CN201705247U - Spinning wrench used for mounting or dismounting drilling rod and casing - Google Patents

Spinning wrench used for mounting or dismounting drilling rod and casing Download PDF

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Publication number
CN201705247U
CN201705247U CN201020128534XU CN201020128534U CN201705247U CN 201705247 U CN201705247 U CN 201705247U CN 201020128534X U CN201020128534X U CN 201020128534XU CN 201020128534 U CN201020128534 U CN 201020128534U CN 201705247 U CN201705247 U CN 201705247U
Authority
CN
China
Prior art keywords
pincers
tooth
gear
oil motor
card
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN201020128534XU
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Chinese (zh)
Inventor
黄可唯
李斌
刘春全
李阳
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Chengdu Shiwei Technology Co Ltd
Original Assignee
Chengdu Shiwei Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chengdu Shiwei Technology Co Ltd filed Critical Chengdu Shiwei Technology Co Ltd
Priority to CN201020128534XU priority Critical patent/CN201705247U/en
Application granted granted Critical
Publication of CN201705247U publication Critical patent/CN201705247U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model discloses a spinning wrench used for mounting or dismounting a drilling rod and a casing. The spinning wrench comprises a moving wrench and a fixed wrench, which can rotate relative to each other, wherein a driving oil motor slider is arranged on the case body of the fixed wrench, a clamping tooth driving oil motor support plate is arranged on the driving oil motor slider, a clamping tooth driving oil motor is arranged on the clamping tooth driving oil motor support plate, the power output connector of the clamping tooth driving oil motor corresponds to the input connector of a power transmission shaft inside the moving wrench, a support plate pushing cylinder is arranged on the driving oil motor slider, and the pushing end of the support plate pushing cylinder is connected with the clamping tooth driving oil motor support plate. With the structural design, the spinning wrench can rapidly and accurately complete the spin connection of the drilling pipe and ensure that the pipe connection process is stable and rapid, thereby increasing the pipe connection efficiency and reducing the labor intensity and the hazard to workers.

Description

The spinner pincers of a kind of connecting and disconnecting drill rod and sleeve pipe
Technical field
The utility model belongs to the oil drilling apparatus field, relates to the spinner pincers of a kind of connecting and disconnecting drill rod and sleeve pipe concretely.
Background technology
Along with the national economic development, the demand of petroleum gas is increasing, and this just requires the exploration and development velocity efficiency to need to improve, in the drilling well drilling process, along with the degree of depth that pierces constantly increases, need constantly on existing drilling pipe, to increase new drilling pipe, be commonly called as " adapter ".Most of operation is all by manually-operated in the adapter process, difficulty is big, the labour intensity height, dangerous big, normally need in mouse hole drilling pipe be connected the drilling pipe that will newly connect then earlier for 3 one group hangs out it by equipment such as hoist lines from mouse hole, move to the upper end of existing drilling pipe in the drilling well, the drilling pipe that newly connects is adjusted to the upper end of vertical direction over against existing drilling pipe, 3 drilling pipes that connect together that newly connect are docked with existing drilling pipe in the drilling well screw the growth of finishing drilling pipe in the drilling well, as above, need in the time of in mouse hole to take over, the pipe that connects also will be connected with the pipe in the drilling well when moving on to the drilling well top, longer owing to drilling pipe itself in said process, heavier, " move ", " seat adjustment " " butt joint screws " cooperates auxiliary mode time-consuming with the people at present, effort efficient is low, labour intensity is big, dangerous high, it is very inconvenient to operate.Especially the process of 3 adapters when mouse hole, because the pipe in the mouse hole and raise up the pipe of preparing to connect and can have inclination, two pipes align the trouble that screws and link closely.
The utility model content
The utility model takes over for overcoming in the prior art that efficient is not high, labour intensity is big, dangerous high defective provides a kind of connecting and disconnecting drill rod of the adapter that can finish screwing of drilling pipe, especially mouse hole and drilling well accurately and rapidly and the spinner pincers of sleeve pipe.
The technical solution of the utility model is as follows:
These spinner pincers comprise by relatively turnable Power Tong and fixing pincers and forming, described fixedly pincers comprise fixing pincers housing, the bull gear with opening and canine tooth ring support, described canine tooth figure seat is arranged on the gripper shoe of described fixedly pincers housing top setting, described bull gear bottom has cannelure, upper surface is provided with alignment pin, is sleeved on described bull gear on the described canine tooth ring support and bull gear can rotate relative to the canine tooth ring support by this cannelure; Also be provided with the bull gear driven wheel and the gear that links closely on the described gripper shoe, this bull gear driven wheel and the gear that links closely are connected with the outer ring of oil motor independently and described bull gear driven wheel, link closely gear and bull gear and mesh in twos; Be provided with the pincers tooth clamping device of two symmetric arrangement in the described fixedly pincers housing of described gripper shoe below, this pincers tooth clamping device comprises worm and gear assembly, pliers tooth base, driving mechanism, described driving oil motor is connected with the worm screw power intake of described worm and gear assembly, worm gear in the described worm and gear assembly is connected with pincers crest bar, be rotary with pincers crest tube on this pincers crest bar, the described pliers tooth base of suit on this pincers crest tube, be connected with the pincers tooth on this pliers tooth base, the pincers tooth in the described two pincers tooth clamping devices is in opposite directions and towards the jaw center of described fixedly pincers;
Described Power Tong comprises the Power Tong housing, power transmission shaft, described Power Tong housing is provided with and the corresponding pin-and-hole of the alignment pin of described bull gear upper surface, be provided with the card tooth clamping device of two symmetric arrangement in the described Power Tong housing, this card tooth clamping device comprises worm screw, worm gear and be connected card crest bar on the worm gear, be rotary with card crest tube on this card crest bar, be set with card tooth holder on this card crest tube, this card tooth holder front end has mounting groove, this mounting groove up and down the inwall symmetry have a deep-slotted chip breaker, be provided with pin between two deep-slotted chip breakers, this pin is hinged with card tooth floating seat, be connected with the card tooth on this card tooth floating seat, the output of described power transmission shaft is connected with described worm screw, described power transmission shaft has input adapter, has the power end patchhole on the described Power Tong housing of this input adapter correspondence;
On described fixedly pincers housing, also be provided with and drive the oil motor slide, this driving oil motor slide is provided with the card tooth and drives the oil motor support plate, this card tooth drives card tooth driving oil motor is housed on the oil motor support plate, the power output connector that this card tooth drives oil motor is corresponding with the input adapter of described Power Tong medium power power transmission shaft, drive the oil motor slide and be provided with support plate promotion oil cylinder, the promote-side that this support plate promotes oil cylinder is connected with described card tooth driving oil motor support plate.
Said structure is to fixing pincers in the spinner pincers, the design of the Power Tong and the parts that match has realized treating the clamping that connects down two pipes, the rotation of Power Tong relative fixed pincers simultaneously realizes screwing of pipe up and down, the rotation of Power Tong is rotated by bull gear and is realized, alignment pin that pin-and-hole is plugged on the bull gear upper surface is set on the Power Tong housing makes bull gear drive the Power Tong housing when rotating and whole Power Tong rotates, bull gear is driven by the bull gear driven wheel and rotates around the canine tooth ring support, the bull gear driven wheel provides power by the oil motor of its connection, also be provided with the gear that links closely in this structure, the purpose that is provided with of this structure is to screw when acquiring a certain degree when aforesaid, this gear that links closely provides an enough big force of the breath of tightening, the purpose that two drilling pipes is up and down arrived link closely when releasing (otherwise unload pipe).And before rotating, need pipe clamping respectively up and down, Power Tong clamps swinging head, the fixing motionless pipe of the tight below of clamp, drive two pincers teeth and move in opposite directions to the jaw center drilling pipe is clamped by driving oil motor in the fixing pincers, drive oil motor enough big chucking power can be provided, simultaneously since fixing pincers be need not rotate so drive oil motor and can be connected with extraneous oil pipe; To go up swinging head by moving of card tooth in the Power Tong clamps, the ingenious part of this programme just is because Power Tong is designed to rotating, and by this Power Tong the stable clamping of last swinging head is rotated and to reach spinning of two pipes, (need to provide 2 main power sources in the Power Tong, the one, the rotation of bull gear drives the rotation of Power Tong, the 2nd, the clamping of drilling pipe being driven mobile the provide pretension chucking power of oil motor to the card tooth by the card tooth by the card tooth) said structure can reach freely rotating of Power Tong relative fixed pincers and can not be subjected to the interference of other connection, for guaranteeing that the card tooth drives the rotation after can not influencing when oil motor can provide clamping force for the card tooth, designed the clamping force input mode of separate type in this structure, the card tooth driving oil motor that support plate promotes on the oil cylinder push card tooth driving oil motor support plate when promptly clamping is close to Power Tong, dock up to the power output connector insertion Power Tong housing of card tooth driving oil motor and with the input adapter of power transmission shaft, start the card tooth and drive oil motor by the transmission push card tooth clamping drilling pipe of power transmission shaft to power, the power output connector that clamping back control support plate promotion oil cylinder will block tooth driving oil motor withdraws from from the Power Tong housing, driving Power Tong then rotates, realized the function that clamps and rotate cleverly, avoided Power Tong for realizing the interference that two functions may exist simultaneously.
Wherein card tooth holder front end has mounting groove in Power Tong, this mounting groove up and down the inwall symmetry have a deep-slotted chip breaker, be provided with pin between two deep-slotted chip breakers, this pin is hinged with card tooth floating seat, be connected with the card tooth on this card tooth floating seat, the effect of this structure is to have the purpose of wedging, card tooth floating seat drives the slippage of card tooth by pin slippage in deep-slotted chip breaker in Ka Ya starts to walk rotation process with preliminary clamping drilling pipe, diminish by radial distance between adjustment two pins of deep-slotted chip breaker, the card tooth is tending towards the purpose that arrival " from wedge " drawn close at the center, make the card tooth more abundant to the clamping of drilling pipe, accommodation is bigger.
Described gripper shoe is provided with 2 bull gear driven wheels and 1 gear that links closely, described 2 bull gear driven wheels are in the described gear both sides and at described bull gear driven wheel and link closely and be provided with travelling gear between the gear, this travelling gear is meshed with the described bull gear driven wheel and the gear that links closely of linking closely.
2 travelling gears that 2 bull gear driven wheels, 1 gear that links closely are provided with between reaching have been realized the uniform distribution of original power is guaranteed the steady of bull gear rotation by the interlock of 5 teeth.
Between two worm screw front ends of described two worm and gear assemblies, be horizontally connected with adjustable plate, wherein the worm screw front end is spun on the screw on the described adjustable plate, the adjustable plate middle part is provided with regulating block, this regulating block and the two corresponding jaw centers towards described fixedly pincers of pincers tooth of clamping in the tooth clamping devices.
Regulating block be arranged in the process that the pincers tooth clamps that regulating block is also realized moving simultaneously and with drilling pipe against, utilize the principle of 3 point locations to arrive to the setting upright of drilling pipe, prevent to have only the clamping of 2 pincers teeth may produce the skew of drilling pipe in clamping or rotating.
Be provided with horizontal roller and vertical roller between described bull gear and the canine tooth ring support, described canine tooth ring support upper surface is provided with roller cage, and this roller cage has the roller groove, and described horizontal roller is placed in the roller groove in the described roller cage; Described vertical roller is arranged on the bottom of described canine tooth ring support, and the rotating shaft of described vertical roller is connected with gripper shoe with the canine tooth ring support respectively.
Horizontal roller and vertical roller the sliding that improves between the relative canine tooth ring support of bull gear is set, the frictional force that reduces greatly between the two makes rotation more steady.
Be provided with vertical fastener between described bull gear and the described gripper shoe.
Vertical fastener is fixed on the gripper shoe, and bull gear can rotate relative to vertical fastener simultaneously, and this fastener is in order to prevent that the bull gear in the vertical direction breaks away from gripper shoe.
Beneficial effect: by the design to the spinner in this programme pincers, this structure can be finished spinning of drilling pipe accurately and rapidly, has improved fast and takes over efficient, reduced labour intensity and to workman's danger thereby take over process stabilization.
Description of drawings
The utility model will illustrate by example and with reference to the mode of accompanying drawing, wherein:
The structural representation of fixing pincers in Fig. 1 the utility model;
Fig. 2 is the A-A sectional view of Fig. 1;
Fig. 3 is for driving oil motor slide, card tooth drive the oil motor support plate, the card tooth drives the oil motor connection layout;
Fig. 4 is the bull gear structural representation;
Fig. 5 is the A-A sectional view of Fig. 4;
Fig. 6 is the Power Tong structural representation;
Fig. 7 is the B-B sectional view of Fig. 6;
Fig. 8 is the A-A sectional view of Fig. 7.
The specific embodiment
Shown in Fig. 1,2,4,5: as described in fixedly pincers comprise fixing pincers housing 501, bull gear 502 and canine tooth ring support 503 with opening, described canine tooth ring support 503 is arranged on the gripper shoe 504 of described fixedly pincers housing 501 tops setting, described bull gear 502 bottoms have cannelure, upper surface is provided with alignment pin 513, are sleeved on described bull gear 502 on the described canine tooth ring support 503 and bull gear 502 can rotate relative to canine tooth ring support 503 by this cannelure; Also be provided with bull gear driven wheel 505 on the described gripper shoe 504 and the gear 506 that links closely, this bull gear driven wheel 505 and the gear 506 that links closely are connected with the outer ring of oil motor independently and described bull gear driven wheel 505, link closely gear 506 and bull gear 502 and mesh in twos; Be provided with the pincers tooth clamping device of two symmetric arrangement in the described fixedly pincers housing 501 of described gripper shoe 504 belows, this pincers tooth clamping device comprises worm and gear assembly 507, pliers tooth base 508, driving mechanism 509, described driving oil motor 509 is connected with the worm screw power intake of described worm and gear assembly 507, worm gear in the described worm and gear assembly 507 is connected with pincers crest bar 510, be rotary with pincers crest tube 511 on this pincers crest bar 510, the described pliers tooth base 508 of suit on this pincers crest tube 511, be connected with pincers tooth 512 on this pliers tooth base 508, the pincers tooth 512 in the described two pincers tooth clamping devices is in opposite directions and towards the jaw center of described fixedly pincers;
As Fig. 6,7, shown in 8: described Power Tong comprises Power Tong housing 401, power transmission shaft 402, described Power Tong housing 401 is provided with the alignment pin 513 corresponding pin-and-holes 414 with described bull gear 502 upper surfaces, be provided with the card tooth clamping device of two symmetric arrangement in the described Power Tong housing 401, this card tooth clamping device comprises worm screw 403, worm gear 404 and be connected card crest bar 405 on the worm gear 404, be rotary with card crest tube 406 on this card crest bar 405, be set with card tooth holder 407 on this card crest tube 406, these card tooth holder 407 front ends have mounting groove, this mounting groove up and down the inwall symmetry have a deep-slotted chip breaker 410, be provided with pin 408 between two deep-slotted chip breakers 410, this pin 408 is hinged with card tooth floating seat 409, be connected with card tooth 411 on this card tooth floating seat 409, the output of described power transmission shaft 402 is connected with described worm screw 403, described power transmission shaft 402 has input adapter 412, has power end patchhole 413 on the described Power Tong housing 401 of these input adapter 412 correspondences;
In the structure of above-mentioned Power Tong and fixing pincers, the pincers tooth is movably connected on the pliers tooth base, the card tooth is movably connected in card tooth floating seat, described flexible connection can adopt hinged form as hinged with pin, also can adopt the form of floating and connecting, as opening and clamp the groove that the thread form shape is complementary at the pliers tooth base front end, to clamp tooth is placed in this groove, purpose is that pincers tooth or card tooth have the purpose of self adaptation caliber, adjusts its age of a draught animal that angle is automatically at different caliber pincers teeth or card tooth and fully contacts the stability that assurance steps up with external diameter of pipe.
As shown in Figure 3: on described fixedly pincers housing 501, also be provided with and drive oil motor slide 414, this driving oil motor slide 414 is provided with the card tooth and drives oil motor support plate 415, this card tooth drives card tooth driving oil motor 416 is housed on the oil motor support plate 415, the power output connector 418 that this card tooth drives oil motor 416 is corresponding with the input adapter 412 of described Power Tong medium power power transmission shaft 402, drive oil motor slide 414 and be provided with support plate promotion oil cylinder 417, the promote-side that this support plate promotes oil cylinder 417 is connected with described card tooth driving oil motor support plate 415.
As shown in Figure 1: described gripper shoe 504 is provided with 2 bull gear driven wheels 505 and 1 gear 506 that links closely, described 2 bull gear driven wheels 505 are in described gear 506 both sides and at described bull gear driven wheel 505 and link closely and be provided with travelling gear 519 between the gear 506, this travelling gear 519 is meshed with the described bull gear driven wheel 505 and the gear 506 that links closely of linking closely.
As shown in Figure 1: between two worm screw front ends of described two worm and gear assemblies 507, be horizontally connected with adjustable plate 514, wherein the worm screw front end is spun on the screw on the described adjustable plate 514, adjustable plate 514 middle parts are provided with regulating block 515, this regulating block 515 and the two pincers tooth 512 corresponding jaw centers towards described fixedly pincers of clamping in the tooth clamping devices.
As shown in Figure 1, 2: be provided with horizontal roller 516 and vertical roller 517 between described bull gear 502 and the canine tooth ring support 503, described canine tooth ring support 503 upper surfaces are provided with roller cage 518, this roller cage 518 has the roller groove, and described horizontal roller 516 is placed in the roller groove in the described roller cage 518; Described vertical roller 517 is arranged on the bottom of described canine tooth ring support 503, and the rotating shaft of described vertical roller 517 is connected with gripper shoe 504 with canine tooth ring support 503 respectively.
Be provided with vertical fastener 520 between described bull gear 502 and the described gripper shoe 504.

Claims (5)

1. the spinner of connecting and disconnecting drill rod and sleeve pipe pincers, it is characterized in that: these spinner pincers comprise by relatively turnable Power Tong and fixing pincers and forming, described fixedly pincers comprise fixing pincers housing (501), bull gear (502) and canine tooth ring support (503) with opening, described canine tooth ring support (503) is arranged on the gripper shoe (504) of described fixedly pincers housing (501) top setting, described bull gear (502) bottom has cannelure, upper surface is provided with alignment pin (513), described bull gear (502) is sleeved on that described canine tooth ring support (503) is gone up and bull gear (502) can rotate relative to canine tooth ring support (503) by this cannelure; Also be provided with bull gear driven wheel (505) and the gear that links closely (506) on the described gripper shoe (504), this bull gear driven wheel (505) and the gear that links closely (506) are connected with the outer ring of oil motor independently and described bull gear driven wheel (505), the gear that links closely (506) and bull gear (502) and mesh in twos; Be provided with the pincers tooth clamping device of two symmetric arrangement in the described fixedly pincers housing (501) of described gripper shoe (504) below, this pincers tooth clamping device comprises worm and gear assembly (507), pliers tooth base (508), driving mechanism (509), described driving oil motor (509) is connected with the worm screw power intake of described worm and gear assembly (507), worm gear in the described worm and gear assembly (507) is connected with pincers crest bar (510), be rotary with pincers crest tube (511) on this pincers crest bar (510), these pincers crest tubes (511) are gone up the described pliers tooth base of suit (508), be connected with pincers tooth (512) on this pliers tooth base (508), the pincers tooth (512) in the described two pincers tooth clamping devices is in opposite directions and towards the jaw center of described fixedly pincers;
Described Power Tong comprises Power Tong housing (401), power transmission shaft (402), described Power Tong housing (401) is provided with the corresponding pin-and-hole of alignment pin (513) (414) with described bull gear (502) upper surface, be provided with the card tooth clamping device of two symmetric arrangement in the described Power Tong housing (401), this card tooth clamping device comprises worm screw (403), worm gear (404) and be connected card crest bar (405) on the worm gear (404), be rotary with card crest tube (406) on this card crest bar (405), be set with card tooth holder (407) on this card crest tube (406), this card tooth holder (407) front end has mounting groove, this mounting groove up and down the inwall symmetry have a deep-slotted chip breaker (410), be provided with pin (408) between two deep-slotted chip breakers (410), this pin (408) is hinged with card tooth floating seat (409), be connected with card tooth (411) on this card tooth floating seat (409), the output of described power transmission shaft (402) is connected with described worm screw (403), described power transmission shaft (402) has input adapter (412), has power end patchhole (413) on the described Power Tong housing (401) of this input adapter (412) correspondence;
On described fixedly pincers housing (501), also be provided with and drive oil motor slide (414), this driving oil motor slide (414) is provided with the card tooth and drives oil motor support plate (415), this card tooth drives card tooth driving oil motor (416) is housed on the oil motor support plate (415), the power output connector (418) that this card tooth drives oil motor (416) is corresponding with the input adapter (412) of described Power Tong medium power power transmission shaft (402), drive oil motor slide (414) and be provided with support plate promotion oil cylinder (417), the promote-side that this support plate promotes oil cylinder (417) is connected with described card tooth driving oil motor support plate (415).
2. the spinner pincers of a kind of connecting and disconnecting drill rod according to claim 1 and sleeve pipe, it is characterized in that: described gripper shoe (504) is provided with 2 bull gear driven wheels (505) and 1 gear that links closely (506), described 2 bull gear driven wheels (505) are positioned at the described gear that links closely (506) both sides and are provided with travelling gear (519) between described bull gear driven wheel (505) and the gears that links closely (506), and this travelling gear (519) is meshed with described bull gear driven wheel (505) and the gear that links closely (506).
3. the spinner pincers of a kind of connecting and disconnecting drill rod according to claim 1 and sleeve pipe, it is characterized in that: between two worm screw front ends of described two worm and gear assemblies (507), be horizontally connected with adjustable plate (514), wherein the worm screw front end is spun on the screw on the described adjustable plate (514), adjustable plate (514) middle part is provided with regulating block (515), this regulating block (515) and the two corresponding jaw centers towards described fixedly pincers of pincers tooth (512) of clamping in the tooth clamping devices.
4. the spinner pincers of a kind of connecting and disconnecting drill rod according to claim 1 and sleeve pipe, it is characterized in that: be provided with horizontal roller (516) and vertical roller (517) between described bull gear (502) and the canine tooth ring support (503), described canine tooth ring support (503) upper surface is provided with roller cage (518), this roller cage (518) has the roller groove, and described horizontal roller (516) is placed in the roller groove in the described roller cage (518); Described vertical roller (517) is arranged on the bottom of described canine tooth ring support (503), and the rotating shaft of described vertical roller (517) is connected with gripper shoe (504) with canine tooth ring support (503) respectively.
5. the spinner pincers of a kind of connecting and disconnecting drill rod according to claim 1 and sleeve pipe is characterized in that: be provided with vertical fastener (520) between described bull gear (502) and the described gripper shoe (504).
CN201020128534XU 2010-02-10 2010-02-10 Spinning wrench used for mounting or dismounting drilling rod and casing Expired - Lifetime CN201705247U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201020128534XU CN201705247U (en) 2010-02-10 2010-02-10 Spinning wrench used for mounting or dismounting drilling rod and casing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201020128534XU CN201705247U (en) 2010-02-10 2010-02-10 Spinning wrench used for mounting or dismounting drilling rod and casing

Publications (1)

Publication Number Publication Date
CN201705247U true CN201705247U (en) 2011-01-12

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Family Applications (1)

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CN201020128534XU Expired - Lifetime CN201705247U (en) 2010-02-10 2010-02-10 Spinning wrench used for mounting or dismounting drilling rod and casing

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101781975A (en) * 2010-02-10 2010-07-21 成都世唯科技有限公司 Screwing and buckling clamp for connecting and disassembling drill rod and sleeve pipe
CN103266861A (en) * 2013-06-03 2013-08-28 西安石油大学 Roller type non-creasing clamp holder for punching piers of iron roughneck

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101781975A (en) * 2010-02-10 2010-07-21 成都世唯科技有限公司 Screwing and buckling clamp for connecting and disassembling drill rod and sleeve pipe
CN101781975B (en) * 2010-02-10 2012-07-11 成都世唯科技有限公司 Screwing and buckling clamp for connecting and disassembling drill rod and sleeve pipe
CN103266861A (en) * 2013-06-03 2013-08-28 西安石油大学 Roller type non-creasing clamp holder for punching piers of iron roughneck

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C14 Grant of patent or utility model
GR01 Patent grant
AV01 Patent right actively abandoned

Granted publication date: 20110112

Effective date of abandoning: 20120711