Well servicing top drive

Abstract

The purpose of the present application is to propose a well repair top drive, solve the problem that the traditional well repair equipment is greatly affected by the well site environment, is not easy to implement well repair, and the efficiency of the well repair process is low, and the problem that the bending pipe is easy to cause during the unblocking process. In the present application, the driving force source of the well repair top drive adopts a magnetic resistance motor, discarding the hydraulic motor and hydraulic station equipment in the traditional equipment. Under the condition of meeting the heavy load frequent starting, the small size, flexible and convenient installation are realized, the conversion is convenient, the operation machine has the function of overhaul, and it is also suitable for small repair well site. At the same time, due to the small size and flexible installation, the requirement for well site environment is small. On the other hand, the present application introduces the function of repeatedly pulling and lifting of the active drive, so that the well repair process depends on the repeated pulling and lifting for unblocking, which is more efficient and the effect is obvious. Furthermore, the self-driven lifting arm of the present application can conveniently realize the posture turning of the motor, and the lifting and installation of the drill pipe series are convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to a tool device for oil well repair, in particular to a well repair top drive. BACKGROUND

[0002] Well repair is short for repairing oil wells, and its purpose is to restore the production capacity of the well and remove the downhole fault.

[0003] On the one hand, as the oilfield development continues to deepen, the downhole conditions become increasingly complex, and the implementation environment to be considered in the well repair operation is also increasingly complex. For example, low-lying well earth filling requirements; for wells near sensitive areas, roads need to be closed, factory buildings and high-voltage lines need to be removed. As a relatively common phenomenon, part of the wells are located in the living area, sensitive area, and due to the limited equipment conditions of the well site, these wells cannot be processed in time and will be accumulated for a long time. Delaying repair. In fact, as the well density of oilfield development increases and the pace of urban development accelerates, subsequent well sites will increase year by year. It is necessary to develop a device that is less affected by the well site environment, can realize rapid transportation and installation, and can take into account large and small well repair operations.

[0004] On the other hand, in the actual operation of oil well equipment, due to unreasonable operation or downhole reasons, the downhole string and downhole tool will often be stuck in the casing, and the process of making it recover from the stuck state is called unblocking. The unblocking method includes repeated pulling, that is, repeated pulling under the load of the original well string tension, so that the sand falls off and loosens, thereby achieving unblocking. However, the traditional unblocking method uses a lifting tool to lift the well repair equipment to achieve repeated pulling. This method requires a large lifting device or relies on well site lifting tools, and the use range is still limited. On the other hand, the well repair top drive is prone to deviation from the well center line during lifting due to lifting tool errors, lifting rope shaking and other reasons, causing the pipe string to be bent by horizontal pressure and further causing frequent sticking. On the other hand, the traditional repeated pulling can only provide upward force, and cannot provide driving force when lowering. It can only rely on gravity self-driving. In the case of relying on gravity, the phenomenon of sticking down is encountered, and the unblocking efficiency is low, which requires repeated attempts. SUMMARY

[0005] In view of the above problems, the purpose of the present application is to provide a well repair top drive to solve the problem that the traditional well repair equipment is greatly affected by the well site environment, is not easy to implement well repair, and has low unblocking efficiency and easy bending pipe during the well repair process.

[0006] The technical solution includes an electric motor capable of heavy-load and frequent starts, a reduction mechanism connected to the electric motor, and booms located on both sides of the electric motor. One end of each boom is connected to a portion formed by the outer wall of the electric motor or reduction mechanism, and the other end of each boom is connected to the lower end of a lifting frame. It also includes a pipe-punching mechanism detachably connected to the output shaft of the reduction mechanism, and a self-driven lifting arm. The self-driven lifting arm includes an electric power source and a drive arm connected to the electric power source. One end of each drive arm is fixedly connected to the outer wall of the electric motor or reduction mechanism, and the connection between each boom and the outer wall of the electric motor or reduction mechanism is pivotally connected. Each drive arm is pulled by the electric power source, generating a deflection torque around the pivotal connection between the boom and the electric motor or reduction mechanism, allowing the electric motor and reduction mechanism to be controlled to rotate. Furthermore, it includes a slide rail located on at least one side of the electric motor, with a sliding assembly between the electric motor and the slide rail, forming a structure where the electric motor can slide along the slide rail.

[0007] In the above or some embodiments, the sliding assembly includes a slide block that slides with the slide rail, and a connecting seat that is detachably and fixedly connected to the slide block. The other end of the connecting seat is located at the connection portion formed by each boom and the outer wall of the motor or reduction mechanism, and is coaxially pivotally connected to the pivot connection position there, forming a structure in which the motor rotates and flips around the connecting seat there.

[0008] In the above or some embodiments, a traction belt for pulling and fixing the sliding seat is also included. The traction belt has a ring structure and is driven by traction power to form a structure in which the sliding seat is pulled up and down under the traction of the traction belt.

[0009] In the above or some embodiments, the side of the slide rail is provided with a concave long groove for installing the traction belt, the traction belt is embedded in the long groove, and one end of the slide rail is provided with a guide wheel, which serves to tension the traction belt.

[0010] In the above or some embodiments, the slide block is provided with a protrusion that fits into the long groove. The protrusion slides in cooperation with the inner side of the long groove. It also includes a through hole located at the protrusion for the traction belt to pass through. The traction belt and the slide block are detachably fixedly connected by bolts.

[0011] In the above or some embodiments, the traction power includes a traction motor and a heavy-duty double-headed worm gear reducer that is connected to the traction motor. The output shaft of the heavy-duty double-headed worm gear reducer drives the drive wheel located above the slide rail via gear transmission. The traction belt and the drive wheel form a belt drive structure.

[0012] In the above or some embodiments, further comprising a crossbeam at the upper end of the slide rail for fixing and mounting the heavy-load double-head turbine worm reducer connected with the traction motor in transmission, a transmission shaft fixedly mounted on one side of the crossbeam through a bearing seat, and a driving wheel fixedly mounted on the crossbeam at a position through a wheel seat.

[0013] In the present scheme, the well repair top drive power source adopts a magnetic resistance motor, discarding the hydraulic motor and hydraulic station equipment in the traditional equipment, and under the condition of meeting the heavy load and frequent starting, the small volume and flexible installation are realized, the conversion is convenient, the operation tool is provided with the overhaul function, and the well site is also suitable for the minor repair well site.

[0014] Drawings

[0015] Figure 1 It is a structural schematic diagram of an embodiment of the present application.

[0016] Figure 2 It is a schematic diagram of the three-dimensional structure of the present application with double-sided slide rails 7.

[0017] Figure 3 It is a front view based on an embodiment of the present application.

[0018] Figure 4 It is a front view based on an embodiment of the present application. Figure 3 It is a side view of the embodiment. DETAILED DESCRIPTION

[0019] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0020] In the description of the present application, the meaning of multiple is two or more than two, unless otherwise specifically limited.

[0021] The well repair top drive comprises a power mechanism, a speed reduction mechanism 2, a flushing pipe mechanism 5, a hoisting mechanism, and an auxiliary lifting mechanism.

[0022] The power mechanism adopts a high-power reluctance motor 1 that can realize heavy load and frequent starting, the lower end of the motor 1 is connected to the speed reduction mechanism 2, the speed reduction mechanism 2 adopts a heavy load reducer including but not limited to a planetary reducer, etc., the lower end output shaft of the reducer is provided with a connecting end for connecting the impact pipe mechanism 5, and the connecting end is detachably fixedly connected with the impact pipe mechanism 5.

[0023] The lifting mechanism includes rod-shaped lifting arms 3 located on both sides of the motor 1, one end of each of the lifting arms 3 is connected with a part formed by the outer wall of the motor 1 or the speed reduction mechanism 2, and the other end of each of the lifting arms 3 is connected with the lower end of a lifting frame 4; specifically, the connection part of the speed reduction mechanism 2 and the motor 1 forms an end face for the lifting arms 3, a lifting rod 2.1 is extended at the end face, the end of the lifting rod 2.1 is pivotally connected with one end of the lifting arm 3, the lifting frame 4 is a triangular frame structure, the lower end of the lifting frame 4 is fixedly connected or pivotally connected with the lifting arm 3, and the tip of the lifting frame 4 is upwardly arranged to form a structure convenient for lifting. The pivot connection of the lifting rod 2.1 and the lifting arm 3 realizes a structure in which the motor can be turned over, and the purpose of turning over the motor is to realize the series connection of the impact pipe and the drill pipe; the self-driven lifting arm 6 for specifically realizing the turning over of the motor 1 is further included, the self-driven lifting arm 6 includes an electric power source 6.1 including but not limited to an electric push rod, in order to facilitate the electric push rod to drive the motor 1, an inclined angle is formed between the electric push rod and the vertical direction, a driving arm 6.2 connected with the electric power source 6.1 is further included, the driving arm 6.2 is a block-shaped structure, the driving arm 6.2 is fixedly installed at the position of the speed reduction mechanism 2, one end of the driving arm 6.2 is hingedly connected with the end of the electric push rod, and the other end of the driving arm 6.2 is located below the lifting rod 2.1 or is integrated with the lifting rod 2.1. When the electric push rod acts, the hinge of the driving arm 6.2 is located at the pivot connection part of the lifting arm 3 to form a turning joint, the motor 1 can be turned over by 0-90°, and when the motor 1 is turned over by 90°, the shaft of the motor 1 is in a horizontal state.

[0024] In order to realize the repeated lifting in the workover process, an auxiliary lifting mechanism is further included, specifically including a slide rail 7 located at one side of the motor 1, and the motor 1 and the slide rail 7 are connected through a sliding assembly to realize the up-down action structure along the slide rail 7. In specific embodiments, the slide rail 7 can be provided with one or two groups, and as a preferred solution, the slide rail 7 can be provided with two groups, and the two groups of slide rail 7 components are symmetrically located on both sides of the motor 1. When the slide rail 7 components are synchronously driven, the vertical state of the pipe string and the drill pipe can be maintained to a greater extent, thereby avoiding the bending problem caused by uneven stress during repeated lifting. A sliding sleeve 8 is arranged between the motor 1 and the slide rail 7. In the above or some embodiments, the sliding sleeve 8 includes a sliding seat 8.1 which is in sliding cooperation with the slide rail 7, and further includes a connecting seat 8.2 which is detachably fixedly connected with the sliding seat 8.1. The other end of the connecting seat 8.2 is located at the connecting part formed by the outer wall of the motor 1 or the reduction mechanism 2 and the respective hanging arm 3, and is coaxially pivotally connected with the pivot connection position thereof, thereby forming the structure that the motor 1 rotates around the connecting seat 8.2. The connecting seat 8.2 has a concentric sleeve structure including a female shaft and a male shaft, the female shaft and the male shaft are sleeved and in sliding cooperation, and a jacking screw is arranged on the female shaft to limit the length of the female shaft and the male shaft formed by the jacking screw, so as to adjust the distance between the slide rail 7 and the motor 1.

[0025] In the above or some embodiments, in order to realize the repeated lifting of the motor 1 up and down, a traction belt 8.3 for traction and fixed connection with the sliding seat 8.1 is further included. The traction belt 8.3 has a ring structure, and the traction belt 8.3 is driven by a traction power 9. In order to facilitate the driving and installation of the sliding seat 8.1 and realize the effect of fully stable combination of the sliding seat 8.1 and the slide rail 7, in the above or some embodiments, the side surface of the slide rail 7 is provided with an inner recessed long groove 7.1 for installing the traction belt 8.3. The traction belt 8.3 is embedded in the long groove 7.1, and one end of the slide rail 7 is provided with a guide wheel which serves as a structure for tensioning the traction belt 8.3. The sliding seat 8.1 is provided with a protrusion 8.4 which is embedded with the long groove 7.1. The protrusion 8.4 is in sliding cooperation with the inner side surface of the long groove 7.1, and further includes a through hole 8.5 at the protrusion 8.4 for the traction belt 8.3 to pass through. The traction belt 8.3 and the sliding seat 8.1 are detachably fixedly connected through bolts.

[0026] In the above or some embodiments, in order to realize the synchronous operation of the traction belt 8.3, the traction power 9 includes a traction motor 9.1 and a heavy-duty double-head turbine worm reducer 9.2 in transmission connection with the traction motor 9.1, an output shaft of the heavy-duty double-head turbine worm reducer 9.2 drives a driving wheel 9.3 above the slide rail 7 through gear transmission, and the traction belt 8.3 forms a belt transmission structure with the driving wheel 9.3. Further, a crossbeam 9.5 for fixedly installing the traction motor 9.1 and the heavy-duty double-head turbine worm reducer 9.2 in transmission connection with the traction motor 9.1, a transmission shaft 9.4, and the driving wheel 9.3 are arranged at the upper end of the slide rail 7, the transmission shaft 9.4 is fixedly installed on one side of the crossbeam 9.5 through a bearing seat 9.6, and the driving wheel 9.3 is fixedly installed at a position of the crossbeam 9.5 through a wheel seat.

[0027] In the scheme, the well repair top drive power source adopts a magnetic resistance motor, and the hydraulic motor and hydraulic station device in the traditional equipment are abandoned. Under the condition of meeting the heavy load and frequent starting, the volume is small, the installation is flexible and convenient, the transfer is convenient, the operation machine has the function of overhaul, and it is also suitable for small repair well site. At the same time, due to the small volume and flexible installation, the requirement for the well site environment is small. On the other hand, the scheme introduces the active driving repeated pulling function, so that the well repair process depends on the repeated pulling for the release of the stuck pipe, which is more efficient and has obvious effect. Furthermore, the self-driven lifting arm of the scheme can conveniently realize the posture turning of the motor, and the lifting and installation of the drill pipe string are convenient.

Claims

1. A workover top drive, comprising a motor (1) capable of heavy load start and frequent start, a reduction mechanism (2) in driving connection with the motor (1), and a cantilever arm (3) on both sides of the motor (1), one end of each of the cantilever arms (3) being connected to a part formed by the outer wall of the motor (1) or the reduction mechanism (2), the other end of each of the cantilever arms (3) being connected to the lower end of a lifting frame (4), and a washpipe mechanism (5) in detachable and movable connection with the output shaft of the reduction mechanism (2), characterized in that, Also include self-driving hoist arm (6), the self-driving hoiston arm (6) includes electric power source (6.1), also include the drive arm (6.2) connected with the electric power source (6.1), each drive arm (6.2) one end is fixedly connected to the outer wall of motor (1) or reduction mechanism (2), and each hoist arm (3) and the connecting part formed by the outer wall of motor (1) or reduction mechanism (2) is pivotally connected, each drive arm (6.2) is pulled by the electric power source (6.1), and the deflection torque around the pivotally connected part formed by the hoist arm (3) and the motor (1) or reduction mechanism (2) is formed, so that the motor (1), reduction mechanism (2) can be controlled to overturn;Also include the slide rail (7) on at least one side of the motor (1), the slide assembly (8) is arranged between the motor (1) and the slide rail (7), and the structure that the motor (1) can slide along the slide rail (7) is formed.

2. The workover top drive of claim 1, wherein, The slide assembly (8) includes a sliding seat (8.1) that is in sliding fit with the slide rail (7), and further includes a connecting seat (8.2) that is detachably fixedly connected with the sliding seat (8.1), one end of the connecting seat (8.2) is located at the connecting part formed by each hoist arm (3) and the outer wall of motor (1) or reduction mechanism (2), and is coaxially pivotally connected with the pivotally connected position, forming the structure that the motor (1) turns and overturns around the connecting seat (8.2).

3. The workover top drive of claim 2, wherein, Also include the traction belt (8.3) for pulling and fixedly connecting the sliding seat (8.1), the traction belt (8.3) is in ring structure, the traction belt (8.3) is driven by traction power (9), forming the structure that the sliding seat is pulled up and down by the traction belt (8.3).

4. The workover top drive of claim 3, wherein, The side surface of the slide rail (7) is provided with an inner recessed long groove (7.1) for installing the traction belt (8.3), the traction belt (8.3) is embedded in the long groove (7.1), and one end of the slide rail (7) is provided with a guide wheel, which plays a structure of tensioning the traction belt (8.3).

5. The workover top drive of claim 4, wherein, The sliding seat (8.1) is provided with a protrusion (8.4) that is embedded in the long groove (7.1), the protrusion (8.4) is in sliding fit with the inner side surface of the long groove (7.1), and further includes a through hole (8.5) for the traction belt (8.3) to pass through at the protrusion (8.4), the traction belt (8.3) and the sliding seat (8.1) are detachably fixedly connected by bolts.

6. The well repair overflidrive of claim 5, characterized in that, The traction power (9) includes a traction motor (9.1) and a heavy-duty double-head worm gear reducer (9.2) in transmission connection with the traction motor (9.1), the output shaft of the heavy-duty double-head worm gear reducer (9.2) drives a driving wheel (9.3) above the slide rail (7) through gear transmission, and the traction belt (8.3) and the driving wheel (9.3) form a belt transmission structure.

7. The well repair overflidrive of claim 6, characterized in that, Also include the sliding rail (7) on the upper end of the traction motor (9.1) for fixed installation and transmission connection with the traction motor (9.1) heavy load double head worm reduction gear (9.2), and transmission shaft (9.4), and the driven wheel (9.3) crossbeam (9.5), the transmission shaft (9.4) is fixedly installed in the bearing seat (9.6) on one side of the crossbeam (9.5), the driven wheel (9.3) is fixedly installed in the wheel seat at the position of the crossbeam (9.5).

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