CN112127823A - Integrated multi-cutter hydraulic cutter - Google Patents
Integrated multi-cutter hydraulic cutter Download PDFInfo
- Publication number
- CN112127823A CN112127823A CN202010357271.8A CN202010357271A CN112127823A CN 112127823 A CN112127823 A CN 112127823A CN 202010357271 A CN202010357271 A CN 202010357271A CN 112127823 A CN112127823 A CN 112127823A
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- CN
- China
- Prior art keywords
- mandrel
- cutter body
- cutter
- blade
- wall
- 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
- 238000007789 sealing Methods 0.000 claims description 13
- 239000010985 leather Substances 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 239000004576 sand Substances 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- 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
Abstract
The invention provides an integrated multi-cutter hydraulic cutting knife, wherein a mandrel is arranged in a knife body, a reversing track is arranged on the outer wall of the upper part of the mandrel, a guide pin penetrates through the outer wall of the knife body and is movably connected with the reversing track, a spring step is arranged at the mandrel below the reversing track, a thrust bearing is arranged below the spring step, a spring is arranged between the thrust bearing and a knife body limiting step arranged on the inner wall of the knife body, a mandrel limiting step is arranged in the middle of the mandrel above the knife body limiting step, a blade group is arranged along the circumferential direction of the lower part of the knife body, a guide block is fixed on the lower part of the mandrel through a fixed pin, knife handle grooves matched with the blade group are uniformly arranged on the outer wall of the mandrel, a limiting joint is arranged at the tail end of the mandrel, and the. The three blade sets can be freely switched by utilizing the reversing track and the guide pin, and the blades can be opened and contracted by utilizing hydraulic throttling pressure and a spring.
Description
Technical Field
The invention relates to the technical field of petroleum or natural gas drilling, well completion and cutting devices, in particular to an integrated multi-cutter hydraulic cutting knife.
Background
The method is characterized in that the old well is required to be reconstructed and rebuilt at the middle and later stages along with the oil exploration and development of the Bohai sea oil field, the operation of large well repair is continuously increased, most wells of the Bohai sea oil field are sand control wells, the later-stage well repair is required to cut and salvage sand control pipe columns, the existing cutting sand control pipe columns are single-blade hydraulic cutting knives, the blades are seriously worn after each cutting and cannot be cut secondarily, the sand control pipe columns are generally more than 200 meters, and the sand control pipe columns can be processed and completed only by cutting and salvage for multiple times.
Disclosure of Invention
The invention overcomes the defects in the prior art and solves the problem of low cutting efficiency of the existing hydraulic cutter, and provides an integrated multi-cutter hydraulic cutter.
The purpose of the invention is realized by the following technical scheme.
An integrated multi-cutter hydraulic cutting knife comprises a knife body, a mandrel, a thrust bearing, a spring, a blade group and a limiting joint, wherein the knife body is of a hollow cylindrical structure, the mandrel is installed in the knife body and is of a hollow cylindrical structure, a reversing track is arranged on the outer wall of the upper portion of the mandrel, a guide pin penetrates through the outer wall of the knife body and is movably connected with the reversing track, a spring step is arranged at the position of the mandrel below the reversing track, the thrust bearing is arranged below the spring step, the spring is arranged between the thrust bearing and a knife body limiting step arranged on the inner wall of the knife body, a mandrel limiting step is arranged in the middle of the mandrel above the knife body limiting step, and the mandrel limiting step and the knife body limiting step are matched to limit the displacement of the mandrel in the downward movement, the cutter blade group along the circumference setting of the lower part of cutter body the outer wall of dabber evenly seted up with blade group assorted handle groove the lower part of dabber is fixed with the guide block through the fixed pin, the guide block with the handle groove is followed the radial of dabber sets gradually from top to bottom, the handle groove with the guide block is used for contacting with one of them blade group in order to realize the free switching of blade group when cutting in the pit the tail end installation of dabber spacing joint, spacing joint with install spacing retaining ring on the lower part inner wall of cutter body cooperatees in order to reach the purpose of restriction displacement that resets.
The nozzle is installed at the head end of the mandrel, a sealing leather cup is installed on the outer side of the head end of the mandrel, and the sealing leather cup and the nozzle are connected with the mandrel through clamp springs.
The quantity of blade group is 3 groups, and 3 blades are installed from top to bottom along the surface of cutter body in proper order to every blade group, and the distance between the adjacent blade equals, the tail end of blade all integratively sets up the handle of a knife, the handle of a knife with handle of a knife groove cooperatees and is used for controlling opening or closing of blade, the blade pass through the round pin axle install in the lower part of cutter body, the round pin axle passes through the backing pin is fixed.
The included angle of the adjacent blade sets in the circumferential direction of the cutter body is 40 degrees.
The number of the cutter handle grooves is 9, the cutter handle grooves are divided into three groups, the number of the guide blocks is 9, the guide blocks are divided into three groups, and the cutter handle grooves and the guide blocks are arranged in a one-to-one correspondence mode.
And sealing rings for sealing are respectively arranged at the upper part and the lower part of the reversing track.
The head end of cutter body passes through the screw thread and links to each other with the top connection.
The tail end of the cutter body is connected with the lower connector through threads, and the tail end of the cutter body is matched with the lower connector to fix the limiting check ring.
The invention has the beneficial effects that: the device is characterized in that three blade sets (each blade set comprises 3 blades) are mounted on one cutter body, the three blade sets can be freely switched by utilizing a reversing track and a guide pin, the blades can be opened and contracted by utilizing hydraulic throttling pressure and a spring, only one blade set is opened for cutting each time, and the other blade set is in a locking state; the problem that the cutting efficiency of the existing hydraulic cutting knife is low is solved, and the safety and high efficiency of operation are ensured; the reversing mechanism adopts a rail type principle and is provided with a thrust bearing, so that the reversing reliability is ensured; the blade is in a locking state in an out-of-operation state, so that the safety of operation is ensured; the device can be applied to cutting of the sand-proof pipe column and can also be applied to cutting and fishing of other oil casings.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a portion of the enlarged structure of A in FIG. 1;
FIG. 3 is a schematic view of a portion of B in FIG. 1;
FIG. 4 is a schematic view of a portion of C in FIG. 1;
FIG. 5 is a schematic view of a blade deployment configuration;
FIG. 6 is a schematic view of the structure of the cutter body according to the present invention
In the figure: the cutter comprises a cutter body, a guide pin, a thrust bearing, a spring, a blade, a mandrel, a guide block, a fixing pin, a limiting joint, a lower joint, a sealing leather cup, a mandrel limiting step, a cutter body limiting step, a pin shaft, a stop pin, a nozzle, a clamp spring, a limiting retainer ring and a cutter handle groove, wherein the cutter body is 1, the cutter body is 2, the guide pin is 3, the thrust bearing is 4, the spring is 5, the blade is 6, the mandrel limiting step is 7, the cutter body limiting step is 14, the pin shaft is 15.
For a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.
Detailed Description
The technical solution of the present invention is further illustrated by the following specific examples.
As shown in fig. 1 to 4, the integral multi-blade hydraulic cutting knife comprises a knife body 2, a mandrel 7, a thrust bearing 4, a spring 5, a blade set and a limit joint 10, wherein the knife body 2 is of a hollow cylindrical structure, the mandrel 7 is installed in the knife body 2, the mandrel 7 is of a hollow cylindrical structure, a nozzle 17 is installed at the head end of the mandrel 7, a sealing cup 12 is installed at the outer side of the head end of the mandrel 7, the sealing cup 12 and the nozzle 17 are both connected with the mandrel 7 through a snap spring 18, a reversing track is arranged on the outer wall of the upper portion of the mandrel 7, sealing rings for sealing are respectively arranged above and below the reversing track, a guide pin 3 penetrates through the outer wall of the knife body 2 and is movably connected with the reversing track, a spring step is arranged at the position of the mandrel 7 below the reversing track, the thrust bearing 4 is arranged below the spring step, the spring 5 is arranged between the thrust bearing, a mandrel limiting step 13 is arranged in the middle of a mandrel 7 above a cutter body limiting step 14, the mandrel limiting step 13 and the cutter body limiting step 14 are matched to limit the downward movement displacement of the mandrel 7, blade groups are arranged along the circumferential direction of the lower portion of a cutter body 2, the number of the blade groups is 3, each blade group is sequentially provided with 3 blades 6 from top to bottom along the outer surface of the cutter body, the distance between the adjacent blades 6 is equal, the tail ends of the blades 6 are integrally provided with a cutter handle, the cutter handle is matched with a cutter handle groove 20 to control the opening or closing of the blades 6, as shown in figures 5 and 6, the blades 6 are arranged on the lower portion of the cutter body 2 through a pin shaft 15, the pin shaft 15 is fixed through a stop pin 16, the included angle of the adjacent blade groups in the circumferential direction of the cutter body 2 is 40 degrees, cutter handle grooves 20 matched with the blade groups are uniformly formed in the outer wall of the mandrel 7, a guide block 8 is, the radial from top to bottom that follows dabber 7 of guide block 8 and handle of a knife groove 20 sets gradually, the quantity of handle of a knife groove 20 is 9, divide into three groups, the quantity of guide block 8 is 9, divide into three groups, and handle of a knife groove 20 and the setting of guide block 8 one-to-one, handle of a knife groove 20 and guide block 8 are used for contacting in order to realize the free switching of blade group when cutting in the pit with one of them knife group jointly, install spacing joint 10 at the tail end of dabber 7, spacing joint 10 cooperatees in order to reach the purpose of restriction displacement that resets with the spacing retaining ring 19 of installing on the lower part inner wall of cutter body 2, the head end of cutter body 2 passes through the screw and links to each other with top connection 1, the tail end of cutter body 2 passes through the trapezoidal screw thread on screw and the lower clutch 11 upper portion and links to each other.
When the cutting sieve tube is used, the cutting pipe column rotates to drive the cutter body 2 and the blades 6 to rotate, throttling pressure is generated when liquid passes through the nozzle 17, the pressure pushes the mandrel 7 to move downwards, the guide block 8 and the cutter handle groove 20 on the lower portion of the mandrel 7 push one blade group, a cutter handle in the blade group is pushed open by the cutter handle groove to expand to perform the operation of cutting the sieve tube, the other two blade groups are in a locking state, after the pipe column is cut, a pump is stopped and pressure is relieved, a piston is reset under the action of spring force, after the limiting joint 10 on the lower portion of the mandrel 7 is contacted with the limiting check ring 19, the piston is reset in place, when the piston moves downwards and resets, the guide pin 3 on the cutter body 2 moves along the reversing track, the mandrel 7 can rotate circumferentially under the reversing action of the reversing track, each time of pressing and each time of the pressure relief, the mandrel 7 can rotate by 40 degrees, the guide block 8, the knife handle in the blade group is opened under the jacking action of the knife handle groove, the free switching of opening or closing of the three blade groups is realized, the spindle 7 is in the rotating process, and the thrust bearing 4 effectively reduces the friction resistance between the spindle 7 and the spring 5.
Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used in the embodiments for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Moreover, relational terms such as "first" and "second," and the like, may be used solely to distinguish one element from another element having the same name, without necessarily requiring or implying any actual such relationship or order between such elements.
The present invention has been described in detail, but the above description is only a preferred embodiment of the present invention, and is not to be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (8)
1. Many swords of integral type water conservancy cutting knife, its characterized in that: the cutter comprises a cutter body, a mandrel, a thrust bearing, a spring, a blade group and a limiting joint, wherein the cutter body is of a hollow cylindrical structure, the mandrel is installed in the cutter body, the mandrel is of a hollow cylindrical structure, a reversing track is arranged on the outer wall of the upper part of the mandrel, a guide pin penetrates through the outer wall of the cutter body and is movably connected with the reversing track, a spring step is arranged at the mandrel position below the reversing track, the thrust bearing is arranged below the spring step, the spring is arranged between the thrust bearing and the cutter body limiting step arranged on the inner wall of the cutter body, a mandrel limiting step is arranged in the middle of the mandrel above the cutter body limiting step, the blade group is arranged along the circumferential direction of the lower part of the cutter body, and a cutter handle groove matched with the blade group is uniformly arranged on the outer wall of the mandrel, the lower part of dabber is fixed with the guide block through the fixed pin, the guide block with the handle groove is followed the radial of dabber sets gradually from top to bottom the tail end installation of dabber spacing joint, spacing joint with install spacing retaining ring on the lower part inner wall of cutter body cooperatees.
2. The integrated multi-blade hydraulic cutting knife of claim 1, wherein: the nozzle is installed at the head end of the mandrel, a sealing leather cup is installed on the outer side of the head end of the mandrel, and the sealing leather cup and the nozzle are connected with the mandrel through clamp springs.
3. The integrated multi-blade hydraulic cutting knife of claim 1, wherein: the number of the blade groups is 3, 3 blades are sequentially arranged on each blade group from top to bottom along the outer surface of the cutter body, the distances between adjacent blades are equal, the blades are arranged on the lower portion of the cutter body through pin shafts, and the pin shafts are fixed through the stop pins.
4. An integral multi-blade hydraulic cutting knife as claimed in claim 3, wherein: the included angle of the adjacent blade sets in the circumferential direction of the cutter body is 40 degrees.
5. An integral multi-blade hydraulic cutting knife as claimed in claim 3, wherein: the number of the cutter handle grooves is 9, the cutter handle grooves are divided into three groups, the number of the guide blocks is 9, the guide blocks are divided into three groups, and the cutter handle grooves and the guide blocks are arranged in a one-to-one correspondence mode.
6. The integrated multi-blade hydraulic cutting knife of claim 1, wherein: and sealing rings for sealing are respectively arranged at the upper part and the lower part of the reversing track.
7. The integrated multi-blade hydraulic cutting knife of claim 1, wherein: the head end of cutter body passes through the screw thread and links to each other with the top connection.
8. The integrated multi-blade hydraulic cutting knife of claim 1, wherein: the tail end of the cutter body is connected with the lower connector through threads, and the tail end of the cutter body is matched with the lower connector to fix the limiting check ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010357271.8A CN112127823A (en) | 2020-04-29 | 2020-04-29 | Integrated multi-cutter hydraulic cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010357271.8A CN112127823A (en) | 2020-04-29 | 2020-04-29 | Integrated multi-cutter hydraulic cutter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112127823A true CN112127823A (en) | 2020-12-25 |
Family
ID=73850404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010357271.8A Pending CN112127823A (en) | 2020-04-29 | 2020-04-29 | Integrated multi-cutter hydraulic cutter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112127823A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0341073A1 (en) * | 1988-05-06 | 1989-11-08 | Smith International, Inc. | Pipe milling tool blade and method of dressing same |
| US20130199785A1 (en) * | 2011-01-21 | 2013-08-08 | Smith International, Inc. | Multi-cycle pipe cutter and related methods |
| CN103573214A (en) * | 2013-11-06 | 2014-02-12 | 盐城彩阳电器阀门有限公司 | Circulation bottom valve which works with pressure |
| CN105452593A (en) * | 2013-05-16 | 2016-03-30 | Oilsco科技有限公司 | Apparatus and method for controlling a downhole device |
| US20160130904A1 (en) * | 2013-06-14 | 2016-05-12 | Welltec A/S | Downhole machining system and method |
| CN107218007A (en) * | 2017-08-02 | 2017-09-29 | 西南石油大学 | Rack pinion realizes the reducing hydraulic cutter of continuous cutting different-diameter sleeve pipe |
| CN107288566A (en) * | 2017-08-02 | 2017-10-24 | 西南石油大学 | Once complete the pressure release type hydraulic cutter of multilayer cutting |
| CN107387011A (en) * | 2017-08-02 | 2017-11-24 | 西南石油大学 | Waterpower promotes the downhole tool for realizing continuous cutting different-diameter sleeve pipe |
-
2020
- 2020-04-29 CN CN202010357271.8A patent/CN112127823A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0341073A1 (en) * | 1988-05-06 | 1989-11-08 | Smith International, Inc. | Pipe milling tool blade and method of dressing same |
| US20130199785A1 (en) * | 2011-01-21 | 2013-08-08 | Smith International, Inc. | Multi-cycle pipe cutter and related methods |
| CN105452593A (en) * | 2013-05-16 | 2016-03-30 | Oilsco科技有限公司 | Apparatus and method for controlling a downhole device |
| US20160130904A1 (en) * | 2013-06-14 | 2016-05-12 | Welltec A/S | Downhole machining system and method |
| CN103573214A (en) * | 2013-11-06 | 2014-02-12 | 盐城彩阳电器阀门有限公司 | Circulation bottom valve which works with pressure |
| CN107218007A (en) * | 2017-08-02 | 2017-09-29 | 西南石油大学 | Rack pinion realizes the reducing hydraulic cutter of continuous cutting different-diameter sleeve pipe |
| CN107288566A (en) * | 2017-08-02 | 2017-10-24 | 西南石油大学 | Once complete the pressure release type hydraulic cutter of multilayer cutting |
| CN107387011A (en) * | 2017-08-02 | 2017-11-24 | 西南石油大学 | Waterpower promotes the downhole tool for realizing continuous cutting different-diameter sleeve pipe |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201225 |