CN115711099A - Vertical feed type hydraulic oil pipe internal cutting knife - Google Patents
Vertical feed type hydraulic oil pipe internal cutting knife Download PDFInfo
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- CN115711099A CN115711099A CN202110970213.7A CN202110970213A CN115711099A CN 115711099 A CN115711099 A CN 115711099A CN 202110970213 A CN202110970213 A CN 202110970213A CN 115711099 A CN115711099 A CN 115711099A
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- 238000005520 cutting process Methods 0.000 title claims abstract description 56
- 239000010720 hydraulic oil Substances 0.000 title claims abstract description 17
- 230000006835 compression Effects 0.000 claims description 9
- 238000007906 compression Methods 0.000 claims description 9
- 239000003921 oil Substances 0.000 abstract description 32
- 239000007788 liquid Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 210000000664 rectum Anatomy 0.000 description 1
- 239000010913 used oil Substances 0.000 description 1
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Abstract
The invention relates to the technical field of cutting tools in oil casings, in particular to a vertical feed type hydraulic oil pipe internal cutting knife which comprises an upper joint, a shell, a knife rest, a knife pushing block and a knife shaft, wherein the inner side of the lower end of the upper joint is fixedly installed with the outer side of the upper end of the shell with a tubular structure, and the knife shaft with the lower end sleeved on the inner side of the lower part of the shell is installed on the inner side of the upper part of the upper joint in a vertically sliding mode. The invention has reasonable and compact structure and convenient use, the tool rest is used as a tool handle, is thick, stable and heavy, is not easy to deform, avoids the occurrence of jamming when the tool is taken out of or withdrawn from the tool, has the advantages of the shortest feeding distance and the smallest feeding resistance when the tool bit is vertically fed relative to an oil pipe to be cut, has small energy required by cutting and short time for cutting the oil pipe, can wash and cool the tool bit by circulating liquid during the cutting period by arranging a flow passage, improves the cutting quality, has the resetting function after the tool bit shaft is moved downwards, automatically recovers the tool bit, ensures that the tool bit realizes the up-and-down reciprocating motion, and has the characteristics of safety, labor saving, simplicity, convenience and high efficiency.
Description
Technical Field
The invention relates to the technical field of cutting tools in oil casings, in particular to a vertical feed type hydraulic oil pipe internal cutting knife.
Background
In the operation process of an oil-water well, the situation that an oil pipe is blocked and cannot be lifted is often encountered, the used oil pipe is basically phi 73mm oil pipe or phi 89mm oil pipe, at the moment, the oil pipe above the clamping point needs to be disconnected in a back-off mode or a cutting mode, and then the next step of fishing operation is carried out. The back-off has the problems of large error of back-off position, back loosening of the whole well oil pipe and the like, so that the later fishing is complicated; the problems of difficult ground torque transmission, difficult control of the pressure tonnage, large burden on a torque transmission pipe rod and the like exist in mechanical cutting; the explosive cutting has the problems of high cost, incapability of cutting in a horizontal well and requirement of professional team construction; the cutting feed route of the conventional hydraulic cutting knife is an arc line, the feed distance is long, the feed resistance is large, the knife is easy to cut, and the like.
Disclosure of Invention
The invention provides a vertical feed type hydraulic oil pipe internal cutting knife, overcomes the defects of the prior art, and can effectively solve the problems of long feed distance, large feed resistance, easy cutting and complex cutting of the existing oil pipe cutting.
The technical scheme of the invention is realized by the following measures: a vertical feed type hydraulic oil pipe internal cutting knife comprises an upper joint, a shell, knife rests, knife pushing blocks and knife shafts, wherein the inner side of the lower end of the upper joint is fixedly installed with the outer side of the upper end of the shell of a tubular structure, the inner side of the upper part of the upper joint is provided with the knife shafts of which the lower ends are sleeved on the inner side of the lower part of the shell in an up-and-down sliding mode, the upper center of each knife shaft is provided with a flow channel which is communicated up and down, the outer side of the lower end of the shell is uniformly provided with a plurality of strip-shaped sliding holes which are communicated in the radial direction at intervals, each knife rest is installed in each sliding hole in a sliding mode in the radial direction, one side of each knife rest, far away from each knife shaft, is fixedly provided with a knife head, one side of each knife rest, close to each knife shaft, is vertically distributed with a plurality of knife pushing grooves which are inclined from the outside to the inside from the bottom to the top, when the outer side of the knife shaft, which corresponds to each knife pushing groove is arranged, the knife rest can move downwards, the knife pushing blocks enable the knife heads to extend out of the shell can extend out from the outer side of the upper part of each knife shaft, and the inner side of the upper part of the shell are provided with a compression spring.
The following are further optimization or/and improvement on the technical scheme of the invention:
the upper joint can be internally provided with an upper connecting hole, an upper guide hole, an upper sliding hole and a lower connecting hole which are sequentially communicated from top to bottom, the outer side of the upper end of the cutter shaft is sleeved in the upper guide hole, the upper connecting hole and the lower connecting hole are internally provided with connecting threads, the outer side of the upper end of the shell is screwed in the lower connecting hole, the outer side of the upper part of the cutter shaft corresponding to the upper position of the shell is fixedly provided with an upper locking ring sleeved in the sliding hole, the shell is internally provided with a lower sliding hole, a push cutter hole and a lower guide hole, the diameters of the lower sliding hole and the lower sliding hole are sequentially reduced from top to bottom, the lower part of the lower sliding hole is provided with a lower locking ring sleeved on the outer side of the middle outer side of the cutter shaft, the outer side of the lower part of the cutter shaft is sleeved in the lower guide hole by a compression spring, and the push cutter block is fixed on the outer side of the cutter shaft positioned in the push cutter hole.
The distance between the lower end face of the upper lock ring and the upper end face of the shell can be a first distance, the distance from the tool rest to the side, away from the tool shaft, of the tool rest moving outwards in the radial direction to the outside of the shell is a second distance, and the second distance is not larger than the first distance.
The diameter of the lower sliding hole may be smaller than the diameter of the upper sliding hole and larger than the diameter of the upper guide hole.
The upper locking ring can be screwed on the outer side of the upper part of the cutter shaft, at least one upper positioning screw hole which is radially communicated is distributed on the outer side of the upper locking ring at intervals along the circumferential direction, the outer side of the cutter shaft corresponding to the position of each upper positioning screw hole is provided with an upper positioning groove, and an upper positioning screw with the inner end positioned in the upper positioning groove corresponding to the position is screwed in each upper positioning screw hole.
At least one lower positioning screw hole which is radially communicated can be distributed on the outer side of the lower end of the upper joint at intervals along the circumferential direction, a lower positioning groove is arranged on the outer side of the upper part of the shell corresponding to each lower positioning screw hole, and a lower positioning screw with the inner end positioned in the lower positioning groove corresponding to each lower positioning screw hole is screwed in each lower positioning screw hole.
The outer side of the lower end of the shell can be provided with a conical guide surface with a big top and a small bottom.
The thickness of the tool holder in the radial direction may be larger than the depth of the slide hole in the radial direction.
The invention has reasonable and compact structure and convenient use, the tool rest is used as a tool handle, is thick, stable and heavy, is not easy to deform, avoids the occurrence of jamming when the tool is taken out of or withdrawn from the tool, has the advantages of the shortest feeding distance and the smallest feeding resistance when the tool bit is vertically fed relative to an oil pipe to be cut, has small energy required by cutting and short time for cutting the oil pipe, can wash and cool the tool bit by circulating liquid during the cutting period by arranging a flow passage, improves the cutting quality, has the resetting function after the tool bit shaft is moved downwards, automatically recovers the tool bit, ensures that the tool bit realizes the up-and-down reciprocating motion, and has the characteristics of safety, labor saving, simplicity, convenience and high efficiency.
Drawings
FIG. 1 is a schematic sectional view of the present invention.
FIG. 2 is an enlarged cross-sectional view taken along line A-A of FIG. 1.
Fig. 3 is a schematic sectional view of the cutter shaft moving downward.
The codes in the figures are respectively: 1 is an upper joint, 2 is a shell, 3 is a tool rest, 4 is a push broach block, 5 is a cutter shaft, 6 is a tool bit, 7 is a runner, 8 is a push broach slot, 9 is a compression spring, 10 is an upper connecting hole, 11 is an upper guide hole, 12 is an upper sliding hole, 13 is a lower connecting hole, 14 is a lower sliding hole, 15 is a cutter pushing hole, 16 is a lower guide hole, 17 is an upper locking ring, 18 is a lower locking ring, 19 is an upper positioning screw, 20 is a lower positioning screw, 21 is a guide surface, and 22 is an oil pipe.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention.
In the present invention, for convenience of description, the description of the relative position relationship of the components is described according to the layout mode of the attached drawing 1 in the specification, such as: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of the drawings of the specification.
The invention is further described with reference to the following examples and figures:
as shown in fig. 1, 2 and 3, the vertical feed type hydraulic oil pipe internal cutting knife comprises an upper joint 1, a housing 2, a knife rest 3, a push-type knife block 4 and a knife shaft 5, wherein the inner side of the lower end of the upper joint 1 is fixedly installed with the outer side of the upper end of the tubular housing 2, the inner side of the upper part of the upper joint 1 is provided with the knife shaft 5 of which the lower end is sleeved on the inner side of the lower part of the housing 2 in a vertical sliding manner, the center of the upper end of the knife shaft 5 is provided with a vertically through flow channel 7, the outer side of the lower end of the housing 2 is uniformly provided with a plurality of radially through bar-shaped slide holes at intervals along the circumference, the knife rest 3 is installed in each slide hole in a radial sliding manner, the knife rest 3 is fixedly provided with the knife head 6 on the side of the knife rest 3 far away from the knife shaft 5, the knife rest 3 is provided with a plurality of push-type knife grooves 8 which are vertically spaced from the outside to inside from the inside and inclined from the bottom to the inside, the outside when the outer side of the knife shaft 5 corresponding to the position of each push-type knife shaft 8 is fixedly provided with the knife rest 3, the knife block 4 which can move along the knife rest 3 and can move along the radial direction when the knife head 6 can move downwards, so that the knife block 4 can extend out of the housing 2, and the knife block 4 can extend out when the knife head 6 to the housing 2, and a compression spring 9 is arranged between the outer side of the inner side of the upper part of the inner side of the upper part of the housing 2.
According to the requirement, the cross section of the slide hole is rectangular and the number is three, two push broach slots 8 which are inclined from outside to inside from bottom to top are distributed on one side of the cutter frame 3 close to the cutter shaft 5 at intervals from top to bottom, each push broach block 4 is matched with the push broach slot 8 at the corresponding position, the three cutter frames 3 synchronously extend out or retract, so that the cutter heads 6 cut the same cross section, the stress on the wall of the oil pipe 22 is uniform, the cutter is not easy to be cut, the cutting efficiency and the success rate are high, the cutting operation of the oil pipe 22 can be completed only by 1 cutter head 6 in a good condition, one side of the cutter frame 3 far away from the cutter shaft 5 is provided with a mounting groove, the tail parts of the cutter heads 6 are embedded in the mounting groove, all the cutter heads 6 are uniformly distributed along the circumference, the cutting surfaces of all the cutter heads 6 are perpendicular to the central axis of the cutter shaft 5, the cutter heads 6 are made of triangular hard alloy (such as YG 8), and have certain impact resistance and abrasion resistance, the requirement of meeting the high rotating speed requirement of a conventional screw rod, the oil pipe 22 is stably cut, the cutting success rate is high, the preset pressure of the compression spring 9 can be 100N, and the cutter frames 3 and the cutter heads 6 can be completely retract into the shell 2 under the non-working state. The cutter frame 3 is used as a cutter handle, is thick, firm and heavy, is not easy to deform, avoids blockage caused by cutter withdrawal or cutter withdrawal, the cutter head 6 is vertically fed relative to an oil pipe 22 to be cut, the feeding distance is shortest, the feeding resistance is minimum, the energy required for cutting is small, the time for cutting the oil pipe 22 is short (about 5-8 minutes), through arranging the flow passage 7, high-speed fluid can generate throttling pressure difference when passing through the flow passage 7, axial downward force is generated on the cutter shaft 5, the cutter shaft 5 moves downwards, circulating liquid can wash and cool the cutter head 6 during cutting, the cutting quality is improved, the compression spring 9 can play a role in resetting after moving the cutter shaft 5 downwards, and the cutter head 6 automatically recovers to enable the cutter shaft 5 to reciprocate up and down.
During the use, after the oil pipe latus rectum is scraped, connect cutting tubular column, the tubular column structure: the method comprises the following steps that an oil pipe, a continuous oil pipe, a hollow sucker rod, a normally open valve, an anchor, a screw drill, a cutting knife stabilizer and a hydraulic cutting knife are pressed in a positive circulation mode from the inside of the oil pipe to a designed cutting position, and the anchor ensures that a cutting point does not axially move in the cutting process; the cutting knife stabilizer forcibly centralizes the rotating hydraulic cutting knife to ensure that the cutting knife rotates stably basically without obvious radial vibration; the normally open valve ensures the balance of the pressure difference inside and outside the well entering pipe column, and the oil pipe is normally drained during tripping, so that the water drilling is avoided.
The vertical feed type hydraulic oil pipe internal cutting knife can be further optimized or/and improved according to actual requirements:
as shown in fig. 1, 2 and 3, an upper connecting hole 10, an upper guide hole 11, an upper sliding hole 12 and a lower connecting hole 13 are arranged in an upper joint 1 and sequentially communicated from top to bottom, the outer side of the upper end of a cutter shaft 5 is sleeved in the upper guide hole 11, connecting threads are arranged in the upper connecting hole 10 and the lower connecting hole 13, the outer side of the upper end of a shell 2 is screwed in the lower connecting hole 13, an upper locking ring 17 sleeved in the sliding hole is fixedly arranged on the outer side of the upper part of the cutter shaft 5 corresponding to the upper position of the shell 2, a lower sliding hole 14, a cutter pushing hole 15 and a lower guide hole 16 are arranged in the shell 2, the diameters of the lower sliding hole 14, the cutter pushing hole 15 and the lower guide hole 16 are sequentially reduced from top to bottom, a lower locking ring 18 is sleeved on the outer side of the cutter shaft 5 corresponding to the upper position of the lower locking ring 18, a compression spring 9 is sleeved on the outer side of the cutter shaft 5 between the upper side of the lower locking ring 18 and the lower side of the upper locking ring 17, and a cutter pushing block 4 is fixed on the outer side of the cutter shaft 5 positioned in the cutter pushing hole 15.
In the use, through setting up guiding hole 11 and lower guiding hole 16, can play the direction to arbor 5 and right the effect, make tool bit 6 take place the eccentric wear when preventing arbor 5 skew, can increase of service life, go up the snap ring 17 and contact with casing 2 upper end after the lapse, can also prevent that arbor 5 from unexpected lapse back tool bit 6 stretches out casing 2 fish tail oil pipe 22 inner wall, can improve the reliability. Can be applied to cutting operation of the oil pipe 22 of a slant well and a horizontal well.
As shown in fig. 1, 2 and 3, the distance between the lower end surface of the upper lock ring 17 and the upper end surface of the housing 2 is a first distance, and the distance when the tool post 3 moves radially outward until the side of the tool post 3 away from the arbor 5 is flush with the outer side of the housing 2 is a second distance which is not greater than the first distance.
In the use, through such setting, can guarantee the physical dimension of tool bit 6, prevent that the second distance undersize and reduce the size of tool bit 6 and then reduce the performance of tool bit 6, can also guarantee simultaneously that second tool bit 6 stretches out the oil pipe 22 of the different specifications of casing 2 outside cutting, increase its application scope.
As shown in fig. 1, 2 and 3, the diameter of the lower slide hole 14 is smaller than the diameter of the upper slide hole 12 and larger than the diameter of the upper guide hole 11.
In the using process, the diameter of the lower sliding hole 14 is smaller than that of the upper sliding hole 12, the lower end face of the upper locking ring 17 contacts with the upper end face of the shell 2 in the moving-down process, the upper locking ring 17 can be limited, the diameter of the lower sliding hole 14 is larger than that of the upper guide hole 11, namely, the diameter of the upper sliding hole 12 is larger than that of the upper guide hole 11, throttling pressure difference can be generated when high-speed fluid flows into the runner 7 in the center of the upper end of the cutter shaft 5 through the upper connecting hole 10 and the upper guide hole 11, axial downward force is generated on the cutter shaft 5, the cutter shaft 5 moves downwards, the cutter head 6 extends out of the shell 2 and abuts against the inner wall of the oil pipe 22 after the cutter head 3 is pushed to move outwards through the cutter pushing block 4, and then the oil pipe 22 is cut by rotating the upper connector 1.
As shown in fig. 1, 2 and 3, the upper lock ring 17 is screwed on the outer side of the upper part of the cutter shaft 5, at least one upper positioning screw hole which is radially through is circumferentially distributed on the outer side of the upper lock ring 17 at intervals, an upper positioning groove is arranged on the outer side of the cutter shaft 5 corresponding to each upper positioning screw hole, and an upper positioning screw 19 with the inner end positioned in the upper positioning groove corresponding to each upper positioning screw hole is screwed in each upper positioning screw hole.
In the use process, the upper positioning screws 19 are arranged, so that the connection strength of the upper locking ring 17 and the cutter shaft 5 can be improved, and the phenomenon of tripping between the upper locking ring 17 and the cutter shaft 5 in the use process is prevented.
As shown in fig. 1, 2 and 3, at least one lower positioning screw hole penetrating in the radial direction is circumferentially distributed at intervals on the outer side of the lower end of the upper joint 1, a lower positioning groove is formed in the outer side of the upper portion of the shell 2 corresponding to the position of each lower positioning screw hole, and a lower positioning screw 20, the inner end of which is located in the corresponding lower positioning groove, is screwed in each lower positioning screw hole.
In the using process, the lower positioning screw 20 is arranged, so that the connecting strength of the shell 2 and the upper connector 1 can be improved, and the phenomenon of tripping between the upper connector 1 and the shell 2 in the using process is prevented.
As shown in fig. 1, 2 and 3, the outer side of the lower end of the housing 2 is provided with a conical guide surface 21 with a large upper part and a small lower part.
In the use, through such setting, casing 2 plays the guide effect when going into oil pipe 22 down, prevents to take place the jam with oil pipe 22 inner wall, can also avoid oil pipe 22 to cut off the back dislocation sticking of boring.
As shown in fig. 1, 2, and 3, the thickness of the tool holder 3 in the radial direction is larger than the depth of the slide hole in the radial direction.
In the use process, through the arrangement, the contact surface of the tool rest 3 and the inner wall of the slide hole can be kept long enough, the stability of the tool rest 3 in the radial moving process is ensured, and meanwhile, the tool bit 6 can be ensured to have a leakage height long enough to facilitate the cutting of oil pipes 22 with different wall thicknesses.
The technical characteristics form the embodiment of the invention, the embodiment has strong adaptability and implementation effect, and unnecessary technical characteristics can be increased or decreased according to actual requirements to meet the requirements of different situations.
Claims (9)
1. A vertical feed type hydraulic oil pipe internal cutting knife is characterized by comprising an upper joint, a shell, a knife rest, a knife pushing block and a knife shaft, wherein the inner side of the lower end of the upper joint is fixedly installed with the outer side of the upper end of the shell of a tubular structure, the inner side of the upper part of the upper joint is provided with the knife shaft of which the lower end is sleeved on the inner side of the lower part of the shell in a vertically sliding mode, the center of the upper end of the knife shaft is provided with a vertically through flow channel, the outer side of the lower end of the shell is uniformly provided with a plurality of radially through bar-shaped slide holes at intervals along the circumference, the knife rest is installed in each slide hole in a radially sliding mode, one side of the knife rest far away from the knife shaft is fixedly provided with a knife head, one side of the knife rest close to the knife shaft is vertically distributed with a plurality of knife pushing grooves inclined from outside to inside from bottom to top at intervals, the outer side of the lower part of the knife rest corresponding to the position of each knife pushing groove is fixedly provided with the knife pushing block, the knife rest capable of enabling the knife rest to move outwards along the knife shaft and enabling the knife head to extend out of the shell when the knife head to move downwards, and a compression spring is arranged between the outer side of the upper part of the shell.
2. The vertical feed type hydraulic oil pipe internal cutting knife according to claim 1, wherein the upper joint is provided with an upper connecting hole, an upper guide hole, an upper slide hole and a lower connecting hole which are sequentially communicated from top to bottom, the outer side of the upper end of the cutter shaft is sleeved in the upper guide hole, the upper connecting hole and the lower connecting hole are provided with connecting threads, the outer side of the upper end of the housing is screwed in the lower connecting hole, the outer side of the upper part of the cutter shaft corresponding to the upper position of the housing is fixedly provided with an upper locking ring sleeved in the slide hole, the housing is provided with a lower slide hole, a push cutter hole and a lower guide hole which are sequentially reduced in diameter from top to bottom, the lower part of the lower slide hole is provided with a lower locking ring sleeved on the outer side of the middle part of the cutter shaft, the outer side of the lower part of the cutter shaft is sleeved in the lower guide hole, the compression spring is sleeved on the outer side of the cutter shaft between the upper side of the lower locking ring and the lower side of the upper locking ring, and the push cutter block is fixed on the outer side of the cutter shaft positioned in the push cutter hole.
3. The vertical feed type hydraulic oil pipe internal cutting knife according to claim 2, wherein the distance between the lower end surface of the upper lock ring and the upper end surface of the housing is a first distance, and the distance when the knife rest moves radially outward until the side of the knife rest away from the knife shaft is flush with the outside of the housing is a second distance which is not greater than the first distance.
4. The vertical feed hydraulic oil pipe internal cutting knife according to claim 2 or 3, wherein the diameter of the lower sliding hole is smaller than that of the upper sliding hole and larger than that of the upper guide hole.
5. The vertical feed type hydraulic oil pipe internal cutting knife according to claim 2 or 3, characterized in that the upper locking ring is screwed on the outer side of the upper part of the cutter shaft, at least one upper positioning screw hole which is through in the radial direction is distributed on the outer side of the upper locking ring at intervals along the circumferential direction, the outer side of the cutter shaft corresponding to the position of each upper positioning screw hole is provided with an upper positioning groove, and an upper positioning screw with the inner end positioned in the upper positioning groove at the corresponding position is screwed in each upper positioning screw hole; or/and at least one lower positioning screw hole which is radially communicated is distributed on the outer side of the lower end of the upper joint at intervals along the circumferential direction, a lower positioning groove is arranged on the outer side of the upper part of the shell corresponding to each lower positioning screw hole, and a lower positioning screw with the inner end positioned in the lower positioning groove corresponding to each lower positioning screw hole is screwed in each lower positioning screw hole.
6. The vertical feed type hydraulic oil pipe internal cutting knife according to claim 4, characterized in that the upper locking ring is screwed on the outer side of the upper part of the cutter shaft, at least one upper positioning screw hole which is through in the radial direction is distributed on the outer side of the upper locking ring along the circumferential direction at intervals, the outer side of the cutter shaft corresponding to the position of each upper positioning screw hole is provided with an upper positioning groove, and an upper positioning screw of which the inner end is positioned in the upper positioning groove at the corresponding position is screwed in each upper positioning screw hole; or/and at least one lower positioning screw hole which is radially communicated is distributed on the outer side of the lower end of the upper joint at intervals along the circumferential direction, a lower positioning groove is arranged on the outer side of the upper part of the shell corresponding to each lower positioning screw hole, and a lower positioning screw with the inner end positioned in the lower positioning groove corresponding to each lower positioning screw hole is screwed in each lower positioning screw hole.
7. The vertical feed type hydraulic oil pipe internal cutting knife according to claim 2, 3 or 6, characterized in that the outer side of the lower end of the housing is provided with a conical guide surface with a large upper part and a small lower part; or/and the thickness of the tool rest in the radial direction is larger than the depth of the slide hole in the radial direction.
8. The vertical feed type hydraulic oil pipe internal cutting knife as claimed in claim 4, wherein the outer side of the lower end of the housing is provided with a tapered guide surface with a large upper part and a small lower part; or/and the thickness of the tool rest in the radial direction is larger than the depth of the slide hole in the radial direction.
9. The vertical feed type hydraulic oil pipe internal cutting knife according to claim 5, wherein the outer side of the lower end of the housing is provided with a conical guide surface with a large upper part and a small lower part; or/and the thickness of the tool rest in the radial direction is larger than the depth of the slide hole in the radial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110970213.7A CN115711099A (en) | 2021-08-23 | 2021-08-23 | Vertical feed type hydraulic oil pipe internal cutting knife |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110970213.7A CN115711099A (en) | 2021-08-23 | 2021-08-23 | Vertical feed type hydraulic oil pipe internal cutting knife |
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| CN115711099A true CN115711099A (en) | 2023-02-24 |
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| CN202110970213.7A Pending CN115711099A (en) | 2021-08-23 | 2021-08-23 | Vertical feed type hydraulic oil pipe internal cutting knife |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5791409A (en) * | 1996-09-09 | 1998-08-11 | Baker Hughes Incorporated | Hydro-mechanical multi-string cutter |
| CN201943620U (en) * | 2011-02-10 | 2011-08-24 | 天合石油集团汇丰石油装备股份有限公司 | Multilayer casing pipe cutting knife |
| CN102322234A (en) * | 2011-10-09 | 2012-01-18 | 山东正元地质资源勘查有限责任公司烟台分公司 | Sliding block guiding hydraulic cutting knife |
| CN202381009U (en) * | 2011-11-25 | 2012-08-15 | 中国石油天然气集团公司 | Hydraulic machinery inner cutter body cutting device |
| CN204312002U (en) * | 2014-11-19 | 2015-05-06 | 中国地质科学院勘探技术研究所 | A kind of waterpower internal cutter cutting accident drill rod |
| CN206769859U (en) * | 2017-05-09 | 2017-12-19 | 深圳市远东石油钻采工程有限公司 | It is a kind of that there is the deep water casing cutting device for cutting off display function |
| CN111219159A (en) * | 2020-03-25 | 2020-06-02 | 无锡锡钻地质装备有限公司 | Drill rod cutter |
-
2021
- 2021-08-23 CN CN202110970213.7A patent/CN115711099A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5791409A (en) * | 1996-09-09 | 1998-08-11 | Baker Hughes Incorporated | Hydro-mechanical multi-string cutter |
| CN201943620U (en) * | 2011-02-10 | 2011-08-24 | 天合石油集团汇丰石油装备股份有限公司 | Multilayer casing pipe cutting knife |
| CN102322234A (en) * | 2011-10-09 | 2012-01-18 | 山东正元地质资源勘查有限责任公司烟台分公司 | Sliding block guiding hydraulic cutting knife |
| CN202381009U (en) * | 2011-11-25 | 2012-08-15 | 中国石油天然气集团公司 | Hydraulic machinery inner cutter body cutting device |
| CN204312002U (en) * | 2014-11-19 | 2015-05-06 | 中国地质科学院勘探技术研究所 | A kind of waterpower internal cutter cutting accident drill rod |
| CN206769859U (en) * | 2017-05-09 | 2017-12-19 | 深圳市远东石油钻采工程有限公司 | It is a kind of that there is the deep water casing cutting device for cutting off display function |
| CN111219159A (en) * | 2020-03-25 | 2020-06-02 | 无锡锡钻地质装备有限公司 | Drill rod cutter |
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