CN113622819B - Drilling pressure transmission sealing device for drilling tool - Google Patents
Drilling pressure transmission sealing device for drilling tool Download PDFInfo
- Publication number
- CN113622819B CN113622819B CN202110858751.7A CN202110858751A CN113622819B CN 113622819 B CN113622819 B CN 113622819B CN 202110858751 A CN202110858751 A CN 202110858751A CN 113622819 B CN113622819 B CN 113622819B
- Authority
- CN
- China
- Prior art keywords
- sleeve
- flexible
- mandrel
- annular
- bit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 41
- 238000005553 drilling Methods 0.000 title claims abstract description 37
- 230000005540 biological transmission Effects 0.000 title claims abstract description 30
- 230000003139 buffering effect Effects 0.000 claims abstract description 5
- 238000013016 damping Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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 application discloses a drilling pressure transmission sealing device for the interior of 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 comprises the following steps: 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 buffer connection module comprises a first sleeve connected with the drill string, a second sleeve sleeved outside the first sleeve and an elastic buffer unit, wherein the first sleeve is in torque transmission connection with the mandrel and can move along the axial direction of the mandrel so as to enable the first sleeve to transmit torque to the mandrel, transmit axial weight on bit to the second sleeve, and the elastic buffer unit is arranged between the first sleeve and the second sleeve and used for buffering the axial weight on bit; the flexible connecting module is arranged on the outer side of the mandrel in a surrounding mode, and two ends of the flexible connecting module are respectively connected with the second sleeve and the shell so that the second sleeve and the shell are provided with angular, radial and axial offset degrees.
Description
Technical Field
The application relates to the technical field of drilling tools, in particular to a drilling pressure transmission sealing device for the interior of a drilling tool.
Background
Rotary steerable drilling tools currently on the market can be divided into two types, push-back and directional, according to the steering mode. The pushing rotary steering drilling tool is characterized in that a pushing force can be generated at the drill bit, and the pushing force is related to the area of the piston and the pressure difference between the inside and the outside, so that the pushing force is limited; meanwhile, the push plate stretches frequently, so that the tool is severely worn. The directional rotary steering drilling tool uses an eccentric mechanism to force the mandrel to bend and deform, so that the drill bit is tilted by a certain angle. For the eccentric ring type eccentric mechanism, the eccentric force of the eccentric ring type eccentric mechanism to the mandrel is constant while the drill bit generates a certain angle, so that the side force of the drill bit is also constant. In addition, when the tool works, the mandrel is in a deflection state, the whole mandrel bears larger alternating load, fatigue damage is easy to occur, and the service life of the tool is influenced.
The application creation of publication No. CN107882507A discloses a high-build-rate rotary steering drilling tool, which transmits drilling pressure and torque to a drill bit respectively 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 with the upper spherical guide block through threads, and the upper spherical guide block is fixed on the 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, a ball is arranged in the ball cage shell, and the ball cage shell is fixed in the lower spherical guide block through a fixing nut. Thus, the weight on bit and the torque can be transmitted separately, and the phenomenon that the tool cannot work normally due to the fact that the torque is transmitted through the same component is avoided.
The structure of the existing bit pressure transmission tool of the directional guide drilling tool is unstable, the long-time high-load work cannot be realized, and the failure rate is high. Moreover, the tightness of the oil in the tool is poor, and the phenomenon of liquid leakage is easy to occur.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a weight on bit transmission sealing device for use in a drilling tool to solve the problem of unstable weight on bit transmission mechanism and poor oil seal of the existing drilling tool.
The application provides a weight-on-bit transfer seal for use within a drilling tool, comprising a drill string, a housing, and a mandrel connecting the drill string and the housing, further comprising: 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 in axial abutting connection;
the buffer connection module comprises a first sleeve connected with the drill string, a second sleeve sleeved outside the first sleeve and an elastic buffer unit, wherein the first sleeve is in torque transmission connection with the mandrel and can move along the axial direction of the mandrel so as to enable the first sleeve to transmit torque to the mandrel and transmit axial bit pressure to the second sleeve, and the elastic buffer unit is arranged between the first sleeve and the second sleeve and used for buffering the axial bit pressure;
the flexible connection module is arranged on the outer side of 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 the second sleeve and the shell have angular, radial and axial offset degrees.
Further, the first sleeve and the second sleeve are respectively provided with a large end part and a small end part with 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 arranged between the small end part of the first sleeve and the mandrel; the big 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 big 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 the joint of the 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.
Further, the elastic buffer unit comprises an annular elastic piece and a thrust bearing which are mutually abutted, the other end of the annular elastic piece is abutted with the barrel shoulder of the first sleeve, and the other end of the thrust bearing is abutted with the barrel shoulder of the second sleeve.
Further, the annular elastic piece 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.
Further, 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, wherein 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.
Further, the flexible sheet is provided with four rotating parts which are uniformly distributed, the rotating parts are arranged in a pair mode, and the rotating ends of the two pairs of rotating parts are arranged in a back mode and are respectively connected with the parts on two sides of the flexible sheet.
Further, a sealing connection unit is arranged between the second sleeve and the shell, the sealing connection unit isolates the interior of the tool from the outside, and oil tightness inside the tool is maintained.
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, wherein 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 rotary shell, and the sealing clamping ring is respectively clamped with the first annular clamping ring and the second annular clamping ring.
Further, a first bayonet and a second bayonet are respectively arranged on the first annular clamping ring and the second annular clamping ring, and the inner edge and the outer edge of the sealing clamping ring are respectively clamped with the first bayonet and the second bayonet.
Compared with the prior art, the application has the following beneficial effects:
(1) According to the weight-on-bit transfer sealing device for the interior of the drilling tool, the flexible connection module is connected with the flexible connection module through the flexible connection among the flexible upper joint, the flexible sheet, the flexible lower joint and the flexible intermediate body, so that the second sleeve and the shell are connected with the flexible connection module, and the second sleeve and the shell have angular, radial and axial offset degrees.
(2) According to the bit pressure transmission sealing device for the interior of the drilling tool, the buffer connection module utilizes the annular elastic piece to buffer the axial bit pressure, so that impact caused by severe change of the axial bit pressure can be relieved, and the bearing is protected.
(3) The drilling pressure transmission sealing device for the interior of the drilling tool is characterized in that a spline type connecting mode is adopted to connect a mandrel and a drill string, torque is transmitted to the mandrel, and the mandrel is not subjected to axial drilling pressure. The spline type connecting mode has stable structure, high reliability, strong practicability and long service life.
(4) According to the drilling pressure transmission sealing device for the interior of 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 leakage in the interior of the tool is prevented.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
FIG. 1 is a schematic view of the overall structure of the present application;
FIG. 2 is a schematic view of the structure of FIG. 1, partially enlarged at C;
FIG. 3 is a schematic view of the structure of FIG. 1, partially enlarged at B;
FIG. 4 is a schematic perspective view of a flexible connection module according to the present application;
FIG. 5 is a schematic view of the structure of FIG. 1, partially enlarged at A;
in the figures, drill string 100, casing 200, mandrel 300, buffer connection module 400, first sleeve 410, second sleeve 420, seal 430, elastic buffer unit 440, annular spring 441, inner annular spring 441a, outer annular spring 441b, thrust bearing 442, flexible connection module 500, flexible upper joint 510, flexible sheet 520, flexible intermediate body 530, flexible lower joint 540, swivel 550, sealing connection unit 600, first annular snap ring 610, first bayonet 611, second annular snap ring 620, second bayonet 621, sealing collar 630.
Detailed Description
The following detailed description of preferred embodiments of the application is made in connection with the accompanying drawings, which form a part hereof, and together with the description of the embodiments of the application, are used to explain the principles of the application and are not intended to limit the scope of the application.
Referring to fig. 1, a weight-on-bit transmission sealing device for use in a drilling tool according to the present embodiment includes: drill string 100, housing 200, and mandrel 300 connecting drill string 100 and housing 200, drill string 100, housing 200, and mandrel 300 are all integral pieces of a drilling tool, as is known in the art. A weight on bit transfer seal for use inside a drilling tool further includes a pressure transmission assembly disposed between the drill string 100 and the housing 200, the pressure transmission assembly including an axially abutted buffer connection module 400 and a flexible connection module 500. In an implementation, drill string 100 is rotatably coupled to mandrel 300 and transmits torque to mandrel 300. The drill string 100 is connected with the buffer connection module 400, the axial bit pressure is transmitted to the buffer connection module 400, the buffer connection module 400 has a buffer effect on the bit pressure, the load impact born by the inside of the buffer connection module 400 is relieved, and the stability of the structure is improved. The buffer connection module 400 transmits the axial weight-on-bit to the flexible connection module 500 which is abutted against the buffer connection module, the flexible connection module 500 is connected with the housing 200 and transmits the axial weight-on-bit to the housing 200, and the flexible connection module 500 is made of flexible materials and has certain angular, radial and axial offset degrees.
What should be stated otherwise is: the weight-on-bit transmission sealing device for the interior of a drilling tool proposed by the present application can also be used for transmission of torque and axial weight-on-bit between the housing 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.
With continued reference 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. First sleeve 410 is in torque-transmitting connection with mandrel 300 and is movable in the axial direction of the mandrel, drill string 100 transmits torque and axial weight-on-bit to first sleeve 410, first sleeve 410 is movable axially relative to mandrel 300, and first sleeve 410 transmits axial weight-on-bit to second sleeve 420 only to mandrel 300 and not to mandrel 300. An elastic buffer unit 440 for buffering an axial weight on bit is provided between the first sleeve 410 and the second sleeve 420.
As a further embodiment, the first sleeve 410 and the second sleeve 420 are respectively provided with a large end and a small end with different diameters, the inner cavity of the large end of the first sleeve 410 is connected with the spindle 300 through threads, the inner cavity of the small end of the first sleeve 410 is connected with the spindle 300, the first sleeve 410 drives the spindle 300 to rotate, the small end of the first sleeve 410 is connected with the spindle 300 through a spline, the end of the spindle 300 is provided with an external spline, the inside of the first sleeve 410 is provided with an internal spline, the spindle 300 is inserted into the first sleeve 410, the external spline is clamped with the internal spline, and the external spline and the internal spline can axially move and can mutually transmit torque. An axial movement gap is provided between the small end of the first sleeve 410 and the spindle 300, and the axial margin can provide a movement space when the first sleeve 410 moves axially along the spindle 300, avoiding the first sleeve 410 from axially colliding with the spindle 300. 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 move axially relative to the second sleeve 420, so that the closed space is enlarged or reduced, and the elastic buffer unit 440 resists the relative movement of the first sleeve 410 and the second sleeve 420.
It should be added that, a plurality of sealing elements 430 are arranged between the outer wall of the large end part of the first sleeve 410 and the inner wall of the large end part 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 that leakage of oil is avoided.
Referring to fig. 2, the elastic buffer unit 440 includes an annular elastic member 441 and a thrust bearing 442 that are abutted to each other, wherein the other end of the annular elastic member 441 is abutted to the shoulder of the first sleeve 410, and the other end of the thrust bearing 442 is abutted to the shoulder of the second sleeve 420. In a specific implementation process, the first sleeve 410, the annular elastic member 441, the thrust bearing 442 and the second sleeve 420 are sequentially abutted, and the axial bit pressure is transferred between each other, and the annular elastic member 441 is used for buffering the pressure, so that the impact caused by the 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 ring-shaped spring 441b and an inner ring-shaped spring 441a, the inner ring-shaped spring 441a is sleeved on the small end portion of the first sleeve 410, and the outer ring-shaped spring 441b is embedded in the inner ring-shaped spring 441 a. The nested arrangement of the outer ring-shaped spring 441b and the inner ring-shaped spring 441a can integrally improve the elastic force of the annular elastic member 441, enhancing the cushioning 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 intermediate body 530 and a screwing piece 550 which are linearly connected, the flexible upper joint 510 is connected with the second sleeve 420 through an i-block, the i-block is respectively fixed with the flexible upper joint 510 and the second sleeve 420 through bolts, 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 the 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 swivel 550.
As a further embodiment, four screwing pieces 550 are uniformly distributed on the flexible sheet 520, the screwing pieces 550 are specifically bolts, the screwing pieces 550 are arranged in pairs, the screwing ends of the two pairs of screwing pieces 550 are arranged opposite to each other, and the screwing ends of the two pairs of screwing pieces 550 are respectively connected with the components at two ends of the flexible sheet 520. In the implementation, one pair of the connectors 550 on one flexible sheet 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 intermediate body 530 through the flexible sheet 520; one pair of connectors 550 on the other flexible sheet 520 are threaded through the flexible sheet 520 to the flexible lower joint 540 and the other pair of connectors 550 are threaded through the flexible sheet 520 to the flexible intermediate body 530. The connection parts of the flexible upper joint 510, the flexible lower joint 540 and the flexible intermediate body 530 and the screwing piece 550 are provided with protruding parts, so that deformation spaces for bending and rotating are arranged among the flexible upper joint 510, the flexible lower joint 540 and the flexible intermediate body 530 and the flexible sheet 520. When the mandrel 300 of the tool is biased, the flexible connection module 500 deviates from the original central axis along with the two ends of the mandrel 300, and the flexible sheet 520 in the flexible connection module 500 is wound into a pair of arranged screwing pieces to generate certain deformation and enters the deformation space, so that the flexible connection module 500 has angular, radial and axial bias degrees, thereby ensuring that the drilling pressure is smoothly transferred 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 magnitude of the angular, radial, and axial offset in the flexible connection module 500 can be adjusted by increasing or decreasing the flexible sheets 520.
It should be noted that: flexible connection module 500 including flexible upper joint 510, flexible sheet 520, flexible lower joint 540, and flexible intermediate 530 is only one preferred embodiment of flexible connection module 500 and is not a limitation on the construction of 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 with an outer wall of the second sleeve 420, the second annular snap ring 620 is fixedly connected with an inner wall of the rotating housing, and the sealing collar 630 is respectively clamped with the first annular snap ring 610 and the second annular snap ring 620. In the specific implementation process, the sections of the first annular snap ring 610 and the second annular snap ring 620 are both in an L-shaped structure, a first bayonet 611 is provided on the inner side of the first annular snap ring 610, and the first bayonet 611 is clamped with the inner side interface of the sealing collar 630. A second bayonet 621 is provided on the inner side of the second annular collar 620, and the second bayonet 621 engages with an outer interface of the sealing collar 630. Sealing collar 630 is embodied as an annular elastomeric seal ring with axially extending interfaces at both the inner and outer edges of the seal ring. By means of the first annular snap ring 610 and the second annular snap ring 620, the sealing collar 630 can be better movably and sealingly connected with the inner wall of the housing 200 and the outer wall of the second sleeve 420, so that oil in the tool is prevented from leaking.
The working flow is as follows: drill string 100 is coupled to mandrel 300 by first sleeve 410, first sleeve 410 transmits torque to mandrel 300, first sleeve 410 transmits axial weight-on-bit to elastic damping unit 440, after being damped and buffered by elastic damping unit 440, transmits axial weight-on-bit to flexible connection module 500, and finally to housing 200. When the spindle 300 is biased, the elastic buffer unit 440 and the spindle 300 deviate from the original central axis 300 together, and the flexible sheet 520 in the flexible connection module 500 is deformed to a certain extent, thereby ensuring that the weight on bit is smoothly transferred to the housing 200; at the same time, the sealing collar 630 also deforms along with the deformation, but under the clamping and fixing of the first annular clamping ring 610 and the second annular clamping ring 620, the sealing of the oil in the tool and the self-adaptive change of the pressure are realized.
While the application has been described with respect to the preferred embodiments, the scope of the application is not limited thereto, and any changes or substitutions that would be apparent to those skilled in the art are intended to be included within the scope of the application.
Claims (8)
1. A weight on bit transfer seal for use in a well tool comprising a drill string, a housing, and a mandrel connecting the drill string and the housing, further comprising: 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 in axial abutting connection;
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, wherein the first sleeve is connected with the mandrel in a torque transmission mode, the first sleeve can move along the axial direction of the mandrel so as to enable the first sleeve to transmit torque to the mandrel and transmit axial bit pressure to the second sleeve, and the elastic buffer unit is arranged between the first sleeve and the second sleeve and used for buffering the axial bit pressure; the elastic buffer unit comprises an annular elastic piece and a thrust bearing, one end of the annular elastic piece is in mutual abutting joint with one end of the thrust bearing, the other end of the annular elastic piece is in abutting joint with a barrel shoulder of the first sleeve, and the other end of the thrust bearing is in abutting joint with a barrel shoulder of the second sleeve; the annular elastic piece 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;
the flexible connection module is arranged on the outer side of 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 the second sleeve and the shell have angular, radial and axial offset degrees.
2. A weight on bit transmission seal for use in a well tool according to claim 1, wherein the first and second sleeves are each provided with a large end and a small end of different diameters, the large end of the first sleeve is detachably connected to a joint of a drill string, the small end of the first sleeve is splined to a mandrel, and an axial movement gap is provided between the small end of the first sleeve and the mandrel; the big 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 big end part of the second sleeve and the small end part of the first sleeve.
3. A weight on bit transmission seal for use in a well tool according to claim 2, wherein the large end of the first sleeve is threadably connected to a joint of a drill string, and 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. A weight on bit transmission sealing arrangement for use in a drilling tool according to claim 1 or claim 3, wherein the flexible connection module comprises a flexible upper joint, a flexible sheet, a flexible lower joint, a flexible intermediate body and a swivel member in linear connection, 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 of the 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 by the swivel member.
5. The weight-on-bit transfer seal for use in a well tool according to claim 4, wherein the flexible sheet has four uniformly distributed screwing members, the screwing members are disposed in pairs, and the screwing ends of the two pairs of screwing members are disposed opposite to each other and are connected to the members on both sides of the flexible sheet.
6. A weight on bit transmission seal for use in a well tool according to claim 1 or 5, wherein a sealing connection unit is provided between the second sleeve and the housing, the sealing connection unit isolating the tool interior from the environment and maintaining an oil seal within the tool interior.
7. The weight on bit transfer seal for use in a well tool according to claim 6, wherein the seal connection unit comprises a first annular collar, a second annular collar, and a seal collar disposed between the first annular collar and the second annular collar, the first annular collar being fixedly connected to an outer wall of the second sleeve, the second annular collar being fixedly connected to an inner wall of the housing, the seal collar being respectively engaged with the first annular collar and the second annular collar.
8. The weight-on-bit transfer seal for use in a drilling tool of claim 7, wherein the first and second annular snap rings are provided with first and second bayonets, respectively, and inner and outer edges of the seal collar are engaged with the first and second bayonets, respectively.
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 CN113622819A (en) | 2021-11-09 |
| CN113622819B true CN113622819B (en) | 2023-11-03 |
Family
ID=78381365
Family Applications (1)
| 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 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113622819B (en) |
Citations (2)
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2594418C1 (en) * | 2015-06-15 | 2016-08-20 | Общество с ограниченной ответственностью Научно-производственное предприятие "БУРИНТЕХ" (ООО НПП "БУРИНТЕХ") | Downhole feed mechanism |
-
2021
- 2021-07-28 CN CN202110858751.7A patent/CN113622819B/en active Active
Patent Citations (2)
| 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 |
Non-Patent Citations (1)
| Title |
|---|
| 基于相似理论的水平受压钻柱试验装置研制;任福深;刘建华;李洋;王宝金;;石油机械(第04期);第12-16页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113622819A (en) | 2021-11-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107939290B (en) | Static pointing type rotary steering drilling tool actuating mechanism | |
| US4121861A (en) | Flexible sealing joint | |
| CA2284516C (en) | Rotary and longitudinal shock absorber for drilling | |
| US9845879B2 (en) | High pressure dynamic sealing arrangement | |
| US20180100357A1 (en) | Device for isolating a tool from axial vibration while maintaining conductor connectivity | |
| US20160108970A1 (en) | Articulated Drive Shaft | |
| US8714598B2 (en) | Hydraulic fluid coupling comprising an inline swivel joint | |
| AU2012200148B2 (en) | Length-adjustable tie bar for marine engines | |
| CN113622819B (en) | Drilling pressure transmission sealing device for drilling tool | |
| JPS5848792B2 (en) | Conduit swivel joint | |
| CN212508131U (en) | Rotary guide device | |
| CN104279386A (en) | Piston balance compensating high-speed and high-pressure rotary joint | |
| US6569020B1 (en) | Motor coupler | |
| CA2926758C (en) | Rotary seal assembly for accommodating radial deflection and tilting | |
| CN214889566U (en) | Telescopic force transmission joint capable of preventing medium leakage | |
| CN211202493U (en) | Completely-locking hydraulic cylinder | |
| CN209975777U (en) | Elbow-shaped elastomer vibration energy-consumption rotation type fluid damping node | |
| EP4055292A1 (en) | A universal joint with improved stiffness | |
| JP2007162842A (en) | Shaft coupling | |
| CN109237043A (en) | A kind of rotary sealing appts of water supply or the air supply system dual fail-safe of drilling machine | |
| CN212225817U (en) | Novel universal compensation coupling of homonymy installation | |
| CN215718530U (en) | Damping device for drilling machine | |
| CN114087287B (en) | Sliding bearing and static pushing type rotary guiding tool | |
| CN113445913B (en) | A weight-on-bit diverging device for guiding tool | |
| US10851832B2 (en) | Rotary gearbox |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |