CN112983323B - Electric cutting tool in oil pipe - Google Patents
Electric cutting tool in oil pipe Download PDFInfo
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- CN112983323B CN112983323B CN202110306481.9A CN202110306481A CN112983323B CN 112983323 B CN112983323 B CN 112983323B CN 202110306481 A CN202110306481 A CN 202110306481A CN 112983323 B CN112983323 B CN 112983323B
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- 238000005520 cutting process Methods 0.000 title claims abstract description 100
- 241000935974 Paralichthys dentatus Species 0.000 claims abstract description 40
- 230000007246 mechanism Effects 0.000 claims abstract description 25
- 230000008878 coupling Effects 0.000 claims description 29
- 238000010168 coupling process Methods 0.000 claims description 29
- 238000005859 coupling reaction Methods 0.000 claims description 29
- 241000242541 Trematoda Species 0.000 claims description 11
- 210000000078 claw Anatomy 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 4
- 238000003491 array Methods 0.000 claims 1
- 230000000149 penetrating effect Effects 0.000 claims 1
- 230000009471 action Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 230000000452 restraining effect Effects 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 241000215510 Microstoma <fungus> Species 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
- E21B29/002—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe
- E21B29/005—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe with a radially-expansible cutter rotating inside the pipe, e.g. for cutting an annular window
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Turning (AREA)
Abstract
The invention discloses an electric cutting tool in an oil pipe, which comprises a mechanical anchor fluke mechanism and a cutting mechanism, wherein the mechanical anchor fluke mechanism is fixedly connected with the cutting mechanism; the mechanical fluke mechanism comprises a first cylindrical component, a first driving part and a fluke component are arranged in the first cylindrical component, the fluke component penetrates through the first cylindrical component, and the first driving part is used for expanding and contracting the fluke component; the cutting mechanism comprises a second cylinder assembly, a second driving portion, a third driving portion and a cutting assembly are arranged inside the second cylinder assembly, the cutting assembly penetrates through the second cylinder assembly, the third driving portion is used for expanding and contracting the cutting assembly, and the second driving portion is used for rotating the cutting assembly to achieve a cutting function. The internal cutting device can perform internal cutting on a small-diameter oil pipe, has high cutting efficiency and low requirement on operation site conditions, and is convenient to operate; when the tool is used for cutting the oil pipe, the fracture is smooth, and secondary damage to the oil pipe and a shaft can not be caused.
Description
Technical Field
The invention relates to the technical field of oil exploitation, in particular to an electric cutting tool in an oil pipe.
Background
In recent years, as the degree of exploration and development of oil fields is higher, the construction of oil wells is further complicated, and the technology in drilling and production and oil field operation well repair is also continuously improved. However, after the rapid development of high and new technologies, there are a series of problems which have to be taken into consideration. As most of domestic oil field exploitation enters the middle and later stages, phenomena such as deformation, blockage and the like of underground oil pipes of various large oil fields also increase year by year. In order to meet the requirements of well repair operation and minimize loss, a plurality of new processes and new tools appear in recent years, wherein cutting in the oil pipe is one of effective ways for solving the blockage of the oil pipe. At present, the existing internal cutting technology at home and abroad mainly comprises: mechanical internal cutting knife cutting, magnesium powder cutting, high-pressure water jet cutting, explosion cutting, chemical cutting and the like.
The mechanical internal cutter cuts are made by lowering a fixed cutter to a predetermined depth, then opening the blades and rotating the string from the surface to cut the casing. However, the inner diameter of the oil pipe is small, the well depth of the oil well is 1000 meters, and the mechanical internal casing cutter cannot be used.
The magnesium powder cutting is to trigger the resistance of the electric heating head in the heat energy generator through current, the generated heat ignites the high-energy fuel agent, high pressure and strong heat are generated to intensify the thermal movement of particles in the high-energy fuel agent, all atoms are ionized, and the cutting operation is carried out by utilizing the fusing property. However, in the cutting process, the inner wall of the oil pipe at the cutting point is easy to damage, and the cutting is incomplete.
The high-pressure water jet cutting is to mix abrasive particles with certain particle size into high-pressure water jet, and to erode the surface of the material by utilizing the hardness and kinetic energy of the high-speed abrasive particles, so as to realize the cutting of the oil pipe. However, the entire cutting process of abrasive water jet cutting is performed at high pressure and is not suitable for use in flooded or confined downhole tubing.
The explosive cutting is to utilize energy-gathering effect, to coat a metal cover on the conical cavity, and the metal cover forms high-speed metal jet to cut the oil pipe under the explosive charging detonation action. However, the cut fracture is extremely irregular, and the cut oil pipe has a larger diameter than the original diameter, which has influence on the next operation.
The chemical cutting is to cut off the pipe column by using chemical agents in the cutting tool to react and generate high-temperature and high-pressure chemical corrosive. However, the sprayed fluid is a fluoride, which has strong toxicity, thus limiting its use. Therefore, a need exists for a power cutting tool for use in an oil pipe to solve the problems of the prior art.
Disclosure of Invention
The invention aims to provide an electric cutting tool in an oil pipe, which is used for solving the problems in the prior art, can perform internal cutting on a small-diameter oil pipe, and has the advantages of high cutting efficiency, convenient operation and low requirement on the conditions of a working site; when the tool is used for cutting the oil pipe, the fracture is smooth, and secondary damage to the oil pipe and a shaft can not be caused.
In order to achieve the purpose, the invention provides the following scheme: the invention provides an electric cutting tool in an oil pipe, which comprises a mechanical anchor fluke mechanism and a cutting mechanism, wherein the mechanical anchor fluke mechanism is fixedly connected with the cutting mechanism;
the mechanical fluke mechanism comprises a first cylindrical component, a first driving part and a fluke component are arranged in the first cylindrical component, the fluke component penetrates through the first cylindrical component, and the first driving part is used for expanding and contracting the fluke component;
the cutting mechanism comprises a second cylinder assembly, a second driving portion, a third driving portion and a cutting assembly are arranged inside the second cylinder assembly, the cutting assembly penetrates through the second cylinder assembly, the third driving portion is used for expanding and contracting the cutting assembly, and the second driving portion is used for rotating the cutting assembly to achieve a cutting function.
Preferably, the first cylinder assembly comprises a first cylinder and a second cylinder, the first cylinder is fixedly connected with the end of the second cylinder, a circuit board box is arranged at the top end of the first cylinder, the first driving portion is arranged in the first cylinder, the fluke assembly is arranged in the second cylinder, and the fluke assembly penetrates through the side wall of the second cylinder and is in sliding connection with the side wall of the second cylinder.
Preferably, first drive division includes first step motor, first lead screw both ends respectively the coupling have the bearing plectane, first lead screw is close to the tip of first step motor link up the bearing plectane, and with first step motor output rigid coupling, first step motor rigid coupling is in first drum inner wall, the first lead screw outside be provided with first nut with the fluke subassembly, first lead screw with first nut threaded connection, first nut is kept away from the side of first step motor with the fluke subassembly rigid coupling.
Preferably, the fluke subassembly includes cone on the center, cone conical surface contact is connected with a plurality of fluke, a plurality of on the center the fluke annular array sets up, cone both ends outside has cup jointed first backup pad on the center, and with first backup pad sliding connection, the side that first step motor was kept away from to first nut with cone tip rigid coupling on the center, first drum inner wall rigid coupling has first spacing sensor, first spacing sensor is in the first nut outside, second drum lateral wall has link up a plurality of first slide, the fluke inlays the dress in the first slide, and with first slide sliding connection, first slide both ends are inlayed and are equipped with first clamp plate, first clamp plate with be provided with first spring between the fluke.
Preferably, the second cylinder assembly comprises a third cylinder, a fourth cylinder and a fifth cylinder, ends of the fourth cylinder and the fifth cylinder are fixedly connected, the second driving portion is arranged in the third cylinder, the cutting assembly and the third driving portion are arranged in the fourth cylinder and the fifth cylinder, and the cutting assembly penetrates through a side wall of the fourth cylinder and is in sliding connection with a side wall of the fourth cylinder.
Preferably, the second driving part comprises an electric motor, a conductive slip ring and a T-shaped coupler, the electric motor is fixedly connected to the inner wall of the third cylinder, the output end of the electric motor is fixedly connected to one end of the conductive slip ring, the other end of the conductive slip ring is fixedly connected to the large opening end of the T-shaped coupler, one end of the large opening end of the T-shaped coupler, which is far away from the conductive slip ring, is fixedly connected to the end of the fourth cylinder, and the small opening end of the T-shaped coupler is coupled to the third driving part.
Preferably, the third driving part comprises a second stepping motor and a second lead screw, the second stepping motor is fixedly connected with the inner wall of the fifth cylinder, one end of the second lead screw is fixedly connected with the output end of the second stepping motor, the other end of the second lead screw is connected with the small-opening end of the T-shaped coupler in a shaft mode, a second nut is arranged on the outer side of the second lead screw, the cutting assembly is fixedly connected with the end portion of the second stepping motor, and the second nut is far away from the end portion of the second stepping motor and the cutting assembly.
Preferably, the cutting assembly includes cone under the center, cone conical surface contact is connected with a plurality of slip sword piece, a plurality of under the center slip sword piece annular array sets up, the perpendicular rigid coupling in slip sword piece outside has the cutter, the cone outside has cup jointed the second backup pad under the center, and with second backup pad sliding connection, the second nut is kept away from the side of second step motor with cone tip rigid coupling on the center, fifth drum inner wall rigid coupling has the spacing sensor of second, the spacing sensor of second is in the second nut outside, fourth drum lateral wall has run through a plurality of second slide, the slip sword piece inlay dress in the second slide, and with second slide sliding connection, second slide both ends are inlayed and are equipped with the second clamp plate, the second clamp plate with be provided with the second spring between the slip sword piece.
Preferably, the outer side of the central lower cone is fixedly connected with a plurality of positioning bearings, the plurality of positioning bearings are arranged in an annular array, the inner wall of the fourth cylinder is axially provided with a plurality of sliding grooves, the positioning bearings are in sliding connection with the sliding grooves, the outer side of the central lower cone is in contact connection with a plurality of cutter body righting columns, and the cutter body righting columns penetrate through the side wall of the fourth cylinder and are in sliding connection with the side wall of the fourth cylinder.
Preferably, the second cylinder is fixedly connected with the end of the third cylinder, the first lead screw extends into the third cylinder, the bearing circular plate close to the first stepping motor is fixedly connected to the inner wall of the first cylinder, and the bearing circular plate far away from the first stepping motor is fixedly connected to the inner wall of the third cylinder.
The invention discloses the following technical effects:
the cutter can be directly lowered to the designated position of the oil pipe for cutting; the tool can be repeatedly used for multiple wells, is simple to operate, safe and reliable, has low requirements on the conditions of an operation field, and does not generate adverse effects when being cut; when the tool is used for cutting the oil pipe, the fracture is smooth, the oil pipe cannot be damaged, and a reliable guarantee is provided for recycling of the oil pipe.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a disassembled isometric view of an electric inside tubing cutting tool of the present invention;
FIG. 2 is an isometric view of the mechanical fluke mechanism of FIG. 1;
FIG. 3 is an isometric view of the cutting mechanism of FIG. 1;
FIG. 4 is an isometric view of the fourth cylinder, second lead screw, second nut, and central lower cone assembly;
FIG. 5 is a bottom view of FIG. 4 with the second lead screw removed;
FIG. 6 is an isometric view of the central lower cone, the second lead screw, and the positioning bearing;
FIG. 7 is an isometric view of a second lead screw and a second nut;
FIG. 8 is an isometric view of the sliding knife block and second platen;
FIG. 9 is a perspective view of the sliding cutter block, the second presser plate, and the cutter shaft;
FIG. 10 is a schematic view showing a state where the cutter is retracted;
fig. 11 is a schematic view showing the state in which the cutter is expanded.
The device comprises a first cylinder 1, a second cylinder 2, a third cylinder 3, a fourth cylinder 4, a fifth cylinder 5, a first stepping motor 6, a first lead screw 7, an upper central cone 8, an electric motor 9, a lower central cone 10, a conductive slip ring 11, a T-shaped coupler 12, a second stepping motor 13, an anchor claw 14, a bearing circular plate 15, a first limit sensor 16, a first support plate 17, a first slideway 18, a first nut 19, a sliding cutter block 20, a cutter 21, a positioning bearing 22, a second slideway 23, a second limit sensor 24, a cutter body centering column 25, a second nut 26, a second lead screw 27, a sliding chute 28, a through hole 29, a second press plate 30, a pin 31, a first press plate 32 and a second support plate 33.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Referring to fig. 1-11, the invention provides an electric cutting tool in an oil pipe, which comprises a mechanical anchor fluke mechanism and a cutting mechanism, wherein the mechanical anchor fluke mechanism is fixedly connected with the cutting mechanism;
the mechanical fluke mechanism comprises a first cylindrical component, a first driving part and a fluke component are arranged in the first cylindrical component, the fluke component penetrates through the first cylindrical component, and the first driving part is used for expanding and contracting the fluke component;
the cutting mechanism comprises a second cylinder assembly, a second driving portion, a third driving portion and a cutting assembly are arranged inside the second cylinder assembly, the cutting assembly penetrates through the second cylinder assembly, the third driving portion is used for expanding and contracting the cutting assembly, and the second driving portion is used for rotating the cutting assembly to achieve a cutting function.
Further preferred scheme, first drum subassembly includes first drum 1, second drum 2, and first drum 1 and the 2 tip rigid couplings of second drum, and first drum 1 top is provided with the circuit board box, sets up first drive division in the first drum 1, sets up fluke 14 subassembly in the second drum 2, and fluke 14 subassembly link up the 2 lateral walls of second drum, and with the 2 lateral walls sliding connection of second drum.
In a further preferred scheme, the first driving part comprises a first stepping motor 6 and a first lead screw 7, two ends of the first lead screw 7 are respectively connected with a bearing circular plate 15 in a shaft mode, the end part, close to the first stepping motor 6, of the first lead screw 7 penetrates through the bearing circular plate 15 and is fixedly connected with the output end of the first stepping motor 6, the first stepping motor 6 is fixedly connected to the inner wall of the first cylinder 1 and is connected with a circuit board box to provide fixed support for an electric cutter in the pipe and bear cutting counter force transmitted by a cutter 21 when the pipe is cut, a first nut 19 and an anchor claw 14 assembly are arranged on the outer side of the first lead screw 7, the first lead screw 7 is in threaded connection with the first nut 19, the side surface, far away from the first stepping motor 6, of the first nut 19 is fixedly connected with the anchor claw 14 assembly, the first stepping motor 6 is connected with the first lead screw 7 through an elastic coupling to provide power for expansion and contraction of the anchor claw 14.
In a further preferred scheme, the fluke 14 assembly comprises a central upper cone 8, a plurality of flukes 14 are connected to the conical surface of the central upper cone 8 in a contact manner, the plurality of flukes 14 are arranged in an annular array, first support plates 17 are sleeved on the outer sides of two ends of the central upper cone 8 and are in sliding connection with the first support plates 17, the side surface, away from the first stepping motor 6, of a first nut 19 is fixedly connected with the end portion of the central upper cone 8, a first limit sensor 16 is fixedly connected to the inner wall of the first cylinder 1 and is positioned on the outer side of the first nut 19 to play a role in limiting the movement of the central upper cone 8, a plurality of first slide ways 18 are communicated with the side wall of the second cylinder 2, the flukes 14 are embedded in the first slide ways 18 and are in sliding connection with the first slide ways 18, first press plates 32 are embedded at two ends of the first slide ways 18, first springs (not shown in the drawing) are arranged between the first press plates 32 and the flukes 14 and are used for retracting the flukes 14, and the mechanical flukes 14 mechanism is clamped in a forward rotation manner to push the first upper cone 8 to support the inner wall of the second cylinder 2 and provide a whole anchor for fixing cutter.
In a further preferable scheme, the second cylinder assembly comprises a third cylinder 3, a fourth cylinder 4 and a fifth cylinder 5, the end parts of the fourth cylinder 4 and the fifth cylinder 5 are fixedly connected, a second driving part is arranged in the third cylinder 3, a cutting assembly and a third driving part are arranged in the fourth cylinder 4 and the fifth cylinder 5, and the cutting assembly penetrates through the side wall of the fourth cylinder 4 and is in sliding connection with the side wall of the fourth cylinder 4.
Further preferred scheme, the second drive portion includes electric motor 9, conductive slip ring 11 and T type shaft coupling 12, electric motor 9 adopts big moment of torsion direct current gear motor (RS 775), electric motor 9 rigid coupling is in 3 inner walls of third cylinder, electric motor 9 output and conductive slip ring 11 one end rigid coupling, conductive slip ring 11 other end and T type shaft coupling 12 macrostoma rigid coupling, the one end that conductive slip ring 11 was kept away from to T type shaft coupling 12 macrostoma is with fourth cylinder 4 tip rigid coupling, T type shaft coupling 12 microstoma end and third drive portion coupling, electric motor 9 lower extreme links to each other with conductive slip ring 11 upper portion, provide power for intraductal electric cutter work.
In a further preferred scheme, the third driving part comprises a second stepping motor 13 and a second lead screw 27, the second stepping motor 13 is fixedly connected to the inner wall of the fifth cylinder 5, one end of the second lead screw 27 is fixedly connected to the output end of the second stepping motor 13, the other end of the second lead screw 27 is in shaft connection with the small end of the T-shaped coupler 12, a second nut 26 and a cutting assembly are arranged on the outer side of the second lead screw 27, the end, far away from the second stepping motor 13, of the second nut 26 is fixedly connected to the cutting assembly, the conductive sliding ring 11 is in shaft connection with the second lead screw 27 through the T-shaped coupler, the conductive sliding ring 11 can connect a lead to a rotary cutting component, the problem of lead winding is solved, a bearing capable of freely rotating around the conductive sliding ring is axially fixed on the second lead screw 27, and the bearing is sleeved in the bearing circular plate 15.
In a further preferred embodiment, the cutting assembly includes a central lower cone 10, a plurality of sliding cutter blocks 20 are connected to the conical surface of the central lower cone 10 in a contacting manner, the plurality of sliding cutter blocks 20 are arranged in an annular array, a cutter 21 is fixedly connected to the outer side of each sliding cutter block 20 perpendicularly, the cutter 21 is fixed inside each sliding cutter block 20, a pin 31 is arranged on the inner side of each sliding cutter block 20 and is in smooth contact with the central lower cone 10, a second support plate 33 is sleeved on the outer side of the central lower cone 10 and is in sliding connection with the second support plate 33, the side of the second nut 26 far away from the second stepping motor 13 is fixedly connected to the end of the central upper cone 8, a second limit sensor 24 is fixedly connected to the inner wall of the fifth cylinder 5, the second limit sensor 24 is arranged on the outer side of the second nut 26, a plurality of second slide ways 23 are penetrated through the side wall of the fourth cylinder 4, the sliding cutter blocks 20 are embedded in the second slide ways 23 and are in sliding connection with the second slide ways 23, second pressure plates 30 are arranged at two ends of the second slide ways 23, a second pressure plate 30 is arranged between the second pressure plate 30 and the sliding cutter block 20 and the second screw 27, the central lower cone 10 can be smoothly connected to the central lower cone 10, and the lower cone 10, the central screw rod 27, and the central screw rod can be lubricated by the lower cone 10, and the lower cone 10.
In a further preferable scheme, a plurality of positioning bearings 22 are fixedly connected to the outer side of the central lower cone 10, the plurality of positioning bearings 22 are arranged in an annular array, a plurality of sliding grooves 28 are axially formed in the inner wall of the fourth cylinder 4, the number of the positioning bearings 22 is preferably three in the embodiment, the number of the sliding grooves 28 is preferably three, the positioning bearings 22 are slidably connected with the sliding grooves 28, a plurality of cutter body centering columns 25 are connected to the outer side of the central lower cone 10 in a contact manner, the plurality of cutter body centering columns 25 penetrate through the side wall of the fourth cylinder 4 and are slidably connected with the side wall of the fourth cylinder 4, the number of the cutter body centering columns 25 is preferably three, through holes 29 are formed in the side wall of the fourth cylinder 4, the cutter body centering columns 25 penetrate through the through holes 29 and are slidably connected with the through holes 29, and the inner side of the sliding cutter block 20 is slidably connected with the central lower cone 10; the second lead screw 27 converts the rotational motion transmitted from the second stepping motor 13 into the up-and-down motion of the central lower cone 10; the central lower cone 10 mainly plays a role in expanding and contracting the cutter 21, the sliding cutter block 20 mainly plays a role in fixing the cutter 21, the second slideway 23 on the wall of the fourth cylinder 4 mainly plays a role in restraining the movement of the sliding cutter block 20, and the cutter 21 mainly plays a role in cutting an oil pipe; the cutter body righting column 25 is pushed out together with the sliding cutter block 20 to play a role in stabilizing and righting the cutter 21, and the through hole 29 on the wall of the fourth cylinder 4 plays a role in restraining the movement of the cutter body righting column 25.
In a further preferred scheme, the end parts of the second cylinder 2 and the third cylinder 3 are fixedly connected, the first lead screw 7 extends into the third cylinder 3, the bearing circular plate 15 close to the first stepping motor 6 is fixedly connected to the inner wall of the first cylinder 1, and the bearing circular plate 15 far away from the first stepping motor 6 is fixedly connected to the inner wall of the third cylinder 3.
The invention relates to a working principle of an electric cutting tool in an oil pipe, which comprises the following components:
when an oil pipe is cut, firstly, the tool is lowered to a specified position, then the anchor flukes 14 are expanded by operating a controller of a wellhead, and the whole tool is fixed on the pipe wall to provide conditions for the next cutting; during cutting, the second stepping motor 13 rotates in the forward direction, and transmits torque to the second lead screw 27, so as to drive the second lead screw 27 to rotate in the forward direction together. When the second lead screw 27 rotates, a relative motion is generated between the second lead screw 27 and the central lower cone 10, the central lower cone 10 rises under the action of the screw pair between the central lower cone 10 and the second lead screw 27, and the sliding cutter blocks 20 expand and expand outwards under the pushing action of the central lower cone 10. At the same time, the electric motor 9 rotates in the forward direction, rotating the fourth cylinder 4 with the cutter 21. The radial movement of the cutter 21 and the rotary cutting are simultaneous and continuous until the tube wall is cut and the movement is stopped. After the cutting is finished, the second stepping motor 13 rotates reversely, the second lead screw 27 also rotates reversely under the driving of the second stepping motor, the central lower cone 10 descends under the screw side effect between the central lower cone and the second lead screw 27, and the cutter 21 also contracts inwards under the driving of the central lower cone 10 and the action of the second pressing plate and the second spring until the initial state of the tool during cutting is reached. After the whole cutting process of the oil pipe is finished, the anchor fluke 14 shrinks the diameter to be unlocked, the oil pipe is separated, then the tool is taken out from the wellhead, and the cut oil pipe is taken out section by section to finish the cutting operation.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (4)
1. The utility model provides an electronic cutting means in oil pipe which characterized in that: the mechanical anchor fluke mechanism is fixedly connected with the cutting mechanism;
the mechanical fluke mechanism comprises a first cylindrical assembly, a first driving part and a fluke assembly are arranged in the first cylindrical assembly, the fluke assembly penetrates through the first cylindrical assembly, and the first driving part is used for expanding and contracting the fluke assembly;
the cutting mechanism comprises a second cylinder assembly, a second driving part, a third driving part and a cutting assembly are arranged in the second cylinder assembly, the cutting assembly penetrates through the second cylinder assembly, the third driving part is used for expanding and contracting the cutting assembly, and the second driving part is used for rotating the cutting assembly to realize a cutting function;
the first cylinder component comprises a first cylinder (1) and a second cylinder (2), the first cylinder (1) is fixedly connected with the end part of the second cylinder (2), a circuit board box is arranged at the top end of the first cylinder (1), the first driving part is arranged in the first cylinder (1), the fluke component is arranged in the second cylinder (2), and the fluke component penetrates through the side wall of the second cylinder (2) and is in sliding connection with the side wall of the second cylinder (2);
the first driving part comprises a first stepping motor (6) and a first lead screw (7), two ends of the first lead screw (7) are respectively connected with a bearing circular plate (15) in a shaft mode, the end part, close to the first stepping motor (6), of the first lead screw (7) penetrates through the bearing circular plate (15) and is fixedly connected with the output end of the first stepping motor (6), the first stepping motor (6) is fixedly connected to the inner wall of the first cylinder (1), a first nut (19) and an anchor claw assembly are arranged on the outer side of the first lead screw (7), the first lead screw (7) is in threaded connection with the first nut (19), and the side face, far away from the first stepping motor (6), of the first nut (19) is fixedly connected with the anchor claw assembly;
the anchor fluke component comprises a central upper cone (8), a plurality of anchor flukes (14) are connected to the conical surface of the central upper cone (8) in a contact manner, the anchor flukes (14) are arranged in an annular array manner, first supporting plates (17) are sleeved on the outer sides of two ends of the central upper cone (8) and are in sliding connection with the first supporting plates (17), the side face, far away from the first stepping motor (6), of a first nut (19) is fixedly connected with the end part of the central upper cone (8), a first limiting sensor (16) is fixedly connected to the inner wall of the first cylinder (1), the first limiting sensor (16) is positioned on the outer side of the first nut (19), a plurality of first slide ways (18) are arranged on the side wall of the second cylinder (2) in a penetrating manner, the anchor flukes (14) are embedded in the first slide ways (18) and are in sliding connection with the first slide ways (18), first pressing plates are embedded at two ends of the first slide ways (18), and first pressing plates are arranged between the first pressing plates and the anchor flukes (14);
the second cylinder assembly comprises a third cylinder (3), a fourth cylinder (4) and a fifth cylinder (5), the end parts of the fourth cylinder (4) and the fifth cylinder (5) are fixedly connected, the third cylinder (3) is internally provided with the second driving part, the fourth cylinder (4) and the fifth cylinder (5) are internally provided with the cutting assembly and the third driving part, and the cutting assembly penetrates through the side wall of the fourth cylinder (4) and is in sliding connection with the side wall of the fourth cylinder (4);
the second driving part comprises an electric motor (9), a conductive sliding ring (11) and a T-shaped coupler (12), the electric motor (9) is fixedly connected to the inner wall of the third cylinder (3), the output end of the electric motor (9) is fixedly connected with one end of the conductive sliding ring (11), the other end of the conductive sliding ring (11) is fixedly connected with the large opening end of the T-shaped coupler (12), one end, far away from the conductive sliding ring (11), of the large opening end of the T-shaped coupler (12) is fixedly connected with the end part of the fourth cylinder (4), and the small opening end of the T-shaped coupler (12) is in shaft connection with the third driving part;
the third drive division includes second step motor (13), second lead screw (27), second step motor (13) rigid coupling is in fifth drum (5) inner wall, second lead screw (27) one end with second step motor (13) output rigid coupling, second lead screw (27) other end with T type shaft coupling (12) osculum end coupling, second lead screw (27) outside be provided with second nut (26) with cutting assembly, second nut (26) are kept away from the tip of second step motor (13) with cutting assembly rigid coupling.
2. The power cutting tool in an oil pipe of claim 1, wherein: the cutting assembly comprises a center lower cone (10), wherein the center lower cone (10) is in conical surface contact connection with a plurality of sliding cutter blocks (20) and a plurality of annular arrays of the sliding cutter blocks (20), cutters (21) are fixedly connected to the outer sides of the sliding cutter blocks (20) perpendicularly, a second support plate (31) is sleeved on the outer side of the center lower cone (10) and is in sliding connection with the second support plate (31), a second nut (26) is far away from the side face of a second stepping motor (13) and the end portion of a center upper cone (8), a second limiting sensor (24) is fixedly connected to the inner wall of a fifth cylinder (5), the second limiting sensor (24) is located on the outer side of the second nut (26), a plurality of second slide ways (23) are communicated with the side wall of the fourth cylinder (4), the sliding cutter blocks (20) are arranged in the second slide ways (23) and are in sliding connection with the second slide ways (23), second press plates are embedded at two ends of the second slide ways (23), and a second spring is arranged between the second press plates and the sliding cutter blocks (20).
3. The in-tubing power cutting tool of claim 1, wherein: cone (10) outside rigid coupling has a plurality of location bearing (22), a plurality of under the center location bearing (22) annular array sets up, a plurality of spout (28) have been seted up to fourth drum (4) inner wall axial, location bearing (22) with spout (28) sliding connection, cone (10) outside contact is connected with a plurality of cutter body and rights post (25) under the center, a plurality of cutter body rights post (25) link up fourth drum (4) lateral wall, and with fourth drum (4) lateral wall sliding connection.
4. The in-tubing power cutting tool of claim 1, wherein: second drum (2) with rigid coupling between third drum (3) tip, first lead screw (7) stretch into in third drum (3), be close to first step motor (6) bearing plectane (15) rigid coupling is in first drum (1) inner wall, keeps away from first step motor (6) bearing plectane (15) rigid coupling is in third drum (3) inner wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110306481.9A CN112983323B (en) | 2021-03-23 | 2021-03-23 | Electric cutting tool in oil pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110306481.9A CN112983323B (en) | 2021-03-23 | 2021-03-23 | Electric cutting tool in oil pipe |
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| Publication Number | Publication Date |
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| CN112983323A CN112983323A (en) | 2021-06-18 |
| CN112983323B true CN112983323B (en) | 2022-11-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116181265B (en) * | 2023-03-22 | 2023-11-14 | 中国地质大学（北京） | Underground electric control cutting tool and application method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0108144D0 (en) * | 2001-03-31 | 2001-05-23 | Rotech Holdings Ltd | Downhoole tool |
| CN103089181B (en) * | 2013-01-14 | 2015-09-09 | 中国石油大学(华东) | Hydraulic cutter in pipe |
| CN104594817B (en) * | 2014-11-29 | 2016-08-24 | 牡丹江市金环石化设备有限公司 | A kind of tubing anchor with triple functions |
| CN108678696A (en) * | 2018-06-13 | 2018-10-19 | 北方斯伦贝谢油田技术（西安）有限公司 | A kind of positioning anchor tool |
| CN110644940B (en) * | 2019-11-08 | 2024-06-18 | 中国石油大学(北京) | Mechanical and electric cutting device for single-cylinder double-well casing of oil well |
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