CN211008532U - Electric cutting execution system for underground pipe column - Google Patents
Electric cutting execution system for underground pipe column Download PDFInfo
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- CN211008532U CN211008532U CN201920887826.2U CN201920887826U CN211008532U CN 211008532 U CN211008532 U CN 211008532U CN 201920887826 U CN201920887826 U CN 201920887826U CN 211008532 U CN211008532 U CN 211008532U
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Abstract
The utility model discloses a can carry out electronic cutting actuating system of tubular column in pit of electronic cutting in pit to one set of actuating system of not unidimensional oil jacket pipe wall of a well under high temperature, high-pressure environment. The utility model discloses a cutting tool bit revolution system, cutting head rotation system, cutting head deflection system. The motor finally acts the same torque on the blade after passing through the main transmission shaft, the auxiliary transmission shaft and the planet wheel on the blade main shaft, thereby ensuring that the torque of the blade can realize the torque same as the high-speed rotation torque; the electric cutting execution system can rotate per se, so that the purpose of circumferential cutting along the central line of the pipe barrel is achieved; the cutting head is deflected by the deflecting cutting system of the blade itself. Under the combined cooperation action of the high-speed cutting tool bit system, the cutting head autorotation system and the cutting head deflection system, the underground pipe column cutting execution system can accurately control the cutting angle and the cutting position of the tool bit, and the purpose that the same underground cutting execution system can cut oil casings with different sizes is achieved.
Description
Technical Field
The utility model relates to an electronic cutting actuating system of tubular column in pit in being used for well workover and well completion operation oil casing's cutting means field.
Background
Cutting techniques are now widely used in oil casing cutting operations for workover operations, casing or riser cutting operations for offshore drilling well abandonment operations, and cutting operations for stuck drill pipes. The existing pipe fitting cutting modes mainly comprise a hydraulic cutting technology and an explosion cutting technology. The hydraulic cutting technology controls cutting movement by means of circulating slurry discharge, the stability of circulating pump pressure is kept in the process, if the pressure is large in fluctuation, blades are easy to break, a hydraulic cutting knife is of an unreleasable type, and the hydraulic cutting knife is strictly carried out according to operation steps before going down a well and during cutting. The technology has the disadvantages of complex construction, main body occupation by human intervention and more complicated operation steps. The explosive cutting technology is a technological method for cutting off a pipe column after an energy-gathering cutting bullet is put to a position above a clamping point and is detonated. The energy-gathering cutting bomb is made of explosive materials, has certain dangerousness, needs to be strictly operated and processed according to the operation procedures of inflammable, explosive and dangerous goods during transportation operation and the like, is difficult to popularize comprehensively in regions such as Xinjiang and Qinghai, and is easy to block after the outer end of a cut fracture protrudes outwards and is lifted. Overview two conventional downhole tubular cutting techniques require that the above operations be performed after the problematic tubular set position locator has been positioned.
In the process of petroleum downhole operation service, a system tool is required to be capable of stably outputting work in a high-temperature and high-pressure resistant environment, so that the motor cutting execution system needs to solve the following main problems: (1) the structure of the system is limited by the inner diameter of the underground pipe column, the structure is extremely compact, and the high integration is required in design; (2) the design of the deflection coefficients of the sun gear and the planetary gear of the transmission system must meet the output requirement; (3) in order to adapt to the cutting of pipe columns of different sizes and wall thicknesses, software and hardware optimization and matching of the rotary cutting head system and the tool bit deflection system are required.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to prior art's not enough, provide a high integrated tubular column electric cutting actuating system in pit of working, collection depth sounding, location, anchoring and cutting as an organic whole under the high temperature high pressure environment.
For solving the above technical problem, the utility model discloses a technical scheme is:
the underground pipe column electric cutting execution system comprises a fastening shell, a cutting head rotation system, a cutting head revolution system and a cutting head deflection system; the cutting tool bit autorotation system comprises a main transmission shaft, an auxiliary transmission shaft, a blade main shaft, a blade and a tool bit seat, wherein the main transmission shaft, the auxiliary transmission shaft and the blade main shaft sequentially form gear transmission, the blade is arranged on the tool bit seat, and the tool bit seat is arranged on the blade main shaft; the cutting head revolution system comprises an input shaft, a speed reducer, a rotary seat and a rotary shell, wherein the input shaft is sleeved outside a main transmission shaft and is fixedly connected with the main transmission shaft, the input shaft is sequentially connected with the rotary seat and the rotary shell through the speed reducer, and a secondary transmission shaft is arranged below the rotary seat and can rotate relative to the rotary seat; the cutting head deflection system comprises a transfer rod, a sliding block, a spiral rod and a cutter clamping piece rotating seat, the sliding block and the spiral rod form spiral transmission matching, the sliding block rotates to drive the spiral rod to eccentrically move, the cutter clamping piece rotating seat is fixedly connected with the spiral rod, a blade main shaft is installed on the cutter clamping piece rotating seat, and an auxiliary transmission shaft, the sliding block and the spiral rod are installed in a rotating shell.
The above scheme further comprises:
the slider in-connection transmission pole, the transmission pole realizes flexible through the motor that links to each other with it, the slider has outward with hob matched with track, the relative position is fixed through fixed key and hob to the cutter holder piece swivel mount.
The speed reducer is a multi-stage planetary speed reducer; the input shaft is connected with the first-stage planetary reducer and then sequentially connected with the planetary reducer behind the first-stage planetary reducer, and the last-stage planetary reducer is connected with the rotating seat through fastening screws.
The planetary reducer is four reduction gears and includes: the planet carrier A with three planet wheels, the rear end of the planet carrier A is connected with the same planet carrier B with three planet wheels, the rear end of the planet carrier B is connected with a speed reduction stage planet carrier C with three planet wheels, the planet carrier C is connected with a speed reduction planet carrier with three speed reduction planet wheels, and the speed reduction planet carrier is connected with the rotating seat through a fastening screw.
The reduction ratio of the planetary reducer is-in.
A speed reducer shell is further sleeved on the outer side of the input shaft above the fastening shell, and a ball bearing is arranged between the input shaft and the speed reducer shell.
The rotary shell is fixedly connected with a rotating head below, a groove is formed in the rotating head, and the blade main shaft, the tool clamp sheet rotating seat and the blade are all installed in the groove of the rotating head.
And a driving gear is arranged between the auxiliary transmission shaft and the blade main shaft.
The rotating seat is connected with the fastening shell through a centering bearing A and a centering bearing B; a centering bearing C is arranged between the main transmission shaft and the rotary seat, and a centering bearing D is arranged between the rotary seat and the auxiliary transmission shaft; a righting bearing is arranged between the blade main shaft and the tool holder blade rotating seat.
The rotary housing fixes the axial position of the rotary base, the rotary housing and the rotary head by fastening bolts.
The utility model discloses tubular column cutting actuating system in pit divide into cutter head revolution system, cutting head rotation system, cutting head deflection system. The motor rotating at a high speed finally acts on the blade after passing through the torque transmission of the planet wheels on the main transmission shaft, the auxiliary transmission shaft and the blade main shaft, so that the torque of the blade can be the same as the torque of the high-speed rotation, and the purpose of optimal torque transmission of the blade for cutting the well wall is achieved; the high-torque motor firstly acts the torque on the input shaft through the coupler, and the rear end of the input shaft is decelerated through the four-stage speed reducer, so that the torque is finally transmitted from high to low and acts on the body of the electric cutting execution system, the electric cutting execution system can rotate per se, and the purpose of circumferential cutting along the central line of the pipe barrel is achieved; the deflection cutting system of the blade is realized by the interaction of a slide block connected with a driving shaft, when the slide block receives the pulling force of a torque, the spiral shaft generates a certain deflection angle under the matching action of the surface of the slide block and the spiral groove on the surface of the spiral shaft, so that the cutting tool bit deflects, the precision control of the rotating speed of a motor is realized through a Hall detection system with countless direct current servo points at the front end, and the deflection angle of the cutting tool bit is converted through geometric conversion, so that the precision controllability of the cutting radius is realized. Under the combined cooperation action of the high-speed cutting tool bit system, the cutting head autorotation system and the cutting head deflection system, the underground pipe column cutting execution system can accurately control the cutting angle and the cutting position of the tool bit, and the purpose that the same underground cutting execution system can cut oil casings with different sizes is achieved.
The utility model discloses electric cutting technical system has mainly solved the operation complicacy that two kinds of current cutting techniques exist, the cutting success rate is low, integrated rate shortcoming such as low, mainly possesses following advantage: (1) compact structure, reliable performance and high cutting success rate; (2) the cutting depth is accurate, and the cut is smooth; (3) the technical problem that the inner walls of the oil sleeves with different sizes can be cut by one set of electric cutting system is solved; (4) the construction process is simple; (5) the cutting problem of the underground pipe column can be solved efficiently, quickly and perfectly.
Drawings
FIG. 1 is a general structure diagram of an electric cutting execution system for a downhole tubular column of the present invention;
FIG. 2 is a tool bit rotation system distribution diagram of the downhole tubular column electric cutting execution system of the present invention;
FIG. 3 is a cross-sectional view taken along line K1-K1 of FIG. 2;
FIG. 4 is a cross-sectional view taken along line K2-K2 of FIG. 2;
FIG. 5 is a cross-sectional view taken along line K3-K3 of FIG. 2;
FIG. 6 is a cross-sectional view taken along line K4-K4 of FIG. 2;
FIG. 7 is a cross-sectional view taken along J-YJCD of FIG. 2;
fig. 8 is a sectional view taken along G-EJCD of fig. 2.
In the figure: 1. the coupling comprises a coupling body, 2 keys A, 3 a main transmission shaft, 4 ball bearings, 5 an input shaft, 6 a reducer shell, 7 planet wheels A, 8 planet wheels A, 9 planet wheels B, 10 planet wheels B, 11 planet wheels C, 12 planet wheels C, 13 speed reduction planet wheels, 14 speed reduction planet wheels, 15 fastening screws, 16 fastening shells, 17 rotating seats, 18 centering bearings A, 19 centering bearings B, 20 bolts, 21 rotating shells, 22 centering bearings C, 23 centering bearings D, 24 auxiliary transmission shafts, 25 sliding blocks, 26 spiral rods, 27 keys B, 28 rotating heads, 29 cutter holder rotating seats, 30 centering bearings E, 31 cutter wing main shafts, 32 driving gears, 33 centering bearings F, 34 centering bearings G, 35 centering bearings H, 36 centering bearings I, 37 cutter holder seats, 38. the cutter blade 39, the framework oil seal 40, the cutter cap 41, the driving motor 42, the transmission rod 43 and the connecting fixing key.
Detailed Description
The invention is further described with reference to the drawings and the detailed description.
Example 1:
the electric cutting execution system of the underground pipe column comprises a fastening shell 16, a cutting head rotation system, a cutting head revolution system and a cutting head deflection system; the cutting tool bit autorotation system comprises a main transmission shaft 3, an auxiliary transmission shaft 24, a blade main shaft 31, a blade 38 and a tool bit seat 37, wherein the main transmission shaft 3, the auxiliary transmission shaft 24 and the blade main shaft 31 sequentially form gear transmission, the blade 38 is arranged on the tool bit seat 37, and the tool bit seat 37 is arranged on the blade main shaft 37; the cutting head revolution system comprises an input shaft 5, a speed reducer, a rotary seat 17 and a rotary shell 21, wherein the input shaft 5 is sleeved outside a main transmission shaft 3 and is fixedly connected with the main transmission shaft 3, the input shaft 5 is sequentially connected with the rotary seat 17 and the rotary shell 21 through the speed reducer, and a secondary transmission shaft 24 is arranged below the rotary seat 17 and can rotate relative to the rotary seat 17; the cutting head deflection system comprises a transmission rod 42, a sliding block 25, a screw rod 26 and a cutter clamping piece rotary seat 29, wherein the sliding block 25 and the screw rod 26 form spiral transmission fit, the rotation of the sliding block 25 drives the screw rod 26 to eccentrically move, the cutter clamping piece rotary seat 29 is fixedly connected with the screw rod 26, a blade main shaft 31 is installed on the cutter clamping piece rotary seat 29, and a secondary transmission shaft 24, the sliding block 25 and the screw rod 26 are installed in a rotary shell 21.
Example 2:
based on the above embodiment 1, further comprising:
the inside of the sliding block 25 is connected with a transmission rod which can stretch out and draw back through a motor connected with the transmission rod, the outside of the sliding block 25 is provided with a track matched with the screw rod 26, and the tool clamping piece rotary seat 29 is fixed at the relative position with the screw rod 26 through a fixed key.
The speed reducer is a multi-stage planetary speed reducer; the input shaft 5 is connected with a first-stage planetary reducer and then sequentially connected with a planetary reducer behind the first-stage planetary reducer, and a last-stage planetary reducer is connected with a rotating seat 17 through a fastening screw 15.
The planetary reducer is four reduction gears and includes: planet carrier A8 with three planet wheels A7, planet carrier A8 is connected with the same planet carrier B10 with three planet wheels B9 at the rear end, planet carrier B10 is connected with a planet carrier C12 with three planet wheels C11 at the rear end of a reduction gear stage, planet carrier C12 is connected with a reduction gear planet carrier 14 with three reduction gear planet wheels 13 at the rear end, and the reduction gear planet carrier 14 is connected with a rotary base 17 through fastening screws 15.
The reduction ratio of the planetary speed reducer is 1: 100-200.
A reducer housing 6 is further sleeved on the outer side of the input shaft 5 above the fastening housing 16, and a ball bearing 4 is arranged between the input shaft 5 and the reducer housing 6.
A rotating head 28 is fixedly connected to the lower portion of the rotating housing 21, a groove is formed in the rotating head 28, and a blade spindle 31, a tool holder blade rotating base 29 and a blade 38 are all installed in the groove of the rotating head 28.
A driving gear 32 is arranged between the auxiliary transmission shaft 24 and the blade main shaft 31.
The rotary seat 17 is connected with the fastening shell 16 through a centering bearing A18 and a centering bearing B19; a centering bearing C22 is arranged between the main transmission shaft 3 and the rotating seat 17, and a centering bearing D23 is arranged between the rotating seat 17 and the auxiliary transmission shaft 24; a centering bearing E30 is arranged between the blade main shaft 31 and the cutter holder piece rotary seat 29, a centering bearing H35 and a centering bearing I36 are arranged between the blade main shaft 31 and the cutter head seat 37, and a centering bearing F33 and a centering bearing G34 are arranged between the auxiliary transmission shaft 24 and the cutter holder piece rotary seat 29.
A cutter head 40 is provided between the blade spindle 31 and the cutter blade 38, and a skeleton oil seal 39 is provided between the blade spindle 31 and the cutter head holder 37.
The swivel housing 21 fixes the axial positions of the swivel base 17, the swivel housing 21, and the swivel head 28 by the fastening bolt 20.
Exemplary embodiment 3:
referring to the attached figure 1, the electric cutting execution system of the underground pipe column is mainly divided into three parts: a revolution system of a high-speed cutting tool bit, a rotation system of a cutting head and a deflection system of the cutting head. Fig. 2 is a structural view of a cutter head rotation system, fig. 3, 4, 5 and 6 are structural sectional views of a sun gear and a planetary gear of a four-stage planetary gear reducer, fig. 7 shows a sectional structure of a main transmission shaft and a secondary transmission shaft transmission mechanism, and fig. 8 shows a sectional structure of a secondary transmission shaft and a blade main shaft transmission.
The power of the high-speed cutting knife head system is derived from the torque transmitted by the driving motor 41 driving the coupler 1, and the main transmission shaft 3 connected with the coupler 1 is fixed in the axial direction by means of the key 2 in the key groove. The gear at the end of the main drive shaft 3 transmits the torque to the secondary drive shaft 24 through the gear, the secondary drive shaft 24 transmits the torque to the blade main shaft 31 with the same gear through the drive gear 32, and the fixing between the two is carried out by the fixing key in the key slot for axial fixing of the position. The blade main shaft 31 is connected with the tool bit seat 37 through threads, the blade 38 is positioned on the tool bit seat 37, the torque on the high-speed rotating coupling 1 finally acts on the blade of the cutting knife 38 through the transmission of the multi-stage gear, and the function that the high-speed cutting tool bit cuts the inner wall of the pipe fitting at high speed is achieved.
The power of the cutting bit autorotation system is also from the coupler 1, the input shaft 5 connected with the coupler 1 is axially fixed through a fixed key in the key groove, and the torque of the coupler 1 acts on the input shaft 5. The ball bearing 4 is provided between the input shaft 5 and the reducer case 6, so that the reducer case 6 does not increase with an increase in torque on the input shaft 5. A gear wheel at the rear end of the input shaft 5 transfers the torque step by step to a planet carrier A8 with three planet wheels a7, which transfer the torque in stages. The rear end of the planet carrier A8 is connected with an identical planet carrier B10 with three planet wheels B9. The rear end of the planet carrier B10 is connected with a planet carrier C12 with three planet wheels C11 of a reduction gear stage, and the torque is reduced to 1: 5. The carrier C12 is followed by a reduction carrier 14 with three reduction planet gears 13, which have a reduction ratio of 1:200 compared to the initial torque transfer. The speed reduction planet carrier 14 is connected with the rotating base 17 through three fastening screws 15, so that the speed reduction transmission of the coupler 1 is realized, and the torque is acted on the rotating base 17. The rotary seat 17 is connected with the fastening housing 16 through the centering bearing a18 and the centering bearing B19, and finally, a torque separation is formed, so that the fastening housing 16 does not rotate along with the transmission of the rotary seat 17. A centering bearing C22 is arranged between the main transmission shaft 3 and the rotating seat 17, and a centering bearing D23 is arranged between the rotating seat 17 and the auxiliary transmission shaft 24, so that the torque of the rotating seat 17 does not act on the main transmission shaft 3 and the auxiliary transmission shaft 24, and the torque transmission of the high-speed cutter head system is not influenced. The five elongated fastening screws in the swivel housing 21 fix the axial position of the swivel base 17, the swivel housing 21 and the swivel head 28, so that the torques of the three are the same, and the swivel housing 21 and the swivel head 28 rotate together with the swivel base 17. This process has finally realized that shaft coupling 1 of whole tool bit portion has carried out multistage deceleration, has transmitted the moment of torsion to the cutting tool bit portion at last, and when the high-speed rotatory cutting of blade 38, the cutting tool bit itself also can use final drive shaft 3 to carry out the revolution relatively reduction gear casing 6 as the center, has reached the purpose of carrying out the circumference cutting along the bobbin central line.
The deflection system of the cutting head is achieved by the movement of the cooperating tracks of the slider 25 and the transfer bar 42. When the transmission rod 42 generates torque under the action of the driving motor 41, the slider 25 at the lowest end of the transmission rod 42 generates a leftward pulling force to the slider 25 under the action of the screw thread, the slider 25 at the lowest end of the transmission rod 42 is connected and fixed by the connecting and fixing key 43, and the screw rod 26 finally generates an axial deflection angle under the action of the matching screw track of the outer surface of the slider 25 and the screw rod 26. The blade 38 is mounted on the blade mount 37, the blade mount 37 is mounted on the blade spindle 31, the blade spindle 31 is mounted on the blade mount 29, and the blade mount 29 is fixed in position relative to the screw rod 26 by a fixing key. When the screw 26 is radially angled, the associated blade holder block swivel mount 29 is also angled at the same angle, and the resulting torque on the blade 38 causes the blade 38 to be axially angled relative to the home position. The deflection process of the cutting tool bit deflection system is realized, the radial extension of the blade 38 to the outside of the reducer shell 6 is finally changed in the deflection process, and the purpose of cutting different pipe column wall thicknesses is realized. In order to ensure the underground safety, the tool is not internally provided with a nut, a slender fastening screw and other components, and the outer shell is connected by threads.
Claims (10)
1. Electronic cutting actuating system of tubular column in pit, its characterized in that: comprises a fastening shell (16), a cutting head rotation system, a cutting head revolution system and a cutting head deflection system; the cutting tool bit autorotation system comprises a main transmission shaft (3), an auxiliary transmission shaft (24), a blade main shaft (31), a blade (38) and a tool bit seat (37), wherein the main transmission shaft (3), the auxiliary transmission shaft (24) and the blade main shaft (31) sequentially form gear transmission, the blade (38) is installed on the tool bit seat (37), and the tool bit seat (37) is installed on the blade main shaft (31); the cutting head revolution system comprises an input shaft (5), a speed reducer, a rotating seat (17) and a rotating shell (21), wherein the input shaft (5) is sleeved outside a main transmission shaft (3) and is fixedly connected with the main transmission shaft (3), the input shaft (5) is sequentially connected with the rotating seat (17) and the rotating shell (21) through the speed reducer, and an auxiliary transmission shaft (24) is arranged below the rotating seat (17) and can rotate relative to the rotating seat (17); the cutting head deflection system comprises a transfer rod (42), a sliding block (25), a screw rod (26) and a cutter clamping piece rotating seat (29), wherein the sliding block (25) and the screw rod (26) form spiral transmission matching, the rotating of the sliding block (25) drives the screw rod (26) to eccentrically move, the cutter clamping piece rotating seat (29) is fixedly connected with the screw rod (26), a blade main shaft (31) is installed on the cutter clamping piece rotating seat (29), and an auxiliary transmission shaft (24), the sliding block (25) and the screw rod (26) are installed in a rotating shell (21).
2. The tubular string electrical cut execution system of claim 1, wherein: the transmission rod is connected in the sliding block (25) and is stretched through a motor connected with the transmission rod, a track matched with the screw rod (26) is arranged outside the sliding block (25), and the tool clamp sheet rotating seat (29) is fixed at the relative position with the screw rod (26) through a fixed key.
3. The tubular string electrical cutting execution system in a well as claimed in claim 1 or 2, characterized in that the reducer is a multi-stage planetary reducer; the input shaft (5) is connected with the first-stage planetary reducer and then sequentially connected with the planetary reducer behind the first-stage planetary reducer, and the last-stage planetary reducer is connected with the rotating seat (17) through a fastening screw (15).
4. The downhole string electrical cutting actuation system of claim 3, wherein the planetary reducer is a four-stage reducer comprising: the planet carrier A (8) with three planet wheels A, the rear end of the planet carrier A (8) is connected with a same planet carrier B (10) with three planet wheels B, the rear end of the planet carrier B (10) is connected with a speed reduction stage planet carrier C (12) with three planet wheels C, the planet carrier C (12) is connected with a speed reduction planet carrier (14) with three speed reduction planet wheels, and the speed reduction planet carrier (14) is connected with a rotating base (17) through a fastening screw (15).
5. The tubular string electrical cut execution system of claim 4, wherein: the reduction ratio of the planetary speed reducer is 1: 100-200.
6. The tubular string electrical cut execution system of claim 1 or 2, wherein: a speed reducer shell (6) is further sleeved on the outer side of the input shaft (5) above the fastening shell (16), and a ball bearing (4) is arranged between the input shaft (5) and the speed reducer shell (6).
7. The tubular string electrical cut execution system of claim 1 or 2, wherein: a rotating head (28) is fixedly connected to the lower portion of the rotating shell (21), grooves are formed in the rotating head (28), and the blade main shaft (31), the tool clamping blade rotating seat (29) and the blades (38) are all installed in the grooves of the rotating head (28).
8. The tubular string electrical cut execution system of claim 1 or 2, wherein: and a driving gear (32) is arranged between the auxiliary transmission shaft (24) and the blade main shaft (31).
9. The tubular string electrical cut execution system of claim 1 or 2, wherein: the rotating seat (17) is connected with the fastening shell (16) through a centering bearing A (18) and a centering bearing B (19); a centering bearing C (22) is arranged between the main transmission shaft (3) and the rotating seat (17), and a centering bearing D (23) is arranged between the rotating seat (17) and the auxiliary transmission shaft (24); a righting bearing is arranged between the blade main shaft (31) and the tool holder blade rotary seat (29).
10. The tubular string electrical cut execution system of claim 1 or 2, wherein: the rotary housing (21) fixes the axial position of the rotary base (17), the rotary housing (21), and the rotary head (28) by means of fastening bolts (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920887826.2U CN211008532U (en) | 2019-06-13 | 2019-06-13 | Electric cutting execution system for underground pipe column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920887826.2U CN211008532U (en) | 2019-06-13 | 2019-06-13 | Electric cutting execution system for underground pipe column |
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| Publication Number | Publication Date |
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| CN211008532U true CN211008532U (en) | 2020-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920887826.2U Active CN211008532U (en) | 2019-06-13 | 2019-06-13 | Electric cutting execution system for underground pipe column |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111997554A (en) * | 2020-09-16 | 2020-11-27 | 中国海洋石油集团有限公司 | Deep well oil casing cutting tool |
| CN112815047A (en) * | 2019-11-17 | 2021-05-18 | 中石化石油工程技术服务有限公司 | Planetary gear reducer for electric cutting of underground pipe column |
| CN113738299A (en) * | 2021-08-18 | 2021-12-03 | 西南石油大学 | Downhole pipe column cutting tool |
-
2019
- 2019-06-13 CN CN201920887826.2U patent/CN211008532U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112815047A (en) * | 2019-11-17 | 2021-05-18 | 中石化石油工程技术服务有限公司 | Planetary gear reducer for electric cutting of underground pipe column |
| CN111997554A (en) * | 2020-09-16 | 2020-11-27 | 中国海洋石油集团有限公司 | Deep well oil casing cutting tool |
| CN113738299A (en) * | 2021-08-18 | 2021-12-03 | 西南石油大学 | Downhole pipe column cutting tool |
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