CN112483032B - Cutting device - Google Patents
Cutting device Download PDFInfo
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- CN112483032B CN112483032B CN201910859758.3A CN201910859758A CN112483032B CN 112483032 B CN112483032 B CN 112483032B CN 201910859758 A CN201910859758 A CN 201910859758A CN 112483032 B CN112483032 B CN 112483032B
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- 238000005520 cutting process Methods 0.000 title claims abstract description 84
- 241000935974 Paralichthys dentatus Species 0.000 claims abstract description 71
- 238000004873 anchoring Methods 0.000 claims abstract description 33
- 238000005192 partition Methods 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 3
- 239000012530 fluid Substances 0.000 abstract description 12
- 230000009471 action Effects 0.000 abstract description 2
- 210000000078 claw Anatomy 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 22
- 238000007789 sealing Methods 0.000 description 14
- 230000000087 stabilizing effect Effects 0.000 description 5
- 230000006978 adaptation Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
- E21B29/002—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe
- E21B29/005—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe with a radially-expansible cutter rotating inside the pipe, e.g. for cutting an annular window
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/01—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for anchoring the tools or the like
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/08—Introducing or running tools by fluid pressure, e.g. through-the-flow-line tool systems
- E21B23/10—Tools specially adapted therefor
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The application provides a cutting device, belongs to oil field workover tool technical field. The device comprises: center tube, top connection, sliding sleeve fluke, spring, turbine knife rest and cutting knife, wherein: pressure fluid enters the first central hole from the connecting pipe and then enters the hydraulic cylinder working cavity through the first flow guide hole, the hydraulic pressure in the hydraulic cylinder working cavity rises, the hydraulic pressure acts on the circular ring, the spring is compressed, the sliding sleeve anchor fluke descends and is anchored on the inner wall of a pipeline to be cut, the pressure fluid enters the third central hole, is ejected from a high-pressure jet hole at the lower part of the anchor fluke seat anchor cone body and acts on a vortex surface below the anchor claw seat anchor cone body to enable the turbine tool rest to rotate, and the cutting knife rotates out from the third annular groove under the action of centrifugal force and rotates around the axis of the turbine tool rest together with the turbine tool rest to perform cutting operation. By adopting the device, the anchoring reliability of the cutting device can be improved, and the cutting failure caused by anchoring failure is avoided.
Description
Technical Field
The embodiment of the application belongs to the technical field of oilfield workover tools, and particularly relates to a cutting device.
Background
In the course of oil field well repair operation, it is often necessary to cut oil pipes, casings, drill pipes, etc. downhole.
In the related art, taking cutting of an oil pipe underground as an example, the lower part of a coiled tubing, a hydraulic anchor, a screw pump and a hydraulic internal cutter are sequentially connected and lowered into the oil pipe, pressure fluid is pumped into the coiled tubing, the generated hydraulic pressure pushes an anchor claw of the hydraulic anchor away from the inner wall of the anchored oil pipe, meanwhile, the screw pump is rotated by increasing the hydraulic pressure, and the screw pump drives the hydraulic internal cutter to rotate so as to cut the oil pipe.
In the above technology, since the time difference between the hydraulic anchor and the screw pump is very short, when the hydraulic internal cutting knife starts to rotate for cutting, the hydraulic anchor is not yet anchored successfully, and the cutting failure is easily caused by the anchoring failure.
Disclosure of Invention
The embodiment of the application provides a cutting device, the device includes: center tube, top connection, sliding sleeve fluke, spring, turbine knife rest and cutting knife, wherein:
the central pipe comprises a first part, a second part, a fluke anchor body and a partition bridge, wherein the first part, the second part and the fluke anchor body are respectively provided with a first central hole, a second central hole and a third central hole, the axis of the first central hole, the axis of the second central hole and the axis of the third central hole are respectively superposed with the axis of the central pipe, the partition bridge is a solid body and is positioned between the first central hole and the second central hole to partition the first central hole from the second central hole, the second central hole is communicated with the third central hole, the first part is provided with a first flow guide hole which is communicated with the first central hole and the central pipe, the second part is provided with a second flow guide hole which is communicated with the second central hole and the central pipe, the diameter of the top surface of the anchor fluke anchor cone is larger than the outer diameter of the second part, the anchor fluke anchor cone is provided with a circular truncated cone-shaped outer wall, the lower part of the anchor fluke anchor cone is provided with a high-pressure jet hole, and the high-pressure jet hole is communicated with the third central hole and the outside of the central tube;
The upper joint is a cylindrical body, the interior of the upper joint is hollow, and the inner wall of the upper joint is connected with the outer wall of the upper part of the central pipe;
the sliding sleeve fluke comprises a sliding sleeve and a fluke, the sliding sleeve is cylindrical, the sliding sleeve is provided with a first through hole and a second through hole, the inner wall of the first through hole is in contact with the outer wall of the upper connector, a circular ring is arranged on the inner wall between the first through hole and the second through hole, the first through hole and the second through hole are communicated through a central hole of the circular ring, the fluke is connected with the bottom of the sliding sleeve, the upper part of the sliding sleeve fluke is in contact with the upper connector, the inner wall of the circular ring is in contact with the outer wall of the first part and/or the second part, and the lower part of the sliding sleeve fluke is in contact with the outer wall of the fluke-sitting anchor cone;
a hydraulic cylinder working cavity is formed among the bottom surface of the upper joint, the inner wall of the first through hole, the top surface of the circular ring and the outer wall of the central pipe;
a spring working cavity is formed among the bottom surface of the circular ring, the inner wall of the sliding sleeve fluke, the outer wall of the second part and the top surface of the fluke anchoring cone body, and the spring is positioned in the spring working cavity;
the turbine tool rest is connected with the bottom of the anchor fluke anchoring cone body, the turbine tool rest is columnar, and the top surface of the turbine tool rest is a vortex surface;
The cutting knife is connected with the turbine knife rest.
Optionally, be equipped with third annular groove on the turbine knife rest lateral wall, third annular groove top surface is equipped with cutting knife fixing thread hole, cutting knife fixing thread is threaded the downthehole first internal thread that is equipped with, third annular groove bottom surface is equipped with the cutting knife fixed orifices, the cutting knife fixed orifices intercommunication third annular groove bottom surface with turbine knife rest bottom surface, the axis of cutting knife fixed orifices with the axis coincidence of cutting knife fixing thread hole.
Optionally, the device still includes at least one first screw, be equipped with first external screw thread on the at least one first screw, at least first external screw thread with cutting knife fixing thread hole adaptation is equipped with the cutting knife through-hole on every cutting knife, the axis of cutting knife through-hole with the axis coincidence of cutting knife fixing hole, first screw is from up passing in proper order down the cutting knife fixing hole cutting knife through-hole, then with cutting knife fixing thread hole carries out threaded connection.
Optionally, a third diversion hole is formed in the lowest position of the vortex surface, and the third diversion hole is a through hole and communicates the vortex surface with the top surface of the third annular groove.
Optionally, the device further comprises a nut, a second internal thread is arranged on the inner wall of the nut, the bottom of the anchor fluke anchoring cone body is a cylinder, a second external thread is arranged on the outer wall of the cylinder, and the second external thread is matched with the second internal thread.
Optionally, the turbine tool rest is provided with a third through hole, an axis of the third through hole coincides with an axis of the cylinder, a diameter of the third through hole is greater than or equal to a diameter of the cylinder, and the cylinder penetrates through the third through hole.
Optionally, the device further comprises a pin, a cylindrical through hole is formed in the cylinder, the axis of the cylindrical through hole is perpendicular to the axis of the cylinder, a first nut through hole and a second nut through hole are formed in the nut, the axis of the first nut through hole coincides with the axis of the second nut through hole, the axis of the first nut through hole coincides with the axis of the cylindrical through hole, and the opening pin penetrates through the first nut through hole, the cylindrical through hole and the second nut through hole.
Optionally, the device still includes the bearing, the bearing is equipped with the bearing through-hole, turbine knife rest bottom surface is equipped with the bearing mounting hole, the axis of bearing mounting hole with the axis coincidence of vortex knife rest, the cylinder with the interference of bearing through-hole is connected, the bearing with the bearing mounting hole interference is connected.
Optionally, the device further comprises a first sealing element, a first annular groove is formed in the outer wall of the lower portion of the upper joint, and the first sealing element is located in the first annular groove.
Optionally, the device further includes a second sealing element, a second annular groove is formed in the inner wall of the ring, and the second sealing element is located in the second annular groove.
Optionally, the device is still including surely nailing, the cylindricality part of surely nailing is equipped with the third external screw thread, be equipped with on the top connection and surely follow closely the through-hole, the top of first portion is equipped with surely follows closely the screw hole, surely follow closely the threaded hole and be equipped with the third internal thread, the axis of surely following closely the through-hole with the axis coincidence of surely following closely the screw hole, the third external screw thread with third internal thread adaptation, surely follow closely the nail and pass surely follow closely the through-hole with surely follow closely the screw hole and carry out threaded connection.
Optionally, the high pressure jet hole is a right-handed hole.
Optionally, the vortex surface is a right-hand vortex surface.
Optionally, the inner wall of the lower part of the upper joint is provided with a connecting thread, and the upper joint is in threaded connection with the first part.
The beneficial effects of the embodiment of the application can include:
The embodiment of the application provides a cutting device, through let in pressure liquid toward the device in, it is down to promote the sliding sleeve fluke, the fluke is opened, the anchoring is on the inner wall of waiting to cut the pipeline, high-pressure jet hole jets out the pressure liquid stream, make turbine knife rest drive the cutting knife rotatory cutting, give a decurrent pressure of the device among the cutting process, the zigzag surface of cooperation fluke outer wall, improve anchoring reliability, avoid causing the sword and/or cutting failure because of anchoring failure, integrate anchoring structure and cutting structure, the structure is simplified, high reliability.
Drawings
Fig. 1 is a schematic cross-sectional view of a cutting device provided in an embodiment of the present application;
fig. 2 is an external structural schematic diagram of a cutting device provided in an embodiment of the present application;
FIG. 3 is a three-dimensional structural schematic of a turbine tool holder;
FIG. 4 is a cross-sectional structural schematic view of a turbine tool holder;
fig. 5 is an external structural view of the turbine tool holder.
Description of the drawings
1. Center tube 11, first part
12. Second part 13, fluke anchor cone
14. The cutoff bridge 15, the first center hole
16. Second center hole 17, third center hole
18. The first flow guide hole 19 and the second flow guide hole
10. High-pressure jet hole 2 and upper joint
3. Sliding sleeve fluke 31 and sliding sleeve
32. Fluke 33, ring
4. Spring 5 and turbine tool rest
51. Third through hole 52, vortex surface
53. Third diversion hole 54 and cutting knife fixing hole
55. Cutting knife fixing threaded hole 56 and bearing mounting position
6. Cutting knife 7, nut
8. Pin
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of methods consistent with aspects of the present application, as detailed in the appended claims.
Fig. 1 is a schematic cross-sectional structural view of a cutting device provided in an embodiment of the present application, and referring to fig. 1, the cutting device may include: the device comprises a central pipe 1, an upper joint 2, a sliding sleeve fluke 3, a spring 4, a turbine tool rest 5 and a cutting knife 6.
The central tube 1 comprises a first part 11, a second part 12, a fluke-sitting anchor cone 13 and a bridge spacer 14, wherein the first part 11, the second part 12 and the fluke-sitting anchor cone 13 are respectively provided with a first central hole 15, a second central hole 16 and a third central hole 17, the axes of the first central hole 15, the second central hole 16 and the third central hole 17 are respectively coincident with the axis of the central tube, the bridge spacer 14 is a solid body and is positioned between the first central hole 15 and the second central hole 16 to separate the first central hole 15 from the second central hole 16, the second central hole 16 is communicated with the third central hole 17, the first part 11 is provided with a first diversion hole 18, the first diversion hole 18 is communicated with the first central hole 15 and the outside of the central tube 1, the second part 12 is provided with a second diversion hole 19, the second diversion hole 19 is communicated with the second central hole 16 and the outside of the central tube 1, the diameter of the top surface of the fluke-sitting anchor cone 13 is larger than the outer diameter of the second part 12, the fluke anchor sitting centrum 13 is provided with a circular table-shaped outer wall, the lower part of the fluke anchor sitting centrum 13 is provided with a high-pressure jet hole 10, and the high-pressure jet hole 10 is communicated with the third center hole 17 and the outside of the center pipe 1.
The base pipe 1 comprises, from top to bottom, a first section 11, a second section 12, a partition bridge 14 and a fluke anchoring cone 13. In the operation process of the cutting device, pressure liquid firstly enters the first center hole 15, the first center hole 15 and the second center hole 16 are completely separated by the separating bridge 14, the pressure liquid cannot directly enter the second center hole 16 from the interior of the center pipe 1, when the liquid level in the first center hole 15 reaches the height of the first flow guide hole 18, the pressure liquid flows out of the first flow guide hole 18 and flows into the second center hole 16 from the outside of the center pipe 1 through the second flow guide hole 19, and the pressure liquid directly flows into the third center hole 17 from the second center hole 16 and then is ejected from the high-pressure jet hole 10 at the lower part of the anchor fluke seat anchor cone 13 because the second center hole 16 is communicated with the third center hole 17.
Alternatively, the pressure fluid may be water, saline, or other fluid, which is not limited in this application.
Alternatively, the first and second sections 11 and 12 are circular cylinders, and the outer diameters of the first and second sections 11 and 12 are equal, so that the circular table can slide up and down along the outer wall of the central tube 1.
Alternatively, the lower end of the circular truncated cone shaped outer wall of the fluke anchoring vertebral body 13 is an inverted circular truncated cone shaped outer wall, and the high pressure jet hole 10 is provided on the inverted circular truncated cone shaped outer wall of the fluke anchoring vertebral body 13 so that the liquid flow ejected through the high pressure jet hole 10 can act on the vortex surface 52.
Optionally, a cylindrical outer wall is arranged between the circular truncated cone-shaped outer wall and the circular truncated cone-shaped outer wall of the fluke anchoring cone body 13, so that the number of acute angles of the fluke anchoring cone body 13 is reduced, and the safety of the cutting device is improved.
The number of the first diversion holes 18 may be 1, 2, 3, 4, 5, 6, etc., which is not limited in the embodiments of the present application.
Optionally, the first diversion holes 18 are circumferentially distributed on the pipe wall of the first portion 11, so as to facilitate the machining and forming of the first diversion holes 18.
The number of the second guiding holes 19 may be 1, 2, 3, 4, 5, 6, etc., which is not limited in the embodiments of the present application.
Optionally, the second guiding holes 19 are circumferentially distributed on the wall of the second portion 12, so as to facilitate the machining and forming of the second guiding holes 19.
The number of the high-pressure jet holes 10 may be 1, 2, 3, 4, 5, 6, etc., which is not limited in the embodiments of the present application.
Optionally, the high-pressure jet holes 10 are circumferentially distributed on the outer wall of the inverted frustum shape of the fluke anchoring cone 13, so that the high-pressure jet holes 10 can be conveniently machined and formed.
Optionally, the sum of the cross-sectional areas of the high-pressure jet holes 10 is smaller than or equal to the cross-sectional area of the third central hole 17, so that when the pressure fluid is continuously introduced into the central tube 1, a certain continuous hydraulic pressure can be provided in the third central hole 17, so that the high-pressure jet holes 10 can continuously jet a pressure fluid flow with a certain speed.
The upper joint 2 is a cylindrical body, the interior of the upper joint is hollow, and the inner wall of the upper joint 2 is connected with the outer wall of the upper part of the central tube 1.
Optionally, the inner wall of the lower portion of the upper joint 2 is provided with a connecting thread, the upper joint 2 is in threaded connection with the first portion 11, the inner wall of the lower portion of the upper joint 2 is provided with a fourth internal thread, the outer wall of the first portion 11 is provided with a fourth external thread, and the fourth external thread is matched with the fourth internal thread, so that the upper joint 2 and the first portion 11 are connected simply, conveniently and tightly.
Optionally, the fourth external thread is located above the first diversion hole 18, so that the upper joint 2 does not block the first diversion hole 18.
Alternatively, the upper part of the inner wall of the upper joint 2 is provided with an AMMT (American Mining Macaroni Tubing thread) internal thread adapted to the external thread at the bottom of the connection pipe, and the cutting device is connected to the bottom of the connection pipe by the threaded connection of the upper joint 2 and the connection pipe, so that pressure fluid can enter the central pipe 1 through the upper joint 2.
Optionally, the thread on the upper portion of the inner wall of the upper joint 2 may also be other threads matched with the external thread on the bottom of the connection pipe, which is not limited in this embodiment of the present application.
Optionally, the device is still including steady nail 9, the cylindricality part of steady nail 9 is equipped with the third external screw thread, be equipped with steady nail through-hole on the top connection 2, the top of first portion 11 is equipped with steady nail screw hole, steady nail threaded hole is equipped with the third internal screw thread, the axis of steady nail through-hole coincides with the axis of steady nail screw hole, third external screw thread and third internal thread adaptation, steady nail 9 passes and surely carries out threaded connection with steady nail screw hole, make the connection between top connection 2 and the first portion 11 more fasten.
Optionally, the nail stabilizing threaded hole is not communicated with the first central hole 15, so that the sealing effect of the first central hole 15 is ensured, and the pressure fluid in the central tube 1 cannot leak out of the nail stabilizing 9.
The number of the stabilizing nails 9 may be 1, 2, 3, and the like, which is not limited in the embodiment of the present application.
Fig. 2 is an external structural schematic diagram of a cutting device provided in an embodiment of the present application, and referring to fig. 2, the sliding sleeve fluke 3 includes a sliding sleeve 31 and a fluke 32, the sliding sleeve 31 is cylindrical, the sliding sleeve 31 is provided with a first through hole and a second through hole, an inner wall of the first through hole contacts with an outer wall of the upper joint 2, an annular ring 33 is provided on an inner wall between the first through hole and the second through hole, the first through hole and the second through hole are communicated by a central hole of the annular ring 33, the fluke 32 is connected with a bottom of the sliding sleeve 31, an upper portion of the sliding sleeve fluke 3 contacts with the upper joint 2, an inner wall of the annular ring 33 contacts with an outer wall of the first portion 11 and/or the second portion 12, and a lower portion of the sliding sleeve fluke 3 contacts with an outer wall of the anchor anchoring body 13.
Alternatively, the outer wall of fluke 32 may be a serrated surface with the serrations sloping downwards to provide a more stable anchoring of fluke 32.
The distance from the top surface of the circular ring 33 to the top end of the sliding sleeve 31 is larger than the distance between the first diversion hole 18 and the second diversion hole 19.
Optionally, the outer wall of the upper joint 2 includes an upper outer wall and a lower outer wall, the outer wall portion of the upper joint 2, which is completely not in contact with the sliding sleeve fluke 3, is the upper outer wall, the portion of the upper joint 2 corresponding to the sliding sleeve 31 is the lower outer wall, the lower outer wall can be located in the first through hole of the sliding sleeve 31, the diameter of the upper outer wall is larger than that of the lower outer wall, when the lower outer wall is completely located in the first through hole, the ring 33 is located between the first diversion hole 18 and the second diversion hole 19, before the anchoring of the fluke 32 is completed, no pressure liquid reaches the turbine knife rest 5, so that the turbine knife rest 5 drives the cutting knife 6 to rotate, and the anchoring stability is ensured.
Optionally, the nail stabilizing through hole is formed in the upper outer wall of the upper joint 2, so that the nail stabilizing 9 can be conveniently detached and installed.
Optionally, the device further comprises a first sealing element, a first annular groove is formed in the outer wall of the lower portion of the upper joint 2, and the first sealing element is located in the first annular groove, so that the sealing performance of the working cavity of the hydraulic cylinder is improved.
The number of the first sealing members may be 1, 2, 3, and the like, which is not limited in the embodiments of the present application.
The number of the first annular grooves may be 1, 2, 3, and the like, which is not limited in the embodiments of the present application.
Optionally, the device further includes a second sealing element, a second annular groove is formed in the inner wall of the ring 33, and the second sealing element is located in the second annular groove, so that the sealing performance of the working chamber of the hydraulic cylinder is improved.
The number of the second sealing members may be 1, 2, 3, and so on, which is not limited in the embodiments of the present application.
The number of the second annular grooves may be 1, 2, 3, and the like, which is not limited in the embodiments of the present application.
A hydraulic cylinder working cavity is formed among the bottom surface of the upper joint 2, the inner wall of the first through hole, the top surface of the circular ring 33 and the outer wall of the central pipe 1.
Alternatively, when the lower outer wall is completely located in the first through hole, the first pilot hole 18 communicates with the hydraulic cylinder working chamber, so that the pressure fluid can smoothly flow into the hydraulic cylinder working chamber from the first pilot hole 18.
A spring working cavity is formed among the bottom surface of the circular ring 33, the inner wall of the sliding sleeve fluke 3, the side wall of the central pipe 1 and the top surface of the fluke anchoring cone body 13, and the spring 4 is positioned in the spring working cavity.
When the hydraulic pressure in the hydraulic working cavity reaches a certain value, the hydraulic pressure acts on the top surface of the circular ring 33, so that the sliding sleeve anchor jaw 3 moves downwards, the spring 4 is compressed, when the hydraulic pressure is removed, the hydraulic pressure in the hydraulic working cavity is reduced, the spring 4 bounces, the elastic force generated by the compression of the spring 4 acts on the bottom surface of the circular ring 33, and the sliding sleeve anchor jaw 3 also ascends along with the elastic force.
Optionally, the spring 4 is a single spring and is enclosed outside the central tube 1, the bottom end of the spring 4 can be in press fit with the top surface of the fluke anchor cone 13, the top end of the spring 4 can be in press fit with the bottom surface of the circular truncated cone, and the central tube 1 performs a limiting and fixing function on the spring 4, so that the acting force between the spring 4 and the circular ring 33 is perpendicular to the bottom surface of the circular ring 33.
Optionally, the elastic modulus of the spring 4 is greater than or equal to the first preset value, so that the spring 4 can have enough elastic force to push the sliding sleeve fluke 3 to ascend.
Optionally, the modulus of elasticity of the spring 4 is less than or equal to a second preset value, ensuring that the hydraulic pressure inside the cutting device is not so great that the device is significantly deformed or damaged.
It should be noted that, the first preset value and the second preset value are set by a relevant technician in an actual operation process, and the embodiment of the present application does not limit this.
Fig. 5 is an external structural schematic diagram of the turbine tool holder, and referring to fig. 1 and 5, the turbine tool holder 5 is connected with the bottom of the fluke-anchored cone 13, the turbine tool holder 5 is columnar, the top surface thereof is a vortex surface 52, and the cutting knife 6 is connected with the turbine tool holder 5.
The pressure liquid is jetted to the vortex surface 52 of the turbine from the high-pressure jet hole 10 to push the turbine to rotate, and the cutting knife 6 is driven to rotate when the turbine rotates.
Fig. 3 is a schematic three-dimensional structure of the turbine tool holder, fig. 4 is a schematic sectional structure of the turbine tool holder, and referring to fig. 3 and 4, alternatively, a third annular groove is formed in a side wall of the turbine tool holder 5, a cutter fixing threaded hole 55 is formed in a top surface of the third annular groove, a first internal thread is formed in the cutter fixing threaded hole 55, a cutter fixing hole 54 is formed in a bottom surface of the third annular groove, the cutter fixing hole 54 communicates the bottom surface of the third annular groove with a bottom surface of the turbine tool holder 5, and an axis of the cutter fixing hole 54 coincides with an axis of the cutter fixing threaded hole 55.
Optionally, the device further includes at least one first screw, the at least one first screw is provided with a first external thread, the at least first external thread is matched with the cutting knife fixing threaded hole 55, each cutting knife 6 is provided with a cutting knife through hole, an axis of the cutting knife through hole coincides with an axis of the cutting knife fixing hole 54, and the first screw sequentially penetrates through the cutting knife fixing hole 54 and the cutting knife through hole from bottom to top and then is in threaded connection with the cutting knife fixing threaded hole 55.
Optionally, the diameter of the cutter through hole is greater than or equal to the diameter of the cylindrical portion of the first screw, so that the cutter 6 can rotate about the at least one first screw.
Optionally, the portion of the at least one first screw located in the third annular groove is smooth, which may reduce frictional resistance generated when the cutter through hole is rotated around the at least one first screw, and may also reduce wear of the cutter 6 and the at least one first screw.
Optionally, the tip of the cutting knife 6 is made of diamond, so that the tip has enough hardness, damage to the tip caused by cutting is reduced, and loss of the tip part is reduced.
Optionally, diamond particles are arranged on the surface of the cutter 6, so that the wear resistance of the cutter 6 can be improved.
Optionally, a third guiding hole 53 is formed in the lowest position of the vortex surface 52, and the third guiding hole 53 is a through hole and communicates the vortex surface 52 with the top surface of the third annular groove, so that part of the pressure liquid on the vortex surface 52 can flow into the third annular groove from the third guiding hole 53, and has a cleaning effect on the third annular groove, and meanwhile, the pressure liquid can also act on the cutting knife 6 to help the cutting knife 6 to rotate. .
Optionally, the high pressure jet hole 10 is a right-handed hole, so that the high pressure jet hole 10 can eject a right-handed pressure liquid flow.
Optionally, the swirling surface 52 is a right-handed swirling surface, so that the force of the right-handed pressure fluid stream emitted from the high-pressure jet hole 10 can be used as much as possible to drive the turbine blade holder 5 to rotate.
Optionally, the right-hand angle of the high-pressure jet hole 10 is 30 °, 40 °, 45 °, 50 °, 60 °, and the like, which is not limited in this application.
Optionally, the device further comprises a nut 7, a second internal thread is arranged on the inner wall of the nut 7, the bottom of the anchor fluke anchoring cone 13 is a cylinder, a second external thread is arranged on the outer wall of the cylinder, the second external thread is matched with the second internal thread, and the nut 7 is used for connecting the turbine tool rest 5 to the cylinder at the bottom of the anchor fluke anchoring cone 13.
Optionally, the turbine tool holder 5 is provided with a third through hole 51, the axis of the third through hole 51 coincides with the axis of the cylinder, the diameter of the third through hole 51 is greater than or equal to the diameter of the cylinder, and the cylinder passes through the third through hole 51, so that the turbine tool holder 5 can rotate around the cylinder.
Optionally, the device further comprises a pin 8, a cylindrical through hole is formed in the cylinder, the axis of the cylindrical through hole is perpendicular to the axis of the cylinder, a first nut through hole and a second nut through hole are formed in the nut 7, the axis of the first nut through hole coincides with the axis of the second nut through hole, the axis of the first nut through hole coincides with the axis of the cylindrical through hole, and the split pin 8 penetrates through the first nut through hole, the cylindrical through hole and the second nut through hole, so that the nut 7 is not prone to being separated from the cylindrical through hole, and the connection stability of the turbine knife rest 5 and the cylinder is guaranteed.
Optionally, the pin 8 is a cotter pin.
Optionally, the device further comprises a bearing, the bearing is provided with a bearing through hole, the bottom surface of the turbine tool rest 5 is provided with a bearing mounting hole 56, the axis of the bearing mounting hole 56 coincides with the axis of the turbine tool rest, the cylinder is in interference connection with the bearing through hole, the bearing is in interference connection with the bearing mounting hole 56, the fastening connection between the bearing and the cylinder and the fastening connection between the bearing and the bearing mounting hole 56 are ensured, and the rotation resistance of the turbine tool rest 5 is reduced.
The device has the functions realized by the original mode that: the device is connected to the bottom of a connecting pipe through an internal thread on the upper part of the inner wall of an upper connector 2, pressure liquid is continuously introduced into the connecting pipe, the pressure liquid enters a first central hole 15 from the connecting pipe, the liquid level in the first central hole 15 rises, the pressure liquid enters a hydraulic cylinder working cavity through a first flow guide hole, the hydraulic pressure in the hydraulic cylinder working cavity rises, the hydraulic pressure acts on a circular ring 33 to push a sliding sleeve fluke 3 to move downwards, a spring 4 in the spring working cavity is compressed, an anchor fluke 32 is opened in an umbrella shape along the circular table-shaped outer wall of an anchor fluke seat anchor cone body 13 and is anchored on the inner wall of a pipeline to be cut, when the circular ring 33 moves downwards to the lower part of a second flow guide hole 19, the pressure liquid in the hydraulic cylinder working cavity enters a second central hole 16 and a third central hole 17 from the second flow guide hole 19, the pressure liquid is ejected from a high-pressure jet hole 10 on the lower part of the anchor fluke seat anchor cone body 13 to form a pressure vortex liquid flow with a certain speed and acts on a lower surface 52, the cutter blade 6 is rotated out of the third annular groove by centrifugal force by rotating the turbine blade holder 5, and is rotated together with the turbine blade holder 5 about the axis of the turbine blade holder 5 to perform cutting work. When cutting, a downward pressure is given to the device, and since fluke 32 is umbrella-shaped and the serrations on its outer surface are inclined downwards, fluke 32 is anchored more stably under this downward pressure. After cutting, stopping introducing pressure liquid into the central tube 1, enabling high pressure in a working cavity of the hydraulic cylinder to disappear, enabling the spring 4 to bounce, pushing the sliding sleeve anchor jaw 32 to go upwards and reset, enabling the anchor jaw 32 to be unlocked, enabling the turbine tool rest 5 to rotate slowly until the rotation is stopped, enabling the cutting knife 6 to be withdrawn into the third annular groove under the action of centrifugal force, and finishing cutting operation.
To sum up, in the embodiment of the application, through letting in pressure fluid in the device, promote sliding sleeve fluke 3 and descend, fluke 32 is opened, the anchoring is on the inner wall of waiting to cut the pipeline, high-pressure jet hole 10 jets out the pressure liquid stream, make turbine knife rest 5 drive cutting knife 6 rotation and cut, give a decurrent pressure of the device among the cutting process, the zigzag surface of cooperation fluke 32 outer wall, anchoring reliability is good, knife beating and/or cutting failure caused because of anchoring failure have been avoided, the device integrates anchoring structure and cutting structure, the structure is retrencied, connection stability and sealing performance between the structure are good, revolution mechanic's rotating resistance is little, device reliability is good.
The above description is only exemplary of the present application and should not be taken as limiting the present application, and any modifications, equivalents, improvements and the like that are made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A cutting device, characterized in that the device comprises: center tube, top connection, sliding sleeve fluke, spring, turbine knife rest and cutting knife, wherein:
the central tube comprises a first part, a second part, a fluke-sitting anchor cone and a partition bridge, wherein the first part, the second part and the fluke-sitting anchor cone are respectively provided with a first central hole, a second central hole and a third central hole, the axis of the first central hole, the axis of the second central hole and the axis of the third central hole are respectively superposed with the axis of the central tube, the partition bridge is a solid body and is positioned between the first central hole and the second central hole to partition the first central hole and the second central hole, the second central hole is communicated with the third central hole, the first part is provided with a first diversion hole which is communicated with the first central hole and the outside of the central tube, the second part is provided with a second diversion hole which is communicated with the second central hole and the outside of the central tube, the diameter of the top surface of the anchor fluke anchoring cone body is larger than the outer diameter of the second part, the anchor fluke anchoring cone body is provided with a circular truncated cone-shaped outer wall, the lower part of the anchor fluke anchoring cone body is provided with a high-pressure jet hole, and the high-pressure jet hole is communicated with the third central hole and the outside of the central tube;
The upper joint is a cylindrical body, the interior of the upper joint is hollow, and the inner wall of the upper joint is connected with the outer wall of the upper part of the central pipe;
the sliding sleeve fluke comprises a sliding sleeve and a fluke, the sliding sleeve is cylindrical, the sliding sleeve is provided with a first through hole and a second through hole, the inner wall of the first through hole is in contact with the outer wall of the upper connector, a circular ring is arranged on the inner wall between the first through hole and the second through hole, the first through hole and the second through hole are communicated through a central hole of the circular ring, the fluke is connected with the bottom of the sliding sleeve, the upper part of the sliding sleeve fluke is in contact with the upper connector, the inner wall of the circular ring is in contact with the outer wall of the first part and/or the second part, and the lower part of the sliding sleeve fluke is in contact with the outer wall of the fluke-sitting anchor cone;
a hydraulic cylinder working cavity is formed among the bottom surface of the upper joint, the inner wall of the first through hole, the top surface of the circular ring and the outer wall of the central pipe;
a spring working cavity is formed among the bottom surface of the circular ring, the inner wall of the sliding sleeve fluke, the outer wall of the second part and the top surface of the fluke anchoring cone body, and the spring is positioned in the spring working cavity;
the turbine tool rest is connected with the bottom of the anchor fluke anchoring cone body, the turbine tool rest is columnar, and the top surface of the turbine tool rest is a vortex surface;
The cutting knife is connected with the turbine knife rest.
2. The apparatus according to claim 1, wherein a third annular groove is formed in the side wall of the turbine holder, a threaded cutter fixing hole is formed in a top surface of the third annular groove, a first internal thread is formed in the threaded cutter fixing hole, a cutter fixing hole is formed in a bottom surface of the third annular groove, the cutter fixing hole communicates the bottom surface of the third annular groove with the bottom surface of the turbine holder, and an axis of the cutter fixing hole coincides with an axis of the threaded cutter fixing hole.
3. The device according to claim 2, characterized in that the device further comprises at least one first screw, wherein a first external thread is arranged on the at least one first screw, the first external thread is matched with the cutting knife fixing threaded hole, a cutting knife through hole is arranged on each cutting knife, the axis of the cutting knife through hole coincides with the axis of the cutting knife fixing hole, and the first screw sequentially passes through the cutting knife fixing hole and the cutting knife through hole from bottom to top and then is in threaded connection with the cutting knife fixing threaded hole.
4. The device of claim 1, further comprising a nut, wherein the inner wall of the nut is provided with a second internal thread, the bottom of the anchor fluke anchoring cone is a cylinder, and the outer wall of the cylinder is provided with a second external thread, and the second external thread is matched with the second internal thread.
5. The device according to claim 4, characterized in that the turbine cartridge is provided with a third through hole, the axis of which coincides with the axis of the cylindrical body, the diameter of which is greater than or equal to the diameter of the cylindrical body, the latter passing through the third through hole.
6. The device of claim 4, further comprising a pin, wherein the cylinder is provided with a cylindrical through hole, an axis of the cylindrical through hole is perpendicular to an axis of the cylinder, the nut is provided with a first nut through hole and a second nut through hole, the axis of the first nut through hole coincides with the axis of the cylindrical through hole, and the pin penetrates through the first nut through hole, the cylindrical through hole and the second nut through hole.
7. The device according to claim 4, further comprising a bearing, wherein the bearing is provided with a bearing through hole, the bottom surface of the turbine tool holder is provided with a bearing mounting hole, the axis of the bearing mounting hole coincides with the axis of the turbine tool holder, the cylinder is in interference connection with the bearing through hole, and the bearing is in interference connection with the bearing mounting hole.
8. The device of any one of claims 1 to 7, further comprising a first seal member, wherein a first annular groove is provided in an outer wall of the lower portion of the upper fitting, and wherein the first seal member is located in the first annular groove.
9. The device of any one of claims 1 to 7, further comprising a second seal, wherein a second annular groove is provided on the inner wall of the ring, and the second seal is located in the second annular groove.
10. The device of any one of claims 1 to 7, further comprising a stable nail, wherein a third external thread is arranged on a cylindrical part of the stable nail, a stable nail through hole is formed in the upper joint, a stable nail threaded hole is formed in the top of the first part, a third internal thread is arranged in the stable nail threaded hole, the axis of the stable nail through hole coincides with the axis of the stable nail threaded hole, the third external thread is matched with the third internal thread, and the stable nail penetrates through the stable nail through hole and is in threaded connection with the stable nail threaded hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910859758.3A CN112483032B (en) | 2019-09-11 | 2019-09-11 | Cutting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910859758.3A CN112483032B (en) | 2019-09-11 | 2019-09-11 | Cutting device |
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| CN112483032A CN112483032A (en) | 2021-03-12 |
| CN112483032B true CN112483032B (en) | 2022-06-03 |
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| CA2725717A1 (en) * | 2003-01-31 | 2004-08-19 | Weatherford/Lamb, Inc. | Apparatus and methods for drilling a wellbore using casing |
| CN204419097U (en) * | 2015-02-04 | 2015-06-24 | 钟举 | Mechanical internal cutter |
| WO2018174718A1 (en) * | 2016-04-29 | 2018-09-27 | Matias Lien | Method and tool for preparing opening through a casing |
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| CN112483032A (en) | 2021-03-12 |
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