CN203716876U - Separating type workover rig - Google Patents
Separating type workover rig Download PDFInfo
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- CN203716876U CN203716876U CN201420050196.0U CN201420050196U CN203716876U CN 203716876 U CN203716876 U CN 203716876U CN 201420050196 U CN201420050196 U CN 201420050196U CN 203716876 U CN203716876 U CN 203716876U
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- tightly
- hydraulic cylinder
- support body
- workover rig
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- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 238000009434 installation Methods 0.000 abstract description 9
- 238000012360 testing method Methods 0.000 abstract description 8
- 229910000831 Steel Inorganic materials 0.000 abstract description 3
- 239000010959 steel Substances 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000003921 oil Substances 0.000 description 5
- 230000011218 segmentation Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model relates to the technical field of workover rig devices and provides a separating type workover rig. The separating type workover rig comprises an upper section derrick, a lower section derrick, a derrick base seat, a flexible hydraulic cylinder, a vehicle-mounted main engine and a derrick supporting frame, wherein the upper section derrick is sleeved inside the lower section derrick, and tight ropes are respectively fixedly arranged on the upper section derrick and the lower section derrick. The separating type workover rig can realize the maximization of economic benefit of the device, lowers the production cost, not only satisfies the requirement of oil testing work for hoisting equipment, but also reduces a large number of hoisting and transportation costs; the idleness of the workover rig is avoided, the maintaining expense of the idle workover rig is saved, and the production cost is effectively reduced; the mechanization is achieved to the utmost during installation, the labor is saved, the production cost is reduced, and the working risk can be effectively lowered; the separating type workover rig can realize the twist breaking of a steel wire rope through a dead-line anchor, the consumption of the steel wire rope is effectively lowered, and the hook load reading number is accurate.
Description
Technical field
the utility model relates to workover rig device technique field, is a kind of separate type workover rig.
Background technology
at present in the workover treatment of oil test operation, the a large amount of expense of the annual needs of company is used for fixedly derrick and stands up and transport, cost is very high, if all adopt from now on current well maintenance vehicle as lifting means, according to the feature of oil test operation, the vehicular well maintenance vehicle that has 4/5 is idle, and the maintenance cost that need to cost a lot of money.
in the prior art, the derrick of sectional needs segmentation to be transported to well site, need to flat car, transport with crane lifting, to first segmentation behind well site, with crane, unload down, be assembled into one after derrick, integral vertical gets up again, needs could realize erecting or putting down of derrick with two large-scale cranes, causes cost of transportation high.
the derrick of sectional all belongs to high-risk operations content category in transportation and in standing up process, need auxiliary equipment and personnel many, particularly in the process of standing up, exist well site staff and hang with high-altitude the unsafe factor that thing intersects, cause installation cost high, dangerous large.
workover rig is when promoting operation at present, common way is that dead line anchor is fixed on derrick leg, adopt mechanical tensiometer to read hook load, if but this mode exist installation period long, when steel wire twists, need extract out whole wire rope could realize wire rope broken turn round wire rope section damage whole spooling the defect such as scrap.
Summary of the invention
the utility model provides a kind of separate type workover rig, overcome the deficiency of above-mentioned prior art, it can effectively solve the transportation of current workover rig derrick and install and need segmentation transportation, installs and cause the problem that transportation installation cost is high, installation risk is large, maintenance cost is high, further solves current workover rig and when promoting operation, cannot realize broken the turning round of wire rope and cause wire rope to waste serious problem.
the technical solution of the utility model realizes by following measures: a kind of separate type workover rig, comprises joint derrick, lower joint derrick, derrick base, extending cylinder, on-vehicle host, derrick bracket, upper joint derrick is sleeved in lower joint derrick, on upper joint derrick and lower joint derrick, be installed with respectively guy wire, on upper joint derrick, floating device is installed, the lower end of lower joint derrick is hinged on derrick base, the body of lower joint derrick and extending cylinder is fixedly installed togather, and the piston rod of upper joint derrick and extending cylinder is fixedly installed togather, derrick bracket comprises front arm and the rear arm of support body, bracket raising cylinder, the L-shaped curved shape of difference, the bottom of support body is together with the hinge joint of the right-hand member of on-vehicle host, bracket raising cylinder is fixedly mounted in on-vehicle host, piston rod and the support body of bracket raising cylinder are fixedly installed togather, left side, upper end at support body is installed with hydraulic control power set, the support body left side front end of corresponding hydraulic control power set is installed with front mount pad, the rear end, support body left side of corresponding hydraulic control power set is installed with rear mount pad, on front mount pad and rear mount pad, be hinged with respectively to relatively rotate and can hold lower joint derrick tightly, rotate in opposite directions front arm and the rear arm that can unclamp lower joint derrick, the power output shaft of hydraulic control power set is hinged with the left end of front arm and rear arm respectively.
the further optimization and/or improvements to above-mentioned utility model technical scheme below:
above-mentioned separate type workover rig also comprises dead line anchor and wire rope, dead line anchor is fixedly mounted on derrick base, in on-vehicle host, be provided with working rig winch and single-chip microcomputer, one end of wire rope is wrapped on working rig winch, after the other end pile warp floating device of wire rope, be fixed on dead line anchor, on dead line anchor, have sensor, the signal output part of sensor and the signal input part of single-chip microcomputer are electrically connected by wire.
the sensor is pulling force sensor.
above-mentioned floating device comprises overhead traveling crane and hook, overhead traveling crane is fixedly mounted on the upper end of joint derrick, on overhead traveling crane, be installed with dead line sheave, one end of wire rope is wrapped on working rig winch, after the other end pile warp dead line sheave of wire rope and hook, is fixed on dead line anchor.
before above-mentioned hydraulic control power set comprise, hold tightly hydraulic cylinder and after hold hydraulic cylinder tightly, before the front and rear in the upper end left side of support body is installed with respectively, hold tightly hydraulic cylinder and after hold hydraulic cylinder tightly, the support body left side front end of holding hydraulic cylinder before correspondence tightly is installed with front mount pad, the rear end, support body left side of holding hydraulic cylinder after correspondence tightly is installed with rear mount pad, front hold tightly hydraulic cylinder and after to hold the piston rod of hydraulic cylinder tightly hinged with the left end of front arm and rear arm respectively.
the utility model can the most economical maximizing the benefits of implement device, reduce production costs, not only met the demand of oil test operation to lifting means, also a large amount of liftings and cost of transportation have been saved, and, avoid the idle of well maintenance vehicle, saved the maintenance cost to idle well maintenance vehicle, effectively reduce production costs, during installation, at utmost realize mechanization, not only saved manpower, reduced cost of production, and can effectively reduce operating risk, simultaneously, the utility model can realize by dead line anchor that wire rope is broken to be turned round, effectively reduce the consumption of wire rope, and it is more accurate that hook carries reading.
Accompanying drawing explanation
main TV structure schematic diagram when accompanying drawing 1 is the utility model hauling operation state.
main TV structure schematic diagram when accompanying drawing 2 stands up operation or promotes job state for the utility model.
accompanying drawing 3 is the structure for amplifying schematic diagram at A place in accompanying drawing 2.
what when accompanying drawing 4 is used for the utility model, front arm and rear arm were held lower joint derrick tightly overlooks structure for amplifying schematic diagram.
what when accompanying drawing 5 is used for the utility model, front arm and rear arm were unclamped lower joint derrick overlooks structure for amplifying schematic diagram.
accompanying drawing 6 is the structure for amplifying schematic diagram at B place in accompanying drawing 2.
coding in accompanying drawing is respectively: 1 is upper joint derrick, and 2 is lower joint derrick, and 3 is guy wire, and 4 is derrick base, 5 is extending cylinder, and 6 is support body, and 7 is on-vehicle host, and 8 is bracket raising cylinder, 9 is front arm, and 10 is rear arm, and 11 is front mount pad, 12 is rear mount pad, and 13 is dead line anchor, and 14 is wire rope, 15 is working rig winch, and 16 is sensor, and 17 is overhead traveling crane, 18 is hook, and 19 for front holding hydraulic cylinder tightly, and 20 hold hydraulic cylinder tightly after being.
The specific embodiment
the utility model is not subject to the restriction of following embodiment, can determine concrete embodiment according to the technical solution of the utility model and actual conditions.
in the utility model, for convenience of description, the description of the relative position relation of each parts is to be all described according to the Butut mode of Figure of description 2, as: the position relationship of upper and lower, left and right etc. is to determine according to the Butut direction of Figure of description.
below in conjunction with embodiment and accompanying drawing, the utility model is further described:
embodiment 1, and as shown in accompanying drawing 1,2,3,4,5,6, this separate type workover rig comprises joint derrick 1, lower joint derrick 2, derrick base 4, extending cylinder 5, on-vehicle host 7, derrick bracket, upper joint derrick 1 is sleeved in lower joint derrick 2, on upper joint derrick 1 and lower joint derrick 2, be installed with respectively guy wire 3, on upper joint derrick 1, floating device is installed, the lower end of lower joint derrick 2 is hinged on derrick base 4, the body of lower joint derrick 2 and extending cylinder 5 is fixedly installed togather, and the piston rod of upper joint derrick 1 and extending cylinder 5 is fixedly installed togather, derrick bracket comprises front arm 9 and the rear arm 10 of support body 6, bracket raising cylinder 8, the L-shaped curved shape of difference, together with the bottom of support body 6 links with the right-hand member of on-vehicle host 7, bracket raising cylinder 8 is fixedly mounted in on-vehicle host 7, the piston rod of bracket raising cylinder 8 and support body 6 are fixedly installed togather, left side, upper end at support body 6 is installed with hydraulic control power set, the support body 6 left side front ends of corresponding hydraulic control power set are installed with front mount pad 11, support body 6 rear ends, left side of corresponding hydraulic control power set are installed with rear mount pad 12, on front mount pad 11 and rear mount pad 12, be hinged with respectively to relatively rotate and can hold lower joint derrick 2 tightly, rotate in opposite directions front arm 9 and the rear arm 10 that can unclamp lower joint derrick 2, the power output shaft of hydraulic control power set is hinged with the left end of front arm 9 and rear arm 10 respectively.Adopt the utility model, upper joint derrick 1 and lower joint derrick 2 can be installed together, and separated with on-vehicle host 7, form separate type workover rig, when transportation or installation, by derrick bracket, be connected with on-vehicle host 7, when not carrying out workover treatment, can on-vehicle host 7 is separated with lower joint derrick 2 with upper joint derrick 1, facilitate on-vehicle host 7 to realize other purposes, the most economical maximizing the benefits of implement device; Derrick bracket in the utility model can coordinate with multi-section derrick, derrick can be erected, also can separatedly with derrick go again roping and stand up other derricks, also can under coordinating, complete and put operation with derrick, so both can meet the demand of oil test operation to lifting means, also can save a large amount of liftings and cost of transportation, and, can effectively avoid the idle of well maintenance vehicle on-vehicle host 7, save the maintenance cost to idle well maintenance vehicle on-vehicle host 7, effectively reduce production costs.
embodiment 2, as embodiment 1 preferably, as shown in accompanying drawing 1,2,3,4,5, this separate type workover rig also comprises dead line anchor 13 and wire rope 14, dead line anchor 13 is fixedly mounted on derrick base 4, in on-vehicle host 7, be provided with working rig winch 15 and single-chip microcomputer, one end of wire rope 14 is wrapped on working rig winch 15, after the other end pile warp floating device of wire rope 14, be fixed on dead line anchor 13, on dead line anchor 13, have sensor 16, the signal output part of sensor 16 and the signal input part of single-chip microcomputer are electrically connected by wire.One end of wire rope 14 after pile warp dead line sheave is called dead line end, hydraulic pressure weight indicator is installed on dead line end, the other end that is wrapped in the wire rope 14 on working rig winch 15 is called live line end, the dead line end of wire rope 14 is fixed on dead line anchor 13, dead line anchor 13 is fixed on derrick base 4, adopt hydraulic pressure weight indicator to read hook load, and the utility model can be realized by dead line anchor 13, and wire rope 14 is broken to be turned round, and it is more accurate that hook carries reading, wire rope 14 in dead line anchor 13 reserved somes, when the live line end wire rope 14 of wire rope 14 damages, broken parts can be clipped, unclamp dead line anchor 13, abdicate reserved wire rope 14, can effectively reduce the consumption of wire rope 14 like this.
adopt the utility model when every workover rig derrick is installed, to save 3 people of formation testing class 4 hours, every annual 0.5 volume wire rope (approximately saving 200 meters) of saving of derrick, amount to 5400 meters (approximately save 13t, 160,000 yuan), reduce and stand up derrick number of times 20 times (50t crane 5 people 1 day, approximately save 500,000 yuan).
embodiment 3, as embodiment 2 preferably, as required, sensor 16 is pulling force sensor.Under the cooperation of pulling force sensor and hydraulic pressure weight indicator, it is more accurate that hook carries reading.
embodiment 4, as embodiment 2 and embodiment 3 preferably, as shown in accompanying drawing 1,2, floating device comprises overhead traveling crane 17 and hook 18, overhead traveling crane 17 is fixedly mounted on the upper end of joint derrick 1, on overhead traveling crane 17, be installed with dead line sheave, one end of wire rope 14 is wrapped on working rig winch 15, after the other end pile warp dead line sheave of wire rope 14 and hook 18, is fixed on dead line anchor 13.
embodiment 5, as embodiment 1, embodiment 2, embodiment 3 and embodiment's 4 is preferred, as accompanying drawing 1, 2, 3, shown in 4, before hydraulic control power set comprise, hold tightly hydraulic cylinder 19 and after hold hydraulic cylinder 20 tightly, before the front and rear in the upper end left side of support body 6 is installed with respectively, hold tightly hydraulic cylinder 19 and after hold hydraulic cylinder 20 tightly, the support body 6 left side front ends of holding hydraulic cylinder 19 before correspondence tightly are installed with front mount pad 11, support body 6 rear ends, left side of holding hydraulic cylinder 20 after correspondence tightly are installed with rear mount pad 12, before hold tightly hydraulic cylinder 19 and after to hold the piston rod of hydraulic cylinder 20 tightly hinged with the left end of front arm 9 and rear arm 10 respectively.When needs make front arm 9 and rear arm 10 hold lower joint derrick 2 tightly, hold tightly forward hydraulic cylinder 19 and after hold injection liquid force feed in the cylinder body of hydraulic cylinder 20 tightly, promotion piston rod stretches out, and then promote front arm 9 and rear arm 10 relatively rotates, when needs make front arm 9 and rear arm 10 unclamp lower joint derrick 2, before release, hold tightly hydraulic cylinder 19 and after hold the hydraulic oil in hydraulic cylinder 20 cylinder bodies tightly, now piston rod is regained, and then pulls front arm 9 and rear arm 10 to rotate in opposite directions.
the using method of above-described embodiment: when needs carry out hauling operation, control hydraulic control power set and make front arm 9 and rear arm 10 hold lower joint derrick 2 tightly, when needs stand up operation, the piston rod of first controlling bracket raising cylinder 8 stretches out, and then rise by the piston rod supporting frame 6 of bracket raising cylinder 8, when 6 of support bodys rise to the angle needing, support body 6 stops hoisting, then by controlling hydraulic control power set, make front arm 9 and rear arm 10 parts unclamp lower joint derrick 2, support body 6 continues to hoist, make derrick base slide to ground 4 times, until lower joint derrick 2 is in operating angle, after the guy wire of lower joint derrick 23 is drawn, the piston rod of controlling extending cylinder 5 stretches out, upper joint derrick 1 is risen to after working depth, post-tensioning is the guy wire 3 of upper joint derrick 1 well, when needs promote operation, first make working rig winch 15 rotate, the load of floating device is delivered on dead line anchor 13 by boom hoist cable 14, all the time pressing sensing device 16, the pressure signal that sensor 16 produces, by wire and on-vehicle host 7 socket connections, is realized load and is shown on single-chip microcomputer, when needs carry out folding and unfolding operation, first receive the guy wire 3 of upper joint derrick 1, then the piston rod of controlling on extending cylinder 5 is regained, upper joint derrick 1 is fallen after rise to lower joint derrick 2, then receive the guy wire 3 that falls down joint derrick 2, controlling hydraulic control power set makes front arm 9 and rear arm 10 hold lower joint derrick 2 tightly, lower joint derrick 2 and support body 6 are close to, then receive the guy wire 3 that falls down joint derrick 2, finally control the piston rod of bracket raising cylinder 8 and regain, make support body 6 and lower joint derrick 2 and upper joint derrick 1 slowly fall to being back in on-vehicle host 7.Said method preferably, when needs stand up operation, when support body rises, rise to horizontal sextant angle to be 70 while spending, to stop the support body that hoists.
the utility model can be separated with on-vehicle host 7 with lower joint derrick 2 by upper joint derrick 1, form separate type workover rig, when transportation or installation, by derrick bracket, be connected with on-vehicle host 7, when not carrying out workover treatment, can on-vehicle host 7 is separated with lower joint derrick 2 with upper joint derrick 1, facilitate on-vehicle host 7 to realize other purposes, the most economical maximizing the benefits of implement device, reduces production costs, derrick bracket in the utility model can coordinate with multi-section derrick, derrick can be erected, also can separatedly with derrick go again roping and stand up other derricks, also can in cooperation, complete and put operation with derrick, so both can meet the demand of oil test operation to lifting means, also can save a large amount of liftings and cost of transportation, and, avoid the idle of well maintenance vehicle, saved the maintenance cost to idle well maintenance vehicle, effectively reduce production costs, during installation, at utmost realize mechanization, not only saved manpower, reduced cost of production, and can effectively reduce operating risk.Simultaneously, the utility model can realize by dead line anchor 13 that wire rope 14 is broken to be turned round, and it is more accurate that hook carries reading, wire rope 14 in dead line anchor 13 reserved somes, when the live line end wire rope 14 of wire rope 14 damages, broken parts can be clipped, unclamp dead line anchor 13, abdicate reserved wire rope 14, can effectively reduce like this consumption of wire rope 14.Adopt the utility model when every workover rig derrick is installed, to save 3 people of formation testing class 4 hours, every annual 0.5 volume wire rope (approximately saving 200 meters) of saving of derrick, amount to 5400 meters (approximately save 13t, 160,000 yuan), reduce and stand up derrick number of times 20 times (50t crane 5 people 1 day, approximately save 500,000 yuan).
above technical characterictic has formed embodiment of the present utility model, and it has stronger compliance and implementation result, can increase and decrease according to actual needs non-essential technical characterictic, meets the demand of different situations.
Claims (6)
1. a separate type workover rig, is characterized in that comprising joint derrick, lower joint derrick, derrick base, extending cylinder, on-vehicle host, derrick bracket, upper joint derrick is sleeved in lower joint derrick, on upper joint derrick and lower joint derrick, be installed with respectively guy wire, on upper joint derrick, floating device is installed, the lower end of lower joint derrick is hinged on derrick base, the body of lower joint derrick and extending cylinder is fixedly installed togather, and the piston rod of upper joint derrick and extending cylinder is fixedly installed togather, derrick bracket comprises front arm and the rear arm of support body, bracket raising cylinder, the L-shaped curved shape of difference, the bottom of support body is together with the hinge joint of the right-hand member of on-vehicle host, bracket raising cylinder is fixedly mounted in on-vehicle host, piston rod and the support body of bracket raising cylinder are fixedly installed togather, left side, upper end at support body is installed with hydraulic control power set, the support body left side front end of corresponding hydraulic control power set is installed with front mount pad, the rear end, support body left side of corresponding hydraulic control power set is installed with rear mount pad, on front mount pad and rear mount pad, be hinged with respectively to relatively rotate and can hold lower joint derrick tightly, rotate in opposite directions front arm and the rear arm that can unclamp lower joint derrick, the power output shaft of hydraulic control power set is hinged with the left end of front arm and rear arm respectively.
2. separate type workover rig according to claim 1, characterized by further comprising dead line anchor and wire rope, dead line anchor is fixedly mounted on derrick base, in on-vehicle host, be provided with working rig winch and single-chip microcomputer, one end of wire rope is wrapped on working rig winch, after the other end pile warp floating device of wire rope, be fixed on dead line anchor, have sensor on dead line anchor, the signal output part of sensor and the signal input part of single-chip microcomputer are electrically connected by wire.
3. separate type workover rig according to claim 2, is characterized in that sensor is pulling force sensor.
4. according to the separate type workover rig described in claim 2 or 3, it is characterized in that floating device comprises overhead traveling crane and hook, overhead traveling crane is fixedly mounted on the upper end of joint derrick, on overhead traveling crane, be installed with dead line sheave, one end of wire rope is wrapped on working rig winch, after the other end pile warp dead line sheave of wire rope and hook, is fixed on dead line anchor.
5. according to the separate type workover rig described in claim 1 or 2 or 3, it is characterized in that holding tightly before hydraulic control power set comprise hydraulic cylinder and after hold hydraulic cylinder tightly, before the front and rear in the upper end left side of support body is installed with respectively, hold tightly hydraulic cylinder and after hold hydraulic cylinder tightly, the support body left side front end of holding hydraulic cylinder before correspondence tightly is installed with front mount pad, the rear end, support body left side of holding hydraulic cylinder after correspondence tightly is installed with rear mount pad, front hold tightly hydraulic cylinder and after to hold the piston rod of hydraulic cylinder tightly hinged with the left end of front arm and rear arm respectively.
6. separate type workover rig according to claim 4, it is characterized in that holding tightly before hydraulic control power set comprise hydraulic cylinder and after hold hydraulic cylinder tightly, before the front and rear in the upper end left side of support body is installed with respectively, hold tightly hydraulic cylinder and after hold hydraulic cylinder tightly, the support body left side front end of holding hydraulic cylinder before correspondence tightly is installed with front mount pad, the rear end, support body left side of holding hydraulic cylinder after correspondence tightly is installed with rear mount pad, front hold tightly hydraulic cylinder and after to hold the piston rod of hydraulic cylinder tightly hinged with the left end of front arm and rear arm respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420050196.0U CN203716876U (en) | 2014-01-26 | 2014-01-26 | Separating type workover rig |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420050196.0U CN203716876U (en) | 2014-01-26 | 2014-01-26 | Separating type workover rig |
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| Publication Number | Publication Date |
|---|---|
| CN203716876U true CN203716876U (en) | 2014-07-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420050196.0U Expired - Lifetime CN203716876U (en) | 2014-01-26 | 2014-01-26 | Separating type workover rig |
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| Country | Link |
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| CN (1) | CN203716876U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103806850A (en) * | 2014-01-26 | 2014-05-21 | 中国石油集团西部钻探工程有限公司 | Separating workover rig and use method thereof |
| CN114352214A (en) * | 2022-01-06 | 2022-04-15 | 茹国琼 | Energy storage type direct-drive electric workover rig without guy rope net |
-
2014
- 2014-01-26 CN CN201420050196.0U patent/CN203716876U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103806850A (en) * | 2014-01-26 | 2014-05-21 | 中国石油集团西部钻探工程有限公司 | Separating workover rig and use method thereof |
| CN103806850B (en) * | 2014-01-26 | 2016-07-06 | 中国石油集团西部钻探工程有限公司 | Separate type workover rig and using method thereof |
| CN114352214A (en) * | 2022-01-06 | 2022-04-15 | 茹国琼 | Energy storage type direct-drive electric workover rig without guy rope net |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201113 Address after: 100120 Beijing Xicheng District six laying Kang Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Xibu Drilling Engineering Co.,Ltd. Address before: 834000 the Xinjiang Uygur Autonomous Region Karamay Friendship Road No. 115 joint office building oil testing company Patentee before: CNPC Xibu Drilling Engineering Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140716 |