Self-balancing vertical vehicle-mounted workover rig derrick

Abstract

The utility model discloses a self-balancing upright vehicle-mounted workover rig derrick which comprises a derrick base, a derrick main body, a self-balancing crown block and a base lifting mechanism, the derrick base is fixedly supported on a frame, and the base lifting mechanism supports the derrick base and the derrick main body above. The derrick main body adopts a vertical sleeved type derrick upper body and derrick lower body combined structure, the rotating shaft is arranged between the self-balancing crown block and the derrick upper body in a penetrating manner, and the self-balancing crown block is driven by the rotating oil cylinder to rotate around the rotating shaft, so that the self-balancing crown block is expanded into a working state or contracted into a storage state along with the derrick main body, and a traditional derrick and crown block fixed mounting mode is changed; the self-balancing crown block is stressed in a balanced mode by winding a working steel wire rope around pulleys on the two sides and a frame guide wheel, the derrick can be kept stable without arranging a guy rope, all structures can be transported along with a truck, the whole moving convenience is improved, the well site operation area is reduced, the derrick transportation overrun situation is avoided, and it is guaranteed that the traveling block is stable in operation state; and the operation of tubular column wellhead automatic equipment can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling and workover equipment modification, and more specifically, to a self-balancing upright vehicle-mounted workover rig derrick. Background Art

[0002] With the continuous development of the oil industry, the demand for replacement and upgrading of drilling and well repair equipment in existing mining areas is increasing. As a key component, the well repair rig derrick explores the structure of the vehicle-mounted well repair rig derrick that meets the requirements of use and transportation, which can greatly promote the transformation and upgrading of vehicle-mounted well repair rig equipment and improve operating efficiency. The existing well repair rig derrick design adopts a front-opening upper and lower double-section telescopic derrick. The derrick tilts forward during operation and relies on components such as guy ropes to maintain a stable operating state. Due to the foundation conditions and size restrictions of some well sites, some areas cannot use wind-loaded guy ropes to maintain the stability of the derrick structure during operation. Other stabilization structures are also affected by factors such as the overall machine layout and transportation space. In addition, the degree of automation is constantly improving, and the existing derrick structure cannot meet the needs of automated tools. Utility Model Content

[0003] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described below.

[0004] Another object of the utility model is to provide a self-balancing upright vehicle-mounted workover rig derrick to solve the technical problems of the prior art vehicle-mounted workover rig derrick being limited by the space of the well site, inconvenient to install, and inconvenient to maintain structural stability.

[0005] In order to achieve these purposes and other advantages according to the utility model, the utility model provides a self-balancing upright vehicle-mounted workover rig derrick, comprising:

[0006] The derrick base is supported on the frame at the rear end of the transport vehicle;

[0007] The derrick body comprises a derrick upper body and a derrick lower body arranged vertically, the derrick upper body is slidably connected to the inner side of the derrick lower body and a telescopic mechanism is arranged between the derrick upper body and the derrick lower body to drive the derrick upper body to extend or retract relative to the derrick lower body, the bottom front end of the derrick lower body is hinged to the top front end of the derrick base, a lifting cylinder is arranged at the bottom rear end of the derrick lower body, which is used to support and fix the top rear end of the derrick base to maintain the upright state of the derrick body after the derrick body rotates from the horizontal state, and a rotating shaft is arranged at the top rear end of the derrick upper body along the width direction of the transport vehicle;

[0008] The self-balancing overhead crane comprises an overhead crane frame, which is rotatably connected to the upper body of the derrick through a rotating shaft. A rotating cylinder is also hinged between the overhead crane frame and the upper body of the derrick, and the overhead crane frame is driven to rotate around the rotating shaft by the rotating cylinder. A wellhead side pulley and a winch side pulley are respectively provided at opposite ends of the overhead crane frame. A frame guide wheel is provided directly below the corresponding winch side pulley on the transport vehicle. After the working wire rope is led out, it passes around the frame guide wheel, the wellhead side pulley and the winch side pulley in sequence and then is connected to the traveling block.

[0009] Preferably, a limit block is provided at the top rear end of the derrick upper body for limiting the rearward rotation of the crown frame to a desired terminal position.

[0010] Preferably, a pair of ear plates are provided at the top front end of the derrick upper body, a first ear hole is provided on the ear plate along the width direction of the transport vehicle, a second ear hole is provided on the crane frame corresponding to the first ear hole, when the crane frame rotates to abut against the limit block, a pair of first ear holes and the second ear hole are located in the same axial direction, and an automatic pinning device is provided at the top front end of the derrick upper body on the outer side of the ear plate, so that a pin shaft can be automatically inserted when the first ear hole is aligned with the second ear hole to fix the crane frame.

[0011] Preferably, a hanging ear is further provided at one end of the crown block frame through which the rotating shaft is passed, a pulley bracket is connected to the rear side of the lower end of the derrick lower body, an adjusting rod is also hinged at the bottom of the derrick lower body, a traveling carriage righting wire rope is connected between the hanging ear and the adjusting rod, the traveling carriage righting wire rope passes around the pulley bracket, and the traveling carriage righting wire rope is straightened through the adjusting rod.

[0012] Preferably, it further comprises a base lifting mechanism, which is arranged on a foundation at the rear end of the transport vehicle and is used to lift and support the rear end of the derrick base upward.

[0013] Preferably, the derrick base is in a trapezoidal structure as a whole, wherein the side facing the front end of the transport vehicle is tilted downward, and the side facing the rear end of the transport vehicle is vertically arranged.

[0014] Preferably, the derrick body lies horizontally on the transport vehicle when its total length is the smallest, and a front bracket is detachably connected downwardly to one side of the derrick upper body outside the derrick lower body and close to the derrick lower body, and the bottom of the front bracket is supported on the transport vehicle.

[0015] The utility model at least has the following beneficial effects: the utility model has a self-balancing upright vehicle-mounted workover rig derrick, the self-balancing upright vehicle-mounted workover rig derrick comprises a derrick base, a derrick body, a self-balancing crane and a base lifting mechanism, the derrick base is fixedly supported on the vehicle frame, the derrick body adopts an upright set-type derrick upper body and a derrick lower body combined structure, the crane frame and the derrick upper body are rotatably connected by a rotating shaft, and the crane frame is driven to rotate around the rotating shaft by a rotating cylinder, so that the self-balancing crane is located in the same length direction or vertical direction relative to the derrick body, so as to be telescopically extended and extended with the derrick body. It can be opened to working state or retracted to storage state, which changes the traditional derrick fixing method and the installation and fixing method of the crown block. It adopts a self-balancing crown block, which balances the forces at both ends of the crown block by bypassing the wellhead side pulley, winch side pulley and frame guide wheel. The derrick can be kept stable without tension ropes, and can meet the operation of the pipe string wellhead automation equipment. The base lifting mechanism supports the upper derrick base and the derrick body to keep the structure stable. Each structure can be transported with the vehicle, reducing the operating area of ​​the well site, avoiding the over-limit situation of the derrick transportation, ensuring the stability of the traveling block operation state and improving the convenience of moving with the vehicle.

[0016] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the main structure of the derrick body of the utility model in a horizontal state;

[0018] Figure 2 It is a schematic diagram of the main structure of the derrick body of the utility model in an upright state;

[0019] Figure 3 It is an enlarged structural diagram of the self-balancing overhead crane of the utility model;

[0020] The accompanying drawings in the specification are as follows: 1. derrick base, 2. derrick upper body, 3. derrick lower body, 4. rotating shaft, 5. self-balancing overhead crane, 6. rotating cylinder, 7. wellhead side pulley, 8. winch side pulley, 9. frame guide wheel, 10. pin shaft, 11. hanging ear, 12. pulley bracket, 13. adjusting rod, 14. base lifting mechanism, 15. transport vehicle frame, 16. front bracket, 17. traveling carriage righting device. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0022] It should be noted that, in the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0023] like Figure 1-3 As shown, the utility model provides a self-balancing upright vehicle-mounted workover rig derrick, comprising:

[0024] The derrick base 1 is supported on the frame 15 at the rear end of the transport vehicle;

[0025] The derrick body comprises a derrick upper body 2 and a derrick lower body 3 arranged vertically. The derrick upper body 2 is slidably connected to the inner side of the derrick lower body 3 and a telescopic mechanism is arranged between the derrick upper body 2 and the derrick lower body 3 to drive the derrick upper body 2 to extend or retract relative to the derrick lower body 3. The bottom front end of the derrick lower body 3 is hinged to the top front end of the derrick base 1. A lifting cylinder is arranged at the bottom rear end of the derrick lower body 3 to support and fix the top rear end of the derrick base 1 to maintain the upright state of the derrick body after the derrick body rotates from a horizontal state. A rotating shaft 4 is arranged at the top rear end of the derrick upper body 2 along the width direction of the transport vehicle;

[0026] The self-balancing crane 5 includes a crane frame, which is rotatably connected to the derrick upper body 2 through a rotating shaft 4. A rotating cylinder 6 is also hinged between the crane frame and the derrick upper body 2. The crane frame is driven to rotate around the rotating shaft 4 through the rotating cylinder 6. A wellhead side pulley 7 and a winch side pulley 8 are respectively provided at opposite ends of the crane frame. A frame guide wheel 9 is provided directly below the corresponding winch side pulley on the transport vehicle. After the working wire rope is led out from the rope drum, it passes around the frame guide wheel 9, the wellhead side pulley 7, and the winch side pulley 8 in sequence and then connects to the traveling carriage.

[0027] by Figure 1The left side is the front end of the transport vehicle, and the right side is the rear end of the transport vehicle. The transport vehicle is provided with a pushing cylinder for pushing the derrick body from a horizontal to an upright state. The self-balancing upright vehicle-mounted workover rig derrick includes a derrick base 1 fixedly supported on the frame, a double-section mast-type upper and lower body derrick, an adjustable self-balancing overhead crane 5, etc. The top hinge seat of the derrick base 1 is connected to the bottom back hinge seat of the derrick lower body 3 through a pin shaft 10. Adjustment bolts are arranged in the front opening direction of the derrick lower body 3, and the inclination angle of the derrick can be adjusted by adjusting the bolts. The derrick body adopts an upright set-type derrick upper body 2 + derrick lower body 3 structure, and the overhead crane frame and the derrick upper body 2 are connected. The self-balancing crane 5 is rotatably connected through the rotating shaft 4, and the rotating oil cylinder 6 is provided to drive the crane frame to rotate around the rotating shaft 4, so that the self-balancing crane 5 is located in the same length direction or vertical direction relative to the derrick body, so that it can be expanded to a working state or contracted to a storage state with the derrick body. The traditional derrick fixing method and the crane installation and fixing method are changed. A self-balancing crane is adopted, and one end of the working wire rope is used for traction operation, and the other end is wound around the wellhead side pulley 7, the winch side pulley 8, and the frame guide wheel 9, so that the forces at both ends of the crane are balanced, and the derrick can be kept stable without tensioning ropes, and the operation of the pipe string wellhead automation equipment can be met.

[0028] In another technical solution, Figure 1-3 As shown, a limit block is provided at the top rear end of the derrick upper body 2, which is used to limit the rearward rotation of the crane frame to the desired terminal position. The limit block is welded in advance to the bottom of the derrick upper body 2 at the crane frame. When the crane frame contacts the limit block, it is considered that the crane frame has reached the rotation terminal position, and then the position of the crane frame can be locked accordingly. The limit block can also play a certain position safety protection role.

[0029] In another technical solution, Figure 1-3 As shown, a pair of ear plates are provided at the top front end of the derrick upper body 2, and a first ear hole is opened on the ear plate along the width direction of the transport vehicle, and a second ear hole is opened on the crown block frame corresponding to the first ear hole. When the crown block frame rotates to abut against the limit block, a pair of first ear holes and the second ear holes are located in the same axial direction, and an automatic pin-threading device is correspondingly provided on the outer side of the ear plate at the top front end of the derrick upper body 2, so that a pin shaft 10 can be automatically inserted when the first ear hole is aligned with the second ear hole, so as to realize automatic fixation of the crown block.

[0030] In another technical solution, Figure 1-3 As shown, a hanging ear 11 is also provided at one end of the crown block frame through which the rotating shaft 4 is passed, a pulley bracket 12 is connected to the rear side of the lower end of the derrick lower body 3, an adjusting rod 13 is also hinged at the bottom of the derrick lower body 3, a traveling carriage straightening wire rope is connected between the hanging ear 11 and the adjusting rod 13, the traveling carriage straightening wire rope passes around the pulley bracket 12, and is straightened by the adjusting rod 13.

[0031] Adjust the position of the adjusting rod 13. When the derrick upper body 2 is fully extended, the traveling block straightening wire rope is connected to the adjusting rod 13 to make the traveling block straightening wire rope straight. The other end of the adjusting rod 13 is fixed to the fixed ear plate at the bottom of the derrick lower body 3 to ensure that the traveling block straightening wire rope is always in a straight state when in use.

[0032] In another technical solution, Figure 1-3 As shown, the derrick also includes a base lifting mechanism 14, which is arranged on the foundation at the rear end of the transport vehicle and is used to lift and support the rear end of the derrick base 1. After being firmly fixed on the foundation, a support cylinder is arranged upward at the right end of the base lifting mechanism 14, and the support cylinder extends upward. After extending from the rear of the frame, the bottom of the frame is supported, thereby supporting the derrick base 1 to maintain the stability of the upper structure. The base lifting mechanism 14 is transported with the vehicle, which reduces the operating area of ​​the well site, avoids the over-limit situation of the derrick transportation, ensures the stability of the operating state of the traveling carriage, and improves the convenience of moving with the vehicle.

[0033] In another technical solution, Figure 1-3 As shown, the derrick base 1 is a trapezoidal structure as a whole, wherein the side facing the front end of the transport vehicle is tilted downward, and the side facing the rear end of the transport vehicle is vertically arranged to improve the stability of the derrick base 1 in supporting the derrick body.

[0034] In another technical solution, Figure 1-3 As shown, when the main body of the derrick is at its smallest length, it lies horizontally on the transport vehicle, and a front bracket 16 is detachably connected downwardly to the side of the upper body 2 of the derrick located outside the lower body 3 of the derrick and close to the lower body 3 of the derrick, and the bottom of the front bracket 16 is supported on the transport vehicle. When the main body of the derrick lies horizontally, the front, middle and rear are supported by the front bracket 16, the vehicle frame and the derrick base 1 respectively, to ensure balanced and stable support.

[0035] A specific method for using a self-balancing upright vehicle-mounted workover rig derrick may include the following steps:

[0036] S1. The derrick body lies horizontally on the transport vehicle for transportation. At this time, the telescopic mechanism is in a retracted state, the derrick body is in a sleeved state, and the crown frame rotates backward around the rotating shaft 4, with a part of it retracted into the derrick upper body 2 and a part of it extending forward, ensuring the transportation size requirements.

[0037] S2, when the derrick is lifted, the base lifting mechanism 14 is placed on the foundation, and the rear end of the derrick base 1 is lifted upward to support it. Then the lifting cylinder is extended to keep the derrick body upright. At this time, the derrick is still in the closed state.

[0038] S3, the pin 10 of the automatic pin threading device of the overhead crane is pulled out, and the self-balancing overhead crane 5 drives the overhead crane frame to rotate around the rotating shaft 4 through the rotating cylinder 6. When the overhead crane frame rotates to a horizontal state, the pin 10 passes through the first ear hole and the second ear hole at the bottom of the overhead crane and the locking position is adjusted. Subsequently, the upper body 2 of the derrick is extended out of the lower body 3 of the derrick through the telescopic mechanism to enter the working state.

[0039] S4. When the self-balancing crane 5 is in working state, the working wire rope passes around the wellhead side pulley, the winch side pulley and the frame guide wheel, so that the forces on both ends of the crane reach a balanced state when the crane is working. At the same time, due to the arrangement of the pulleys on both sides of the self-balancing crane 5, the traveling carriage has a certain deflection. For this, a traveling carriage righting device 17 is also slidably connected to the traveling carriage righting wire rope, and the righting frame has a built-in righting pulley. The righting frame is fixed to the traveling carriage through a pin 10. When the derrick upper body 2 is fully extended, the traveling carriage righting wire rope is connected to the adjusting rod 13 to straighten the traveling carriage righting wire rope. The other end of the adjusting rod 13 is fixed to the fixed ear plate at the bottom of the derrick lower body 3 to ensure that the traveling carriage righting wire rope is always in a straight state during use. After the traveling carriage righting wire rope is straightened, the righting pulley slides on the traveling carriage righting wire rope to achieve the traveling carriage righting effect.

[0040] S5. When lowering, the upper body 2 of the derrick is retracted into the lower body, so that the traveling block falls to the specified position, and then the traveling block straightening device 17 is disassembled, the pin 10 is pulled out, and the locking state of the crown block frame is released. The rotating cylinder 6 contracts to rotate the crown block frame backward to the right position, and then the pin 10 is inserted into the first ear hole and the second ear hole to fix the locking position. Then the derrick body begins to be lowered onto the frame 15 of the transport vehicle.

[0041] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A self-balancing upright vehicle-mounted workover rig derrick, characterized in that: include: The derrick base is supported on the frame at the rear end of the transport vehicle; The derrick body comprises a derrick upper body and a derrick lower body arranged vertically, the derrick upper body is slidably connected to the inner side of the derrick lower body and a telescopic mechanism is arranged between the derrick upper body and the derrick lower body to drive the derrick upper body to extend or retract relative to the derrick lower body, the bottom front end of the derrick lower body is hinged to the top front end of the derrick base, a lifting cylinder is arranged at the bottom rear end of the derrick lower body, which is used to support and fix the top rear end of the derrick base to maintain the upright state of the derrick body after the derrick body rotates from the horizontal state, and a rotating shaft is arranged at the top rear end of the derrick upper body along the width direction of the transport vehicle; The self-balancing overhead crane comprises an overhead crane frame, which is rotatably connected to the upper body of the derrick through a rotating shaft. A rotating cylinder is also hinged between the overhead crane frame and the upper body of the derrick, and the overhead crane frame is driven to rotate around the rotating shaft by the rotating cylinder. A wellhead side pulley and a winch side pulley are respectively provided at opposite ends of the overhead crane frame. A frame guide wheel is provided directly below the corresponding winch side pulley on the transport vehicle. After the working wire rope is led out, it passes around the frame guide wheel, the wellhead side pulley and the winch side pulley in sequence and then is connected to the traveling block.

2. The self-balancing upright vehicle-mounted workover rig derrick according to claim 1, characterized in that: A limiting block is arranged at the top rear end of the derrick upper body, which is used to limit the rearward rotation of the crown frame to a desired terminal position.

3. The self-balancing upright vehicle-mounted workover rig derrick according to claim 2, characterized in that: A pair of ear plates are provided at the top front end of the derrick upper body, and a first ear hole is opened on the ear plate along the width direction of the transport vehicle, and a second ear hole is opened on the crown block frame corresponding to the first ear hole. When the crown block frame rotates to abut against the limit block, the pair of first ear holes and the second ear holes are located in the same axial direction, and an automatic pin-threading device is provided at the top front end of the derrick upper body on the outer side of the ear plate, so that a pin shaft can be automatically inserted when the first ear hole is aligned with the second ear hole to fix the crown block frame.

4. The self-balancing upright vehicle-mounted workover rig derrick according to claim 1, characterized in that: A hanging ear is also provided at one end of the crown block frame through which the rotating shaft is passed, a pulley bracket is connected to the rear side of the lower end of the derrick lower body, an adjusting rod is also hinged at the bottom of the derrick lower body, a traveling carriage straightening wire rope is connected between the hanging ear and the adjusting rod, the traveling carriage straightening wire rope passes around the pulley bracket, and the traveling carriage straightening wire rope is straightened through the adjusting rod.

5. The self-balancing upright vehicle-mounted workover rig derrick according to claim 1, characterized in that: It also includes a base lifting mechanism, which is arranged on the foundation at the rear end of the transport vehicle and is used to lift and support the rear end of the derrick base.

6. The self-balancing upright vehicle-mounted workover rig derrick according to claim 1, characterized in that: The derrick base is in a trapezoidal structure as a whole, wherein the side facing the front end of the transport vehicle is tilted downward, and the side facing the rear end of the transport vehicle is vertically arranged.

7. The self-balancing upright vehicle-mounted workover rig derrick according to claim 1, characterized in that: The derrick body lies horizontally on the transport vehicle when the total length is the smallest. A front bracket is detachably connected downwardly to the side of the derrick upper body located outside the derrick lower body and close to the derrick lower body, and the bottom of the front bracket is supported on the transport vehicle.

Images