CN111720080A - Hydraulic back-up tong of casing power tong - Google Patents
Hydraulic back-up tong of casing power tong Download PDFInfo
- Publication number
- CN111720080A CN111720080A CN202010513712.9A CN202010513712A CN111720080A CN 111720080 A CN111720080 A CN 111720080A CN 202010513712 A CN202010513712 A CN 202010513712A CN 111720080 A CN111720080 A CN 111720080A
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- tong
- plate
- hydraulic
- hole
- bottom plate
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- 239000010720 hydraulic oil Substances 0.000 claims abstract description 20
- 239000003921 oil Substances 0.000 claims abstract description 13
- 230000008878 coupling Effects 0.000 description 9
- 238000010168 coupling process Methods 0.000 description 9
- 238000005859 coupling reaction Methods 0.000 description 9
- 238000013461 design Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
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Classifications
-
- 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
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/16—Connecting or disconnecting pipe couplings or joints
- E21B19/161—Connecting or disconnecting pipe couplings or joints using a wrench or a spinner adapted to engage a circular section of pipe
- E21B19/163—Connecting or disconnecting pipe couplings or joints using a wrench or a spinner adapted to engage a circular section of pipe piston-cylinder actuated
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Clamps And Clips (AREA)
Abstract
The invention belongs to the technical field of oil pipe tongs, and particularly relates to a hydraulic back tong of a casing power tong, which comprises a bottom plate and an upper plate which have the same structure, wherein two symmetrical clamping arms are connected between the bottom plate and the upper plate, a torsion spring shaft is connected between the bottom plate and the upper plate, the torsion spring shaft is provided with a torsion spring corresponding to the clamping arms, the clamping arms are connected with bolts, the bolts are connected with bearings, the right sides of the clamping arms are connected with roller shafts, the roller shafts are connected with rollers, the left ends of the clamping arms are connected with a front tooth holder of the back tong, a back tooth holder is connected between the bottom plate and the upper plate, the front tooth holder of the back tong and the back tooth holder of the back tong are both connected with tong teeth, the tong teeth are connected with elastic pins, the back tooth holder of the back tong is connected with a back tooth holder support, a lower backing plate is arranged on the upper side of the bottom plate, a wedge block is arranged on the lower, the first roller shaft is movably connected with a connecting block, the connecting block is connected with a hydraulic oil cylinder, and the hydraulic oil cylinder is connected with an oil cylinder supporting seat.
Description
Technical Field
The invention belongs to the technical field of oil pipe tongs, and particularly relates to a hydraulic back-up tong of a casing power tong.
Background
In the screwing-in and unscrewing of the threads of an oil pipe, a sleeve and a drill rod at an oil field wellhead, a power clamp for a pipe is generally used for facilitating the disassembly and assembly of the threaded connection of the oil pipe and the drill rod and having good stability, the power clamp comprises a main clamp and a back clamp, the main clamp plays roles in clamping, screwing and disassembling the pipe, and the back clamp plays roles in clamping and stabilizing a connecting pipe. The traditional power tong back-up tong for the oilfield pipe is used for clamping: four inner curved surface slope plates are arranged in a cavity contained by the back-up tong main body and the back-up tong head cover plate, rollers are arranged on the jaw plates, the jaw plates are arranged in square holes of the jaw plate frames, and when the jaw plate frames rotate for a certain angle relative to the back-up tong main body, the rollers roll along the inner curved surfaces of the slope plates to climb, so that the radial translation of the jaw plates is formed, the tong teeth clamp the connecting pipe, the fixing of the connecting pipe is realized, and the detachment and buckling of threads between the detaching pipe and the connecting pipe clamped by the main tong are ensured. The structural clamping form of the back-up tong has the limitations that each group of clamping parts can only clamp a specific pipe diameter, a corresponding group of clamping parts must be arranged when clamping other pipe diameters, and the structure is sensitive to deviation of the pipe diameters, so that the defects displayed in the manufacturing and using processes are obvious. In order to solve the problems, people adopt a structural form that a pteriform jaw plate is driven to rotate to clamp the pipe column by meshing a gear ring and a planet gear in practice, so that the pipe column is fixed. However, although the structure can clamp any pipe column, the structure is complex, the number of related parts is large, and particularly, the existence of the gear meshing pair not only increases the requirement on processing precision and the manufacturing difficulty, but also iron chips or other hard impurities are easy to clamp in the gear meshing pair, so that the gear meshing pair is easy to be blocked; in the above structure, the power is transmitted to the jaw by the gear train or the transmission component to clamp the oil pipe, so that the energy is greatly lost, and the parts are easy to damage.
Disclosure of Invention
In view of the problems raised by the above background art, the present invention is directed to: aims to provide a hydraulic back-up tong of a casing power tong. In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:
the hydraulic back-up tong of the casing pipe power tong comprises a bottom plate and an upper plate which have the same structure, wherein a side vertical plate and a front vertical plate are connected between the bottom plate and the upper plate, two symmetrical clamping arms are connected between the bottom plate and the upper plate, a torsion spring shaft is connected between the bottom plate and the upper plate, the torsion spring shaft is provided with a torsion spring corresponding to the clamping arms, the clamping arms are connected with bolts, the bolts are connected with bearings, the bearings are fixedly connected with the clamping arms, the right sides of the clamping arms are connected with roller shafts, the roller shafts are connected with rollers, the left ends of the clamping arms are connected with a back-up tong front tooth seat, a back-up tong rear tooth seat is connected between the bottom plate and the upper plate, the back-up tong front tooth seat and the back-up tong rear tooth seat are both connected with tong teeth, the tong teeth are connected with elastic pins, the back-up tong rear tooth seat is connected with a back-up, the lower side of the upper plate is provided with an upper base plate corresponding to the lower base plate, a wedge block is arranged between the lower base plate and the upper base plate, the outer side of the wedge block is matched with the roller, the wedge block is connected with a guide key, the lower base plate is provided with a guide groove matched with the guide key, the wedge block is connected with a first roller shaft, the first roller shaft is movably connected with a coupling block, the coupling block is connected with a hydraulic oil cylinder, and the hydraulic oil cylinder is connected with an oil cylinder supporting seat.
As a preferable scheme of the invention, the clamping arm is provided with a first through hole, the front tooth holder of the back-up tong is provided with a first through hole matched with the first through hole, and the first through hole are internally connected with a positioning pin which is connected with a cotter pin.
As a preferred scheme of the invention, the back-up tong back tooth seat support is provided with a second through hole, the back-up tong back tooth seat is provided with a second through hole matched with the second through hole, a back-up tong back tooth seat pin shaft is connected in the second through hole and the second through hole, and the back-up tong back tooth seat pin shaft is connected with a cotter pin.
In a preferred embodiment of the present invention, the bearing is connected with a bearing retainer ring.
In a preferred embodiment of the present invention, two first set screws are connected to the roller shaft, and two second set screws are connected to the first roller shaft.
As a preferable scheme of the invention, the hydraulic oil cylinder is in threaded connection with the coupling block, and a locking nut is arranged between the hydraulic oil cylinder and the coupling block.
As a preferable scheme of the invention, the guide key is a strip-shaped guide key, and two ends of the guide key are in a semi-arc structure.
As a preferable scheme of the invention, a limiting column is connected between the bottom plate and the upper plate, and the wedge block is provided with a limiting groove matched with the limiting column.
The invention has the beneficial effects that:
1. the invention does not adopt any gear, thus the manufacture is relatively simple;
2. the invention directly acts the acting force of the hydraulic oil cylinder on the clamped oil pipe, under the matching of the bolt and the bearing, the clamping arm is driven to rotate by the roller, so that the acting force output by the hydraulic oil cylinder acts on the clamped pipe column through the clamping arm, and under the matching of the front tooth seats of the two back-up tongs and the rear tooth seat of one back-up tong, the purpose of three-point clamping is realized, and the clamping stability is good;
3. according to the invention, under the matching of the torsion spring shaft and the torsion spring, the clamping arm can be better loosened when being loosened;
4. according to the invention, the elastic pin is connected to the rear side of the jaw, so that certain buffering is realized during clamping, and the clamping effect is better.
5. The invention has the advantages of reasonable design, simple principle, compact structure, convenient manufacture, good clamping stability and long service life.
Drawings
The invention is further illustrated by the non-limiting examples given in the accompanying drawings;
FIG. 1 is a schematic longitudinal sectional view of a hydraulic back-up tong embodiment of a casing power tong according to the present invention;
FIG. 2 is a cross-sectional view of a transverse portion of a hydraulic back-up tong of an embodiment of the casing power tong of the present invention;
FIG. 3 is a schematic structural diagram of a base plate in an embodiment of a hydraulic back-up tong of a casing power tong according to the present invention;
FIG. 4 is a schematic structural view of a clamp arm in an embodiment of a hydraulic back-up tong of a casing power tong according to the present invention;
FIG. 5 is a schematic cross-sectional view of a clamping arm in an embodiment of a hydraulic back-up tong of a casing power tong according to the present invention;
FIG. 6 is a schematic structural view of a back-up tong front tooth holder in the hydraulic back-up tong embodiment of the casing power tong of the present invention;
FIG. 7 is a schematic cross-sectional view of a front tooth holder of a back-up tong in an embodiment of a hydraulic back-up tong of a casing power tong according to the present invention;
FIG. 8 is a schematic structural view of a back-up tong rear tooth holder in an embodiment of a hydraulic back-up tong of the casing power tong of the invention;
FIG. 9 is a schematic cross-sectional view of a back-up tong in an embodiment of the hydraulic back-up tong of the casing power tong of the present invention;
FIG. 10 is a schematic top view of a back-up tong support in an embodiment of the hydraulic back-up tong of the casing power tong of the present invention;
FIG. 11 is a schematic cross-sectional view of a back-up tong support in an embodiment of the hydraulic back-up tong of the casing power tong of the present invention;
FIG. 12 is a schematic structural view of a lower backing plate in an embodiment of a hydraulic back-up tong of a casing power tong according to the present invention;
FIG. 13 is a schematic structural view of a wedge in an embodiment of a hydraulic back-up tong of a casing power tong according to the present invention;
FIG. 14 is a schematic cross-sectional view of a wedge block in an embodiment of a hydraulic back-up tong of a casing power tong according to the present invention;
the main element symbols are as follows:
the back-up tong comprises a bottom plate 1A, an upper plate 1B, a side vertical plate 21, a front vertical plate 22, a clamping arm 3, a torsion spring shaft 3A, a torsion spring 3B, a bolt 31, a bearing 32, a bearing retainer 321, a roller shaft 33, a first set screw 331, a roller 34, a first through hole 35, a back-up tong front tooth seat 4A, a back-up tong back tooth seat 4B, a tong tooth 41, an elastic pin 42, a first through hole 43, a positioning pin 44, an opening pin 45, a second through hole 46, a back-up tong back tooth seat pin shaft 47, a back-up tong back tooth seat support 5, a second through hole 51, a lower cushion plate 6A, an upper cushion plate 6B, a guide groove 61, a wedge block 7, a first roller shaft 71, a second set screw 711, a connecting block 72, a limiting groove 73, a guide key 74, a hydraulic oil cylinder 8, an oil cylinder support seat 81, a locking.
Detailed Description
In order that those skilled in the art can better understand the present invention, the following technical solutions are further described with reference to the accompanying drawings and examples.
As shown in fig. 1 to 14, the hydraulic back-up tong of the casing pipe power tong of the invention comprises a bottom plate 1A and an upper plate 1B which have the same structure, a side vertical plate 21 and a front vertical plate 22 are connected between the bottom plate 1A and the upper plate 1B, two symmetrical clamping arms 3 are connected between the bottom plate 1A and the upper plate 1B, a torsion spring shaft 3A is connected between the bottom plate 1A and the upper plate 1B, the torsion spring shaft 3A is provided with a torsion spring 3B corresponding to the clamping arm 3, the clamping arm 3 is connected with a bolt 31, the bolt 31 is connected with a bearing 32, the bearing 32 is fixedly connected with the clamping arm 3, the right side of the clamping arm 3 is connected with a roller shaft 33, the roller shaft 33 is connected with a roller 34, the left end of the clamping arm 3 is connected with a back-tong front tooth seat 4A, the back-tong rear tooth seat 4B is connected between the bottom plate 1A and the upper plate 1B, the back-tong front tooth seat 4A and the back-tong rear tooth seat, the back-up tong back tooth seat 4B is connected with a back-up tong back tooth seat support 5, a lower cushion plate 6A is installed on the upper side of the bottom plate 1A, an upper cushion plate 6B corresponding to the lower cushion plate 6A is installed on the lower side of the upper plate 1B, a wedge 7 is installed between the lower cushion plate 6A and the upper cushion plate 6B, the outer side of the wedge 7 is matched with the roller 34, the wedge 7 is connected with a guide key 74, the lower cushion plate 6A is provided with a guide groove 61 matched with the guide key 74, the wedge 7 is connected with a first roller shaft 71, the first roller shaft 71 is movably connected with a coupling block 72, the coupling block 72 is connected with a hydraulic oil cylinder 8, and the hydraulic oil cylinder.
In the embodiment, when the hydraulic back-up tong of the casing power tong is used, the hydraulic oil cylinder 8 is controlled to move, when the output end of the hydraulic oil cylinder 8 moves leftwards, the hydraulic oil cylinder 8 drives the wedge block 7 to move leftwards, the roller 34 is pushed outwards by the outer side of the wedge block 7, so that the right end of the clamping arm 3 is driven to move outwards, and under the combined action of the bolt 31 and the bearing 32, the left end of the clamping arm 3 moves inwards, so that the front tooth seat 4A of the back-up tong is driven to move inwards, so that an oil pipe is clamped; on the contrary, when the output end of the hydraulic oil cylinder 8 moves rightwards, the hydraulic oil cylinder 8 drives the wedge block 7 to move rightwards, the right end of the clamping arm 3 moves inwards under the action of the torsion spring 3B, and under the combined action of the bolt 31 and the bearing 32, the left end of the clamping arm 3 moves outwards, so that the front tooth holder 4A of the back-up tong is driven to move outwards, and the oil pipe is loosened.
Wherein, centre gripping arm 3 is equipped with first through-hole 35, and the front tooth seat 4A of back-up tong is equipped with the first via hole 43 with first through-hole 35 assorted, and first through-hole 35 and first via hole 43 in-connection have a locating pin 44, and locating pin 44 is connected with cotter 45. Due to the design, the clamping arm 3 and the back-up tong front tooth holder 4A can be connected stably and well, and the two clamping arms can be installed in a matched mode relatively, simply and quickly.
Wherein, back-up tong back toothholder support 5 is equipped with second through-hole 51, back-up tong back toothholder 4B be equipped with second through-hole 51 assorted second through-hole 46, second through-hole 51 and second through-hole 46 in-connection have back-up tong back toothholder round pin axle 47, back-up tong back toothholder round pin axle 47 is connected with cotter pin 45. Due to the design, the connection between the back-up tong seat support 5 and the back-up tong seat 4B is stable and good, and the back-up tong seat support and the back-up tong seat 4B can be installed in a matched mode relatively, simply and quickly.
Wherein the bearing 32 is connected with a bearing retainer 321. Like the design, the bearing 32 can be protected by a bearing retainer 321.
Two first set screws 331 are connected to the roller shaft 33, and two second set screws 711 are connected to the first roller shaft 71. In this design, the roller shaft 33 may be fixed by the first set screw 331 and the first roller shaft 71 may be fixed by the second set screw 711, so that the roller shaft 33 and the first roller shaft 71 may not be displaced or rotated.
Wherein, the hydraulic cylinder 8 is connected with the coupling block 72 by screw thread, and a locking nut 82 is arranged between the hydraulic cylinder 8 and the coupling block 72. The design of appearance can make hydraulic cylinder 8 more convenient when the installation, and hydraulic cylinder 8 is good with the connection steadiness of coupling block 72.
Wherein, the guiding key 74 is a bar-shaped guiding key, and both ends are semi-arc structures. By the design, the guide key 74 can have good guide effect during guiding, and the situation of deviation is reduced.
Wherein, be connected with spacing post 9 between bottom plate 1A and the upper plate 1B, voussoir 7 is equipped with the spacing groove 73 with spacing post assorted. The design of appearance can make spacing post 9 spacing wedge 7, can prevent that wedge 7 from returning too much.
The foregoing embodiments are merely illustrative of the principles of the present invention and its efficacy, and are not to be construed as limiting the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (8)
1. The hydraulic back-up tong of the casing power tong is characterized in that: the clamp comprises a bottom plate (1A) and an upper plate (1B) which are identical in structure, a side vertical plate (21) and a front vertical plate (22) are connected between the bottom plate (1A) and the upper plate (1B), two symmetrical clamping arms (3) are connected between the bottom plate (1A) and the upper plate (1B), a torsion spring shaft (3A) is connected between the bottom plate (1A) and the upper plate (1B), the torsion spring shaft (3A) is provided with a torsion spring (3B) corresponding to the clamping arms (3), the clamping arms (3) are connected with bolts (31), the bolts (31) are connected with bearings (32), the bearings (32) are fixedly connected with the clamping arms (3), the right sides of the clamping arms (3) are connected with roller shafts (33), the roller shafts (33) are connected with rollers (34), the left ends of the clamping arms (3) are connected with front tooth holders (4A) of back tongs, a back-up tong rear tooth seat (4B) is connected between the bottom plate (1A) and the upper plate (1B), back-up tong front tooth seats (4A) and back-up tong rear tooth seats (4B) are both connected with tong teeth (41), the tong teeth (41) are connected with elastic pins (42), the back-up tong rear tooth seats (4B) are connected with a back-up tong rear tooth seat support (5), a lower cushion plate (6A) is installed on the upper side of the bottom plate (1A), an upper cushion plate (6B) corresponding to the lower cushion plate (6A) is installed on the lower side of the upper plate (1B), wedge blocks (7) are installed between the lower cushion plate (6A) and the upper cushion plate (6B), the outer sides of the wedge blocks (7) are matched with rollers (34), the wedge blocks (7) are connected with guide keys (74), the lower cushion plate (6A) is provided with guide grooves (61) matched with the guide keys (74), and the wedge blocks (7) are connected with a first roller shaft (71), the first roller shaft (71) is movably connected with a connecting block (72), the connecting block (72) is connected with a hydraulic oil cylinder (8), and the hydraulic oil cylinder (8) is connected with an oil cylinder supporting seat (81).
2. The casing power tong hydraulic back-up tong of claim 1, characterized in that: the back-up tong is characterized in that the clamping arm (3) is provided with a first through hole (35), the front tooth holder (4A) of the back-up tong is provided with a first through hole (43) matched with the first through hole (35), a positioning pin (44) is connected in the first through hole (35) and the first through hole (43), and the positioning pin (44) is connected with a split pin (45).
3. The casing power tong hydraulic back-up tong of claim 1, characterized in that: the back-up tong is characterized in that a second through hole (51) is formed in the back-up tong support (5), a second through hole (46) matched with the second through hole (51) is formed in the back-up tong (4B), a back-up tong pin shaft (47) is connected in the second through hole (51) and the second through hole (46), and a split pin (45) is connected to the back-up tong pin shaft (47).
4. The casing power tong hydraulic back-up tong of claim 1, characterized in that: the bearing (32) is connected with a bearing retainer ring (321).
5. The casing power tong hydraulic back-up tong of claim 1, characterized in that: the roller shaft (33) is connected with two first set screws (331), and the first roller shaft (71) is connected with two second set screws (711).
6. The casing power tong hydraulic back-up tong of claim 1, characterized in that: the hydraulic oil cylinder (8) is in threaded connection with the connecting block (72), and a locking nut (82) is arranged between the hydraulic oil cylinder (8) and the connecting block (72).
7. The casing power tong hydraulic back-up tong of claim 1, characterized in that: the guide key (74) is a strip-shaped guide key, and two ends of the guide key are of semi-arc structures.
8. The casing power tong hydraulic back-up tong of claim 1, characterized in that: a limiting column (9) is connected between the bottom plate (1A) and the upper plate (1B), and a limiting groove (73) matched with the limiting column is formed in the wedge block (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010513712.9A CN111720080A (en) | 2020-06-08 | 2020-06-08 | Hydraulic back-up tong of casing power tong |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010513712.9A CN111720080A (en) | 2020-06-08 | 2020-06-08 | Hydraulic back-up tong of casing power tong |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111720080A true CN111720080A (en) | 2020-09-29 |
Family
ID=72566600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010513712.9A Withdrawn CN111720080A (en) | 2020-06-08 | 2020-06-08 | Hydraulic back-up tong of casing power tong |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111720080A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113914795A (en) * | 2021-11-12 | 2022-01-11 | 平煤建工集团特殊凿井工程有限公司 | Jaw-type drill rod disassembling and assembling pliers |
| CN115961899A (en) * | 2022-12-13 | 2023-04-14 | 莱州市霸力石油机械有限公司 | Novel hydraulic back-up tong |
-
2020
- 2020-06-08 CN CN202010513712.9A patent/CN111720080A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113914795A (en) * | 2021-11-12 | 2022-01-11 | 平煤建工集团特殊凿井工程有限公司 | Jaw-type drill rod disassembling and assembling pliers |
| CN115961899A (en) * | 2022-12-13 | 2023-04-14 | 莱州市霸力石油机械有限公司 | Novel hydraulic back-up tong |
| CN115961899B (en) * | 2022-12-13 | 2024-07-05 | 莱州市霸力石油机械有限公司 | Novel hydraulic back-up wrench |
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Application publication date: 20200929 |
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| WW01 | Invention patent application withdrawn after publication |