CN111660254B - Deep well pump coupling dismounting caliper and use method thereof - Google Patents
Deep well pump coupling dismounting caliper and use method thereof Download PDFInfo
- Publication number
- CN111660254B CN111660254B CN202010561557.8A CN202010561557A CN111660254B CN 111660254 B CN111660254 B CN 111660254B CN 202010561557 A CN202010561557 A CN 202010561557A CN 111660254 B CN111660254 B CN 111660254B
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- locking
- top wall
- screw rod
- caliper
- hydraulic cylinder
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- 230000008878 coupling Effects 0.000 title claims abstract description 28
- 238000010168 coupling process Methods 0.000 title claims abstract description 28
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 12
- 210000005056 cell body Anatomy 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000011324 bead Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
- B25B27/026—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same fluid driven
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
The invention provides a deep well pump coupling dismounting caliper and a use method thereof, the deep well pump coupling dismounting caliper comprises a caliper which is arranged on a pipe body and a coupling in a crossing way, the caliper is in a structure of an upper top wall, one side of the upper top wall is provided with a locking device, the other side of the upper top wall is provided with a curved clamping head, the end part of the clamping head is provided with a locking arm, one end of the locking arm is hinged with the clamping head, one end of the locking device is hinged with the upper top wall, the other end of the locking arm is clamped in the other end of the locking device and is locked by a locking screw rod, be equipped with the pneumatic cylinder between the cross calliper afterbody, push through the pneumatic cylinder, the calliper of crossing rotates along body axle center relatively to make the relative rotation on body and the shaft coupling, make shaft coupling and body not hard up, can not appear the broken arm of bent arm and collapse phenomenon such as tooth, compact structure, convenient to use, occupation space is few, is fit for using widely.
Description
Technical Field
The invention relates to the field of coupling disassembly calipers, in particular to a deep well pump coupling disassembly calipers and a using method thereof.
Background
The well surface power device of the deep well pump drives the long shaft to drive the pump impeller to rotate in the diversion shell, and water is lifted through the pump impeller and the water lifting pipe. The long shaft is connected with the shaft coupling through a plurality of short shafts with certain length, and the long shaft is in a high-torque running state as long as the long shaft is started.
In the overhaul of the deep well pump, the long shaft is tightly connected due to the large torque, the soaking corrosion of water and the like. When the stub shaft is disassembled section by section, the stub shaft and the coupling require a large moment disassembly tool. When the large pipe tongs are connected in abnormal fastening, the problems that the handle of the large pipe tongs is sleeved with a steel pipe and the number of people is increased are solved, the phenomena of arm bending, arm breaking, tooth breakage and the like frequently occur, and unsafe factors are increased in the process of disassembly are caused. The currently used large pipe tongs generally rated bear a torque of 1000N.m maximum, and the increase of the sleeve and the manpower clearly increase the safety operation risk.
The invention provides a special kit for disassembling a threaded connecting pipe of a deep-well pump, which comprises a support frame and two clamping frames, wherein the support frame is used for being placed on the ground of a wellhead, the two clamping frames are respectively used for clamping two adjacent sections of threaded connecting pipes, and the clamping frames positioned below are placed on the support frame; the clamping frame comprises a connecting plate and two clamping arms, one ends of the two clamping arms are respectively hinged with the connecting plate, the other ends of the two clamping arms are locked through a detachable connecting piece, each clamping arm comprises a holding rod and a clamping piece with an arc-shaped inner surface, the two clamping pieces are opposite, and friction lines are arranged on the inner surface of the clamping piece. The special external member joint structure of this dismantlement is great, needs the manual work to dismantle, and the occupation of land position is great, can't dismantle in narrow and small position.
Disclosure of Invention
The invention mainly aims to provide a deep well pump coupler dismounting caliper and a using method thereof, which solve the problem that a bent arm is broken and teeth collapse frequently occurs when a coupler is dismounted due to large torque and water soaking corrosion of a long shaft for a long time.
In order to solve the technical problems, the invention adopts the following technical scheme: the deep well pump coupler dismounting caliper comprises calipers which are arranged on a pipe body and the coupler in a crossed mode, wherein the calipers are of an upper top wall, a locking device is arranged on one side of the upper top wall, a bent clamping head is arranged on the other side of the upper top wall, a locking arm is arranged at the end part of the clamping head, one end of the locking arm is hinged with the clamping head, one end of the locking device is hinged with the upper top wall, the other end of the locking arm is clamped inside the other end of the locking device and locked through a locking screw rod, and a hydraulic cylinder is arranged between the tail parts of the crossed calipers;
the crossed calipers are pushed by the hydraulic cylinder to rotate relatively along the axis of the pipe body so as to enable the pipe body and the coupler to rotate relatively.
In the preferred scheme, the chuck inside wall is equipped with first latch, the latch arm is close to the chuck tip and is equipped with the second latch.
In the preferred scheme, the locking device is provided with a locking groove, and the end part of the locking arm is arranged in the locking groove.
In the preferred scheme, the locking arm tip is equipped with the locking hole, locking lead screw passes locking device tip and supports and lean on locking hole one side.
In the preferred scheme, the end part of the locking screw rod is provided with a fixing head, and the fixing head is in a sphere shape or a cylinder shape.
In the preferred scheme, the fixed head is clamped inside the locking hole.
In the preferred scheme, the tail part of the upper top wall is provided with a top seat, the top seat is hinged with the upper top wall, the hydraulic cylinder is arranged on the top seat, and the movable end of the hydraulic cylinder is propped against the tail part of the lower top wall of the lower caliper.
In the preferred scheme, the lower roof afterbody is equipped with the cell body, and cell body both ends are equipped with the circular bead, the pneumatic cylinder expansion end is equipped with the lead screw seat, is equipped with on the lead screw seat and is equipped with the circular arc groove at both ends from top to bottom, is equipped with the locating piece between two circular arc grooves, and the locating piece card is inside the cell body, the circular arc groove card is on the circular bead.
In the preferred scheme, the movable end of the hydraulic cylinder is provided with an adjusting screw rod, the adjusting screw rod is rotationally connected with the end part of the hydraulic cylinder, the adjusting screw rod is in threaded connection with a screw rod seat, and the adjusting screw rod penetrates through the groove body.
The method comprises the following steps:
s1, clamping an upper top wall on a pipe body through a clamp, and clamping the end part of a locking arm in a locking device and locking the locking arm through a locking screw rod;
s2, locking the lower top wall and the step S1 on the coupler;
s3, installing a hydraulic cylinder on the top wall of the upper top seat, installing a rotating adjusting screw rod at the movable end of the hydraulic cylinder, and installing a screw rod seat on the adjusting screw rod;
s4, the adjusting screw rod is clamped in the groove body, the adjusting screw rod is rotated to enable the arc groove of the screw rod seat to be clamped on the round convex head at the tail part of the lower top wall, and the positioning block is clamped in the groove body;
s5, starting a hydraulic device, and enabling the hydraulic cylinder to push the lower top wall and the upper top wall to relatively rotate so as to loosen the coupler and the pipe body;
s6, detaching the coupler and the pipe body through the large pipe tongs.
The invention provides a deep well pump coupler dismounting caliper and a use method thereof, wherein an upper top wall, a locking arm and a locking device are assembled into a caliper, the calipers assembled on the upper top wall and the lower top wall of a coupler are assembled on a pipe body clamp, the upper calipers and the lower calipers are arranged on the pipe body and the coupler in a crossed manner, the ends of the lower top wall and the upper top wall are pushed by a hydraulic cylinder, so that the crossed calipers rotate relatively along the axis of the pipe body to enable the pipe body and the coupler to rotate relatively, the coupler and the pipe body are loosened, the phenomena of arm breakage, tooth breakage and the like of a bent arm are avoided, and the deep well pump coupler dismounting caliper is compact in structure, convenient to use, small in occupied space and suitable for popularization and use.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a general block diagram of the present invention;
FIG. 2 is a block diagram of a pipe body and coupling of the present invention;
FIG. 3 is a block diagram of the present invention with the caliper clamped to the tube and coupling;
FIG. 4 is a view showing the structure of the lower top wall of the present invention clamped on the coupling;
FIG. 5 is a block diagram of the upper top wall of the present invention clamped to a tube;
FIG. 6 is an expanded top wall structure of the present invention;
FIG. 7 is a top wall chucking configuration of the present invention;
FIG. 8 is a top wall locking structure of the present invention;
FIG. 9 is a diagram of the lower top wall tail portion of the hydraulic cylinder of the present invention;
in the figure: a lower top wall 1; a tank body 101; a rounded nose 102; an upper top wall 2; a chuck 201; a first latch 202; a hydraulic cylinder 3; a screw rod seat 4; circular arc groove 401; a positioning block 402; an adjusting screw rod 5; a top base 6; a lock arm 7; a locking hole 701; a second latch 702; a locking device 8; a locking groove 801; locking the screw rod 9; a stationary head 901; a coupling 10; a tube 11.
Detailed Description
Example 1
As shown in fig. 1-9, a deep well pump coupler dismounting caliper and a using method thereof, comprising calipers which are arranged on a pipe body 11 and a coupler 10 in a crossing way, wherein the calipers are of an upper top wall 2, a locking device 8 is arranged on one side of the upper top wall 2, a curved clamping head 201 is arranged on the other side of the upper top wall 2, a locking arm 7 is arranged at the end part of the clamping head 201, one end of the locking arm 7 is hinged with the clamping head 201, one end of the locking device 8 is hinged with the upper top wall 2, the other end of the locking arm 7 is clamped inside the other end of the locking device 8 and is locked by a locking screw rod 9, a hydraulic cylinder 3 is arranged between the tail parts of the crossed calipers, the crossed calipers are pushed by the hydraulic cylinder 3, and the crossed calipers relatively rotate along the axis of the pipe body 11 so as to relatively rotate on the pipe body 11 and the coupler 10. From this structure, upper and lower calliper structure is similar, only upper roof 2 and lower roof 1 afterbody installation pneumatic cylinder 3 position are different, will go up roof 2, locking arm 7 and locking device 8 equipment become a calliper, the calliper of roof 1 equipment about the shaft coupling card, the calliper of roof 2 equipment about the body 11 card, upper and lower calliper cross arrangement is on body 11 and shaft coupling 10, lower roof 1 and upper roof 2 tip pushes away through pneumatic cylinder 3, make the calliper of crossing rotate relatively along body 11 axle center, so that the relative rotation on body 11 and the shaft coupling 10, make shaft coupling 10 and body 11 become flexible, the broken arm phenomenon such as tooth of breaking of curved arm can not appear, compact structure, and convenient to use, occupation space is few, is fit for using widely.
The currently used large pipe tongs generally rated bear a maximum moment of about 1000N.m, and the increase of the sleeve and the manpower clearly increase the safety operation risk. The shaft caliper can achieve a moment which is two times or three times or higher than that of the pipe tongs, thereby reducing manpower and simultaneously reducing operation risks. The relative rotation angle of the upper caliper and the lower caliper is 30 degrees. The arm length is designed to be 200 mm, and an external force is applied by a hydraulic jack of not more than 3 tons, so that a moment of about 5000 N.m. can be generated. The caliper for the shaft is only suitable for unscrewing or screwing in the right-hand direction, wherein the shaft diameter is 60mm, and the outer diameter of the coupler is 84 mm.
In a preferred embodiment, the inner side wall of the chuck 201 is provided with a first latch 202, and the end of the lock arm 7 close to the chuck 201 is provided with a second latch 702. With this structure, the first latch 202 and the second latch 702 increase friction force with the pipe body 11 and the coupling 10, so that the locking structure is more stable.
In a preferred embodiment, the locking device 8 is provided with a locking groove 801, and the end of the locking arm 7 is arranged inside the locking groove 801. From this structure, as shown in fig. 6-7, locking arm 7 tip card is inside locking groove 801, and simple structure, chucking is more stable, can not appear the skew condition.
In a preferred embodiment, the end of the locking arm 7 is provided with a locking hole 701, and the locking screw 9 passes through the end of the locking device 8 and abuts against one side of the locking hole 701. With this structure, after the end of the locking arm 7 is clamped in the locking groove 801, the locking screw rod 9 passes through the end of the locking device 8 to abut against one side of the locking hole 701, and the locking arm 7 is locked on the pipe body 11 or the coupling 10.
In the preferred scheme, the end of the locking screw rod 9 is provided with a fixing head 901, and the fixing head 901 is in a sphere shape or a cylinder shape. With this configuration, as shown in fig. 8, the fixing head 901 is preferably spherical.
In a preferred embodiment, the stationary head 901 is snapped into place within the locking aperture 701. With this structure, as shown in fig. 7 to 8, the fixing head 901 is caught in the locking hole 701 to prevent the sliding, for fixing the locking arm 7.
In the preferred scheme, the afterbody of last roof 2 is equipped with footstock 6, and footstock 6 is articulated with last roof 2, pneumatic cylinder 3 is established on footstock 6, and pneumatic cylinder 3 loose end supports and leans on the roof 1 afterbody under the lower calliper. With this structure, the hydraulic cylinder 3 can be rotated by the top base 6, and the equipment can be smoothly disassembled by the freedom of movement.
In the preferred scheme, the afterbody of roof 1 is equipped with cell body 101 down, and cell body 101 both ends are equipped with the circular bead 102, the 3 loose ends of pneumatic cylinder are equipped with lead screw seat 4, are equipped with on the lead screw seat 4 and are equipped with circular arc groove 401 from top to bottom, are equipped with locating piece 402 between two circular arc grooves 401, and locating piece 402 card is inside cell body 101, circular arc groove 401 card is on circular bead 102. With this structure, as shown in fig. 9, the circular arc groove 401 on the screw seat 4 is clamped on the circular boss 102, and the positioning block 402 is clamped in the groove body 101 to perform positioning and movable connection functions, but when the lower top wall 1 rotates, the circular arc groove 401 and the circular boss 102 function to prevent the screw seat 4 from sliding.
In the preferred scheme, the movable end of the hydraulic cylinder 3 is provided with an adjusting screw 5, the adjusting screw 5 is rotationally connected with the end part of the hydraulic cylinder 3, the adjusting screw 5 is in threaded connection with a screw seat 4, and the adjusting screw 5 penetrates through the groove body 101. With the structure, the adjusting screw rod 5 is used for adjusting the screw rod seat 4 to be at the position, so that the screw rod seat 4 can be clamped at the tail part of the lower top wall 1 conveniently.
Example 2
As further described in connection with embodiment 1, as shown in fig. 1 to 9, the upper top wall 2 is clamped on the pipe body 11, and the end of the locking arm 7 is clamped inside the locking device 8 and locked by the locking screw rod 9.
The lower top wall 1 is locked on the coupler 10 in the step S1.
The upper top wall 2 is provided with a hydraulic cylinder 3 at a top seat 6, a rotating adjusting screw rod 5 is arranged at the movable end of the hydraulic cylinder 3, and a screw rod seat 4 is arranged on the adjusting screw rod 5.
The adjusting screw rod 5 is clamped inside the groove body 101, the arc groove 401 of the screw rod seat 4 is clamped on the round raised head 102 at the tail part of the lower top wall 1 by rotating the adjusting screw rod 5, and the positioning block 402 is clamped inside the groove body 101.
The hydraulic device is started, and the hydraulic cylinder 3 pushes the lower top wall 1 and the upper top wall 2 to rotate relatively so that the coupler 10 and the pipe body 11 loosen.
And then the coupling 10 and the pipe body 11 are detached through the large pipe tongs.
The above embodiments are only preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the scope of the present invention should be defined by the claims, including the equivalents of the technical features in the claims. I.e., equivalent replacement modifications within the scope of this invention are also within the scope of the invention.
Claims (6)
1. A deep well pump shaft coupling dismantles calliper, characterized by: the novel pipe clamp comprises calipers which are arranged on a pipe body (11) and a coupler (10) in a crossed mode, wherein the calipers are of an upper top wall (2), a locking device (8) is arranged on one side of the upper top wall (2), a bent clamping head (201) is arranged on the other side of the upper top wall, a locking arm (7) is arranged at the end of the clamping head (201), one end of the locking arm (7) is hinged with the clamping head (201), one end of the locking device (8) is hinged with the upper top wall (2), the other end of the locking arm (7) is clamped inside the other end of the locking device (8) and is locked through a locking screw rod (9), and a hydraulic cylinder (3) is arranged between the tail parts of the crossed calipers;
pushing by a hydraulic cylinder (3), and relatively rotating the crossed calipers along the axle center of the pipe body (11) so as to relatively rotate the pipe body (11) and the coupler (10);
the tail part of the upper top wall (2) is provided with a top seat (6), the top seat (6) is hinged with the upper top wall (2), the hydraulic cylinder (3) is arranged on the top seat (6), and the movable end of the hydraulic cylinder (3) is abutted against the tail part of the lower top wall (1) of the lower caliper;
the tail part of the lower top wall (1) is provided with a groove body (101), two ends of the groove body (101) are provided with round raised heads (102), the movable end of the hydraulic cylinder (3) is provided with a screw rod seat (4), the screw rod seat (4) is provided with an arc groove (401) at the upper end and the lower end, a positioning block (402) is arranged between the two arc grooves (401), the positioning block (402) is clamped inside the groove body (101), and the arc groove (401) is clamped on the round raised heads (102);
the inner side wall of the clamping head (201) is provided with a first clamping tooth (202), and the end part of the locking arm (7) close to the clamping head (201) is provided with a second clamping tooth (702);
the locking device (8) is provided with a locking groove (801), and the end part of the locking arm (7) is arranged in the locking groove (801).
2. The deep-well pump coupling disassembly caliper of claim 1, wherein: the end part of the locking arm (7) is provided with a locking hole (701), and the locking screw rod (9) passes through the end part of the locking device (8) to be abutted against one side of the locking hole (701).
3. The deep-well pump coupling disassembly caliper of claim 2, wherein: the end part of the locking screw rod (9) is provided with a fixing head (901), and the fixing head (901) is in a sphere shape or a cylinder shape.
4. A deep well pump coupling removal caliper as defined in claim 3, wherein: the fixing head (901) is clamped inside the locking hole (701).
5. The deep-well pump coupling disassembly caliper of claim 1, wherein: the movable end of the hydraulic cylinder (3) is provided with an adjusting screw rod (5), the adjusting screw rod (5) is rotationally connected with the end part of the hydraulic cylinder (3), the adjusting screw rod (5) is in threaded connection with the screw rod seat (4), and the adjusting screw rod (5) penetrates through the groove body (101).
6. The method for using the deep-well pump coupling disassembly caliper according to any one of claims 1-5, wherein the method comprises the following steps:
the method comprises the following steps:
s1, clamping an upper top wall (2) on a pipe body (11), and clamping the end part of a locking arm (7) inside a locking device (8) and locking the locking arm through a locking screw rod (9);
s2, locking the lower top wall (1) and the step S1 on the coupler (10);
s3, the upper top wall (2) is provided with a hydraulic cylinder (3) at a top seat (6), a rotating adjusting screw rod (5) is arranged at the movable end of the hydraulic cylinder (3), and a screw rod seat (4) is arranged on the adjusting screw rod (5);
s4, the adjusting screw rod (5) is clamped inside the groove body (101), the adjusting screw rod (5) is rotated to enable the arc groove (401) of the screw rod seat (4) to be clamped on the round convex head (102) at the tail part of the lower top wall (1), and the positioning block (402) is clamped inside the groove body (101);
s5, starting a hydraulic device, wherein the hydraulic cylinder (3) pushes the lower top wall (1) and the upper top wall (2) to rotate relatively so as to loosen the coupler (10) and the pipe body (11);
s6, detaching the coupler (10) and the pipe body (11) through the large pipe tongs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010561557.8A CN111660254B (en) | 2020-06-18 | 2020-06-18 | Deep well pump coupling dismounting caliper and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010561557.8A CN111660254B (en) | 2020-06-18 | 2020-06-18 | Deep well pump coupling dismounting caliper and use method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111660254A CN111660254A (en) | 2020-09-15 |
| CN111660254B true CN111660254B (en) | 2023-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010561557.8A Active CN111660254B (en) | 2020-06-18 | 2020-06-18 | Deep well pump coupling dismounting caliper and use method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN111660254B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9525837D0 (en) * | 1994-12-21 | 1996-02-21 | Daewoo Heavy Ind Co Ltd | Caliper assembly for a disc brake |
| CN202239318U (en) * | 2011-10-25 | 2012-05-30 | 浙江正同管业有限公司 | Hydraulic calipers for rapid self-locking of metal pipe fitting |
| CN203239264U (en) * | 2013-03-08 | 2013-10-16 | 中国石油天然气股份有限公司 | Self-locking type blowout prevention box support clamp |
| CN207746763U (en) * | 2017-12-22 | 2018-08-21 | 宣城市建林机械有限公司 | Process the frock clamp of single cylinder clamp |
| CN209687433U (en) * | 2019-01-31 | 2019-11-26 | 宝鸡石油机械有限责任公司 | Scissors V shape tubing string clamp |
| CN110842528A (en) * | 2019-12-13 | 2020-02-28 | 国家电网有限公司 | Special external member is dismantled to deep-well pump threaded connection pipe |
| CN212287466U (en) * | 2020-06-18 | 2021-01-05 | 湖北清江水电开发有限责任公司 | Deep well pump coupling dismantles calliper |
-
2020
- 2020-06-18 CN CN202010561557.8A patent/CN111660254B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9525837D0 (en) * | 1994-12-21 | 1996-02-21 | Daewoo Heavy Ind Co Ltd | Caliper assembly for a disc brake |
| CN202239318U (en) * | 2011-10-25 | 2012-05-30 | 浙江正同管业有限公司 | Hydraulic calipers for rapid self-locking of metal pipe fitting |
| CN203239264U (en) * | 2013-03-08 | 2013-10-16 | 中国石油天然气股份有限公司 | Self-locking type blowout prevention box support clamp |
| CN207746763U (en) * | 2017-12-22 | 2018-08-21 | 宣城市建林机械有限公司 | Process the frock clamp of single cylinder clamp |
| CN209687433U (en) * | 2019-01-31 | 2019-11-26 | 宝鸡石油机械有限责任公司 | Scissors V shape tubing string clamp |
| CN110842528A (en) * | 2019-12-13 | 2020-02-28 | 国家电网有限公司 | Special external member is dismantled to deep-well pump threaded connection pipe |
| CN212287466U (en) * | 2020-06-18 | 2021-01-05 | 湖北清江水电开发有限责任公司 | Deep well pump coupling dismantles calliper |
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| CN111660254A (en) | 2020-09-15 |
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