CN114427365B - Remote control pipe cutting device and method taking cable as transmission carrier - Google Patents
Remote control pipe cutting device and method taking cable as transmission carrier Download PDFInfo
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- CN114427365B CN114427365B CN202011181902.1A CN202011181902A CN114427365B CN 114427365 B CN114427365 B CN 114427365B CN 202011181902 A CN202011181902 A CN 202011181902A CN 114427365 B CN114427365 B CN 114427365B
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- 238000005520 cutting process Methods 0.000 title claims abstract description 85
- 230000005540 biological transmission Effects 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000004873 anchoring Methods 0.000 claims abstract description 73
- 230000007246 mechanism Effects 0.000 claims description 77
- 230000001681 protective effect Effects 0.000 claims description 33
- 239000003638 chemical reducing agent Substances 0.000 claims description 21
- 230000007423 decrease Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 239000003208 petroleum Substances 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 7
- 238000010276 construction Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to the technical field of petroleum equipment, and particularly discloses a remote control pipe cutting device and a remote control pipe cutting method by taking a cable as a transmission carrier. The invention can realize that the cutting device is hung and conveyed to the well only through the cable without the aid of pipe rod conveying and pressure transmission, and remotely controls the invention on the ground through the cable to perform a series of works such as anchoring, cutting, tool withdrawal and the like, thereby solving the problems that the existing downhole pipe column cutting tool cannot work in a small-size pipe, the cutting control accuracy is poor and the like.
Description
Technical Field
The invention relates to the technical field of petroleum equipment, in particular to a remote control pipe cutting device and a remote control pipe cutting method by taking a cable as a transmission carrier.
Background
The pipe column is put into the well and is put out of the well to be constructed, which is an important working content in the production operation process of the oil field, and the pipe column is found to be longer in the well entering time in the construction, and is damaged or the pipe column string is accompanied with tool failure, so that the pipe column cannot be put out of the well, and great difficulty is caused to the production operation.
The conventional solutions are generally two, one is to lift the pipe column by adopting a large-load power device, and the method can lift a part of pipe column, but the pipe column is extremely easy to pull out irregularly, so that the pipe column is damaged, and the treatment difficulty is increased;
The other is to cut and drag out the pipe column above the stuck point, the well-reserved part is treated by other measures such as drilling and grinding, the existing cutting device mainly adopts mechanical cutting or hydraulic jet cutting, the cutting tool is required to be put into the cutting point by an oil pipe or a drill rod, and the cutting operation can be carried out by rotating the pipe column on the ground or applying hydraulic force, but when the pipe column is smaller in size or the cutting point is deeper, the existing cutting tool cannot be put into the designated cutting position at all, so that the operation cannot be carried out;
Patent number: 201410834622.4 discloses an integrated tool for cutting and salvaging a downhole tubular column and a construction method thereof, and a patent number CN02208475.4, and the two tools are connected with a ground driving device through connecting a drill string, a common oil pipe or a salvaging spear and the like when in use, and then are lowered to a designed cutting position, so that when the size of some tubular products is smaller or the cutting point is deeper, the operation cannot be implemented.
In addition, no matter mechanical cutting or water conservancy jet cutting, the cutting point can not be accurately positioned, so that the cutting section is irregular, external pipes are easy to accidentally injure, and the in-well accidents are complicated.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a remote control pipe cutting device and a remote control pipe cutting method using a cable as a transmission carrier, which are reasonable in structure, can realize that the cutting device is conveyed to a well only through the cable without the aid of pipe rod conveying and pressure transmission, and performs a series of works such as anchoring, cutting, tool withdrawal and the like through remote control on the ground, thereby solving the problems that the existing downhole pipe column cutting tool cannot work in a small-size pipe, and the cutting control accuracy is poor.
The technical scheme of the invention is as follows:
The remote control pipe cutting device taking the cable as a transmission carrier comprises a cable horse tap, a first power mechanism, an anchoring mechanism, a second power mechanism and a cutting mechanism which are arranged in series from top to bottom, wherein the cable horse tap is provided with the cable;
The first power mechanism comprises a first cylinder body, a controller, a first motor and a plunger pump are sequentially arranged in the first cylinder body from top to bottom, the controller is respectively and electrically connected with a cable and the first motor, the output end of the first motor is connected with the input end of the plunger pump, and the plunger pump is used for providing hydraulic power for the anchoring mechanism;
The second power mechanism comprises a second cylinder body, a second motor and a first speed reducer are sequentially arranged in the second cylinder body from top to bottom, the second motor is electrically connected with the controller, and an output shaft of the second motor is connected with an input shaft of the first speed reducer;
The cutting mechanism comprises a third cylinder body and a cutter head protective cap rotatably connected to the bottom of the third cylinder body;
the top of the tool bit protective cap is provided with a planetary gear set, a sun gear in the planetary gear set is connected with an output shaft of the first speed reducer through a transmission shaft, a gear ring in the planetary gear set is fixedly connected to the top of the tool bit protective cap, and a planet gear in the planetary gear set is rotationally connected to the bottom of the third cylinder;
the tool bit protective cap is internally provided with a worm gear set, a worm wheel in the worm gear set is arranged below a sun wheel and coaxially rotates with the sun wheel, and the worm is horizontally arranged below the worm wheel;
The tool bit protection cap is characterized in that a horizontal chute is arranged below the worm, a tool rest is connected to the chute in a sliding mode, a tooth groove meshed with the bottom of the worm is formed in the top of the tool rest, a blade is arranged on one side of the tool rest, the tool bit protection cap is arranged on one side, close to the blade, of the tool bit protection cap, and a knife outlet edge for extending out of the blade is formed.
Preferably, the anchoring mechanism comprises a tool outer cylinder, a piston and an anchoring groove communicated with the inner cavity of the tool outer cylinder;
The tool outer cylinder is internally provided with a hydraulic cavity for pushing the piston to move up and down, the hydraulic cavity is communicated with a hydraulic output end of the plunger pump, and the hydraulic cavity is provided with an oil filling hole;
the lower end of the piston is provided with a spring connected with the outer cylinder of the tool, the eccentric part of the piston is provided with a pushing shaft, the lower end of the pushing shaft is provided with a sliding block, the sliding block is rotationally connected with a movable supporting arm, the free end of the movable supporting arm is provided with an anchoring block, and the anchoring block extends out of an anchoring groove to realize anchoring when the sliding block moves downwards.
Preferably, the movable support arm comprises a first support arm rotationally connected with the sliding block and a second support arm rotationally connected with the first support arm, the movable end of the second support arm is rotationally connected with the outer tool cylinder, and the first support arm and the second support arm are in a herringbone structure.
Preferably, the anchoring blocks are at least 3 sets and are uniformly distributed in the circumferential direction of the tool outer cylinder.
Preferably, a pressure sensor electrically connected with the controller is further arranged in the hydraulic cavity.
Preferably, a group of anchoring mechanisms is further arranged between the second power mechanism and the cutting mechanism, a hollow shaft sleeve penetrating through the piston and the piston cavity is fixedly arranged in the tool outer cylinder in the group of anchoring mechanisms, and the transmission shaft is positioned in the hollow shaft sleeve.
Preferably, a second speed reducer is further arranged in the third cylinder and located between the sun gear and the transmission shaft, the sun gear is arranged at the output end of the second speed reducer, and the end part of the transmission shaft is connected with the input end of the second speed reducer.
Preferably, an upper centralizer is arranged at the top of the first power mechanism, and a lower centralizer is arranged at the top of the second power mechanism.
Preferably, the upper centralizer and the lower centralizer are rolling centralizers.
A cutting method of a remote control pipe cutting device taking a cable as a transmission carrier comprises the following steps:
1) Lowering the cutting device to a cutting point in the tubular column to be cut by using a cable winch;
2) A control instruction is sent on the ground through a cable, and a first motor is started to drive a plunger pump to work;
3) Providing hydraulic power for the anchoring mechanism through the plunger pump, and anchoring the tubular column;
4) The cable winch is controlled to lift up, and after the anchoring reliability of the anchoring mechanism is confirmed, the cable winch is restored;
5) The next control command is sent on the ground through a cable, the second motor is started to output power, and after the speed is reduced and the torque is increased, the power is transmitted to the planetary gear set;
6) The planetary gear set drives the tool bit protective cap and the worm and gear rotating set respectively, and the tool rest transversely moves through the transmission of the worm and gear set, so that the blade extends out of the tool outlet, and rotates along with the tool bit protective cap while extending out, and the tubular column is cut in a surrounding manner;
7) When the end part of the tubular column wellhead is vibrated or the cutting current suddenly decreases, the tubular column is cut off;
8) The next control instruction is sent on the ground through a cable, the second motor reversely rotates to reset the blade into the cutter head protective cap, then the second motor stops working, finally the first motor reversely rotates, the plunger pump releases pressure, and the anchoring mechanism is released from anchoring;
9) And controlling the cable winch to lift the cable to enter the next cutting point for cutting, or starting the device to finish cutting work.
Compared with the prior art, the invention has the following advantages:
when the hydraulic power supply device is used, the device is hung, powered and transmits control signals through the cable, after the device is lowered into the corresponding position in the pipe column, the plunger pump is driven through the first motor, hydraulic power is provided for the anchoring mechanism by the plunger pump, the device is firmly anchored in the pipe column, and compared with the mode of long-distance hydraulic conveying from the anchoring mechanism in the wellhead Xiang Jing, the hydraulic power supply device is more convenient to operate and assemble and more stable in provided hydraulic power;
After the torque is increased through the second motor through speed reduction, power is transmitted to the planetary gear set, the planetary gear set drives the tool bit protective cap and the worm gear set to rotate, and through the cooperation of the worm and the tool rest, the tool rest transversely moves, the blade stretches out from the outlet edge, and when the blade stretches out and rotates along with the tool bit protective cap, the tubular column is cut in a surrounding mode, so that the remote electric control of the underground tubular cutting device by the ground is realized, and the accurate cutting of the tubular column in the well is realized.
In addition, the invention has compact and simple structure, and compared with the prior equipment, the invention does not need to transmit power or hydraulic pressure to the underground cutting tool and the anchoring tool through oil pipes or drill pipes, thereby solving the difficult problem that the traditional equipment cannot enter a small-diameter pipe for carrying out operation due to complex connection and large volume.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of the first power mechanism and the anchoring mechanism;
FIG. 3 is a schematic view of a second power mechanism and a cutting mechanism;
In the figure: 1. cable, 2, cable tap, 3, upper centralizer, 4, first power mechanism, 5, anchoring mechanism, 6, lower centralizer, 7, second power mechanism, 8, second group anchoring mechanism, 9, cutting mechanism, 101, first cylinder, 102, controller, 103, first motor, 104, plunger pump, 105, hydraulic chamber, 106, pushing shaft, 107, slider, 108, first support arm, 109, anchor block, 110, second support arm, 111, oiling hole, 112, piston, 113, spring, 114, tool outer cylinder, 115, anchoring groove, 116, hollow shaft sleeve, 201, second cylinder, 202, second motor, 203, first decelerator, 204, transmission shaft, 205, second decelerator, 206, sun gear, 207, planetary gear, 208, gear ring, 209, blade, 210, third cylinder, 211, worm gear, 212, worm, 213, knife rest, 214, knife head cap.
Detailed Description
The invention is further illustrated by the following examples in connection with the accompanying drawings.
Example 1
Referring to fig. 1 to 3, a remote control pipe cutting device using a cable as a transmission carrier comprises a cable horse faucet 2, a first power mechanism 4, an anchoring mechanism 5, a second power mechanism 7 and a cutting mechanism 9 which are arranged in series from top to bottom, wherein the cable horse faucet 2 is provided with a cable 1, and the cable adopts an armor cable capable of bearing large tensile force.
The first power mechanism 4 comprises a first cylinder 101, a controller 102, a first motor 103 and a plunger pump 104 are sequentially arranged in the first cylinder 101 from top to bottom, the controller 102 is respectively electrically connected with the cable 1 and the first motor 103, the output end of the first motor 103 is connected with the input end of the plunger pump 104, and the plunger pump 104 is used for providing hydraulic power for the anchoring mechanism 5.
The second power mechanism 7 comprises a second cylinder 201, a second motor 202 and a first speed reducer 203 are sequentially arranged in the second cylinder 201 from top to bottom, the second motor 202 is electrically connected with the controller 102, and an output shaft of the second motor 202 is connected with an input shaft of the first speed reducer 203.
The cutting mechanism 9 includes a third barrel 210 and a bit guard 214 rotatably coupled to the bottom of the third barrel 210.
The top of the tool bit protective cap 214 is provided with a planetary gear set, a sun gear 206 in the planetary gear set is connected with an output shaft of the first speed reducer 203 through a transmission shaft 204, a gear ring 208 in the planetary gear set is fixedly connected to the top of the tool bit protective cap 214, and a planet gear 207 in the planetary gear set is rotatably connected to the bottom of the third cylinder 210.
The tool bit protective cap 214 is internally provided with a worm gear set, a worm wheel in the worm gear set is arranged below the sun wheel 206 and coaxially rotates with the sun wheel 206, and the worm 212 is horizontally arranged below the worm wheel.
The lower part of the worm 212 in the tool bit protective cap 214 is provided with a horizontal chute, the chute is connected with a tool rest 213 in a sliding way, the top of the tool rest 213 is provided with a tooth slot meshed with the bottom of the worm 212, one side of the tool rest 213 is provided with a blade 209, one side of the tool bit protective cap 214, which is positioned close to the blade 209, is provided with an outlet edge for the blade 209 to extend out, wherein the blade 209 can be made of various materials and sizes so as to cope with pipe columns with different materials and inner diameters for cutting.
The tool rest 213 can transversely reciprocate through the transmission of the worm and gear group, so that the tool discharging and retracting actions of the blade 209 at the tool discharging edge are realized.
When the hydraulic power supply device is used, the device is hung, powered and transmits control signals through the cable 1, after the device is lowered into a corresponding position in a pipe column, the plunger pump 104 is driven through the first motor 103, hydraulic power is provided for the anchoring mechanism 5 by the plunger pump 104, the device is firmly anchored in the pipe column, and compared with the mode of long-distance hydraulic transmission from the anchoring mechanism 5 in the wellhead Xiang Jing adopted at present, the hydraulic power supply device is more convenient to operate and assemble and more stable;
After the torque is increased through the speed reduction of the second motor 202, power is transmitted to the planetary gear set, the planetary gear set drives the tool bit protective cap 214 and the worm gear set to rotate, and the worm 212 is matched with the tool rest 213, so that the tool rest 213 transversely moves, the blade 209 extends out of the outlet edge, and the blade 209 surrounds and cuts a tubular column in the rotating process of the tool bit protective cap 214, thereby realizing remote electric control of the underground tubular column by the ground, and realizing accurate cutting of the underground tubular column.
In addition, the invention has compact and simple structure, and compared with the prior equipment, the invention does not need to transmit power or hydraulic pressure to the underground cutting tool and the anchoring tool through an oil pipe or a drill rod, thereby solving the difficult problem that the traditional equipment cannot enter a small-diameter pipe for carrying out operation due to complex connection and large volume
As a further preferable scheme of the present embodiment: the upper centralizer 3 is installed at the top of first power unit 4, and the lower centralizer 6 is installed at the top of second power unit 7, and wherein upper centralizer 3 and lower centralizer 6 are the rolling centralizer, through establishing ties one or more centralizers on this device, can play the effect of righting when putting this device down to the pit.
Example 2
Referring to fig. 1 to 3, a remote control pipe cutting device using a cable as a transmission carrier comprises a cable-operated faucet 2, a first power mechanism 4, an anchoring mechanism 5, a second power mechanism 7 and a cutting mechanism 9 which are arranged in series from top to bottom, wherein the cable-operated faucet 2 is provided with a cable 1.
The first power mechanism 4 comprises a first cylinder 101, a controller 102, a first motor 103 and a plunger pump 104 are sequentially arranged in the first cylinder 101 from top to bottom, the controller 102 is respectively electrically connected with the cable 1 and the first motor 103, the output end of the first motor 103 is connected with the input end of the plunger pump 104, and the plunger pump 104 is used for providing hydraulic power for the anchoring mechanism 5.
The second power mechanism 7 comprises a second cylinder 201, a second motor 202 and a first speed reducer 203 are sequentially arranged in the second cylinder 201 from top to bottom, the second motor 202 is electrically connected with the controller 102, and an output shaft of the second motor 202 is connected with an input shaft of the first speed reducer 203.
The cutting mechanism 9 includes a third barrel 210 and a bit guard 214 rotatably coupled to the bottom of the third barrel 210.
The top of the tool bit protective cap 214 is provided with a planetary gear set, a sun gear 206 in the planetary gear set is connected with an output shaft of the first speed reducer 203 through a transmission shaft 204, a gear ring 208 in the planetary gear set is fixedly connected to the top of the tool bit protective cap 214, and a planet gear 207 in the planetary gear set is rotatably connected to the bottom of the third cylinder 210.
The tool bit protective cap 214 is internally provided with a worm gear 211 and worm 212 group, worm gears in the worm gear 211 and worm 212 group are arranged below the sun gear 206 and rotate coaxially with the sun gear 206, and the worm 212 is horizontally arranged below the worm gears.
The lower part of the worm 212 in the tool bit protective cap 214 is provided with a horizontal chute, the chute is connected with a tool rest 213 in a sliding way, the top of the tool rest 213 is provided with a tooth slot meshed with the bottom of the worm 212, one side of the tool rest 213 is provided with a blade 209, the tool bit protective cap 214 is positioned on one side close to the blade 209, and a knife outlet for extending the blade 209 is formed.
The present embodiment is optimized based on embodiment 1, specifically:
referring to fig. 1 to 3, the anchoring mechanism 5 includes a tool outer cylinder 114, a piston 112, and an anchoring groove 115 communicating with the inner cavity of the tool outer cylinder 114.
The tool outer cylinder 114 is internally provided with a hydraulic cavity 105 for pushing the piston 112 to move up and down, the hydraulic cavity 105 is communicated with a hydraulic output end of the plunger pump 104, and the hydraulic cavity 105 is provided with an oil filling hole 111.
The lower end of the piston 112 is provided with a spring 113 connected with a tool outer cylinder 114, the eccentric part of the piston 112 is provided with a pushing shaft 106, the lower end of the pushing shaft 106 is provided with a sliding block 107, the sliding block 107 is rotatably connected with a movable supporting arm, the free end of the movable supporting arm is provided with an anchoring block 109, and the anchoring block 109 extends out of an anchoring groove 115 to realize anchoring when the sliding block 107 moves downwards.
In this embodiment, the anchoring mechanism 5 is further optimized, the first motor 103 drives the plunger pump 104 to work, the plunger pump 104 pumps hydraulic oil into the hydraulic cavity 105 to push the piston 112 to move, and then when the piston 112 pushes the sliding block 107 through the pushing shaft 106, the anchoring block 109 extends out of the anchoring groove 115 to realize anchoring.
Example 3
The present example was optimized on the basis of example 2, specifically:
Referring to fig. 1 to 3, the movable support arm includes a first support arm 108 rotatably coupled to the slider 107 and a second support arm 110 rotatably coupled to the first support arm 108, a movable end of the second support arm 110 is rotatably coupled to the tool outer cylinder 114, and the first support arm 108 and the second support arm 110 are in a "herringbone" structure.
By designing the first support arm 108 and the second support arm 110 in a herringbone structure, stability of the anchor block 109 during lateral movement is increased.
The anchor blocks 109 are at least 3 sets, are uniformly distributed in the circumferential direction of the tool outer cylinder 114, and stability in anchoring is further improved through the design of a plurality of sets of anchor blocks 109.
The pressure sensor electrically connected with the controller 102 is further arranged in the hydraulic cavity 105, and the pressure sensor can detect the change of the pressure in the hydraulic cavity 105 in real time, so that the working state of the anchoring block 109 can be fed back better.
Example 4
The present example was optimized on the basis of example 2, specifically:
as shown in fig. 3 and with reference to the drawings, a second set of anchoring means 8 is also provided between the second power means 7 and the cutting means 9.
The structure of this set of anchoring mechanisms is substantially the same as the structure of the anchoring mechanism 5 in the above-described embodiment 2, except that: the tool outer cylinder 114 of the anchoring mechanism 5 is also fixedly provided with a hollow shaft sleeve 116 penetrating the piston and the piston cavity, the transmission shaft 204 is positioned in the hollow shaft sleeve 116, the hydraulic cavity of the second anchoring mechanism 8 is communicated with the hydraulic output end of the plunger pump 104 through a pipeline, and in addition, the lower end of the tool outer cylinder 114 can be also provided with a shaft seal matched with the transmission shaft 204.
The firmness in anchoring is further improved through the cooperation of a plurality of sets of anchoring mechanisms.
By providing the hollow sleeve 116 in the tool outer barrel 114, the drive shaft 204 can be passed through, so that a power transmission from the second power mechanism 7 via the drive shaft 204 down to the cutting mechanism 9 is achieved.
Example 5
The present example was optimized on the basis of example 4, specifically:
a second speed reducer 205 is further arranged between the sun gear 206 and the transmission shaft 204 in the third cylinder 210, the sun gear 206 is installed at the output end of the second speed reducer 205, and the end of the transmission shaft 204 is connected with the input end of the second speed reducer 205.
The power torque transmitted to the cutting device 9 is further increased by the addition of the second decelerator 205 in cooperation with the first decelerator 203.
Example 6
A cutting method of a remote control pipe cutting device taking a cable as a transmission carrier comprises the following steps:
1) The cable winch is used for controlling the cable 1 to be put into a cutting point in a tubular column to be cut;
2) A control command is sent on the ground through a cable 1, and a first motor 103 is started to drive a plunger pump 104 to work;
3) The plunger pump 104 provides hydraulic power for the anchoring mechanism 5 to anchor the pipe column;
4) The cable winch is controlled to lift the cable 1, and after the anchoring reliability of the anchoring mechanism 5 is confirmed, the cable winch is restored;
5) The next control command is sent on the ground through the cable 1, the second motor 202 is started to output power, and after the speed is reduced and the torque is increased, the power is transmitted to the planetary gear set;
6) The planetary gear sets respectively drive the tool bit protective cap 214 and the worm gear sets to rotate, and the tool rest 213 is transversely moved through the transmission of the worm gear sets, so that the blade 209 extends out of the outlet edge, and when the blade 209 rotates along with the tool bit protective cap 214, the tubular column is cut in a surrounding manner;
7) When the end part of the tubular column wellhead is vibrated or the cutting current suddenly decreases, the tubular column is cut off;
8) The next control instruction is sent on the ground through the cable 1, the second motor 202 rotates reversely, the blade 209 is reset into the cutter head protective cap 214, then the second motor 202 stops working, finally the first motor 103 rotates reversely, the plunger pump 104 releases pressure, and the anchoring mechanism 5 is released;
9) The control cable winch lifts the cable 1 up to enter the next cutting point for cutting, or starts the device to finish cutting work.
Claims (6)
1. A remote control pipe cutting device taking a cable as a transmission carrier is characterized in that: the cable cutting device comprises a cable faucet, a first power mechanism, an anchoring mechanism, a second power mechanism and a cutting mechanism which are arranged in series from top to bottom, wherein a cable is arranged on the cable faucet;
The first power mechanism comprises a first cylinder body, a controller, a first motor and a plunger pump are sequentially arranged in the first cylinder body from top to bottom, the controller is respectively and electrically connected with a cable and the first motor, the output end of the first motor is connected with the input end of the plunger pump, and the plunger pump is used for providing hydraulic power for the anchoring mechanism;
The second power mechanism comprises a second cylinder body, a second motor and a first speed reducer are sequentially arranged in the second cylinder body from top to bottom, the second motor is electrically connected with the controller, and an output shaft of the second motor is connected with an input shaft of the first speed reducer;
The cutting mechanism comprises a third cylinder body and a cutter head protective cap rotatably connected to the bottom of the third cylinder body;
the top of the tool bit protective cap is provided with a planetary gear set, a sun gear in the planetary gear set is connected with an output shaft of the first speed reducer through a transmission shaft, a gear ring in the planetary gear set is fixedly connected to the top of the tool bit protective cap, and a planet gear in the planetary gear set is rotationally connected to the bottom of the third cylinder;
the tool bit protective cap is internally provided with a worm gear set, a worm wheel in the worm gear set is arranged below a sun wheel and coaxially rotates with the sun wheel, and the worm is horizontally arranged below the worm wheel;
the tool bit protective cap is internally provided with a horizontal chute below the worm, the chute is connected with a tool rest in a sliding way, the top of the tool rest is provided with a tooth slot meshed with the bottom of the worm, one side of the tool rest is provided with a blade, and the tool bit protective cap is provided with a knife edge for extending out the blade;
The anchoring mechanism comprises a tool outer cylinder, a piston and an anchoring groove communicated with the inner cavity of the tool outer cylinder;
The tool outer cylinder is internally provided with a hydraulic cavity for pushing the piston to move up and down, the hydraulic cavity is communicated with a hydraulic output end of the plunger pump, and the hydraulic cavity is provided with an oil filling hole;
The lower end of the piston is provided with a spring connected with the outer cylinder of the tool, the eccentric part of the piston is provided with a pushing shaft, the lower end of the pushing shaft is provided with a sliding block, the sliding block is rotationally connected with a movable supporting arm, the free end of the movable supporting arm is provided with an anchoring block, and the anchoring block extends out of an anchoring groove to realize anchoring when the sliding block moves downwards; a group of anchoring mechanisms are further arranged between the second power mechanism and the cutting mechanism, a hollow shaft sleeve penetrating through the piston and the piston cavity is fixedly arranged in the tool outer cylinder in the group of anchoring mechanisms, and the transmission shaft is positioned in the hollow shaft sleeve;
An upper centralizer is arranged at the top of the first power mechanism, and a lower centralizer is arranged at the top of the second power mechanism; the upper centralizer and the lower centralizer are rolling centralizers.
2. The remote control pipe cutting device using a cable as a transmission carrier according to claim 1, wherein: the movable support arm comprises a first support arm rotationally connected with the sliding block and a second support arm rotationally connected with the first support arm, the movable end of the second support arm is rotationally connected with the tool outer cylinder, and the first support arm and the second support arm are of a 'herringbone' structure.
3. The remote control pipe cutting device using a cable as a transmission carrier according to claim 2, wherein: the anchoring blocks are at least 3 sets and are uniformly distributed on the circumference of the tool outer cylinder.
4. The remote control pipe cutting device using a cable as a transmission carrier according to claim 2, wherein: and a pressure sensor electrically connected with the controller is also arranged in the hydraulic cavity.
5. The remote control pipe cutting device using a cable as a transmission carrier according to claim 4, wherein: the third cylinder is internally provided with a second speed reducer between the sun gear and the transmission shaft, the sun gear is arranged at the output end of the second speed reducer, and the end part of the transmission shaft is connected with the input end of the second speed reducer.
6. A cutting method of a remote control pipe cutting device using a cable as a transmission carrier according to any one of claims 1 to 5, wherein: the method comprises the following steps:
1) Lowering the cutting device to a cutting point in the tubular column to be cut by using a cable winch;
2) A control instruction is sent on the ground through a cable, and a first motor is started to drive a plunger pump to work;
3) Providing hydraulic power for the anchoring mechanism through the plunger pump, and anchoring the tubular column;
4) The cable winch is controlled to lift up, and after the anchoring reliability of the anchoring mechanism is confirmed, the cable winch is restored;
5) The next control command is sent on the ground through a cable, the second motor is started to output power, and after the speed is reduced and the torque is increased, the power is transmitted to the planetary gear set;
6) The planetary gear set drives the tool bit protective cap and the worm and gear rotating set respectively, and the tool rest transversely moves through the transmission of the worm and gear set, so that the blade extends out of the tool outlet, and rotates along with the tool bit protective cap while extending out, and the tubular column is cut in a surrounding manner;
7) When the end part of the tubular column wellhead is vibrated or the cutting current suddenly decreases, the tubular column is cut off;
8) The next control instruction is sent on the ground through a cable, the second motor reversely rotates to reset the blade into the cutter head protective cap, then the second motor stops working, finally the first motor reversely rotates, the plunger pump releases pressure, and the anchoring mechanism is released from anchoring;
9) And controlling the cable winch to lift the cable to enter the next cutting point for cutting, or starting the device to finish cutting work.
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| CN202011181902.1A CN114427365B (en) | 2020-10-29 | 2020-10-29 | Remote control pipe cutting device and method taking cable as transmission carrier |
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| CN114427365A CN114427365A (en) | 2022-05-03 |
| CN114427365B true CN114427365B (en) | 2024-07-19 |
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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 |
| CN116398076B (en) * | 2023-05-04 | 2024-01-19 | 西南石油大学 | Oil gas production pipe column cutting method |
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| CN105401900A (en) * | 2015-11-19 | 2016-03-16 | 北京美高科技发展有限公司 | Cable type electrohydraulic control pipe cutting tool |
| CN114427361A (en) * | 2020-10-29 | 2022-05-03 | 中国石油化工股份有限公司 | Electro-hydraulic anchoring tool and anchoring method thereof |
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| GB2373266B (en) * | 2001-03-13 | 2004-08-18 | Sondex Ltd | Apparatus for anchoring a tool within a tubular |
| CN102828716B (en) * | 2012-09-18 | 2015-03-18 | 东北石油大学 | Sealed type hydraulic driving adjustable speed cutter of oil pipe string with diameter being phi 73mm or greater |
| CN105134118A (en) * | 2015-07-22 | 2015-12-09 | 中国石油化工股份有限公司 | Cutting method for coiled tubing cutting tool string |
| CN205117265U (en) * | 2015-11-19 | 2016-03-30 | 北京美高科技发展有限公司 | Cable formula electrohydraulic control cuts piping tool |
| CN105649128A (en) * | 2016-03-21 | 2016-06-08 | 赵子宁 | Automatic excavation, laying, filling and leveling device of underground cables |
| CN107191150B (en) * | 2017-08-02 | 2020-03-31 | 西南石油大学 | Variable-diameter hydraulic cutting knife for cutting casings with different diameters by utilizing multi-head spiral transmission |
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| CN111425158B (en) * | 2019-01-10 | 2023-12-22 | 中国石油天然气股份有限公司 | Downhole tubular column cutting device for oil well and use method thereof |
| CN110130847B (en) * | 2019-04-23 | 2021-08-06 | 中国石油天然气集团有限公司 | Cable transmission downhole gear type tapping tool |
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| 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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| CN105401900A (en) * | 2015-11-19 | 2016-03-16 | 北京美高科技发展有限公司 | Cable type electrohydraulic control pipe cutting tool |
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