CN115680538A - Jetting device for cutting in underground drilling tool - Google Patents
Jetting device for cutting in underground drilling tool Download PDFInfo
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- CN115680538A CN115680538A CN202211443650.4A CN202211443650A CN115680538A CN 115680538 A CN115680538 A CN 115680538A CN 202211443650 A CN202211443650 A CN 202211443650A CN 115680538 A CN115680538 A CN 115680538A
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- 238000005520 cutting process Methods 0.000 title claims abstract description 78
- 238000005553 drilling Methods 0.000 title claims abstract description 17
- 238000002347 injection Methods 0.000 claims abstract description 42
- 239000007924 injection Substances 0.000 claims abstract description 42
- 238000005507 spraying Methods 0.000 claims abstract description 17
- 230000000694 effects Effects 0.000 claims abstract description 12
- 238000009413 insulation Methods 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims description 9
- 239000007921 spray Substances 0.000 abstract description 8
- 239000012530 fluid Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 239000003832 thermite Substances 0.000 description 9
- 238000004880 explosion Methods 0.000 description 4
- 239000002360 explosive Substances 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
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- 230000009467 reduction Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910001080 W alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 239000003129 oil well Substances 0.000 description 1
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Abstract
The invention relates to the technical field of underground pipe column cutting, in particular to a spraying device for underground drilling tool internal cutting, which comprises a shell, wherein a heat insulation lining is arranged on the inner wall of the shell, a nozzle fixedly connected with the shell is arranged below the heat insulation lining, a plurality of spraying channels are vertically arranged on the nozzle, the spraying channels are arranged along the circumferential direction of the nozzle, are in an arc shape and consist of arcs of two concentric circles and arcs at two ends; a flow guide cone is arranged at the upper end axis of the nozzle; the lower extreme of nozzle is connected with the shunt, the lateral wall of shunt is provided with and is used for transversely carrying out the arcwall face that sprays with the flame direction of vertical injection, still be provided with a plurality of spouts that meet with the arcwall face on the shunt. Through this device, can effectively solve the long and not good problem of cutting effect of cutting time.
Description
Technical Field
The invention relates to the technical field of underground pipe column cutting, in particular to a spraying device for underground drilling tool internal cutting.
Background
The existing downhole string cutting tools are various, and the working rule and the application condition of the downhole string cutting tools become the hot points of research in recent years. The cutting mode is mainly divided into: chemical cutting, coiled tubing energy-focused cutting, arc cutting, and hydraulic cutting. The chemical cutting method has the advantages of smooth cut, high cutting speed, no residual cutting chips and the like, and is favorable for further operation. However, the environment pollution is large, the chemical reagent amount is not easy to control, the corrosive solution can cause the corrosion of the casing in the splashing process, the well repairing operation has hidden troubles, and for horizontal wells and oil wells with large inclination, the cable is difficult to convey equipment underground. The distance between the equipment and the inner wall of the cutting pipe column is strictly limited, and chemical reagents have certain dangerousness. The coiled tubing gathers can the cutting, adopts the explosive explosion to spray away metal particle and cuts the tubular column, and after the cutting was accomplished, coiled tubing can be fast with by the pipe column establishment passageway of cutting carry out the well liquid circulation, less to environmental pollution, can greatly shorten operation cycle. However, due to the fact that explosive explosion power is too large, the cut shape of the cut of the pipe column is irregular after the pipe column is cut off, a horn-shaped cut can be formed, and if the explosive amount is large, the outer sleeve of the oil pipe can be damaged. Because of the large vibration generated during explosion, the pipe column and the equipment are damaged to a certain extent, and when the dosage is small, the pipe column is poor in cutting effect, even has no phenomenon of cutting. Arc cutting, which utilizes the interaction between two electrodes to generate arc discharge to process materials. It requires a high technical requirement, which is also a place where its use is limited. Hydraulic cutting adopts the cutting knife of mechanical type to cut the pipeline, and it needs to adopt comparatively complicated mechanical structure, probability greatly increased that goes wrong to operational environment and inner chamber space have restricted its application scene.
Based on the above-mentioned deficiencies of various cutting techniques, a novel cutting technique appears: the pyrotechnic composition cutting adopts the high temperature generated by thermite to directly act on the inner wall of the pipe column, thereby realizing the purpose of cutting.
In the prior art, a chinese invention patent document with publication number CN101619649A and publication date 2010, 01/06 is proposed, and the technical scheme disclosed by the patent document is as follows: a non-explosive annular cutting device for metal tubes is composed of a hot-water agent burning unit for generating high temp, and a cutting unit for cutting the metal tube. Mainly comprises an upper joint, a charging chamber, a fluid distribution fluid director, a steering gear, a sealing sliding sleeve, a tailstock and other structures. After the thermite in the charging chamber is ignited, the generated high-temperature fluid flows to the fluid distribution fluid director along the axial direction of the device, the high-temperature fluid is turned by the steering gear after passing through the fluid distribution fluid director, the moving direction of the high-temperature fluid is smoothly changed into the radial direction vertical to the axial direction of the device, and meanwhile, under the action of pressure, the sealing sliding sleeve slides to the tail part of the device to open a cutting channel. The high-temperature fluid directly acts on the inner surface of the cut metal pipe, so that the cutting operation is realized.
In the actual use process, the following problems can occur in the technical scheme:
this scheme adopts the reposition of redundant personnel passageway of round hole form, to the control that the heat can not be fine, and the heat is easy intermittent emission in the cutting process, leads to the time length that needs the cutting and cutting effect is not good.
Disclosure of Invention
In order to solve the technical problems, the invention provides a spraying device for underground drilling tool internal cutting, which can effectively solve the problems of long cutting time and poor cutting effect.
The invention is realized by adopting the following technical scheme:
the utility model provides a cutting uses injection apparatus in downhole drilling tool, includes the casing, the inner wall of casing is provided with thermal-insulated inside lining, its characterized in that: a nozzle fixedly connected with the shell is arranged below the heat insulation lining, a plurality of spraying channels are vertically arranged on the nozzle, the spraying channels are arranged along the circumferential direction of the nozzle, and the spraying channels are arc-shaped and consist of arcs of two concentric circles and arcs at two ends; a flow guide cone is arranged at the upper end axis of the nozzle; the lower extreme of nozzle is connected with the shunt, the lateral wall of shunt is provided with and is used for transversely carrying out the arcwall face that sprays with the flame direction of vertical injection, still be provided with a plurality of spouts that meet with the arcwall face on the shunt.
A heat-resistant supporting seat is arranged between the heat-insulating lining and the nozzle, and the opening size of the upper end of the heat-resistant supporting seat is larger than that of the lower end of the heat-resistant supporting seat.
The number of the injection channels is four.
The angle corresponding to the arc length of the arcs of the two concentric circles in the injection channel is 55 degrees, and the distance between the arcs of the two concentric circles is 5mm.
The nozzle is detachably connected with the flow divider.
The axle center department of nozzle is provided with the mounting, the shunt passes through the mounting and realizes dismantling with the nozzle and be connected.
The lower extreme of shunt is connected with support piece, the last movable sleeve of support piece is equipped with the sleeve, telescopic upper end activity cover is established on the casing, the cover is equipped with the sealing washer with sleeve contact on support piece and the casing, the sleeve respectively with spout, shunt, support piece between all be provided with exhaust passage.
The support piece is of a T-shaped structure, a cavity is arranged between the sleeve and the lower surface of the head of the T-shaped structure, and the cavity is communicated with the exhaust channel.
The lower end of the supporting piece is connected with a blocking piece.
Compared with the prior art, the invention has the beneficial effects that:
1. in the invention, heat is led by the flow leading cone to enter the jet channel in a high-speed state, so that the heat is prevented from directly impacting the end face of the nozzle to weaken the movement speed of the heat. Through the injection passage on the nozzle, the speed increase of heat motion, the arc face is with the heat direction horizontal direction of high-speed motion to the heat is to spraying all around along the circumference of shunt, thereby acts on the tubular column inner wall, has guaranteed the effect of cutting, makes the incision keep leveling simultaneously.
Furthermore, the circular arc of the injection channel consists of circular arcs of two concentric circles and small circular arcs at two ends, and compared with a circular-hole-shaped structure, the injection channel adopting the circular-arc structure is more favorable for speed concentration and is not easy to discontinuously disperse in the cutting process. Although the jet passage of circular arc structure will lead to cutting speed to reduce, it is because pipeline width area grow will lead to speed to increase slowly, in this application, through the arcwall face that sets up on the lateral wall of shunt and the spout that meets with the arcwall face, the spout can carry out last acceleration to the heat after the diversion is accomplished to supplementary heat diversion in-process loss's speed, thereby guarantee the cutting of heat to the tubular column inner wall.
The event utilizes the mutual cooperation of arcwall face, spout on the injection passage on nozzle, the nozzle and the shunt, can realize the stability of injection apparatus during operation, can make again high temperature firework to the continuous cutting of tubular column inner wall with the mode of cutting in succession, and has sufficient speed to reach the tubular column inner wall, guarantees the effect of cutting.
2. The opening size of the upper end of the heat-resistant supporting seat is larger than that of the lower end of the heat-resistant supporting seat, so that the heat-resistant supporting seat forms a conical channel, namely, the heat movement speed is increased preliminarily, and the defect of cutting speed reduction caused by the adoption of the spraying channel with the arc structure is further overcome.
3. The angle that the arc length of the circular arc of two concentric circles corresponds in the injection passage is 55, and the distance between the circular arcs of two concentric circles is 5mm, can guarantee the stability of injection apparatus during operation, can make the continuous cutting of high temperature firework to the tubular column inner wall with the mode of cutting in succession again, and has sufficient speed to reach the tubular column inner wall.
4. The nozzle is detachably connected with the flow divider, corresponding accessories are conveniently replaced in subsequent maintenance, and maintenance cost is reduced conveniently.
5. Set up the sleeve and can seal the casing, avoid the moisture in the tubular column to enter into the burning that influences the thermite in the casing, through setting up exhaust passage, when the thermite just begins the burning, exhaust passage can be gushed into to high-pressure gas to the direction motion that breaks away from the casing, finally spill the spout, realize the cutting to the tubular column inner wall. The sealing rings arranged at the upper end and the lower end of the sleeve seal the gap, so that the sleeve is prevented from being opened by driving due to leakage of high-pressure gas.
6. Be provided with the cavity between the head lower surface of sleeve and T type structure, can make high-pressure gas better drive sleeve motion, guarantee that the sleeve in time breaks away from the casing, avoid influencing the cutting operation to avoid gaseous not having timely discharge to lead to sleeve department to explode.
7. The blocking piece is arranged, so that the falling sleeve can be blocked, and the sleeve is prevented from falling to the lower end of the spraying device to influence the work of other structures of the cutting device.
Drawings
The invention will be described in further detail with reference to the following description taken in conjunction with the accompanying drawings and detailed description, in which:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic plan view of the injection channel of the present invention;
the mark in the figure is:
1. the heat insulation device comprises a heat insulation lining, 2, a shell, 3, a heat-resistant support seat, 4, a drainage cone, 5, a nozzle, 6, a spraying channel, 7, a sealing ring, 8, a nozzle, 9, a fixing piece, 10, a flow divider, 11, an exhaust channel, 12, a sleeve, 13, a supporting piece, 14, a cavity, 15 and a stopper.
Detailed Description
Example 1
The invention comprises, as a basic embodiment thereof, a jet device for downhole cutting, comprising a casing 2, the inner wall of said casing 2 being provided with a thermally insulating lining 1. And a nozzle 5 fixedly connected with the shell 2 is arranged below the heat insulation lining 1. A plurality of injection channels 6 are vertically arranged on the nozzle 5, the injection channels 6 are arranged along the circumferential direction of the nozzle 5, and the injection channels 6 are arc-shaped and are composed of arcs of two concentric circles and small arcs at two ends. In the present embodiment, the number of the injection passages 6 is not limited.
And a flow guide cone 4 is arranged at the upper end axis of the nozzle 5. The lower end of the nozzle 5 is connected with a flow divider 10, the side wall of the flow divider 10 is provided with an arc-shaped surface for guiding the vertically sprayed flame to be transversely sprayed, and the flow divider 10 is further provided with a plurality of nozzles 8 connected with the arc-shaped surface.
The arcwall face, spout 8 on the spray channel 6 and the shunt 10 on nozzle 5, the nozzle 5 are utilized to this embodiment mutually support, and spout 8 can carry out final acceleration to the heat after the diversion is accomplished to the speed of supplementary heat diversion in-process loss, thereby on guaranteeing the inner wall of the fast-speed guide pipe post of heat that will produce in the twinkling of an eye, make its heat concentrate the inner wall of being used in the tubular column fast, guaranteed the effect of cutting.
Example 2
The invention provides a spraying device for cutting in a downhole drilling tool, which comprises a shell 2, wherein the inner wall of the shell 2 is provided with a heat insulation lining 1. The below of thermal-insulated inside lining 1 is provided with the nozzle 5 with casing 2 fixed connection, a plurality of injection passage 6 have vertically been seted up on nozzle 5, injection passage 6 sets up along the circumference of nozzle 5, just injection passage 6 is circular-arcly, comprises the circular arc at two concentric circles and the small circle arc at both ends.
And a flow guide cone 4 is arranged at the upper end axis of the nozzle 5. The lower extreme of nozzle 5 is connected with shunt 10, the lateral wall of shunt 10 is provided with the arcwall face that is used for transversely carrying out the spraying with the flame direction of vertical spraying, still be provided with a plurality of spouts 8 that meet with the arcwall face on the shunt 10.
The lower extreme of shunt 10 is connected with support piece 13, the movable sleeve is equipped with sleeve 12 on support piece 13, the upper end activity cover of sleeve 12 is established on casing 2, the cover is equipped with sealing washer 7 with sleeve 12 contact on support piece 13 and the casing 2, sleeve 12 all is provided with exhaust passage 11 respectively with between spout 8, shunt 10, the support piece 13.
The support piece 13 is of a T-shaped structure, a cavity 14 is arranged between the sleeve 12 and the lower surface of the head of the T-shaped structure, and the cavity 14 is communicated with the exhaust channel 11.
Example 3
Referring to the attached drawings 1 and 2 as the best mode of the invention, the invention comprises a jet device for cutting in a downhole drilling tool, which comprises a shell 2, wherein the inner wall of the shell 2 is provided with a heat insulation lining 1. The heat insulating lining 1 is made of a thermite material for heat release. And a nozzle 5 fixedly connected with the shell 2 is arranged below the heat insulation lining 1, and four injection channels 6 are vertically arranged on the nozzle 5. Referring to the attached fig. 2 of the specification, the injection channel 6 is arranged along the circumferential direction of the nozzle 5, and the injection channel 6 is arc-shaped and consists of two arcs of concentric circles and small arcs at two ends. More specifically, the angle r that the arc length of the circular arc of two concentric circles corresponds in the injection passage 6 is 55, and the distance d between the circular arcs of two concentric circles is 5mm, can guarantee the stability of injection apparatus during operation, can make the continuous cutting of high temperature firework to the tubular column inner wall in the mode of continuous cutting again, and has sufficient speed to reach the tubular column inner wall.
Compared with a circular hole-shaped structure, the spray channel 6 adopting the circular arc structure is more favorable for speed concentration and is not easy to discontinuously disperse in the cutting process. But in this way a reduction in cutting speed will result because a larger tube width area will result in a slower speed increase. In order to ensure continuous cutting action, the spray channel 6 should be selected to have a circular arc structure, and in order to ensure the moving speed of heat, the internal pressure of the tool can be increased appropriately to increase the spray speed during operation.
A heat-resistant support seat 3 is arranged between the heat-insulating lining 1 and the nozzle 5, the opening size of the upper end of the heat-resistant support seat 3 is larger than that of the lower end, wherein the upper end specifically refers to the end close to the heat-insulating lining 1. The heat-resistant support base 3 and the heat-insulating lining 1 are made of high-purity graphite. The heat-resistant support 3 has a tapered passage, i.e. for initially increasing the speed of heat movement.
The axial center of the upper end of the nozzle 5 is provided with a flow guide cone 4, and the lower end of the nozzle 5 is connected with a flow divider 10. More specifically, a fixing piece 9 is arranged at the axis of the nozzle 5, and the flow divider 10 is detachably connected with the nozzle 5 through the fixing piece 9. The flow divider 10 is detachably connected with the nozzle 5, so that corresponding accessories can be conveniently replaced in subsequent maintenance, and the maintenance cost is reduced.
The side wall of the flow divider 10 is provided with an arc-shaped surface for guiding the vertically sprayed flame to spray transversely, and the flow divider 10 is also provided with a plurality of nozzles 8 connected with the arc-shaped surface. The cone 4, nozzle 5, spout 8 and diverter 10 are all made of tungsten alloy. The spout 8 is arranged to accelerate the heat after the diversion is completed finally so as to supplement the loss speed of the heat in the diversion process, thereby ensuring the cutting of the heat on the inner wall of the pipe column.
The lower extreme of shunt 10 is connected with support piece 13, the movable sleeve is equipped with sleeve 12 on support piece 13, the upper end activity cover of sleeve 12 is established on casing 2, the cover is equipped with sealing washer 7 with sleeve 12 contact on support piece 13 and the casing 2, be provided with exhaust passage 11 between sleeve 12 and spout 8, shunt 10, the support piece 13. Set up sleeve 12 and can close casing 2, avoid the moisture in the tubular column to enter into the burning that influences the thermite in the casing 2, through setting up exhaust passage 11, when the thermite just begins the burning, high-pressure gas can gush into exhaust passage 11 to drive sleeve 12 is to the direction motion that breaks away from casing 2, finally spills spout 8, realizes the cutting to the tubular column inner wall. The sealing rings 7 arranged at the upper end and the lower end of the sleeve 12 seal the gap, so that the sleeve 12 is prevented from being driven to open due to high-pressure gas leakage.
The support piece 13 is of a T-shaped structure, a cavity 14 is arranged between the sleeve 12 and the lower surface of the head of the T-shaped structure, and the cavity 14 is communicated with the exhaust channel 11. The cavity 14 is provided to enable the high-pressure gas to better drive the sleeve 12 to move, so as to ensure that the sleeve 12 is timely separated from the shell 2, avoid influencing the cutting operation, and avoid explosion at the sleeve 12 caused by the fact that the gas is not timely discharged.
A stopper 15 is connected to the lower end of the support 13. The stopper 15 is arranged to stop the fallen sleeve 12, so as to prevent the sleeve 12 from falling to the lower end of the spraying device to influence the operation of other structures of the cutting device.
After the injection device moves to a proper position, the thermite is ignited, the thermite generates high temperature instantly, gas in the shell 2 is forced to pass through the exhaust passage 11 at high speed and enter the cavity 14, the sleeve 12 is quickly separated from the shell 2, subsequent high-temperature smoke and fire enter the injection passage 6 at high speed under the guiding action of the diversion cone 4, and the high-temperature smoke and fire are transversely sprayed out from the nozzle 8 through the turning of the arc-shaped surface, so that the inner wall of the pipe column is cut by the high-temperature high-speed smoke and fire.
In summary, after reading the present disclosure, those skilled in the art should make various other modifications without creative efforts according to the technical solutions and concepts of the present disclosure, which are within the protection scope of the present disclosure.
Claims (9)
1. The utility model provides a cutting uses injection apparatus in downhole drilling tool, includes casing (2), the inner wall of casing (2) is provided with thermal-insulated inside lining (1), its characterized in that: a nozzle (5) fixedly connected with the shell (2) is arranged below the heat insulation lining (1), a plurality of injection channels (6) are vertically arranged on the nozzle (5), the injection channels (6) are arranged along the circumferential direction of the nozzle (5), and the injection channels (6) are arc-shaped and consist of two arcs of concentric circles and arcs at two ends; a flow guide cone (4) is arranged at the upper end axis of the nozzle (5); the lower extreme of nozzle (5) is connected with shunt (10), the lateral wall of shunt (10) is provided with the arcwall face that is used for transversely carrying out the injection with vertical flame direction of spraying, still be provided with spout (8) that a plurality of and arcwall face meet on shunt (10).
2. The downhole drilling tool inner cutting injection apparatus according to claim 1, wherein: a heat-resistant supporting seat (3) is arranged between the heat-insulating lining (1) and the nozzle (5), and the opening size of the upper end of the heat-resistant supporting seat (3) is larger than that of the lower end.
3. The downhole drilling tool inner cutting injection apparatus according to claim 2, wherein: the number of the injection channels (6) is four.
4. The downhole drilling tool inner cutting injection apparatus according to claim 3, wherein: the angle corresponding to the arc length of the arcs of the two concentric circles in the injection channel (6) is 55 degrees, and the distance between the arcs of the two concentric circles is 5mm.
5. The downhole drilling tool inner cutting injection apparatus according to claim 2 or 4, wherein: the nozzle (5) is detachably connected with the flow divider (10).
6. The downhole drilling tool inner cutting injection apparatus according to claim 5, wherein: the axial center of the nozzle (5) is provided with a fixing piece (9), and the flow divider (10) is detachably connected with the nozzle (5) through the fixing piece (9).
7. The downhole drilling tool inner cutting injection apparatus according to claim 2, wherein: the lower extreme of shunt (10) is connected with support piece (13), the activity cover is equipped with sleeve (12) on support piece (13), the upper end activity cover of sleeve (12) is established on casing (2), the cover is equipped with sealing washer (7) with sleeve (12) contact on support piece (13) and casing (2), sleeve (12) respectively with spout (8), shunt (10), support piece (13) between all be provided with exhaust passage (11).
8. The downhole drilling tool inner cutting injection apparatus according to claim 7, wherein: the support piece (13) is of a T-shaped structure, a cavity (14) is arranged between the sleeve (12) and the lower surface of the head of the T-shaped structure, and the cavity (14) is communicated with the exhaust channel (11).
9. The downhole drilling tool inner cutting injection apparatus according to claim 8, wherein: the lower end of the supporting piece (13) is connected with a stopper (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211443650.4A CN115680538A (en) | 2022-11-18 | 2022-11-18 | Jetting device for cutting in underground drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211443650.4A CN115680538A (en) | 2022-11-18 | 2022-11-18 | Jetting device for cutting in underground drilling tool |
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| Publication Number | Publication Date |
|---|---|
| CN115680538A true CN115680538A (en) | 2023-02-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211443650.4A Pending CN115680538A (en) | 2022-11-18 | 2022-11-18 | Jetting device for cutting in underground drilling tool |
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| Country | Link |
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| CN (1) | CN115680538A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101619649A (en) * | 2009-07-27 | 2010-01-06 | 西安近代化学研究所 | Non-explosive ring-shaped device for cutting metal pipes |
| US20140034315A1 (en) * | 2012-07-31 | 2014-02-06 | Otto Torpedo Inc. | Radial Conduit Cutting System and Method |
| CN106761562A (en) * | 2016-12-27 | 2017-05-31 | 中国石油天然气股份有限公司 | A kind of drifting scraper |
| US20190128083A1 (en) * | 2017-10-31 | 2019-05-02 | Otto Torpedo Company | Radial Conduit Cutting System |
| US20190186243A1 (en) * | 2017-12-14 | 2019-06-20 | Schlumberger Technology Corporation | Thermal cutter |
| CN111734335A (en) * | 2020-07-02 | 2020-10-02 | 合力（天津）能源科技股份有限公司 | Torch energy cutter |
| RU206187U1 (en) * | 2020-12-25 | 2021-08-30 | Общество с ограниченной ответственностью "ТРИУМФ АЛЬЯНС" | PIPE CROSS-CUTTING DEVICE |
-
2022
- 2022-11-18 CN CN202211443650.4A patent/CN115680538A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101619649A (en) * | 2009-07-27 | 2010-01-06 | 西安近代化学研究所 | Non-explosive ring-shaped device for cutting metal pipes |
| US20140034315A1 (en) * | 2012-07-31 | 2014-02-06 | Otto Torpedo Inc. | Radial Conduit Cutting System and Method |
| CN106761562A (en) * | 2016-12-27 | 2017-05-31 | 中国石油天然气股份有限公司 | A kind of drifting scraper |
| US20190128083A1 (en) * | 2017-10-31 | 2019-05-02 | Otto Torpedo Company | Radial Conduit Cutting System |
| US20190186243A1 (en) * | 2017-12-14 | 2019-06-20 | Schlumberger Technology Corporation | Thermal cutter |
| CN111734335A (en) * | 2020-07-02 | 2020-10-02 | 合力（天津）能源科技股份有限公司 | Torch energy cutter |
| RU206187U1 (en) * | 2020-12-25 | 2021-08-30 | Общество с ограниченной ответственностью "ТРИУМФ АЛЬЯНС" | PIPE CROSS-CUTTING DEVICE |
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| WO1984001421A1 (en) | Burner |
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