CN216894294U

CN216894294U - Novel unmanned operation platform of well head

Info

Publication number: CN216894294U
Application number: CN202122934395.0U
Authority: CN
Inventors: 李波; 谷涛; 康向东; 陈龙; 王涛; 骆嘉鹏; 刘志九; 曹勇; 张德全; 余游
Original assignee: Karamay Zhongcheng Petroleum Equipment Research Institute Co ltd
Current assignee: Karamay Zhongcheng Petroleum Equipment Research Institute Co ltd
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2022-07-05
Anticipated expiration: 2031-11-26

Abstract

The utility model relates to the technical field of transportation of oil pipes outside a well, in particular to a novel wellhead unmanned operation platform which comprises a workbench, slips, a centering manipulator, a centering mechanism and a clamp feeding mechanism, wherein the slips capable of holding an oil pipe are arranged in the middle of the workbench. The utility model has reasonable and compact structure, convenient use, good integral rigidity of the steel structure workbench and strong deformation resistance, the slips can fix the oil pipe in the oil well to prevent the oil pipe from shaking, the V-shaped groove on the righting mechanism can ensure that the axis of the suspended oil pipe is basically coincident with the axis of the slips, the centering mechanism can ensure that the lower end of the suspended oil pipe is completely aligned with the upper end of the oil pipe in the oil well, the power tong mechanism sends power tongs to an oil pipe coupling, and the power tong buckles the oil pipe coupling to ensure that the male buckle end and the female buckle end rotate relatively to realize the buckling or buckling. By using the device, the oil pipe can be quickly and stably lifted or placed into an oil well, mechanical automation lifting and placing of the oil pipe is realized, and the device has the characteristics of simplicity and safety in operation, high stability and good centering property.

Description

Novel unmanned operation platform of well head

Technical Field

The utility model relates to the technical field of transportation of oil pipes outside a well, in particular to a novel unmanned operation platform for a well head.

Background

The oil and gas well is subjected to production reduction or production stoppage in the normal production process, and repair or maintenance work, which is called minor repair work, is carried out on the oil and gas well. The basic method of minor repair operation is to take the oil pipe as the main means, take out the original tools and oil pipe in the well, then carry out the project construction according to the construction design, and after the construction purpose is completed, put the maintained tools or pumps into the preset position in the well through the oil pipe to recover the normal production of the oil-water well.

Chinese patent application No.: the utility model patent of CN202010836659.6 discloses a workover wellhead unmanned operation platform, the middle part of the workbench is provided with a flange through which an oil supply pipe passes; the hydraulic tong assembly is used for screwing on and off the oil pipe, the hydraulic tong of the hydraulic tong assembly can move along the flange in the radial direction, and the push pipe assembly is used for pushing the oil pipe away from the workbench. The unmanned operation platform for the workover wellhead has the following problems: firstly, the oil pipe in the oil well cannot be reliably fixed; secondly, the platform is not stable and is easy to deform; thirdly, the alignment of the oil pipe to be installed and the oil pipe in the well is poor, and the oil pipe is easy to misplace.

Disclosure of Invention

The utility model provides a novel wellhead unmanned operation platform, overcomes the defects of the prior art, and can effectively solve the problems that the existing workover import unmanned operation platform cannot reliably fix oil pipes in an oil well, the platform is poor in stability, the centering performance of two oil pipes is poor, and the two oil pipes are easy to misplace.

The technical scheme of the utility model is realized by the following measures: a novel wellhead unmanned operation platform comprises a workbench, slips, a centering manipulator, a centering mechanism and a clamp conveying mechanism, wherein the slips capable of holding an oil pipe are arranged in the middle of the workbench; a righting manipulator used for righting or pushing the oil pipe away from the workbench is hinged to the workbench corresponding to the rear position of the slip; a centering mechanism is hinged on the workbench corresponding to the position between the slip and the centralizing manipulator; a clamp conveying mechanism which can load and unload the oil pipe screw thread is hinged on the workbench corresponding to the left position of the slip.

The following are further optimization or/and improvement of the technical scheme of the utility model:

the clamp feeding mechanism can comprise a rotary frame, a power clamp and a first linear execution mechanism, wherein the rotary frame is hinged on the workbench corresponding to the left position of the slip, the first linear execution mechanism is hinged between the lower part of the left side of the rotary frame and the workbench corresponding to the left position of the rotary frame, and the rotary frame can rotate left and right through the first linear execution mechanism; the upper part of the rotating frame is provided with a power tong capable of screwing and unscrewing an oil pipe screw thread.

The power tongs can be workover suspension power tongs.

The clamp feeding mechanism can also comprise a buffer device and a suspender, the buffer device is arranged on the rotating rack corresponding to the outer side position of the upper end of the power clamp, the suspender is arranged in the middle of the buffer device, and the middle of the lower side of the suspender is hinged with the well repairing suspension power clamp.

The centering mechanism can comprise a centering swing frame, a second linear executing mechanism, a third linear executing mechanism, a left support, a right support, a fourth linear executing mechanism, a left centering tile, a fifth linear executing mechanism and a right centering tile, the centering swing frame is hinged on a workbench corresponding to the position between the slips and the centering manipulator, the second linear executing mechanism and the third linear executing mechanism are hinged on the front side of the upper part of the centering swing frame at the left and right intervals, the lower end of the second linear executing mechanism and the lower end of the third linear executing mechanism are respectively hinged with the corresponding positions of the workbench, and the centering swing frame can rotate back and forth by the second linear executing mechanism and the third linear executing mechanism; the left support and the right support are fixedly mounted at the upper end of the centering swing frame at intervals, a fourth linear actuating mechanism capable of stretching out rightwards is fixedly mounted in the middle of the right side of the left support, a left centering tile is fixedly mounted at the right end of the fourth linear actuating mechanism, a fifth linear actuating mechanism capable of stretching out leftwards is fixedly mounted on the left side of the right support corresponding to the position of the fourth linear actuating mechanism, and a right centering tile is fixedly mounted at the left end of the fifth linear actuating mechanism corresponding to the position of the left centering tile.

The centering mechanism can further comprise a left guide rod seat, a right guide rod seat, a guide rod, a left sliding block and a right sliding block, the left guide rod seat is fixedly mounted on the front side of the left support, the right guide rod seat is fixedly mounted on the front side of the right support, at least one guide rod is arranged between the left guide rod seat and the right guide rod seat at an upper-lower interval, the left sliding block and the right sliding block are arranged on the outer side of the guide rod at a left-right interval, the rear end of the left sliding block is fixedly mounted with the front side of the left centering tile, and the rear end of the right sliding block is fixedly mounted with the front side of the right centering tile.

The righting manipulator comprises a rotary swing frame, a sixth linear executing mechanism and a fork plate, wherein the rotary swing frame is hinged on the workbench corresponding to the rear position of the slip, the sixth linear executing mechanism is hinged between the middle part of the lower end of the rotary swing frame and the workbench corresponding to the front position of the rotary swing frame, and the second executing mechanism can enable the rotary swing frame to rotate back and forth; a fork plate is arranged in the middle of the rear side of the upper end of the rotary swing frame, and a V-shaped groove which is communicated from top to bottom and has a backward opening is arranged at the rear end of the fork plate.

The oil receiving part is arranged on the lower side of the workbench corresponding to the outer side position of the lower part of the slip, the escalator is arranged on the right side of the rear end of the workbench, and the guardrails are arranged on four sides of the upper side of the workbench.

The above-mentioned still can all be equipped with the regulation landing leg that can adjust the workstation height including adjusting landing leg and level (l) ing foot stool, workstation four corners downside, and every is adjusted the landing leg lower extreme and all is equipped with the level (l) ing foot stool.

The utility model has reasonable and compact structure, convenient use, good integral rigidity of the steel structure workbench and strong deformation resistance, the slips can fix the oil pipe in the oil well to prevent the oil pipe from shaking, the V-shaped groove on the righting mechanism can ensure that the axis of the suspended oil pipe is basically coincident with the axis of the slips, the centering mechanism can ensure that the lower end of the suspended oil pipe is completely aligned with the upper end of the oil pipe in the oil well, the power tong mechanism sends power tongs to an oil pipe coupling, and the power tong buckles the oil pipe coupling to ensure that the male buckle end and the female buckle end rotate relatively to realize the buckling or buckling. By using the device, the oil pipe can be quickly and stably lifted or put into an oil well, the mechanical automation lifting and putting of the oil pipe is realized, and the device has the characteristics of simplicity and safety in operation, high stability and good centering property.

Drawings

Fig. 1 is a schematic front view of the preferred embodiment of the present invention.

Fig. 2 is a schematic perspective view of fig. 1.

Fig. 3 is an enlarged perspective view of the clip feeding mechanism shown in fig. 1.

Fig. 4 is an enlarged perspective view of the centering mechanism shown in fig. 1.

Fig. 5 is an enlarged perspective view of the straightening manipulator shown in fig. 1.

The codes in the figures are respectively: the device comprises a workbench, slips, a rotating rack, a first linear actuator, a workover suspension power tong, a buffer device, a suspender, a centering swing frame, a second linear actuator, a third linear actuator, a left support, a right support, a fourth linear actuator, a left centering tile, a fifth linear actuator, a right centering tile, a left guide rod seat, a right guide rod seat, a guide rod, a left slide block, a right slide block, a rotating swing frame, a rotary swing frame, a sixth linear actuator, a fork plate, a V-shaped groove, an oil receiving part, an escalator, a guardrail, an adjusting leg, a supporting leg, a horizontal adjusting foot seat and a horizontal adjusting foot seat, wherein the working table 1, the slips, the rotating rack, the straight actuator, the.

Detailed Description

The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention.

In the present invention, for convenience of description, the description of the relative positional relationship of the components is described according to the layout pattern of fig. 1 of the specification, such as: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of the drawings of the specification.

The utility model is further described with reference to the following examples and figures:

as shown in attached figures 1, 2, 3, 4 and 5, the novel wellhead unmanned operation platform comprises a workbench 1, slips 2, a centering manipulator, a centering mechanism and a clamp feeding mechanism, wherein the slips 2 capable of holding an oil pipe are arranged in the middle of the workbench 1; a righting manipulator used for righting or pushing the oil pipe away from the workbench 1 is hinged on the workbench 1 corresponding to the rear position of the slip 2; a centering mechanism is hinged on the workbench 1 corresponding to the position between the slip 2 and the righting manipulator; a clamp feeding mechanism which can load and unload the oil pipe screw thread is hinged on the workbench 1 corresponding to the left position of the slip 2.

According to the requirement, the workbench 1 is a double-layer steel structure welding workbench 1, supporting beams with different structures can be arranged on the workbench 1 according to the position and shape of each executing mechanism, each supporting beam is welded on a main frame of the workbench 1, the structure has high strength, good integral rigidity and strong deformation resistance and can well bear power load, in addition, a steel grid plate is fixedly arranged on the upper side of the workbench 1 under the condition that the normal work of each executing mechanism is not influenced, so that an operator can conveniently stand on the workbench 1 for overhauling or other operations, residual oil in an oil pipe can conveniently flow down along the steel grid plate and cannot be caught on the surface of the workbench 1, dust guard plates are arranged on four side surfaces of the workbench 1, and an overhauling window can be arranged on the dust guard plates for convenient overhauling and observation; the slips 2 may be selected from prior art pneumatic slips or hydraulic slips, both of which require power to be introduced from the workover rig, but pneumatic slips are commonly used for oil well operations and are used to clamp a drill pipe or casing to a rotary table.

Can do further optimization or/and improvement to above-mentioned novel unmanned operation platform of well head according to actual need:

as shown in fig. 1, 2 and 3, the clamp feeding mechanism comprises a rotating frame 3, a power clamp and a first linear actuator 4, the rotating frame 3 is hinged on the workbench 1 corresponding to the left position of the slip 2, the first linear actuator 4 is hinged between the lower part of the left side of the rotating frame 3 and the workbench 1 corresponding to the left position of the rotating frame 3, and the first linear actuator 4 can enable the rotating frame 3 to rotate left and right; the upper part of the rotating frame 3 is provided with a power tong which can load and unload the oil pipe screw thread. According to the requirement, the clamp feeding mechanism can be positioned on the upper layer of the workbench 1, a supporting plate for mounting the clamp feeding mechanism is arranged at the corresponding position on the workbench 1, the rotating frame 3 is also of a steel structure and can rotate along the hinge axis of the rotating frame and the workbench 1, a first linear actuating mechanism 4 is arranged for accurately controlling the rotating angle and the position of the rotating frame 3, the first linear actuating mechanism 4 can be an air cylinder or a hydraulic cylinder in the prior art, and the hydraulic cylinder can be selected in consideration of the dead weight of the rotating frame 3 and the load needing to be carried, which is mainly because the hydraulic cylinder with the same volume has larger power; the power tongs are a common hydraulic power tong in the prior art and comprise a main tong and a back-up tong, wherein the back-up tong clamps a tubing coupling loose joint during working, and the main tong clamps a tubing and rotates clockwise or anticlockwise, so that the operation of screwing on and off the tubing is realized.

As shown in fig. 1, 2 and 3, the power tong is a workover suspension power tong 5. The arrangement mainly considers that the workover hanging power tong 5 is more suitable for being hung in the air for use, and has the characteristics of simple structure, convenient operation, reliable performance and large output torque.

As shown in the attached figures 1, 2 and 3, the tong feeding mechanism further comprises a buffer device 6 and a suspender 7, the buffer device 6 is arranged on the rotating frame 3 corresponding to the outer side position of the upper end of the power tong, the suspender 7 is arranged in the middle of the buffer device 6, and the middle of the lower side of the suspender 7 is hinged with the workover suspension power tong 5. According to the requirement, in order to enable the workover suspension power tong 5 to stably act and reduce impact vibration received in the process of screwing on and screwing off, the buffer device 6 can be an air spring in the prior art or a mechanical spring with a guide post in the middle, and considering the defects of large volume, short service life and high cost of the air spring, the buffer device 6 consisting of the mechanical spring and the guide post is selected in the embodiment, in order to achieve better buffer effect, two guide posts are arranged on the right side of the upper end of the tong conveying mechanism at intervals from front to back, a mechanical spring is sleeved outside each guide post, a suspender 7 is arranged on the upper side of the mechanical spring, the front end and the rear end of the suspender 7 are respectively sleeved outside the corresponding guide posts, the middle part of the suspender 7 is hinged with the upper end of the workover suspension power tong 5, and the workover suspension power tong 5 is always vertical under the action of self weight.

As shown in fig. 1, 2 and 4, the centering mechanism comprises a centering swing frame 8, a second linear actuator 9, a third linear actuator 10, a left support 11, a right support 12, a fourth linear actuator 13, a left centering tile 14, a fifth linear actuator 15 and a right centering tile 16, the centering swing frame 8 is hinged on the workbench 1 corresponding to the position between the slip 2 and the centering manipulator, the second linear actuator 9 and the third linear actuator 10 are hinged on the left and right sides of the front side of the upper part of the centering swing frame 8 at intervals, the lower end of the second linear actuator 9 and the lower end of the third linear actuator 10 are hinged with the corresponding position of the workbench 1 respectively, and the second linear actuator 9 and the third linear actuator 10 can enable the centering swing frame 8 to rotate back and forth; the left support 11 and the right support 12 are fixedly installed at the left end and the right end of the centering swing frame 8 at intervals, a fourth linear actuator 13 capable of stretching out rightwards is fixedly installed in the middle of the right side of the left support 11, a left centering tile 14 is fixedly installed at the right end of the fourth linear actuator 13, a fifth linear actuator 15 capable of stretching out leftwards is fixedly installed on the left side of the right support 12 corresponding to the position of the fourth linear actuator 13, and a right centering tile 16 is fixedly installed at the left end of the fifth linear actuator 15 corresponding to the position of the left centering tile 14.

According to the requirement, considering that the operation flow of the device (the centering manipulator acts before the centering mechanism) and the centering mechanism is only used in the oil pipe discharging process, the rotation or folding of the centering manipulator cannot be influenced by the position and the rotation of the centering swing frame 8, so that a supporting beam for installing the centering swing frame 8 is arranged on the workbench 1 between the centering manipulator and the slip 2, the centering swing frame 8 is folded and retracted into the workbench 1 and then is positioned below the centering manipulator, and the action of the centering manipulator cannot be influenced by the bulge part; the centering swing frame 8 can rotate along the hinged axis of the centering swing frame 8 and the workbench 1, in order to accurately control the rotation angle and position of the centering swing frame 8 and avoid the slips 2, a second linear actuator 9 and a third linear actuator 10 are arranged at left and right intervals, the second linear actuator 9 and the third linear actuator 10 are hydraulic cylinders or air cylinders in the prior art, and the hydraulic cylinders are selected in consideration of the dead weight of the centering swing frame 8 and the carried load, which is mainly because the power of the hydraulic cylinders with the same volume is larger; the left centering tile 14 and the right centering tile 16 can form a cylindrical centering cylinder, can reliably hold the upper oil pipe and the lower oil pipe, enables the collars of the upper oil pipe and the lower oil pipe to be aligned to prepare for the upper buckle of the power tong, and can be provided with a bell mouth-shaped guide port at the upper end of the centering cylinder; the displacement of the left centering tile 14 and the displacement of the right centering tile 16 are controlled by the fourth linear actuator 13 and the fifth linear actuator 15 respectively, the left centering tile 14 and the right centering tile 16 can move simultaneously and independently, and the centering adjustment effect is better and more accurate; the fourth linear actuator 13 and the fifth linear actuator 15 are both hydraulic cylinders or air cylinders in the prior art, and in addition, because the power required by centering adjustment is not large, the air cylinders can be selected by the fourth linear actuator 13 and the fifth linear actuator 15, and compared with the hydraulic cylinders, the air cylinders can respond faster and work more stably.

As shown in fig. 1, 2 and 4, the centering mechanism further includes a left guide rod seat 17, a right guide rod seat 18, a guide rod 19, a left slider 20 and a right slider 21, the left guide rod seat 17 is fixedly installed on the front side of the left bracket 11, the right guide rod seat 18 is fixedly installed on the front side of the right bracket 12, at least one guide rod 19 is arranged between the left guide rod seat 17 and the right guide rod seat 18 at an upper and lower interval, the left slider 20 and the right slider 21 are arranged on the outer side of the guide rod 19 at a left and right interval, the rear end of the left slider 20 is fixedly installed with the front side of the left centering tile 14, and the rear end of the right slider 21 is fixedly installed with the front side of the right centering tile 16. By means of the arrangement, a support can be added to the left centering tile 14 and the right centering tile 16 which are suspended in the air, and the centering accuracy of the left centering tile 14 and the right centering tile 16 is prevented from being influenced by deformation of the extending ends of the fourth linear actuator 13 and the fifth linear actuator 15.

As shown in fig. 1, 2 and 5, the righting manipulator comprises a rotary swing frame 22, a sixth linear actuator 23 and a fork plate 24, the rotary swing frame 22 is hinged on the workbench 1 corresponding to the rear position of the slip 2, the sixth linear actuator 23 is hinged between the middle part of the lower end of the rotary swing frame 22 and the workbench 1 corresponding to the front position of the rotary swing frame 22, and the second actuator can enable the rotary swing frame 22 to rotate back and forth; a fork plate 24 is arranged in the middle of the rear side of the upper end of the rotary swing frame 22, and a V-shaped groove 25 which is through from top to bottom and has a backward opening is arranged at the rear end of the fork plate 24. According to the requirements, in order to facilitate transportation of the device and avoid interference of a straightening manipulator with other mechanisms in the operation process, the straightening manipulator can be installed on the lower layer of the workbench 1 and can be folded and retracted into the workbench 1, a supporting beam capable of installing the straightening manipulator is further arranged on the workbench 1, the rotary swing frame 22 is a steel framework and has good stability, the rotary swing frame 22 can rotate along the hinge axis of the rotary swing frame 22 and the workbench 1, a sixth linear actuator 23 is arranged for accurately controlling the rotation angle and the position of the rotary swing frame 22, the sixth linear actuator 23 can be an air cylinder or a hydraulic cylinder in the prior art, the hydraulic cylinder can be selected according to the self weight of the rotary rack 3 and the weight of an oil pipe needing to be pushed, and the hydraulic cylinder with the same volume is high in power; the V-shaped groove 25 on the fork plate 24 has good stability, and can reliably support the lower end of the oil pipe as long as the position is set, and because the V-shaped groove 25 has centering property, the axis of the supported oil pipe can be basically superposed with the axis of the slip 2, so that a foundation is laid for the work of a centering mechanism; in addition, stress concentration usually occurs at sharp corners of the bottom of the V-shaped groove 25, and the bottom of the V-shaped groove 25 may be rounded or provided with relief grooves in order to prevent the V-shaped groove 25 from cracking.

As shown in the attached figures 1 and 2, the multifunctional clamping shoe further comprises an oil receiving part 26, an escalator 27 and a guardrail 28, the oil receiving part 26 is arranged at the lower side of the workbench 1 corresponding to the outer side position of the lower part of the clamping shoe 2, the escalator 27 is arranged at the right side of the rear end of the workbench 1, and the guardrails 28 are arranged on the four sides of the upper side of the workbench 1. By the arrangement, the oil receiving part 26 can collect oil and water dropped on the oil collecting pipe or oil and water overflowing from a well mouth, the oil receiving part 26 is a funnel-shaped or other sunken groove body, and the bottom of the oil receiving part 26 can be further provided with an oil drain valve so as to drain the oil and water collected by the oil receiving part 26 and prevent the oil and water from polluting the well mouth environment; the escalator 27 is convenient for maintenance personnel to maintain the device and convenient for the working personnel to climb the platform to check the condition in the working process, and the escalator 27 can be a fixed escalator 27 or a folding escalator 27; the guardrail 28 can play the guard action, and the structure, height and the position of guardrail 28 all can set up according to the work needs.

As shown in the attached figures 1 and 2, the adjustable workbench further comprises adjusting support legs 29 and horizontal adjusting foot seats 30, the adjusting support legs 29 capable of adjusting the height of the workbench 1 are arranged on the lower sides of the four corners of the workbench 1, and the horizontal adjusting foot seats 30 are arranged at the lower ends of the adjusting support legs 29. Through the arrangement, the adjusting supporting legs 29 are used for adjusting the overall height of the workbench 1 and can adapt to different oil well sites, and the adjusting supporting legs 29 can be common rod pieces with adjustable lengths, such as hydraulic rods, threaded rods and rod sleeves which are in threaded connection with each other, and the like according to requirements; horizontal adjustment foot stool 30 is the horizontal adjustment foot stool among the prior art, and the specific topography that is used for according to every landing leg department carries out local fine setting commonly and makes every landing leg of workstation 1 can both reliably contact with ground, prevents that operation in-process workstation 1 from rocking.

The use process of the best embodiment of the utility model is as follows:

when the oil pipe is lifted up by using the hydraulic elevator, the hydraulic elevator of the workover rig is firstly lowered to the lower part of an oil pipe coupling, the elevator is buckled on the oil pipe and is locked, then the pneumatic slips 2 on the workbench 1 are opened to loosen the oil pipe, the elevator is lifted up until the next coupling is lifted out of an oil well to a proper position, and the pneumatic slips 2 are closed and are used for fixing the oil pipe below; the hydraulic power tongs are moved to a wellhead by the rotary action of the tong feeding mechanism, a main tong and a back-up tong of the hydraulic power tongs respectively clamp an upper oil pipe and a lower oil pipe, the main tong rotates to release screw threads in the upper oil pipe coupling and the lower oil pipe coupling, and the hydraulic power tongs are driven to return to an initial position by the action of the tong feeding mechanism; continuously lifting the elevator to separate the upper oil pipe from the lower oil pipe, rotating the centering manipulator to enable the V-shaped groove 25 to support the lower end of the oil pipe, continuously rotating the centering manipulator to push the lower end of the oil pipe away from the workbench 1 and send the oil pipe onto an oil pipe conveyor, and returning the centering manipulator to the initial position; then lowering the elevator to convey the oil pipe to the pipe bent frame through the oil pipe conveyor, stopping when the elevator is lowered to the oil pipe and laid on the conveyor, then opening the elevator, and then lifting the elevator; repeating the above actions until all the oil pipes in the oil well are taken out.

When the oil pipe is placed by using the oil pipe placing device, the oil pipe is conveyed to a wellhead by a conveyor through the oil pipe, the elevator is placed by the workover rig, the upper end of the oil pipe is buckled and lifted, the elevator rotates to the rear end of the workbench 1 after lifting for a certain height to prepare for receiving the oil pipe, when the oil pipe is supported by the V-shaped groove 25, the elevator continues to lift the oil pipe, and meanwhile, the elevator supports the oil pipe side by the V-shaped groove 25 while rotating back (the lower end of the oil pipe is prevented from shaking); when the oil pipe is basically aligned with the previous oil pipe coupling, the centering mechanism rotates to a wellhead and simultaneously embraces the upper oil pipe coupling and the lower oil pipe coupling from the left side and the right side by using the left centering tile 14 and the right centering tile 16 to align the oil pipe couplings, at the moment, the centering manipulator returns to the initial position, the elevator is continuously lowered until the couplings of the two oil pipes can be butted, and the centering mechanism loosens the oil pipes and returns to the initial position; the hydraulic power tongs are sent to a wellhead by the action of the tong sending mechanism, a main tong and a back-up tong of the hydraulic power tongs respectively clamp an upper oil pipe and a lower oil pipe, the main tong rotates to buckle screw threads in the upper oil pipe coupling and the lower oil pipe coupling, then the hydraulic power tongs returns, a pneumatic slip of the workover rig is opened, an elevator is lowered to a proper position, the pneumatic slip of the workover rig is closed, the elevator is opened, the elevator is lifted up, and the actions are repeated, so that all oil pipes in the oil well are completely lowered.

Therefore, the oil pipe lifting and releasing device can efficiently and reliably complete the oil pipe lifting and releasing work during minor workover of an oil well, realizes mechanical automation of oil pipe lifting and releasing, and has the characteristics of simplicity and safety in operation, high stability and good centering property. In the whole operation process, the device is relatively fixed in position, the condition that the position of equipment needs to be adjusted every time of well repair is avoided, the repeatability of operation is good, and the working efficiency is high during minor repair operation.

The above technical features constitute the best embodiment of the present invention, which has strong adaptability and best implementation effect, and unnecessary technical features can be increased or decreased according to actual needs to meet the requirements of different situations.

Claims

1. A novel wellhead unmanned operation platform is characterized by comprising a workbench, slips, a centering mechanical arm, a centering mechanism and a clamp conveying mechanism, wherein the slips capable of holding an oil pipe are arranged in the middle of the workbench; a righting manipulator used for righting or pushing the oil pipe away from the workbench is hinged to the workbench corresponding to the rear position of the slip; a centering mechanism is hinged on the workbench corresponding to the position between the slip and the centralizing manipulator; a clamp conveying mechanism which can load and unload the oil pipe screw thread is hinged on the workbench corresponding to the left position of the slip.

2. The novel wellhead unmanned operation platform as claimed in claim 1, wherein the clamp feeding mechanism comprises a rotary frame, a power clamp and a first linear actuator, the rotary frame is hinged on the workbench corresponding to the left position of the slip, the first linear actuator is hinged between the lower part of the left side of the rotary frame and the workbench corresponding to the left position of the rotary frame, and the first linear actuator can enable the rotary frame to rotate left and right; the upper part of the rotating frame is provided with a power tong capable of screwing and unscrewing an oil pipe screw thread.

3. A novel unmanned wellhead operation platform as claimed in claim 2, wherein the power tong is a workover suspension power tong.

4. A novel unmanned wellhead operation platform as claimed in claim 3, wherein the tong feeding mechanism further comprises a buffer device and a hanger rod, the buffer device is arranged on the rotating frame corresponding to the outer side position of the upper end of the power tong, the hanger rod is arranged in the middle of the buffer device, and the power tong for repairing the well is hinged in the middle of the lower side of the hanger rod.

5. A novel wellhead unmanned operation platform according to claim 1, 2, 3 or 4, wherein the centering mechanism comprises a centering swing frame, a second linear actuator, a third linear actuator, a left support, a right support, a fourth linear actuator, a left centering tile, a fifth linear actuator and a right centering tile, the centering swing frame is hinged on a workbench corresponding to the position between the slips and the centering manipulator, the second linear actuator and the third linear actuator are hinged on the front side of the upper portion of the centering swing frame at left and right intervals, the lower ends of the second linear actuator and the third linear actuator are hinged with the corresponding position of the workbench respectively, and the second linear actuator and the third linear actuator can enable the centering swing frame to rotate back and forth; the left support and the right support are fixedly mounted at the upper end of the centering swing frame at intervals, a fourth linear actuating mechanism capable of stretching out rightwards is fixedly mounted in the middle of the right side of the left support, a left centering tile is fixedly mounted at the right end of the fourth linear actuating mechanism, a fifth linear actuating mechanism capable of stretching out leftwards is fixedly mounted on the left side of the right support corresponding to the position of the fourth linear actuating mechanism, and a right centering tile is fixedly mounted at the left end of the fifth linear actuating mechanism corresponding to the position of the left centering tile.

6. A novel unmanned wellhead operation platform as claimed in claim 5, wherein the centering mechanism further comprises a left guide rod seat, a right guide rod seat, a guide rod, a left slider and a right slider, the left guide rod seat is fixedly mounted on the front side of the left support, the right guide rod seat is fixedly mounted on the front side of the right support, at least one guide rod is arranged between the left guide rod seat and the right guide rod seat at an interval from top to bottom, the left slider and the right slider are arranged on the outer side of the guide rod at an interval from left to right, the rear end of the left slider is fixedly mounted with the front side of the left centering tile, and the rear end of the right slider is fixedly mounted with the front side of the right centering tile.

7. A novel wellhead unmanned working platform according to claim 1, 2, 3, 4 or 6, characterized in that the righting manipulator comprises a rotary swing frame, a sixth linear actuator and a fork plate, the rotary swing frame is hinged on the workbench corresponding to the rear position of the slip, the sixth linear actuator is hinged between the middle part of the lower end of the rotary swing frame and the workbench corresponding to the front position of the rotary swing frame, and the second actuator can enable the rotary swing frame to rotate back and forth; a fork plate is arranged in the middle of the rear side of the upper end of the rotary swing frame, and a V-shaped groove which is communicated from top to bottom and has a backward opening is arranged at the rear end of the fork plate.

8. A novel wellhead unmanned working platform as claimed in claim 5, wherein the centering manipulator comprises a rotary swing frame, a sixth linear actuator and a fork plate, the rotary swing frame is hinged to the workbench corresponding to the rear position of the slip, the sixth linear actuator is hinged between the middle part of the lower end of the rotary swing frame and the workbench corresponding to the front position of the rotary swing frame, and the second actuator can enable the rotary swing frame to rotate back and forth; a fork plate is arranged in the middle of the rear side of the upper end of the rotary swing frame, and a V-shaped groove which is communicated from top to bottom and has a backward opening is arranged at the rear end of the fork plate.

9. A novel wellhead unmanned working platform according to claim 1, 2, 4, 6 or 8 and is characterized by further comprising an oil receiving portion, a staircase and guardrails, wherein the oil receiving portion is arranged on the lower side of the working platform corresponding to the outer side position of the lower portion of the slip, the staircase is arranged on the right side of the rear end of the working platform, and the guardrails are arranged on four sides of the upper side of the working platform.

10. A novel unmanned aerial vehicle platform at a wellhead as claimed in claim 1, 2, 4, 6 or 8, further comprising adjusting legs and horizontal adjusting footstands, wherein the adjusting legs capable of adjusting the height of the workbench are arranged on the lower sides of four corners of the workbench, and the horizontal adjusting footstands are arranged at the lower ends of each adjusting leg.