CN113622819A - Drilling pressure transmission sealing device used inside drilling tool - Google Patents
Drilling pressure transmission sealing device used inside drilling tool Download PDFInfo
- Publication number
- CN113622819A CN113622819A CN202110858751.7A CN202110858751A CN113622819A CN 113622819 A CN113622819 A CN 113622819A CN 202110858751 A CN202110858751 A CN 202110858751A CN 113622819 A CN113622819 A CN 113622819A
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- sleeve
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- mandrel
- annular
- connection module
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- 238000005553 drilling Methods 0.000 title claims abstract description 42
- 238000007789 sealing Methods 0.000 title claims abstract description 40
- 230000005540 biological transmission Effects 0.000 title claims abstract description 28
- 239000000872 buffer Substances 0.000 claims abstract description 34
- 230000003139 buffering effect Effects 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B12/00—Accessories for drilling tools
Abstract
The invention discloses a drilling pressure transmission sealing device used in a drilling tool, belongs to the drilling tool, and solves the problems of unstable drilling pressure transmission mechanism and poor oil sealing of the existing drilling tool; it includes: the pressure transmission assembly is arranged between the drill string and the shell and comprises a buffer connection module and a flexible connection module which are axially abutted; the buffering connection module comprises a first sleeve connected with the drill string, a second sleeve sleeved outside the first sleeve and an elastic buffering unit, the first sleeve is in torque transmission connection with the mandrel and can move along the axial direction of the mandrel, so that the first sleeve can transmit torque to the mandrel and axial bit pressure to the second sleeve, and the elastic buffering unit is arranged between the first sleeve and the second sleeve and is used for buffering the axial bit pressure; the flexible connection module is arranged outside the mandrel in a surrounding mode, and two ends of the flexible connection module are connected with the second sleeve and the outer shell respectively so that angular, radial and axial offset degrees can be formed between the second sleeve and the outer shell.
Description
Technical Field
The invention relates to the technical field of drilling tools, in particular to a drilling pressure transmission sealing device used in a drilling tool.
Background
The rotary steering drilling tool in the current market can be divided into a pushing type and a pointing type according to different steering modes. The push-type rotary steering drilling tool is characterized in that a push force can be generated at a drill bit, and the size of the push force is related to the area of a piston and the internal and external pressure difference, so that the size of the push force is limited; meanwhile, the tool is seriously abraded due to the frequent stretching and retracting of the push plate. The directional rotary steering drilling tool forces the mandrel to bend and deform by using an eccentric mechanism, so that the drill bit is tilted by a certain angle. For the eccentric ring type eccentric mechanism, the eccentric force on the mandrel is certain while the drill bit is enabled to generate a certain angle, so that the lateral force on the drill bit is also certain. In addition, when the tool works, the mandrel is in a bending state, and the whole mandrel bears large alternating load, so that fatigue damage is easy to occur, and the service life of the tool is influenced.
The invention with the publication number of CN107882507A creatively discloses a high build-up rate rotary guide drilling tool, which respectively transmits the drilling pressure and the torque to a drill bit by adopting a drilling pressure transmission device and a torque transmission device, wherein the drilling pressure transmission device comprises an upper spherical guide block and a lower spherical guide block, the upper spherical guide block is arranged on a universal shaft through a thrust ball bearing and a deep groove ball bearing, a bearing protection sleeve is connected to the upper spherical guide block through threads, and the upper spherical guide block is fixed on a sleeve through a nut; the lower spherical guide block is fixedly connected in the guide sleeve through a bolt; the torque transmission device comprises a ball cage shell, wherein balls are arranged in the ball cage shell, and the ball cage shell is fixed in the lower spherical guide block through a fixing nut. Therefore, the weight on bit and the torque can be separately transmitted, and the transmission through the same component is avoided, so that the tool cannot work normally.
The drilling pressure transmission tool of the existing directional type guiding drilling tool is unstable in structure, cannot work under high load for a long time, and is high in failure rate. And the sealing performance of oil liquid in the tool is not good, and the phenomenon of liquid leakage is easy to occur.
Disclosure of Invention
In view of the above, it is necessary to provide a weight transmission sealing device for use in a drilling tool, so as to solve the problems of unstable weight transmission mechanism and poor oil sealing of the conventional drilling tool.
The invention provides a weight-on-bit transfer seal device for the interior of a drilling tool, comprising a drill string, a housing and a mandrel connecting the drill string and the housing, and further comprising: a pressure transmission assembly disposed between the drill string and the housing, the pressure transmission assembly including a buffer connection module and a flexible connection module axially abutted;
the buffer connection module comprises a first sleeve connected with a drill string, a second sleeve sleeved outside the first sleeve and an elastic buffer unit, the first sleeve is in torque transmission connection with a mandrel and can move along the axial direction of the mandrel, so that the first sleeve can transmit torque to the mandrel and axial bit pressure to the second sleeve, and the elastic buffer unit is arranged between the first sleeve and the second sleeve and is used for buffering the axial bit pressure;
the flexible connection module is arranged outside the mandrel in a surrounding mode, and two ends of the flexible connection module are respectively connected with the second sleeve and the shell, so that angular, radial and axial offset degrees are formed between the second sleeve and the shell.
Further, the first sleeve and the second sleeve are provided with a large end part and a small end part which have different diameters, the large end part of the first sleeve is detachably connected with a joint of a drill string, the small end part of the first sleeve is in spline connection with a mandrel, and an axial moving gap is formed between the small end part of the first sleeve and the mandrel; the large end part of the second sleeve is sleeved on the first sleeve, and a closed space for installing the elastic buffer unit is arranged between the large end part of the second sleeve and the small end part of the first sleeve.
Further, the large end of the first sleeve is in threaded connection with a joint of a drill string, and a plurality of sealing elements are arranged between the outer wall of the large end of the first sleeve and the inner wall of the large end of the second sleeve.
Furthermore, the elastic buffering unit comprises an annular elastic part and a thrust bearing which are mutually abutted, the other end of the annular elastic part is abutted with the cylinder shoulder of the first sleeve, and the other end of the thrust bearing is abutted with the cylinder shoulder of the second sleeve.
Furthermore, the annular elastic part comprises an outer ring annular spring and an inner ring annular spring, the inner ring annular spring is sleeved on the small end part of the first sleeve, and the outer ring annular spring is embedded in the inner ring annular spring.
Furthermore, the flexible connection module comprises a flexible upper joint, a flexible sheet, a flexible lower joint, a flexible intermediate body and a screwing piece which are linearly connected, the flexible upper joint is detachably connected with the end part of the second sleeve, the flexible lower joint is detachably connected with the inner wall of the shell, the flexible intermediate body is arranged between the flexible upper joint and the flexible lower joint, at least one flexible sheet is arranged in the interval between the flexible intermediate body and the flexible upper joint and the flexible lower joint, and the flexible upper joint, the flexible sheet, the flexible lower joint and the flexible intermediate body are connected through the screwing piece.
Furthermore, the flexible sheet is provided with four rotary connecting pieces which are uniformly distributed, the rotary connecting pieces are arranged in pairs, and the rotary ends of the rotary connecting pieces are arranged back to back and are connected with the parts on two sides of the flexible sheet respectively.
Furthermore, a sealing connection unit is arranged between the second sleeve and the shell, and the sealing connection unit isolates the inside of the tool from the outside and keeps the oil inside the tool sealed.
Further, the sealing connection unit comprises a first annular clamping ring, a second annular clamping ring and a sealing clamping ring arranged between the first annular clamping ring and the second annular clamping ring, the first annular clamping ring is fixedly connected with the outer wall of the second sleeve, the second annular clamping ring is fixedly connected with the inner wall of the rotating shell, and the sealing clamping ring is connected with the first annular clamping ring and the second annular clamping ring in a clamped mode respectively.
Furthermore, be equipped with first bayonet socket and second bayonet socket on first annular snap ring and the second annular snap ring respectively, sealed rand's inside and outside edge respectively with first bayonet socket and second bayonet socket joint.
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the weight-on-bit transfer sealing device used in the drilling tool, the flexible connecting module enables the second sleeve and the shell connected with the flexible connecting module to have angular, radial and axial degrees of offset by means of flexible connection among the flexible upper joint, the flexible sheet, the flexible lower joint and the flexible middle body.
(2) According to the drilling pressure transmission sealing device used in the drilling tool, the buffer connecting module utilizes the annular elastic piece to buffer the axial drilling pressure, so that impact caused by severe change of the axial drilling pressure can be relieved, and a bearing is protected.
(3) The invention relates to a weight transmission sealing device used in a drilling tool, which adopts a spline type connection mode to connect a mandrel and a drill stem, and prevents the mandrel from bearing axial weight while transmitting torque to the mandrel. The spline type connection mode has the advantages of stable structure, high reliability, strong practicability and long service life.
(4) According to the drilling pressure transmission sealing device used in the drilling tool, the sealing connection unit is arranged between the shell and the second sleeve, so that the sealing between the shell and the second sleeve is enhanced, and oil in the tool is prevented from leaking.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a schematic structural view of the present invention as a whole;
FIG. 2 is a partially enlarged schematic view of FIG. 1 at C;
FIG. 3 is a partially enlarged schematic view of FIG. 1 at B;
FIG. 4 is a schematic perspective view of a flexible connection module according to the present invention;
FIG. 5 is an enlarged partial schematic view of FIG. 1 at A;
in the figure, a drill string 100, a housing 200, a mandrel 300, a buffer connection module 400, a first sleeve 410, a second sleeve 420, a sealing member 430, an elastic buffer unit 440, an annular elastic member 441, an inner ring annular spring 441a, an outer ring annular spring 441b, a thrust bearing 442, a flexible connection module 500, a flexible upper joint 510, a flexible sheet 520, a flexible intermediate body 530, a flexible lower joint 540, a screw joint 550, a seal connection unit 600, a first annular snap ring 610, a first bayonet 611, a second annular snap ring 620, a second bayonet 621 and a seal collar 630 are shown.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.
Referring to fig. 1, in one embodiment, a weight-on-bit transfer seal device for use in a drilling tool includes: the drill string 100, the housing 200, and the mandrel 300 connecting the drill string 100 and the housing 200, the drill string 100, the housing 200, and the mandrel 300 being integral parts of a drilling tool, are well known in the art. A weight-on-bit transfer seal for the interior of a well tool further includes a pressure transmission assembly disposed between the drill string 100 and the housing 200, the pressure transmission assembly including axially abutting buffer connection modules 400 and flexible connection modules 500. In practice, the drill string 100 is rotationally coupled to the mandrel 300, transmitting torque to the mandrel 300. The drill string 100 is connected with the buffer connection module 400, axial bit pressure is transmitted to the buffer connection module 400, the buffer connection module 400 has a buffer effect on the bit pressure, load impact borne by the interior of the buffer connection module 400 is relieved, and structural stability is improved. The buffer connection module 400 transmits the axial bit pressure to the flexible connection module 500 which is abutted against the buffer connection module, the flexible connection module 500 is connected with the shell 200 and transmits the axial bit pressure to the shell 200, and the flexible connection module 500 is made of flexible materials and has certain degrees of angular, radial and axial offset.
It should be noted that: the weight-on-bit transmission sealing device for the interior of the drilling tool can also be used for transmitting the torque and the axial weight-on-bit among the shell 200, the mandrel 300 and the drill bit, and transmitting the torque and the axial weight-on-bit to the drill bit while protecting the mandrel 300 from the axial weight-on-bit.
Referring to fig. 1, the buffer connection module 400 includes a first sleeve 410 connected to the drill string 100, a second sleeve 420 sleeved outside the first sleeve 410, and an elastic buffer unit 440. The first sleeve 410 is torque-transmitting connected to the mandrel 300 and is movable in the axial direction of the mandrel, the drill string 100 transmits torque and axial weight on bit to the first sleeve 410, the first sleeve 410 is axially movable relative to the mandrel 300, only torque is transmitted to the mandrel 300 and no axial weight on bit is transmitted to the mandrel 300, and the first sleeve 410 transmits axial weight on bit to the second sleeve 420. An elastic buffer unit 440 for buffering axial bit pressure is arranged between the first sleeve 410 and the second sleeve 420.
As a further embodiment, the first sleeve 410 and the second sleeve 420 are both provided with a large end portion and a small end portion with different diameters, an inner cavity of the large end portion of the first sleeve 410 is in threaded connection with a joint of the drill string 100, an inner cavity of the small end portion of the first sleeve 410 is connected with the mandrel 300, the first sleeve 410 drives the mandrel 300 to rotate, the small end portion of the first sleeve 410 is in splined connection with the mandrel 300, an outer spline is arranged at an end portion of the mandrel 300, an inner spline is arranged inside the first sleeve 410, the mandrel 300 is inserted into the first sleeve 410, the outer spline is clamped with the inner spline, the outer spline and the inner spline can axially move, and torque can be transmitted between the outer spline and the inner spline. An axial movement gap is formed between the small end of the first sleeve 410 and the mandrel 300, and when the first sleeve 410 moves axially along the mandrel 300, an axial allowance can provide a movement space, so that the first sleeve 410 and the mandrel 300 are prevented from axially colliding. The large end of the second sleeve 420 is sleeved on the first sleeve 410, and a closed space for installing the elastic buffer unit 440 is arranged between the large end of the second sleeve 420 and the small end of the first sleeve 410. Specifically, the small end of the first sleeve 410 is inserted into the large end of the second sleeve 420, the inner wall of the large end of the second sleeve 420 and the outer wall of the small end of the first sleeve 410 form a closed space, the first sleeve 410 can axially move relative to the second sleeve 420, so that the closed space is enlarged or reduced, and the elastic buffer unit 440 resists and buffers the relative movement of the first sleeve 410 and the second sleeve 420.
It should be supplemented that a plurality of sealing elements 430 are arranged between the outer wall of the large end portion of the first sleeve 410 and the inner wall of the large end portion of the second sleeve 420, the sealing elements 430 are specifically elastic sealing rings, the number of the sealing rings is not less than two, and the sealing rings can fill gaps between the first sleeve 410 and the second sleeve 420, so as to avoid leakage of oil.
Referring to fig. 2, the elastic buffer unit 440 includes an annular elastic member 441 and a thrust bearing 442, which are abutted against each other, wherein the other end of the annular elastic member 441 is abutted against the shoulder of the first sleeve 410, and the other end of the thrust bearing 442 is abutted against the shoulder of the second sleeve 420. In the specific implementation process, the first sleeve 410, the annular elastic member 441, the thrust bearing 442 and the second sleeve 420 are sequentially abutted to transmit axial bit pressure, and the annular elastic member 441 is used for buffering pressure, so that impact caused by severe change of the axial bit pressure can be relieved, and the bearing is protected. As a further embodiment, the annular elastic member 441 includes an outer annular spring 441b and an inner annular spring 441a, the inner annular spring 441a is sleeved on the small end portion of the first sleeve 410, and the outer annular spring 441b is embedded in the inner annular spring 441 a. The nested arrangement of the outer ring annular spring 441b and the inner ring annular spring 441a can improve the elasticity of the annular elastic member 441 as a whole, and enhance the buffering and vibration damping effects.
Referring to fig. 3 and 4, the flexible connection module 500 includes a flexible upper joint 510, a flexible sheet 520, a flexible lower joint 540, a flexible middle body 530 and a screw 550, which are linearly connected, wherein the flexible upper joint 510 is connected with the second sleeve 420 through an i-shaped block, the i-shaped block is fixed with the flexible upper joint 510 and the second sleeve 420 through bolts, respectively, and the flexible lower joint 540 is in threaded connection with the housing 200. The flexible middle body 530 is disposed between the flexible upper joint 510 and the flexible lower joint 540, at least one flexible sheet 520 is disposed in a space between the flexible middle body 530 and the flexible upper joint 510 and the flexible lower joint 540, and the flexible upper joint 510, the flexible sheet 520, the flexible lower joint 540 and the flexible middle body 530 are connected by a screw 550.
As a further embodiment, four rotation pieces 550 are uniformly distributed on the flexible sheet 520, the rotation pieces 550 are specifically bolts, the rotation pieces 550 are arranged in pairs, and the rotation ends of the two pairs of rotation pieces 550 are arranged opposite to each other and are respectively connected with the parts at the two ends of the flexible sheet 520. In a specific implementation, one pair of the connectors 550 on one of the flexible sheets 520 is screwed with the flexible upper joint 510 through the flexible sheet 520, and the other pair of the connectors 550 is screwed with the flexible middle body 530 through the flexible sheet 520; one pair of screw members 550 on the other flexible sheet 520 are screwed to the flexible lower joint 540 through the flexible sheet 520, and the other pair of screw members 550 are screwed to the flexible intermediate body 530 through the flexible sheet 520. The flexible upper joint 510, the flexible lower joint 540, the flexible middle body 530 and the rotary joint 550 are provided with a convex part at the joint, so that a deformation space for bending and rotating is arranged between the flexible upper joint 510, the flexible lower joint 540, the flexible middle body 530 and the flexible sheet 520. When the mandrel 300 of the tool is offset, the flexible connection module 500 deviates from the original central axis along with the two ends of the mandrel 300, the flexible sheets 520 in the flexible connection module 500 are wound to generate certain deformation to the arranged screwed piece and enter a deformation space, so that the flexible connection module 500 has angular, radial and axial offset degrees, and the drilling pressure is ensured to be smoothly transmitted to the shell. Referring to fig. 3, a space is provided between the flexible upper joint 510 and the flexible lower joint 540 and the flexible sheet 520, and the space is used for installing other flexible sheets 520, and the amount of angular, radial and axial offset inside the flexible connection module 500 can be adjusted by increasing or decreasing the flexible sheets 520.
It should be noted that: the flexible connection module 500 including the flexible upper joint 510, the flexible sheet 520, the flexible lower joint 540, and the flexible intermediate body 530 is only one preferred embodiment of the flexible connection module 500, and is not a limitation on the structure of the flexible connection module 500.
Referring to fig. 5, a sealing connection unit 600 is disposed between the second sleeve 420 and the housing 200, the sealing connection unit 600 includes a first annular snap ring 610, a second annular snap ring 620, and a sealing collar 630 disposed between the first annular snap ring 610 and the second annular snap ring 620, the first annular snap ring 610 is fixedly connected to an outer wall of the second sleeve 420, the second annular snap ring 620 is fixedly connected to an inner wall of the rotating housing, and the sealing collar 630 is respectively engaged with the first annular snap ring 610 and the second annular snap ring 620. In a specific implementation process, the cross sections of the first annular snap ring 610 and the second annular snap ring 620 are both of an "L" shaped structure, a first bayonet 611 is arranged on the inner side of the first annular snap ring 610, and the first bayonet 611 is clamped with an inner interface of the sealing collar 630. And a second bayonet 621 is arranged on the inner side of the second annular snap ring 620, and the second bayonet 621 is clamped with the outer interface of the sealing collar 630. The sealing collar 630 is embodied as an annular elastic sealing ring, which is provided with axially extending joints at both its inner and outer edges. With the first and second annular snap rings 610, 620, the sealing collar 630 is better able to movably seal with the inner wall of the housing 200 and the outer wall of the second sleeve 420, preventing oil inside the tool from leaking.
The working process is as follows: the drill string 100 is connected with the mandrel 300 through the first sleeve 410, the first sleeve 410 transmits torque to the mandrel 300, the first sleeve 410 transmits axial weight to the elastic buffer unit 440, and after vibration damping and buffering are carried out by the elastic buffer unit 440, the axial weight is transmitted to the flexible connection module 500 and finally transmitted to the shell 200. When the mandrel 300 is biased, the elastic buffer unit 440 and the mandrel 300 are deviated from the original central axis 300 together, and the flexible sheets 520 in the flexible connection module 500 are deformed to a certain extent, so that the smooth transmission of the bit pressure to the shell 200 is ensured; meanwhile, the sealing collar 630 is deformed, but under the clamping fixation of the first annular clamping ring 610 and the second annular clamping ring 620, the sealing of oil inside the tool and the self-adaptive change of pressure are realized.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the present invention.
Claims (10)
1. A weight-on-bit transfer seal for use inside a well tool, comprising a drill string, a housing, and a mandrel connecting the drill string and the housing, further comprising: a pressure transmission assembly disposed between the drill string and the housing, the pressure transmission assembly including a buffer connection module and a flexible connection module axially abutted;
the buffer connection module comprises a first sleeve connected with a drill string, a second sleeve sleeved outside the first sleeve and an elastic buffer unit, the first sleeve is in torque transmission connection with a mandrel and can move along the axial direction of the mandrel, so that the first sleeve can transmit torque to the mandrel and axial bit pressure to the second sleeve, and the elastic buffer unit is arranged between the first sleeve and the second sleeve and is used for buffering the axial bit pressure;
the flexible connection module is arranged outside the mandrel in a surrounding mode, and two ends of the flexible connection module are respectively connected with the second sleeve and the shell, so that angular, radial and axial offset degrees are formed between the second sleeve and the shell.
2. The weight-on-bit transfer seal for the interior of a well tool as recited in claim 1, wherein said first and second sleeves each have a large end and a small end of different diameters, said large end of said first sleeve is removably connectable to a sub of a drill string, said small end of said first sleeve is splined to a mandrel, and an axial travel gap is provided between said small end of said first sleeve and said mandrel; the large end part of the second sleeve is sleeved on the first sleeve, and a closed space for installing the elastic buffer unit is arranged between the large end part of the second sleeve and the small end part of the first sleeve.
3. The weight-on-bit transfer seal for use inside a well tool as claimed in claim 2, wherein the large end of the first sleeve is threadedly connected to a sub of a drill string, and wherein a plurality of seals are provided between an outer wall of the large end of the first sleeve and an inner wall of the large end of the second sleeve.
4. The weight-on-bit transfer seal device for the interior of a drilling tool as claimed in claim 3, wherein the elastic buffer unit comprises an annular elastic member and a thrust bearing which are abutted against each other, the other end of the annular elastic member is abutted against the shoulder of the first sleeve, and the other end of the thrust bearing is abutted against the shoulder of the second sleeve.
5. The weight-on-bit transfer seal for use inside a drilling tool as claimed in claim 4, wherein the annular resilient member comprises an outer annular spring and an inner annular spring, the inner annular spring being disposed over the small end of the first sleeve, the outer annular spring being embedded in the inner annular spring.
6. The weight-on-bit transfer seal device for the interior of a well tool as claimed in claim 1 or 5, wherein the flexible connection module comprises a linear connection flexible upper joint, a flexible sheet, a flexible lower joint, a flexible intermediate body and a screw joint, the flexible upper joint is detachably connected with the end of the second sleeve, the flexible lower joint is detachably connected with the inner wall of the housing, the flexible intermediate body is arranged between the flexible upper joint and the flexible lower joint, at least one flexible sheet is arranged in the space between the flexible intermediate body and the flexible upper joint and the flexible lower joint, and the flexible upper joint, the flexible sheet, the flexible lower joint and the flexible intermediate body are connected through the screw joint.
7. The weight-on-bit transfer seal device for use in a drilling tool as claimed in claim 6, wherein the flexible sheet is provided with four evenly distributed swivel members, the swivel members are arranged opposite to each other in pairs, and the swivel ends of the two swivel members are arranged opposite to each other and are connected to the parts on both sides of the flexible sheet respectively.
8. The weight-on-bit transfer seal device for the interior of a drilling tool as claimed in claim 1 or 7, wherein a sealing connection unit is arranged between the second sleeve and the housing, and the sealing connection unit isolates the interior of the tool from the outside and keeps the interior of the tool sealed with oil.
9. The weight-on-bit transfer seal arrangement for use in a drilling tool interior of claim 8, wherein the seal connection unit comprises a first annular snap ring fixedly connected to an outer wall of the second sleeve, a second annular snap ring fixedly connected to an inner wall of the rotary housing, and a seal collar disposed between the first annular snap ring and the second annular snap ring, the seal collar being snap-fitted to the first annular snap ring and the second annular snap ring, respectively.
10. The weight-on-bit transfer seal for use in a drilling tool as claimed in claim 9, wherein the first and second annular snap rings have respective first and second bayonets, and wherein the seal collar has inner and outer edges engageable with the respective first and second bayonets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110858751.7A CN113622819B (en) | 2021-07-28 | 2021-07-28 | Drilling pressure transmission sealing device for drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110858751.7A CN113622819B (en) | 2021-07-28 | 2021-07-28 | Drilling pressure transmission sealing device for drilling tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113622819A true CN113622819A (en) | 2021-11-09 |
| CN113622819B CN113622819B (en) | 2023-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110858751.7A Active CN113622819B (en) | 2021-07-28 | 2021-07-28 | Drilling pressure transmission sealing device for drilling tool |
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| CN (1) | CN113622819B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5259467A (en) * | 1992-04-09 | 1993-11-09 | Schoeffler William N | Directional drilling tool |
| CN203383730U (en) * | 2013-05-08 | 2014-01-08 | 西南石油大学 | Directive rotary steering well drilling steering tool |
| US20160369577A1 (en) * | 2015-06-15 | 2016-12-22 | Scientific And Production Enterprise Limited Liability Company Burintekh (Burintekh Ltd) | Bottom-Hole Feeding Mechanism |
-
2021
- 2021-07-28 CN CN202110858751.7A patent/CN113622819B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5259467A (en) * | 1992-04-09 | 1993-11-09 | Schoeffler William N | Directional drilling tool |
| CN203383730U (en) * | 2013-05-08 | 2014-01-08 | 西南石油大学 | Directive rotary steering well drilling steering tool |
| US20160369577A1 (en) * | 2015-06-15 | 2016-12-22 | Scientific And Production Enterprise Limited Liability Company Burintekh (Burintekh Ltd) | Bottom-Hole Feeding Mechanism |
Non-Patent Citations (1)
| Title |
|---|
| 任福深;刘建华;李洋;王宝金;: "基于相似理论的水平受压钻柱试验装置研制", 石油机械, no. 04, pages 12 - 16 * |
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| CN113622819B (en) | 2023-11-03 |
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