged on the inner side of the lower portion of the supporting ring, and the protruding height of the protruding table is not greater than the thickness of the elastic ring.
The further technical scheme is as follows: the upper end of the pressure maintaining outer cylinder is connected with an upper connecting cylinder body, the upper connecting cylinder body is in threaded connection with the pressure maintaining outer cylinder, the supporting ring is clamped between the upper connecting cylinder body and the pressure maintaining outer cylinder, the upper portion of the tooth claw comprises a tooth top located on the outer side and a tooth root located on the inner side, and the lower end of the upper connecting cylinder body limits the tooth top of the tooth claw and the elastic ring.
The further technical scheme is as follows: the inner diameter of the boss is equal to that of the pressure maintaining outer cylinder.
Compared with the prior art, the utility model has the beneficial effects that: the lower end surface of the pressure maintaining inner cylinder is sealed with the flap valve through the annular sealing gasket, reliable pretightening force is formed by differential engagement of the clamping teeth and the tooth claws, the pretightening effect is ideal, and the sealing reliability of the lower end of the pressure maintaining coring tool is ensured.
Drawings
Fig. 1 is a schematic view of the overall structure of the present utility model.
Fig. 2 is a partial enlarged view at a in the present utility model.
Fig. 3 is a partial enlarged view at B in the present utility model.
Fig. 4 is a view of the utility model at the elastic ring.
In the figure: 1. an upper connecting cylinder; 2. a backing ring; 2-1, a protruding table; 3. a pressure maintaining outer cylinder; 4. a pressure maintaining inner cylinder; 5. a flap valve; 6. a sealing gasket; 7. core pipe; 8. a piston; 9. a tooth claw; 9-1, tooth tops; 9-2, tooth root; 10. fishing out a rod; 11. clamping teeth; 12. an elastic ring; 13. right angle trapezoidal pin; 14. right trapezoid ring groove; 15. a limiting table; 16. a shoulder.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
As shown in fig. 1-4, the embodiment includes a pressure maintaining outer cylinder 3 and a pressure maintaining inner cylinder 4, the middle part of the pressure maintaining inner cylinder 4 is in sliding seal fit with the pressure maintaining outer cylinder 3, a flap valve 5 is arranged between the lower part of the pressure maintaining inner cylinder 4 and the pressure maintaining outer cylinder 3, a piston 8 is arranged in sliding seal in the pressure maintaining inner cylinder 4, the upper end of the piston 8 is connected with a fishing rod 10, the lower end of the piston 8 is connected with a core pipe 7, and the structure existing in the prior art is not repeated.
The innovation of the embodiment is that: the lower end face of the pressure maintaining inner cylinder 4 is provided with an annular sealing gasket 6, after the pressure maintaining inner cylinder 4 moves upwards, the flap valve 5 is automatically sealed in the pressure maintaining inner cylinder 4, and the sealing gasket 6 at the lower end of the pressure maintaining inner cylinder 4 abuts against the flap valve 5 through pressing the pressure maintaining inner cylinder 4 downwards, so that a tight pretightening force is formed.
The outer side of the pressure-maintaining inner cylinder 4 is provided with a shoulder 16, the shoulder 16 is abutted against the flap valve 5, and when the piston 8 descends, the pressure-maintaining inner cylinder 4 does not move downwards. The inner wall of the pressure-maintaining inner cylinder 4 above the piston 8 is provided with a limiting table 15 protruding towards the center, the limiting table 15 limits the upper end face of the piston 8, and when the piston 8 is lifted up, the pressure-maintaining inner cylinder 4 moves up along. In the initial state, the side wall of the pressure maintaining inner cylinder 4 between the limiting table 15 and the piston 8 is provided with a right trapezoid pin 13 sliding along the radial direction of the pressure maintaining inner cylinder 4, the inclined edge of the right trapezoid pin 13 is positioned at the lower side, and the upper part of the corresponding piston 8 is provided with a right trapezoid ring groove 14 matched with the right trapezoid pin 13.
A fastening component is arranged between the upper part of the pressure maintaining inner cylinder 4 and the pressure maintaining outer cylinder 3.
The fastening assembly of this embodiment includes the tooth 11 that is located the inner wall of pressurize urceolus 3 and the claw 9 that is located the lamella formula of pressurize inner tube 4 upper end, and the claw 9 outside parcel under the initial state has the non-closed elastic ring 12 that is used for gathering up claw 9, and elastic ring 12 passes through the shear pin with claw 9 to be connected, and the shear pin is not drawn in this embodiment, but does not influence the understanding of technical staff to the scheme. The support ring 2 for removing the elastic ring 12 is arranged in the pressure-maintaining outer cylinder 3 above the pressure-maintaining inner cylinder 4, the inner side of the lower part of the support ring 2 is provided with a protruding table 2-1 protruding inwards, and when the elastic ring 12 passes over the protruding table 2-1 from top to bottom, the protruding table 2-1 limits the downward movement of the elastic ring 12 and limits the elastic ring 12 to follow the pressure-maintaining inner cylinder 4 downwards again. The height of the protrusions of the protrusion table 2-1 is not greater than the thickness of the elastic ring 12, and the elastic ring 12 limited by the protrusion table 2-1 is left on the inner side of the supporting ring 2.
The upper end of the pressure maintaining outer cylinder 3 is connected with an upper connecting cylinder 1, the upper connecting cylinder 1 is in threaded connection with the pressure maintaining outer cylinder 3, the supporting ring 2 is clamped between the upper connecting cylinder 1 and the pressure maintaining outer cylinder 3, so that the supporting ring 2 is fixed relative to the pressure maintaining inner cylinder 4 in the axial direction, the upper part of the tooth claw 9 comprises an outer tooth top 9-1 and an inner tooth root 9-2, the lower end of the upper connecting cylinder 1 limits the tooth top 9-1 of the tooth claw 9 and the elastic ring 12, the tooth root 9-2 at the upper part of the pressure maintaining inner cylinder 4 can be connected with the upper connecting cylinder 1 through the upper connecting cylinder 1, but the elastic ring 12 and the tooth top 9-1 are limited under the upper connecting cylinder 1, the upward pulling force cuts off a shear pin connected with the tooth claw 9, and the elastic sheet in a free state has an outward expansion trend and is naturally clamped in the supporting ring 2.
The inner diameter of the boss 2-1 is equal to the inner diameter of the pressure maintaining outer cylinder 3.
The working process of the utility model is as follows:
1. coring: the device is lowered to the bottom of a drill string, and as the pressure maintaining inner cylinder 4 and the pressure maintaining outer cylinder 3 are in sealing fit, the piston 8 is also in sealing fit with the pressure maintaining inner cylinder 4, so that the piston 8 can be pushed to descend by pressing in the device, and the core barrel 7 extends out of the pressure maintaining inner cylinder 4 to take out a core.
2. The steps are as follows: fishing the fishing rod 10 by using a fishing tool, and lifting the piston 8 upwards; firstly, the upper end of the piston 8 is propped against the limit table 15 on the inner side of the pressure-maintaining inner cylinder 4, the piston 8 and the pressure-maintaining inner cylinder 4 are lifted up together, the tooth top 9-1 on the upper end of the pressure-maintaining inner cylinder 4 is propped against the lower end surface of the upper connecting cylinder 1, before the tooth top 9-1 does not touch the upper connecting cylinder 1, the elastic ring 12 firstly touches the lower end surface of the upper connecting cylinder 1, under the action of lifting tension, the shear pin between the elastic ring 12 and the tooth claw 9 is sheared, and the elastic ring 12 is naturally clamped on the boss 2-1 on the inner side of the supporting ring 2 after losing binding.
Description: when the piston 8 goes up, after the right trapezoid ring groove 14 passes through the right trapezoid pin 13, the piston 8 goes down to drive the pressure maintaining inner cylinder 4 to synchronously go down under the limit action of the right trapezoid pin 13.
3. And (3) pressing: the hydraulic pressure is applied to the pipe column, the piston 8 is pushed to move downwards by the hydraulic pressure, the pressure maintaining inner cylinder 4 is driven to move downwards synchronously by the descending of the piston 8, a strong pretightening force is formed between the lower end of the pressure maintaining inner cylinder 4 and the flap valve 5, meanwhile, the tooth claw 9 at the upper part of the pressure maintaining inner cylinder 4 is in differential engagement with the clamping tooth 11 at the upper part of the pressure maintaining outer cylinder 3, the generated strong pretightening force is locked, and the sealing reliability of the lower end of the pressure maintaining coring tool is ensured.
Claims (4)
1. The utility model provides a pressurize coring tool differential mechanism device, includes pressurize urceolus (3) and pressurize inner tube (4), the middle part and the pressurize urceolus (3) sliding seal cooperation of pressurize inner tube (4), is provided with flap valve (5) between the lower part of pressurize inner tube (4) and pressurize urceolus (3), and the interior sliding seal of pressurize inner tube (4) is provided with piston (8), and piston (8) upper end is connected with drags for pole (10), and core pipe (7) are connected to piston (8) lower extreme, its characterized in that: the lower terminal surface of pressurize inner tube (4) is provided with annular sealed pad (6), and the outside of pressurize inner tube (4) has shoulder (16), and shoulder (16) support and lean on flap valve (5), the pressurize inner tube (4) inner wall of piston (8) top have to the bellied spacing platform (15) in center, spacing platform (15) carry out spacingly to the up end of piston (8), the lateral wall of pressurize inner tube (4) between spacing platform (15) and piston (8) is provided with along the radial gliding right trapezoid round pin (13) of pressurize inner tube (4), the hypotenuse of right trapezoid round pin (13) is located the downside, correspondingly, open in piston (8) upper portion outside have right trapezoid round pin (13) assorted right trapezoid annular (14), pressurize inner tube (4) upper portion and pressurize urceolus (3) between be provided with fastening assembly.
2. A pressure maintaining coring tool differential mechanism apparatus as set forth in claim 1, wherein: the fastening assembly comprises clamping teeth (11) positioned on the inner wall of the pressure maintaining outer cylinder (3) and claw (9) positioned on the upper end of the pressure maintaining inner cylinder (4), an unsealed elastic ring (12) used for gathering the claw (9) is wrapped on the outer side of the claw (9) in an initial state, the elastic ring (12) is connected with the claw (9) through shear pins, the elastic ring (12) has an outward expanding trend, a supporting ring (2) used for removing the elastic ring (12) is arranged in the pressure maintaining outer cylinder (3) above the pressure maintaining inner cylinder (4), a protruding table (2-1) protruding inwards is arranged on the inner side of the lower portion of the supporting ring (2), and the protruding height of the protruding table (2-1) is not greater than the thickness of the elastic ring (12).
3. A pressure maintaining coring tool differential mechanism apparatus as set forth in claim 2, wherein: the upper end of the pressure maintaining outer cylinder (3) is connected with an upper connecting cylinder body (1), the upper connecting cylinder body (1) is in threaded connection with the pressure maintaining outer cylinder (3), the supporting ring (2) is clamped between the upper connecting cylinder body (1) and the pressure maintaining outer cylinder (3), the upper portion of the tooth claw (9) comprises a tooth top (9-1) positioned on the outer side and a tooth root (9-2) positioned on the inner side, and the lower end of the upper connecting cylinder body (1) is limited at the tooth top (9-1) of the tooth claw (9) and at the elastic ring (12).
4. A pressure maintaining coring tool differential mechanism apparatus as set forth in claim 2, wherein: the inner diameter of the boss (2-1) is equal to the inner diameter of the pressure maintaining outer cylinder (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321938488.3U CN220185072U (en) | 2023-07-24 | 2023-07-24 | Differential mechanism device of pressure maintaining coring tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321938488.3U CN220185072U (en) | 2023-07-24 | 2023-07-24 | Differential mechanism device of pressure maintaining coring tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220185072U true CN220185072U (en) | 2023-12-15 |
Family
ID=89100851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321938488.3U Active CN220185072U (en) | 2023-07-24 | 2023-07-24 | Differential mechanism device of pressure maintaining coring tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220185072U (en) |
-
2023
- 2023-07-24 CN CN202321938488.3U patent/CN220185072U/en active Active
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