CN113338913A - Auxiliary splitting tool - Google Patents
Auxiliary splitting tool Download PDFInfo
- Publication number
- CN113338913A CN113338913A CN202110621157.6A CN202110621157A CN113338913A CN 113338913 A CN113338913 A CN 113338913A CN 202110621157 A CN202110621157 A CN 202110621157A CN 113338913 A CN113338913 A CN 113338913A
- Authority
- CN
- China
- Prior art keywords
- cantilevers
- pulling
- gasket assembly
- spring gasket
- inner shaft
- 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.)
- Pending
Links
- 238000001125 extrusion Methods 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 description 18
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 4
- 235000017491 Bambusa tulda Nutrition 0.000 description 4
- 241001330002 Bambuseae Species 0.000 description 4
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 4
- 239000011425 bamboo Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Images
Classifications
-
- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/02—Determining slope or direction
- E21B47/022—Determining slope or direction of the borehole, e.g. using geomagnetism
-
- 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
- E21B47/00—Survey of boreholes or wells
-
- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/01—Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines; Protecting measuring instruments in boreholes against heat, shock, pressure or the like
-
- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/01—Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines; Protecting measuring instruments in boreholes against heat, shock, pressure or the like
- E21B47/017—Protecting measuring instruments
Landscapes
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Geophysics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
An assisted detachment tool, comprising: one end of the inner shaft is provided with a radially outward convex extrusion part, and the other end of the inner shaft is provided with a pulling part; and one end of the outer barrel is provided with a plurality of cantilevers which are axially protruded outwards, the cantilevers are arranged at intervals along the circumferential direction of the outer barrel, and any cantilever is provided with a clamping part which is radially protruded outwards. When the spring gasket assembly is disassembled, an underground instrument does not need to be pulled out from a wellhead, the extrusion part directly penetrates through the inner hole of the spring gasket assembly and extends into the shell, the outer cylinder is sleeved on the inner shaft, the plurality of cantilevers penetrate through the inner hole of the spring gasket assembly and extend into the shell, the extrusion part is positioned outside an area defined by the plurality of cantilevers, and the pulling part is positioned at the other end of the outer cylinder; and then pulling the pulling part back to the cantilever, extruding the extruding part to slide into an area enclosed by the cantilevers and radially pressing the cantilevers outwards to enable the clamping parts to move radially outwards to be clamped on an inner hole of the spring gasket assembly, and continuously pulling the pulling part back to the cantilever until the spring gasket assembly is disassembled on the shell.
Description
Technical Field
This paper relates to oil equipment technical field, more specifically relates to an auxiliary splitting instrument.
Background
The utility model provides a down-hole instrument of deviational survey degree, includes casing, spring shim assembly, flows a section of thick bamboo and pulser, installs in the casing after flowing a section of thick bamboo and pulser equipment dress earlier, then puts into the casing with the spring shim assembly and interference mounting on the casing (the hole of casing is the shoulder hole, spring shim assembly interference mounting is on the aperture section of shoulder hole), and the spring shim assembly presses and holds the integrated configuration who flows a section of thick bamboo and pulser. In order to maintain and replace the flow tube and the pulser in the housing, the spring gasket assembly in the lower housing needs to be disassembled, and then the flow tube and the pulser in the lower housing need to be disassembled.
Because the spring gasket assembly is located the position deeply in the casing, the instrument can extrude the spring gasket assembly when going on to detain in the pit, and the instrument can be attached to the spring gasket assembly at the well drilling in-process mud after going into the well in the pit, and these all can increase the degree of difficulty of taking out of spring gasket assembly, cause the spring gasket assembly to take out the process and have following problem:
1. pulling the downhole tool uphole using a lifting tool, although a safety slip has been installed between the lifting tool and the downhole tool, there is still a possibility that the downhole tool may slip off and fall into the well;
2. in the process of disassembling after the underground instrument is pulled out of a wellhead, if the stress of the spring gasket assembly is not uniform, the spring gasket assembly is easy to disassemble and break away, so that part of the spring gasket falls into the inside of the shell and the broken fragments of the spring gasket fall into the inside of the shell, the broken fragments are difficult to take out, the damage to the inside of the underground instrument can be caused in the mud circulation process, and the disassembling difficulty of the pulser and the flow cylinder can be increased.
Disclosure of Invention
The embodiment of the invention provides an auxiliary disassembling tool, which is more beneficial to realizing the disassembly of a lower spring gasket assembly on a shell.
The auxiliary splitting tool provided by the embodiment of the invention is used for disassembling a lower spring gasket assembly on a shell, and comprises: the inner shaft is provided with a radially outward convex extrusion part at one end and a pulling part at the other end; the outer barrel is provided with a plurality of axially outwards-protruding cantilevers at one end, the cantilevers are arranged at intervals along the circumferential direction of the outer barrel, and any cantilever is provided with a radially outwards-protruding clamping part; when the spring gasket assembly is disassembled, the extrusion part penetrates through the inner hole of the spring gasket assembly and extends into the shell, the outer barrel is sleeved on the inner shaft, the cantilevers penetrate through the inner hole of the spring gasket assembly and extend into the shell, the extrusion part is positioned outside the area defined by the cantilevers, the pulling part is positioned at the other end of the outer barrel and pulls the pulling part back to the cantilevers, so that the extrusion part is extruded and slides into the area defined by the cantilevers and radially presses the cantilevers outwards, and the clamping parts are clamped on the inner hole of the spring gasket assembly.
In an exemplary embodiment, the auxiliary splitting tool further comprises: and the pulling mechanism is connected with the pulling part and used for pulling the pulling part back to the cantilever.
In an exemplary embodiment, the pulling mechanism includes: the one end of the lead screw is connected with the pulling and holding part; the nut is screwed on the lead screw; and the driving piece is arranged at the other end of the lead screw and is used for driving the lead screw to rotate.
In an exemplary embodiment, the driving member is a hand lever or a hand wheel or a motor.
In an exemplary embodiment, the pressing portion is an annular boss located on an outer side surface of one end of the inner shaft.
In an exemplary embodiment, a side of the boss facing the cantilever is provided with a guide surface.
In an exemplary embodiment, a plurality of the cantilevers are uniformly distributed along the circumferential direction of the outer cylinder.
In an exemplary embodiment, the number of the cantilevers is 3-9.
In an exemplary embodiment, the inner shaft and the outer barrel are both metal pieces.
In an exemplary embodiment, the spring-washer assembly is interference mounted within the housing.
According to the auxiliary disassembling tool provided by the embodiment of the invention, when the spring gasket assembly is disassembled, the underground instrument does not need to be pulled out from a wellhead, and the problem that the underground instrument slips and falls into a well can be avoided. When the spring gasket assembly is disassembled, the extrusion part directly penetrates through an inner hole of the spring gasket assembly to extend into the shell, the outer cylinder is sleeved on the inner shaft, the cantilevers penetrate through the inner hole of the spring gasket assembly to extend into the shell, the extrusion part is positioned outside an area defined by the cantilevers, and the pulling part is positioned at the other end of the outer cylinder; and then, pulling the pulling part back to the cantilever, extruding the extruding part to slide into an area enclosed by the cantilevers and radially pressing the cantilevers outwards, so that the clamping parts move radially outwards to be clamped on an inner hole of the spring gasket assembly, and continuously pulling the pulling part back to the cantilever until the spring gasket assembly is disassembled on the shell, wherein the disassembling process of the spring gasket assembly is simpler and more convenient.
Furthermore, a plurality of clamping parts arranged at intervals in the circumferential direction are clamped in an inner hole of the spring gasket assembly, stress on each position of the spring gasket assembly is balanced more easily, the spring gasket assembly is not easy to disintegrate, the spring gasket is not easy to crack, the pulser and the flow cylinder are not only more smooth in the disassembling process, but also the underground instrument is not easy to damage in the slurry circulating process.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.
FIG. 1 is a schematic cross-sectional view of an exploded structure of an auxiliary separation tool according to an embodiment of the present invention;
fig. 2 is a perspective view of the outer tub in fig. 1.
Wherein, the correspondence between the reference numbers and the component names in fig. 1 and fig. 2 is:
100 inner shaft, 110 extruding part, 120 pulling part, 200 outer cylinder, 210 cantilever and 211 clamping part.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The auxiliary disassembling tool provided by the embodiment of the invention is used for disassembling the spring gasket assembly on the shell (the spring gasket assembly is arranged in the shell in an interference manner). As shown in fig. 1, the auxiliary splitting tool includes: an inner shaft 100, one end of the inner shaft 100 is provided with a radially convex extrusion part 110, and the other end is provided with a pulling part 120; the outer cylinder 200, one end of the outer cylinder 200 is provided with a plurality of axially convex cantilevers 210, the cantilevers 210 are arranged at intervals along the circumferential direction of the outer cylinder 200, and the free end of any cantilever 210 is provided with a radially convex clamping part 211; when the spring gasket assembly is disassembled, the extrusion part 110 penetrates through the inner hole of the spring gasket assembly and extends into the shell, the outer cylinder 200 is sleeved on the inner shaft 100, the plurality of cantilevers 210 penetrate through the inner hole of the spring gasket assembly and extend into the shell, the extrusion part 110 is positioned outside the area enclosed by the plurality of cantilevers 210, the pulling part 120 is positioned at the other end of the outer cylinder 200, the pulling part 120 is pulled back to the cantilevers 210, the extrusion part 110 is extruded and slides into the area enclosed by the plurality of cantilevers 210 and radially presses the plurality of cantilevers 210 outwards, and the plurality of clamping parts 211 are clamped on the inner hole of the spring gasket assembly. The chucking part 211 may be a claw or a chuck.
This supplementary split instrument when dismantling the spring shim assembly, need not to pull out instrument in the pit at the well head, the instrument slippage problem that falls into the well just can not appear in the pit yet.
When the spring gasket assembly is disassembled, the extrusion part 110 directly penetrates through the inner hole of the spring gasket assembly to extend into the shell, the outer cylinder 200 is sleeved on the inner shaft 100, the plurality of cantilevers 210 penetrate through the inner hole of the spring gasket assembly to extend into the shell, the extrusion part 110 is positioned outside the area enclosed by the plurality of cantilevers 210, and the pulling and holding part 120 is positioned at the other end of the outer cylinder 200; then, the pulling part 120 is pulled back to the cantilever 210, the pressing part 110 is pressed to slide into the area enclosed by the plurality of cantilevers 210 and radially presses the plurality of cantilevers 210 outwards, so that the plurality of clamping parts 211 move radially outwards to be clamped on the outer end face of the lower side of the inner hole of the spring gasket assembly, the pulling part 120 is continuously pulled back to the cantilever 210 until the spring gasket assembly is dismounted on the shell, and the dismounting process of the spring gasket assembly is simpler and more convenient.
Moreover, a plurality of clamping parts 211 arranged at intervals in the circumferential direction are clamped on the outer end face of the lower side of the inner hole of the spring gasket assembly, stress at each position of the spring gasket assembly is more balanced easily, the spring gasket assembly is more difficult to disintegrate, the spring gasket is also more difficult to crack, the dismounting process of the pulser and the flow cylinder is smoother, and the underground instrument is also more difficult to damage in the slurry circulation process.
Further, as shown in fig. 1, the outer side surface of the inner shaft 100 and the inner side surface of the outer cylinder 200 are provided with mutually matched shaft shoulders, the side surfaces of the two shaft shoulders are in contact with each other, so that the axial force transmission can be better performed, and the inner shaft 100 and the outer cylinder 200 are less prone to damage.
In an exemplary embodiment, the auxiliary splitting tool further comprises: a pulling mechanism (not shown) connected to the pulling portion 120 for pulling the pulling portion 120 away from the cantilever 210 (i.e. to pull the inner shaft 100 to move axially) to remove the spring washer assembly from the housing.
Illustratively, the pulling mechanism includes: a lead screw, the lower end of which is connected with the pulling part 120; the nut is screwed on the screw rod (the nut can be fixed on the female buckle of the shell); and the driving piece is arranged at the upper end of the screw rod and used for driving the screw rod to rotate. The nut is fixed during disassembly and the drive member then drives the lead screw to rotate, which in turn carries the inner shaft 100 to move axially away from the cantilever 210. The purpose of the present application can be achieved by the driving element being a hand lever, a hand wheel, or a motor, etc., and the purpose of the driving element does not depart from the design concept of the present invention, and therefore, the driving element will not be described herein again and shall fall within the protection scope of the present application.
In an exemplary embodiment, as shown in fig. 1, the pressing portion 110 is an annular boss located on an outer side surface of the lower end of the inner shaft 100. Moreover, the upper side of the boss facing the cantilever 210 is provided with a guide surface, which is more beneficial to the boss to be extruded and slid into the area enclosed by the plurality of cantilevers 210.
In an exemplary embodiment, as shown in fig. 1 and 2, the plurality of cantilevers 210 are uniformly distributed along the circumference of the outer cylinder 200, the force generated in the process of removing the spring gasket assembly is uniformly applied to the spring gasket assembly, the stress at each position of the spring gasket assembly is more balanced, the spring gasket assembly is less prone to being disassembled, the spring gasket is less prone to being broken, the process of removing the pulser and the flow cylinder is smoother, and the downhole instrument is less prone to being damaged in the process of circulating mud.
For example, as shown in fig. 2, the number of the plurality of cantilevers 210 may be 3 to 9, and may be 3, 6, or 9, and the like, and the purpose of the present application can be achieved, and the purpose of the present application does not depart from the design concept of the present invention, and the details are not described herein, and all of the plurality of cantilevers should fall within the protection scope of the present application.
For example, the inner shaft 100 and the outer cylinder 200 are both made of metal, and the metal may be stainless steel with high strength and good corrosion resistance.
The disassembling process of the spring gasket assembly is as follows:
firstly: sleeving the inner shaft 100 and the outer cylinder 200, and enabling the inner shaft 100 and the outer cylinder 200 to be arranged in an inner hole of the spring gasket assembly in a penetrating manner, wherein the extrusion part 110 is positioned outside an area surrounded by a plurality of cantilevers 210, the pulling and holding part 120 extends out of the upper end of the outer cylinder 200 and is connected with the lower end of a screw rod, and a nut screwed on the screw rod is fixed on a female buckle of a shell;
secondly, the method comprises the following steps: rotating the driving member to enable the boss to be extruded upwards and slide into an area enclosed by the plurality of cantilevers 210, and the plurality of cantilevers 210 radially swing outwards under the action of the boss to enable the clamping part 211 to be clamped on the outer end face of the lower side of the inner hole of the spring gasket assembly;
and furthermore: when the driving member continues to rotate, the combined structure of the inner shaft 100, the lead screw and the outer cylinder 200 pulls the spring gasket assembly upwards, so that the spring gasket assembly slowly moves upwards on the shell and is detached;
and finally: and after the spring gasket assembly is disassembled, the nut is disassembled on the female buckle of the shell, and the spring gasket assembly is pulled out upwards from the shell.
In summary, the auxiliary disassembling tool provided by the embodiment of the invention does not need to pull out the downhole instrument at the wellhead when the spring gasket assembly is disassembled, so that the problem that the downhole instrument slips and falls into the well can be solved. When the spring gasket assembly is disassembled, the extrusion part directly penetrates through an inner hole of the spring gasket assembly to extend into the shell, the outer cylinder is sleeved on the inner shaft, the cantilevers penetrate through the inner hole of the spring gasket assembly to extend into the shell, the extrusion part is positioned outside an area defined by the cantilevers, and the pulling part is positioned at the other end of the outer cylinder; and then, pulling the pulling part back to the cantilever, extruding the extruding part to slide into an area enclosed by the cantilevers and radially pressing the cantilevers outwards, so that the clamping parts move radially outwards to be clamped on an inner hole of the spring gasket assembly, and continuously pulling the pulling part back to the cantilever until the spring gasket assembly is disassembled on the shell, wherein the disassembling process of the spring gasket assembly is simpler and more convenient.
And, a plurality of card that hold through circumference interval setting are held on the hole of spring shim assembly, and the stress is more balanced more easily in each position of spring shim assembly, and spring shim assembly is difficult to disintegrate more, and the spring shim is also difficult to cracked, and not only pulser and a stream section of thick bamboo dismantlement process are more smooth, and instrument in the pit also is difficult to damage in mud circulation process moreover.
In the description of the present invention, it should be noted that the terms "upper", "lower", "one side", "the other side", "one end", "the other end", "side", "opposite", "four corners", "periphery", "mouth" structure ", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the structures referred to have specific orientations, are configured and operated in specific orientations, and thus, are not to be construed as limiting the present invention.
In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "connected," "directly connected," "indirectly connected," "fixedly connected," "mounted," and "assembled" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; the terms "mounted," "connected," and "fixedly connected" may be directly connected or indirectly connected through intervening media, or may be connected through two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. An auxiliary splitting tool for disassembling a lower spring shim assembly on a housing, comprising:
the inner shaft is provided with a radially outward convex extrusion part at one end and a pulling part at the other end; and
the outer barrel is provided with a plurality of axially outwards-protruding cantilevers at intervals along the circumferential direction of the outer barrel, and a radially outwards-protruding clamping part is arranged on any one cantilever;
when the spring gasket assembly is disassembled, the extrusion part penetrates through the inner hole of the spring gasket assembly and extends into the shell, the outer barrel is sleeved on the inner shaft, the cantilevers penetrate through the inner hole of the spring gasket assembly and extend into the shell, the extrusion part is positioned outside the area defined by the cantilevers, the pulling part is positioned at the other end of the outer barrel and pulls the pulling part back to the cantilevers, so that the extrusion part is extruded and slides into the area defined by the cantilevers and radially presses the cantilevers outwards, and the clamping parts are clamped on the inner hole of the spring gasket assembly.
2. The auxiliary splitting tool of claim 1, further comprising:
and the pulling mechanism is connected with the pulling part and used for pulling the pulling part back to the cantilever.
3. The assisted disassembly tool of claim 2, wherein the pulling mechanism comprises:
the one end of the lead screw is connected with the pulling and holding part;
the nut is screwed on the lead screw; and
and the driving piece is arranged at the other end of the lead screw and is used for driving the lead screw to rotate.
4. The auxiliary splitting tool of claim 3, wherein the driving member is a hand lever or a hand wheel or a motor.
5. The auxiliary splitting tool of any one of claims 1 to 4, wherein the pressing portion is an annular boss located on an outer side surface of one end of the inner shaft.
6. The auxiliary splitting tool of claim 5, wherein a side of the boss facing the cantilever is provided with a guide surface.
7. The auxiliary splitting tool according to any one of claims 1 to 4, wherein a plurality of the cantilevers are uniformly distributed along the circumference of the outer cylinder.
8. The auxiliary splitting tool according to any one of claims 1 to 4, wherein the number of the cantilevers is 3-9.
9. The auxiliary splitting tool of any one of claims 1 to 4, wherein the inner shaft and the outer cylinder are both metallic pieces.
10. The assisted disassembly tool of any of claims 1 to 4, wherein the spring-washer assembly is interference-mounted within the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110621157.6A CN113338913A (en) | 2021-06-03 | 2021-06-03 | Auxiliary splitting tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110621157.6A CN113338913A (en) | 2021-06-03 | 2021-06-03 | Auxiliary splitting tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113338913A true CN113338913A (en) | 2021-09-03 |
Family
ID=77475322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110621157.6A Pending CN113338913A (en) | 2021-06-03 | 2021-06-03 | Auxiliary splitting tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113338913A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2562937Y (en) * | 2002-08-23 | 2003-07-30 | 重庆力帆实业（集团）有限公司 | Dismantling device for engine bearing |
| EP2066478A1 (en) * | 2006-09-20 | 2009-06-10 | Ab Skf | Gripping device |
| CN104097180A (en) * | 2014-07-03 | 2014-10-15 | 莱芜钢铁集团有限公司 | Sleeve extracting device |
| CN107322529A (en) * | 2017-08-31 | 2017-11-07 | 中车石家庄车辆有限公司 | Needle bearing, which is moved back, unloads device |
-
2021
- 2021-06-03 CN CN202110621157.6A patent/CN113338913A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2562937Y (en) * | 2002-08-23 | 2003-07-30 | 重庆力帆实业（集团）有限公司 | Dismantling device for engine bearing |
| EP2066478A1 (en) * | 2006-09-20 | 2009-06-10 | Ab Skf | Gripping device |
| CN104097180A (en) * | 2014-07-03 | 2014-10-15 | 莱芜钢铁集团有限公司 | Sleeve extracting device |
| CN107322529A (en) * | 2017-08-31 | 2017-11-07 | 中车石家庄车辆有限公司 | Needle bearing, which is moved back, unloads device |
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Application publication date: 20210903 |