CN103806850A - Separating workover rig and use method thereof - Google Patents

Abstract

The invention relates to the technical field of workover rig devices, in particular to a separating workover rig and a use method of the separating workover rig. The separating workover rig comprises an upper-section derrick, a lower-section derrick, a derrick base, a telescopic hydraulic cylinder, an on-board host computer and a derrick carrier. The upper-section derrick is arranged in the lower-section derrick in a sleeved mode. Anchor ropes are fixedly installed on the upper-section derrick and the lower-section derrick respectively. According to the separating workover rig, the economic benefit of a device can be maximized, the production cost is reduced, the requirement for a lifting device by formation testing operation is met, a large amount of hoisting and transportation cost is saved, a workover vehicle is prevented from being left unused, the maintenance cost spent on the workover vehicle which is left unused is saved, the production cost is effectively reduced, mechanization is achieved to the maximum degree in installation, manpower is saved, the production cost is reduced, and operating risks can be effectively reduced. Meanwhile, a steel wire rope can be twisted in the reverse direction through a deadline anchor, consumption of the steel wire rope is effectively reduced, and hooked load reading is more accurate.

Description

Separate type workover rig and using method thereof

Technical field

the present invention relates to workover rig device technique field, is a kind of separate type workover rig and using method thereof.

Background technology

at present in the workover treatment of oil test operation, company needs a large amount of expenses to stand up and transport for fixing derrick every year, 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, by idle the vehicular well maintenance vehicle that has 4/5, 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, unload down with crane to first segmentation behind well site, 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 exist well site staff in the process of standing up and hang with high-altitude the unsafe factor that thing intersects, cause installation cost high, dangerous large.

workover rig is in the time 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, in the time that 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 invention provides a kind of separate type workover rig and using method thereof, 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 in the time promoting operation, cannot realize broken the turning round of wire rope and cause wire rope to waste serious problem.

one of technical scheme of the present invention 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 one of foregoing invention 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.

two of technical scheme of the present invention realizes by following measures: a kind of using method of separate type workover rig, and in the time that needs carry out hauling operation, control hydraulic control power set and make front arm and rear arm hold lower joint derrick tightly, in the time that needs stand up operation, the piston rod of first controlling bracket raising cylinder stretches out, and then rise by the piston rod supporting frame of bracket raising cylinder, in the time that support body works the angle that rises to needs, stop the support body that hoists, then make front arm and rear arm part unclamp lower joint derrick by controlling hydraulic control power set, continue the support body that hoists, make to slide to ground under derrick base, until lower joint derrick is in operating angle, after the guy wire of lower joint derrick is drawn, the piston rod of controlling extending cylinder stretches out, upper joint derrick is risen to after working depth, post-tensioning is the guy wire of upper joint derrick well, in the time that needs promote operation, first make working rig winch rotate, the load of floating device is delivered on dead line anchor by boom hoist cable, all the time pressing sensing device, the pressure signal that sensor produces, by wire and on-vehicle host socket connection, is realized load and is shown on single-chip microcomputer, in the time that needs carry out folding and unfolding operation, first receive the guy wire of upper joint derrick, then the piston rod of controlling on extending cylinder is regained, upper joint derrick is fallen after rise to lower joint derrick, then receive the guy wire that falls down joint derrick, control hydraulic control power set and make front arm and rear arm hold lower joint derrick tightly, lower joint derrick and support body are close to, then receive the guy wire that falls down joint derrick, finally control the piston rod of bracket raising cylinder and regain, make support body and lower joint derrick and upper joint derrick slowly fall to being back in on-vehicle host.

two the further optimization and/or improvements to foregoing invention technical scheme below:

above-mentioned in the time that needs stand up operation, when rising, support body rises to horizontal sextant angle to be 70 while spending, to stop the support body that hoists.

the present invention can the most economical maximizing the benefits of implement device, reduce production costs, not only meet 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, save the maintenance cost to idle well maintenance vehicle, effectively reduce production costs, when installation, at utmost realize mechanization, not only save manpower, reduce cost of production, and can effectively reduce operating risk, simultaneously, the present invention 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 hauling operation state of the present invention.

main TV structure schematic diagram when accompanyingdrawing 2 stands up operation or promotes job state for the present invention.

accompanying drawing 3 is the structure for amplifying schematic diagram at A place in accompanyingdrawing 2.

what when accompanying drawing 4 uses for the present invention, front arm and rear arm were held lower joint derrick tightly overlooks structure for amplifying schematic diagram.

what when accompanying drawing 5 uses for the present invention, 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 accompanyingdrawing 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 present invention is not subject to the restriction of following embodiment, can determine concrete embodiment according to technical scheme of the present invention and actual conditions.

in the present invention, 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 ofdescription 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 invention will be further described:

embodiment 1, as shown in accompanyingdrawing 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 inlower joint derrick 2, on upper joint derrick 1 andlower joint derrick 2, be installed with respectively guy wire 3, on upper joint derrick 1, floating device is installed, the lower end oflower joint derrick 2 is hinged on derrick base 4, the body oflower 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 holdlower joint derrick 2 tightly, rotate in opposite directions front arm 9 and the rear arm 10 that can unclamplower 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 present invention, upper joint derrick 1 andlower joint derrick 2 can be installed together, and separate with on-vehicle host 7, form separate type workover rig, when transportation or installation, be connected with on-vehicle host 7 by derrick bracket, in the time not carrying out workover treatment, on-vehicle host 7 can be separated withlower 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 present invention can coordinate with multi-section derrick, derrick can be erected, also can separate with derrick and 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 accompanyingdrawing 1,2,3,4,5, this separate type workover rig also comprisesdead line anchor 13 andwire rope 14,dead line anchor 13 is fixedly mounted on derrick base 4, in on-vehicle host 7, be provided with workingrig winch 15 and single-chip microcomputer, one end ofwire rope 14 is wrapped on workingrig winch 15, after the other end pile warp floating device ofwire rope 14, be fixed ondead line anchor 13, ondead line anchor 13, havesensor 16, the signal output part ofsensor 16 and the signal input part of single-chip microcomputer are electrically connected by wire.One end ofwire 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 thewire rope 14 on workingrig winch 15 is called live line end, the dead line end ofwire rope 14 is fixed ondead line anchor 13,dead line anchor 13 is fixed on derrick base 4, adopt hydraulic pressure weight indicator to read hook load, and the present invention can realize bydead line anchor 13, andwire rope 14 is broken to be turned round, and it is more accurate that hook carries reading, at thewire rope 14 ofdead line anchor 13 reserved somes, in the time that the live lineend wire rope 14 ofwire rope 14 damages, broken parts can be clipped, unclampdead line anchor 13, abdicatereserved wire rope 14, can effectively reduce like this consumption ofwire rope 14.

adopt the present invention in the time that 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, asembodiment 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, asembodiment 2 and embodiment 3 preferably, as shown in accompanyingdrawing 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 ofwire rope 14 is wrapped on workingrig winch 15, after the other end pile warp dead line sheave ofwire rope 14 and hook 18, is fixed ondead line anchor 13.

embodiment 5, as embodiment 1,embodiment 2, embodiment 3 and embodiment's 4 is preferred, as accompanyingdrawing 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.In the time that needs make front arm 9 and rear arm 10 holdlower 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 and relatively rotate, in the time that needs make front arm 9 and rear arm 10 unclamplower 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.

embodiment 6, the using method of this separate type workover rig: in the time that needs carry out hauling operation, control hydraulic control power set and make front arm 9 and rear arm 10 holdlower joint derrick 2 tightly, in the time that 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, in the time that 6 of support bodys rise to the angle needing, support body 6 stops hoisting, then make front arm 9 and rear arm 10 parts unclamplower joint derrick 2 by controlling hydraulic control power set, support body 6 continues to hoist, make derrick base slide to ground 4 times, untillower 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, in the time that needs promote operation, first make workingrig winch 15 rotate, the load of floating device is delivered ondead line anchor 13 byboom hoist cable 14, all the time pressingsensing device 16, the pressure signal thatsensor 16 produces, by wire and on-vehicle host 7 socket connections, is realized load and is shown on single-chip microcomputer, in the time that 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 tolower joint derrick 2, then receive the guy wire 3 that falls downjoint derrick 2, controlling hydraulic control power set makes front arm 9 and rear arm 10 holdlower joint derrick 2 tightly,lower joint derrick 2 and support body 6 are close to, then receive the guy wire 3 that falls downjoint derrick 2, finally control the piston rod of bracket raising cylinder 8 and regain, make support body 6 andlower joint derrick 2 and upper joint derrick 1 slowly fall to being back in on-vehicle host 7.

embodiment 7, as embodiment 6 preferably, in the time that needs stand up operation, rise to horizontal sextant angle to be 70 while spending, to stop the support body that hoists when support body rises.

the present invention can separate withlower joint derrick 2 upper joint derrick 1 with on-vehicle host 7, form separate type workover rig, when transportation or installation, be connected with on-vehicle host 7 by derrick bracket, in the time not carrying out workover treatment, on-vehicle host 7 can be separated withlower 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 present invention can coordinate with multi-section derrick, derrick can be erected, also can separate with derrick and go again roping and stand up other derricks, also can complete and put operation in cooperation 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, save the maintenance cost to idle well maintenance vehicle, effectively reduce production costs, when installation, at utmost realize mechanization, not only save manpower, reduce cost of production, and can effectively reduce operating risk.Simultaneously, the present invention can realize bydead line anchor 13 thatwire rope 14 is broken to be turned round, and it is more accurate that hook carries reading, at thewire rope 14 ofdead line anchor 13 reserved somes, in the time that the live lineend wire rope 14 ofwire rope 14 damages, broken parts can be clipped, unclampdead line anchor 13, abdicatereserved wire rope 14, can effectively reduce like this consumption of wire rope 14.Adopt the present invention in the time that 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 embodiments of the invention, 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 (8)

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.

7. according to a using method for the separate type workover rig described in claim 2 or 3 or 4 or 6, it is characterized in that in the time that needs carry out hauling operation, control hydraulic control power set and make front arm and rear arm hold lower joint derrick tightly, in the time that needs stand up operation, the piston rod of first controlling bracket raising cylinder stretches out, and then rise by the piston rod supporting frame of bracket raising cylinder, in the time that support body works the angle that rises to needs, stop the support body that hoists, then make front arm and rear arm part unclamp lower joint derrick by controlling hydraulic control power set, continue the support body that hoists, make to slide to ground under derrick base, until lower joint derrick is in operating angle, after the guy wire of lower joint derrick is drawn, the piston rod of controlling extending cylinder stretches out, upper joint derrick is risen to after working depth, post-tensioning is the guy wire of upper joint derrick well, in the time that needs promote operation, first make working rig winch rotate, the load of floating device is delivered on dead line anchor by boom hoist cable, all the time pressing sensing device, the pressure signal that sensor produces, by wire and on-vehicle host socket connection, is realized load and is shown on single-chip microcomputer, in the time that needs carry out folding and unfolding operation, first receive the guy wire of upper joint derrick, then the piston rod of controlling on extending cylinder is regained, upper joint derrick is fallen after rise to lower joint derrick, then receive the guy wire that falls down joint derrick, control hydraulic control power set and make front arm and rear arm hold lower joint derrick tightly, lower joint derrick and support body are close to, then receive the guy wire that falls down joint derrick, finally control the piston rod of bracket raising cylinder and regain, make support body and lower joint derrick and upper joint derrick slowly fall to being back in on-vehicle host.

8. the using method of separate type workover rig according to claim 7, is characterized in that in the time that needs stand up operation, rises to horizontal sextant angle to be 70 while spending, to stop the support body that hoists when support body rises.

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