A device for recovering a used oil well oil suction casing

Abstract

The application provides a device for recovering and pulling out an oil suction casing of a waste oil well, which comprises a first layer platform arranged on a base plate, a second layer platform arranged on the first layer platform, and the height of the first layer platform from the base plate being adjustable up and down, the height of the second layer platform from the first layer platform being adjustable up and down, a top platform arranged on the second layer platform, and a through hole for the casing passing through being arranged at the center of the base plate, the first layer platform, the second layer platform and the top platform; a fixed hydraulic chuck assembly is arranged on the base plate, a rotary hydraulic chuck assembly is arranged on the first layer platform in a flexible manner, a pipe clamping cylinder assembly is arranged on the second layer platform, a pull plate cylinder assembly is arranged on one side of the bottom of the top platform, and a pipe cutting assembly is arranged on the top platform. The device can realize the whole process operation of a connecting rod, a pressing rod, pipe pulling and pipe cutting, and can conveniently and quickly complete the recovery and pulling out operation of the oil suction casing.

Description

Technical Field

[0001] This application belongs to the field of oil suction casing recycling technology, and in particular relates to a device for retrieving and recycling abandoned oil well suction casing. Background Technology

[0002] The treatment of suction casing in abandoned oil wells is a crucial step in well sealing operations. Currently, the most environmentally friendly method for treating suction casing in abandoned oil wells is retrieval and recovery. This involves using equipment to pull the suction casing out of the wellhead section by section. This method completely removes potential sources of contamination (residual oil, scale, and deposits on the pipe wall) and metal pipes that may corrode and leak in the future, providing a clearer and more reliable wellbore for subsequent sealing operations such as running bridge plugs and injecting cement plugs.

[0003] However, since the suction casing is encased and fixed in the oil well by concrete, and the wall of the suction casing is relatively thin, if no pretreatment is done, directly pulling out the suction casing will not only require a large pulling force, but may also cause the casing to break during the pulling process, which will lead to difficulties in subsequent treatment. Utility Model Content

[0004] In view of this, this application aims to propose a device for retrieving and recovering abandoned oil well suction casing to solve the problem that suction casing is not easy to retrieve and recover.

[0005] To achieve the above objectives, the technical solution of this application is implemented as follows:

[0006] This application provides a device for retrieving and recovering abandoned oil well suction casing, comprising:

[0007] Chassis, first-level platform, second-level platform, top platform, fixed hydraulic chuck assembly, rotary hydraulic chuck assembly, pipe clamping cylinder assembly, plate-pulling cylinder assembly, pipe cutting assembly, and pressure bar assembly;

[0008] The first-layer platform is mounted on the chassis, the second-layer platform is mounted on the first-layer platform, and the height of the first-layer platform relative to the chassis is adjustable vertically, the height of the second-layer platform relative to the first-layer platform is adjustable vertically, the top platform is mounted on the second-layer platform, and a through hole for the sleeve to pass through is provided at the center of the chassis, the first-layer platform, the second-layer platform and the top platform.

[0009] The fixed hydraulic chuck assembly is mounted on the chassis, the rotary hydraulic chuck assembly is flexibly mounted on the first platform, the pipe clamping cylinder assembly is mounted on the second platform, the plate pulling cylinder assembly is mounted on the bottom side of the top platform, and the pipe cutting assembly is mounted on the top platform.

[0010] By controlling the movement of the fixed hydraulic chuck assembly, the rotary hydraulic chuck assembly, and the pull plate cylinder assembly, the pressure rod assembly is driven to complete the rod connection and pressure rod operation, so as to insert the drill bit of the pressure rod assembly into the casing;

[0011] Drive the casing clamping cylinder assembly and the casing cutting assembly to pull the casing out of the well and complete the cut-off and recovery operation.

[0012] Furthermore, the first-layer platform is mounted on the chassis via a first lifting cylinder, the second-layer platform is mounted on the first-layer platform via a second lifting cylinder, and the top platform is mounted on the second-layer platform via a tie rod.

[0013] Furthermore, the fixed hydraulic chuck assembly is composed of a first mounting base plate, a first rotary cylinder, a first pull tube, a first spindle, and a first chuck assembly;

[0014] The first mounting base plate is disposed on the chassis, and a first through hole corresponding to the through hole is opened at the center of the first mounting base plate. The first rotary cylinder is disposed on the first mounting base plate. One end of the first pull tube is disposed on the piston rod of the first rotary cylinder, and the other end of the first pull tube is fixed on the wedge sleeve of the first chuck. The first spindle is sleeved on the first pull tube. The small flange end of the first spindle is fixed on the rod end face of the first rotary cylinder, and the large flange end of the first spindle is fixed on the bottom surface of the first chuck. By controlling the first pull tube to perform a push-pull action, the jaws on the first chuck are driven to open and retract.

[0015] Furthermore, the rotary hydraulic chuck assembly is composed of a second mounting base plate, a second rotary cylinder, a second pull tube, a second main shaft, a second chuck, a steering mechanism, and a mounting support assembly;

[0016] The second mounting base plate is mounted on the first platform via multiple elastic feet, and a second through hole corresponding to the first through hole is opened at the center of the second mounting base plate. The second rotary cylinder is mounted on the second mounting base plate. The second pull tube is inserted into the second spindle, and one end of the second pull tube is mounted on the piston rod of the second rotary cylinder. The other end of the second pull tube is fixed to the wedge sleeve of the second chuck. The small flange end of the second spindle is fixed to the rod end face of the second rotary cylinder, and the large flange end of the second spindle is fixed to the bottom surface of the second chuck. By controlling the first pull tube to perform a push-pull action, the jaws on the second chuck are driven to open and retract.

[0017] The mounting bracket is fixed to the second mounting base plate, the steering mechanism is fixed to the upper end face of the mounting bracket, and the steering mechanism is connected to the second main shaft.

[0018] Furthermore, the steering mechanism includes a first hydraulic motor, a reduction mechanism, and a first output gear. The first hydraulic motor is fixedly connected to the input end of the reduction mechanism, the output shaft of the first hydraulic motor is correspondingly connected to the input shaft hole of the reduction mechanism, the first output gear is disposed at the output shaft end of the reduction mechanism, and the first output gear meshes with an external gear disposed on the outer side of the second main shaft.

[0019] Furthermore, the pipe clamping cylinder assembly includes a pipe clamping cylinder and a clamp. The pipe clamping cylinder is disposed on the top surface of the second layer platform. The clamp faces the through hole of the second layer platform. A T-shaped groove is provided on the side of the clamp away from the through hole. The T-shaped groove is assembled and connected to the piston rod end of the pipe clamping cylinder.

[0020] Furthermore, the draw plate cylinder assembly consists of a draw plate cylinder, a draw plate, a guide seat, and guide wheels. The draw plate cylinder is disposed on the bottom surface of the top platform. The draw plate is assembled and connected to the piston rod end of the draw plate cylinder. The guide seat is disposed on the bottom surface of the top platform. A plurality of guide wheels are rotatably disposed on the guide seat. The wheel surface of the guide wheel contacts the groove of the draw plate to guide the movement of the draw plate.

[0021] Furthermore, the pipe cutting assembly is composed of an annular guide rail, an annular mounting support, a rotating mechanism, and a feed cutting mechanism.

[0022] The annular mounting bracket is disposed on the top surface of the top platform, the annular guide rail is mounted on the top flange of the annular mounting bracket, the rotating mechanism is connected to the annular guide rail, and the rotating mechanism rotates around the annular guide rail;

[0023] The feed cutting mechanism is mounted on the rotating mechanism. The feed cutting mechanism is controlled to move toward the through hole and moves around in coordination with the rotating mechanism to perform cutting operations on the sleeve inside the through hole.

[0024] Furthermore, the rotating mechanism includes a second hydraulic motor, a movable support, a second output gear, and a rotating wheel. The second hydraulic motor is mounted on the movable support, the second output gear is assembled and connected to the output shaft of the second hydraulic motor, and the second output gear meshes with a gear provided on the annular guide rail. The rotating wheel is rotatably mounted on the movable support and cooperates with the annular guide rail.

[0025] The feed cutting mechanism includes a feed cylinder, a linear guide rail, and a cutting machine. The feed cylinder is disposed on both side walls of the movable support. The fixed end of the cutting machine is assembled and connected to the piston rod end of the feed cylinder. The linear guide rail is disposed on the top wall of the movable support. The top surface of the cutting machine is disposed on the slider of the linear guide rail, and the cutting end of the cutting machine is oriented towards the through hole.

[0026] Furthermore, the pressure rod assembly includes drill rods and multi-faceted drill bits. There are multiple drill rods connected end to end, and the multi-faceted drill bit is fixedly connected to the end of one of the drill rods.

[0027] Compared with the prior art, the abandoned oil well casing retrieval and recovery device described in this application has the following advantages:

[0028] The abandoned oil well suction casing retrieval and recovery device described in this application can realize the entire process of rod connection, rod pressing, pipe pulling and pipe cutting, and can conveniently and quickly complete the retrieval and recovery of suction casing. The whole process is stable and reliable, and effectively improves the work efficiency of retrieval and recovery of suction casing in abandoned oil wells. Attached Figure Description

[0029] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0030] Figure 1 This is a plan sectional view of an abandoned oil well suction casing retrieval and recovery device according to an embodiment of this application;

[0031] Figure 2 This is a schematic diagram of a device for retrieving and recovering an abandoned oil well casing, as described in an embodiment of this application.

[0032] Figure 3 This is a planar sectional view of the fixed hydraulic chuck assembly described in the embodiments of this application;

[0033] Figure 4 This is a planar sectional view of the rotary hydraulic chuck assembly described in the embodiments of this application;

[0034] Figure 5 This is a planar sectional view of the cylinder assembly described in the embodiment of this application;

[0035] Figure 6 This is a planar sectional view of the draw plate cylinder assembly described in the embodiments of this application;

[0036] Figure 7 This is a planar sectional view of the pipe-cutting assembly described in the embodiments of this application;

[0037] Figure 8 This is a planar sectional view of the pressure bar assembly and sleeve described in the embodiments of this application.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1-Chassis; 2-First platform; 3-Second platform; 4-Top platform; 5-Fixed hydraulic chuck assembly; 51-First mounting base plate; 52-First rotary cylinder; 53-First pull tube; 54-First spindle; 55-First chuck; 6-Rotating hydraulic chuck assembly; 61-Second mounting base plate; 62-Second rotary cylinder; 63-Second pull tube; 64-Second spindle; 65-Second chuck; 66-Steering mechanism; 661-First hydraulic motor; 662-Reduction mechanism; 663-First output gear; 67-Mounting Support assembly; 68-Elastic foot; 7-Pipe clamping cylinder assembly; 7-1-Pipe clamping cylinder; 7-2-Clamping caliper; 8-Draw plate cylinder assembly; 81-Draw plate cylinder; 82-Draw plate; 83-Guide seat; 84-Guide wheel; 9-Pipe cutting assembly; 91-Annular guide rail; 92-Annular mounting support; 93-Rotating mechanism; 931-Second hydraulic motor; 932-Moving bracket; 933-Second output gear; 934-Rotating wheel; 94-Feed cutting mechanism; 941-Feed cylinder; 942-Linear guide rail; 943-Cut machine; 10-Pressure rod assembly; 101-Drill rod; 102-Multi-faceted drill bit; 11-First lifting cylinder; 12-Second lifting cylinder; 13-Casing. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0041] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0042] Please see Figure 1 and Figure 2As shown, this embodiment provides a device for retrieving and recovering abandoned oil well suction casing, including:

[0043] 1. Chassis; 2. First-level platform; 3. Second-level platform; 4. Top platform; 5. Fixed hydraulic chuck assembly; 6. Rotary hydraulic chuck assembly; 7. Pipe clamping cylinder assembly; 8. Pull-out plate cylinder assembly; 9. Pipe cutting assembly; and 10. Pressure bar assembly.

[0044] The first platform 2 is mounted on the chassis 1, the second platform 3 is mounted on the first platform 2, and the height of the first platform 2 relative to the chassis 1 is adjustable vertically. The height of the second platform 3 relative to the first platform 2 is also adjustable vertically. The top platform 4 is mounted on the second platform 3. A through hole for the sleeve 13 to pass through is provided at the center of the chassis 1, the first platform 2, the second platform 3 and the top platform 4.

[0045] The fixed hydraulic chuck assembly 5 is mounted on the chassis 1, the rotary hydraulic chuck assembly 6 is flexibly mounted on the first platform 2, the pipe clamping cylinder assembly 7 is mounted on the second platform 3, the plate pulling cylinder assembly 8 is mounted on the bottom side of the top platform 4, and the pipe cutting assembly 9 is mounted on the top platform 4.

[0046] By controlling the actions of the fixed hydraulic chuck assembly 5, the rotary hydraulic chuck assembly 6, and the pull plate cylinder assembly 8, the pressure rod assembly 10 is driven to complete the rod connection and pressure rod operation, so as to insert the drill bit of the pressure rod assembly 10 into the casing 13.

[0047] Drive the casing cylinder assembly 7 and the casing cutter assembly 9 to pull the casing 13 out of the well and complete the cut-off and recovery operation.

[0048] Specifically, in this embodiment, the device of this application adopts a series structure, using lifting cylinders and tie rods to connect the chassis 1, the first platform 2, the second platform 3 and the top platform 4 in series. The fixed hydraulic chuck assembly 5 is installed on the top surface of the chassis 1, the rotating hydraulic chuck assembly 6 is installed on the top surface of the first platform 2, the pipe clamping cylinder assembly 7 is installed on the top surface of the second platform 3, the plate pulling cylinder assembly 8 is installed on the bottom surface of the top platform 4, and the pipe cutting assembly 9 is installed on the top surface of the top platform 4.

[0049] The device adopts a series platform structure, integrating the fixed hydraulic chuck assembly 5, the rotary hydraulic chuck assembly 6, the pipe clamping cylinder assembly 7, the pull plate cylinder assembly 8, and the pipe cutting assembly 9 into one unit. It can realize the entire process of connecting rod, pressing rod, pulling pipe and cutting pipe using the device of this application, and can conveniently and quickly complete the retrieval and recovery of oil suction casing 13. The whole process is stable and reliable, and effectively improves the work efficiency of retrieval and recovery of oil suction casing 13 in abandoned oil wells.

[0050] In some embodiments, the first platform 2 is mounted on the chassis 1 by the first lifting cylinder 11, the second platform 3 is mounted on the first platform 2 by the second lifting cylinder 12, and the top platform 4 is mounted on the second platform 3 by the tie rod.

[0051] Specifically, in this embodiment, such as Figure 2 As shown, there are six of each of the first lifting cylinder 11 and the second lifting cylinder 12, which are evenly distributed along the axis. The rod end flange of the first lifting cylinder 11 is fixed to the top surface of the chassis 1 by screws, and the cylinder head of the first lifting cylinder 11 is fixed to the top surface of the first platform 2 by screws. The piston rod of the second lifting cylinder 12 passes through the cylinder mounting hole on the first platform 2, and the bottom of the second lifting cylinder 12 is fixed to the bottom surface of the second platform 3 by screws.

[0052] When the piston rod of the lifting cylinder extends, it pushes the cylinder body of the lifting cylinder upward, causing the first platform 2 and the second platform 3 to rise synchronously. When the piston rod of the lifting cylinder retracts, it drives the cylinder body of the lifting cylinder to descend, causing the first platform 2 and the second platform 3 to descend synchronously. The displacement sensor built into the lifting cylinder can provide feedback on the movement information of the piston rod and indicate the height of each platform.

[0053] The lower thread of the pull rod passes through the pull rod mounting hole on the second platform 3. Its insertion depth is limited by the boss of the lower thread of the pull rod, and it is fixed to the top surface of the second platform 3 by a nut. The upper thread of the pull rod passes through the pull rod mounting hole on the top platform 4. Its insertion depth is limited by the boss of the lower thread of the pull rod, and it is fixed to the bottom surface of the top platform 4 by a nut. The pull rod pulls the top platform to rise and fall synchronously with the second platform 3.

[0054] In some embodiments, the fixed hydraulic chuck assembly 5 is composed of a first mounting base plate 51, a first rotary cylinder 52, a first pull tube 53, a first spindle 54 and a first chuck 55.

[0055] The first mounting base plate 51 is mounted on the chassis 1, and a first through hole corresponding to the through hole is opened at the center of the first mounting base plate 51. The first rotary cylinder 52 is mounted on the first mounting base plate 51. One end of the first pull tube 53 is mounted on the piston rod of the first rotary cylinder 52, and the other end of the first pull tube 53 is fixed on the wedge sleeve of the first chuck 55. The first spindle 54 is mounted on the first pull tube 53. The small flange end of the first spindle 54 is fixed on the rod end face of the first rotary cylinder 52, and the large flange end of the first spindle 54 is fixed on the bottom surface of the first chuck 55. By controlling the first pull tube 53 to perform push-pull actions, the jaws on the first chuck 55 are driven to open and retract.

[0056] Specifically, in this embodiment, such as Figure 3As shown, the first mounting base plate 51 of the fixed hydraulic chuck assembly 5 is fixed to the center of the chassis 1 by screws. The first rotary cylinder 52 is fixed to the center of the top surface of the first mounting base plate 51 by screws. The first pull tube 53 is inserted into the first spindle 54. The first pull tube 53 is fixed to the piston rod of the first rotary cylinder 52 by threads. The other end of the first pull tube 53 is fixed to the wedge sleeve of the first chuck 55 by threads. The small flange end of the first spindle 54 is fixed to the rod end face of the first rotary cylinder 52 by screws. The large flange end of the first spindle 54 is fixed to the bottom surface of the first chuck 55 by screws. The extension and retraction of the piston rod of the first rotary cylinder 52 is driven by the extension and retraction of the first pull tube 53, which in turn drives the three jaws on the first chuck 55 to open and retract.

[0057] In some embodiments, the rotary hydraulic chuck assembly 6 is composed of a second mounting base plate 61, a second rotary cylinder 62, a second pull tube 63, a second spindle 64, a second chuck 65, a steering mechanism 66, and a mounting support assembly 67.

[0058] The second mounting base plate 61 is mounted on the first platform 2 by multiple elastic feet 68, and a second through hole corresponding to the first through hole is opened at the center of the second mounting base plate 61. The second rotary cylinder 62 is mounted on the second mounting base plate 61. The second pull tube 63 is inserted into the second spindle 64, and one end of the second pull tube 63 is mounted on the piston rod of the second rotary cylinder 62. The other end of the second pull tube is fixed on the wedge sleeve of the second chuck 65. The small flange end of the second spindle 64 is fixed on the rod end face of the second rotary cylinder 62, and the large flange end of the second spindle 64 is fixed on the bottom surface of the second chuck 65. By controlling the second pull tube 63 to perform push-pull action, the jaws on the second chuck 65 are driven to open and retract.

[0059] The mounting bracket is fixed on the second mounting base plate 61, the steering mechanism 66 is fixed on the upper end face of the mounting bracket, and the steering mechanism 66 is connected to the second main shaft 64.

[0060] The steering mechanism 66 includes a first hydraulic motor 661, a reduction mechanism 662, and a first output gear 663. The first hydraulic motor 661 is fixedly connected to the input end of the reduction mechanism 662, and the output shaft of the first hydraulic motor 661 is correspondingly connected to the input shaft hole of the reduction mechanism 662. The first output gear 663 is disposed at the output shaft end of the reduction mechanism 662, and the first output gear 663 meshes with an external gear provided on the outer side of the second main shaft 64.

[0061] Specifically, in this embodiment, such as Figure 4As shown, the spring-loaded foot 68 in the rotary hydraulic chuck assembly 6 is fixed to the top surface of the second mounting base plate 61 by screws. The spring-loaded foot 68 is also fixed to the top surface of the first platform 2 by the threaded end of the telescopic rod. The telescopic rod of the spring-loaded foot 68 will extend and retract under the action of external force, but will return to its original position after the external force disappears. The second rotary cylinder 62 is fixed to the center of the top surface of the second mounting base plate 61 by screws. The second pull tube 63 is inserted into the second spindle 64. The second pull tube 63 is fixed to the piston rod of the second rotary cylinder 62 by threads. The other end of the second pull tube 63 is fixed to the wedge sleeve of the second chuck 65 by threads. In this embodiment, the spring-loaded foot 68 is used to flexibly connect the rotary hydraulic chuck assembly 6 and the first platform 2, so that it can better cooperate with the threading action.

[0062] The small flange end of the second main shaft 64 is fixed to the rod end face of the second rotary cylinder 62 by screws. The large flange end of the second main shaft 64 is fixed to the bottom surface of the second chuck 65 by screws. The mounting bracket is fixed to the top surface of the second mounting base plate 61 by screws. The steering mechanism 66 is fixed to the upper end face of the mounting bracket by screws. The hydraulic motor in the steering mechanism 66 is fixed to the input end of the reduction mechanism 662 by screws. The output shaft of the hydraulic motor is inserted into the input shaft hole of the reduction mechanism 662. The output gear is inserted into the output shaft of the reduction mechanism 662. The output gear is fixed to the output shaft of the reduction mechanism 662 by set screws. This drives the extension and retraction of the piston rod of the second rotary cylinder 62. By pushing and pulling the second pull tube 63, the three jaws on the second chuck 65 can be driven to open and retract.

[0063] The first hydraulic motor 661 is driven to drive the first output gear 663 to rotate along the axis through the reduction mechanism 662, which in turn drives the second main shaft 64, which meshes with the first output gear 663, to rotate along the axis, and finally drives the second chuck 65 to rotate along the axis.

[0064] In some embodiments, the pipe clamping cylinder assembly 7 includes a pipe clamping cylinder 71 and a clamp 72. The pipe clamping cylinder 71 is disposed on the top surface of the second platform 3, and the clamp 72 faces the through hole of the second platform 3. A T-shaped groove is provided on the side of the clamp 72 away from the through hole, and the T-shaped groove is assembled and connected to the piston rod end of the pipe clamping cylinder 71.

[0065] Specifically, in this embodiment, such as Figure 5As shown, the pipe clamping cylinder 71 in the pipe clamping cylinder assembly 7 is fixed to the top surface of the second platform 3 by screws. The two pipe clamping cylinders 71 are placed opposite each other, and the two clamps 72 are facing the center hole of the second platform 3. The T-shaped head of the piston rod end of the pipe clamping cylinder 71 is inserted into the T-shaped groove of the clamp 72. The extension and retraction of the piston rod of the pipe clamping cylinder 71 can drive the movement of the clamp 72. The piston rod end of the pipe clamping cylinder 71 and the clamp 72 are connected by a T-shaped groove, which not only ensures the control of the movement of the clamp 72 by the pipe clamping cylinder 71, but also avoids damage to the pipe clamping cylinder 71 by the lateral force generated when pulling out the pipe.

[0066] In some embodiments, the draw plate cylinder assembly 8 consists of a draw plate cylinder 81, a draw plate 82, a guide seat 83, and guide wheels 84. The draw plate cylinder 81 is disposed on the bottom surface of the top platform 4. The draw plate 82 is assembled and connected to the piston rod end of the draw plate cylinder 81. The guide seat 83 is disposed on the bottom surface of the top platform 4. Multiple guide wheels 84 are rotatably disposed on the guide seat 83. The wheel surface of the guide wheel 84 contacts the groove of the draw plate 82 to guide the movement of the draw plate 82.

[0067] Specifically, in this embodiment, such as Figure 6 As shown, the draw plate cylinder 81 in the draw plate cylinder assembly 8 is fixed to the bottom surface of the top platform 4 by screws, the draw plate 82 is fixed to the piston rod end of the draw plate cylinder 81 by threads, the guide seat 83 is fixed to the bottom surface of the top platform 4 by screws, the guide wheel 84 is inserted into the guide wheel 84 mounting hole of the guide plate and fixed to the guide wheel 84 mounting hole with a nut, the wheel surface of the guide wheel 84 contacts the groove of the draw plate 82, the guide wheel 84 can rotate along the wheel axis, the movement of the draw plate 82 will drive the guide wheel 84 to rotate, which will reduce the movement resistance of the draw plate 82 and provide guidance for the movement of the draw plate 82. The extension and retraction of the piston rod of the draw plate cylinder 81 will drive the draw plate 82 to move towards the center of the top platform 4 and close the center hole of the top platform 4.

[0068] In some embodiments, the pipe cutting assembly 9 is composed of an annular guide rail 91, an annular mounting support 92, a rotating mechanism 93 and a feed cutting mechanism 94.

[0069] The annular mounting support 92 is set on the top surface of the top platform 4, the annular guide rail 91 is installed on the top flange of the annular mounting support 92, the rotating mechanism 93 is connected to the annular guide rail 91, and the rotating mechanism 93 rotates around the annular guide rail 91.

[0070] The feed cutting mechanism 94 is mounted on the rotating mechanism 93. The feed cutting mechanism 94 is controlled to move toward the through hole and moves around in coordination with the rotating mechanism 93 to perform cutting operations on the sleeve 13 inside the through hole.

[0071] The rotating mechanism 93 includes a second hydraulic motor 931, a movable support 932, a second output gear 933, and a rotating wheel 934. The second hydraulic motor 931 is mounted on the movable support 932. The second output gear 933 is assembled and connected to the output shaft of the second hydraulic motor 931, and the second output gear 933 meshes with a gear on the annular guide rail 91. The rotating wheel 934 is rotatably mounted on the movable support 932 and cooperates with the annular guide rail 91.

[0072] The feed cutting mechanism 94 includes a feed cylinder 941, a linear guide rail 942, and a cutting machine 943. The feed cylinder 941 is mounted on both side walls of the movable support 932. The fixed end of the cutting machine 943 is assembled and connected to the piston rod end of the feed cylinder 941. The linear guide rail 942 is mounted on the top wall of the movable support 932. The top surface of the cutting machine 943 is mounted on the slider of the linear guide rail 942, and the cutting end of the cutting machine 943 faces the through hole.

[0073] Specifically, in this embodiment, such as Figure 7 As shown, the annular mounting bracket 92 in the pipe cutting assembly 9 is fixed to the top surface of the top platform 4 by screws, and the annular guide rail 91 is fixed to the top flange of the annular mounting bracket 92 by screws. The shafts of the four V-shaped wheels are inserted into the mounting holes of the movable bracket 932 and fixed to the movable bracket 932 by nuts. The rollers of the four V-shaped wheels are embedded in the annular guide rail 91. Through the cooperation of the V-shaped wheels and the annular guide rail 91, the movable bracket 932 can move along the annular guide rail 91.

[0074] The second hydraulic motor 931 is fixed to the movable bracket 932 by screws. The output shaft of the second hydraulic motor 931 is fitted into the center hole of the second output gear 933 and fixed by a pin. The second output gear 933 meshes with the gear on the annular guide rail 91. By driving the output shaft of the second hydraulic motor 931 to rotate, the second output gear 933 is driven to rotate. Due to the meshing relationship between the second output gear 933 and the gear on the annular guide rail 91, the movable bracket 932 can be driven to move along the annular guide rail 91. The entire movement of the device in this application is hydraulically driven, which meets the explosion-proof requirements.

[0075] In this embodiment, a rotating mechanism 93 and a feeding mechanism work together to achieve the cutting action of the cutting machine 943 cutting the sleeve 13. The two feeding cylinders 941 in the feeding cutting mechanism 94 are fixed to both sides of the moving bracket 932 by screws. The rod ends of the two feeding cylinders 941 face the center. The top surface of the cutting machine 943 is fixed to the slider of the linear guide rail 942 by screws. The piston rod threads of the two feeding cylinders 941 are threaded into the mounting holes on both sides of the cutting machine 943 and fixed to the rod ends of the feeding cylinders 941 by nuts. Driving the piston rods of the feeding cylinders 941 to extend can push the cutting machine 943 to move towards the center. With the circumferential movement of the moving bracket 932, the blade of the cutting machine 943 can cut the sleeve 13 in the center.

[0076] In some embodiments, the pressure rod assembly 10 includes a drill rod 101 and a multi-faceted drill bit 102. There are multiple drill rods 101 connected end to end, and the multi-faceted drill bit 102 is fixedly connected to the end of one of the drill rods 101.

[0077] Specifically, in this embodiment, such as Figure 8 As shown, this application uses a multi-faceted drill bit 102 to deform the casing 13, thereby causing the outer layer of concrete to crack and detach from the casing 13. The multi-faceted drill bit 102 is then pressed into the suction casing 13, causing the suction casing 13 to expand and deform, thereby causing the outer layer of concrete to crack and detach from the suction casing 13, thus reducing resistance for subsequent pipe pulling.

[0078] When implemented using the device described in this embodiment, the rotary cylinder in the fixed hydraulic chuck assembly 5 is hydraulically driven to retract and lock the jaws on the chuck to the first drill rod 101 with the multi-faceted drill bit 102 already installed at the front end; then, the rotary cylinder in the rotating hydraulic chuck assembly 6 is driven to retract and lock the jaws on the chuck to the second drill rod 101; then, the hydraulic motor in the rotating hydraulic chuck assembly 6 is driven to drive the chuck to rotate the second drill rod 101; with the piston rod of the lifting cylinder retracting, the front thread of the second drill rod 101 can be screwed into the tail thread hole of the first drill rod 101, so that they are connected into a long drill rod 101.

[0079] By driving the hydraulic cylinder 81 to pull the plate, the central hole of the top platform 4 can be closed by the pull plate 82. With the piston rod of the lifting cylinder retracting, the long drill pipe 101 connected as a whole can be pressed into the wellhead. Since the outer diameter of the multi-faceted drill bit 102 is slightly larger than the inner diameter of the casing 13, the casing 13 will deform under the action of the pressing force. The ductility of the concrete covering the outer layer of the casing 13 is much less than that of the casing 13. Under the action of the deformation of the casing 13, it will break and detach from the casing 13, which greatly reduces the resistance of subsequent pipe pulling. By repeating the above-mentioned rod connection and pressing operation, the multi-faceted drill bit 102 can be continuously pressed into the well, destroying all the concrete blocks on the outer layer of the casing 13.

[0080] By driving the two clamping cylinders 71, the two clamps 72 can be used to clamp the casing 13. Then, with the extension of the piston rod of the lifting cylinder, the casing 13 can be pulled out of the well. By driving the hydraulic motor, the cutting machine 943 is driven to move around the exposed casing 13. With the extension of the piston rod of the feed cylinder 941, the cutting machine 943 is driven to move towards the center. The blade inside the cutting machine 943 completely cuts off the casing 13. By repeating the above-mentioned pipe pulling and cutting operations, the casing 13 can be continuously pulled out of the wellhead, cut off and recovered.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

[0082] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. A device for retrieving and recovering abandoned oil well suction casing, characterized in that, include: Chassis, first-level platform, second-level platform, top platform, fixed hydraulic chuck assembly, rotary hydraulic chuck assembly, pipe clamping cylinder assembly, plate-pulling cylinder assembly, pipe cutting assembly, and pressure bar assembly; The first-layer platform is mounted on the chassis, the second-layer platform is mounted on the first-layer platform, and the height of the first-layer platform relative to the chassis is adjustable vertically, the height of the second-layer platform relative to the first-layer platform is adjustable vertically, the top platform is mounted on the second-layer platform, and a through hole for the sleeve to pass through is provided at the center of the chassis, the first-layer platform, the second-layer platform and the top platform. The fixed hydraulic chuck assembly is mounted on the chassis, the rotary hydraulic chuck assembly is flexibly mounted on the first platform, the pipe clamping cylinder assembly is mounted on the second platform, the plate pulling cylinder assembly is mounted on the bottom side of the top platform, and the pipe cutting assembly is mounted on the top platform. By controlling the movement of the fixed hydraulic chuck assembly, the rotary hydraulic chuck assembly, and the pull plate cylinder assembly, the pressure rod assembly is driven to complete the rod connection and pressure rod operation, so as to insert the drill bit of the pressure rod assembly into the casing; Drive the casing clamping cylinder assembly and the casing cutting assembly to pull the casing out of the well and complete the cut-off and recovery operation.

2. The abandoned oil well suction casing retrieval and recovery device according to claim 1, characterized in that: The first-level platform is mounted on the chassis via a first lifting cylinder, the second-level platform is mounted on the first-level platform via a second lifting cylinder, and the top platform is mounted on the second-level platform via a tie rod.

3. The abandoned oil well suction casing retrieval and recovery device according to claim 1, characterized in that: The fixed hydraulic chuck assembly is composed of a first mounting base plate, a first rotary cylinder, a first pull tube, a first spindle, and a first chuck assembly. The first mounting base plate is disposed on the chassis, and a first through hole corresponding to the through hole is opened at the center of the first mounting base plate. The first rotary cylinder is disposed on the first mounting base plate. One end of the first pull tube is disposed on the piston rod of the first rotary cylinder, and the other end of the first pull tube is fixed on the wedge sleeve of the first chuck. The first spindle is sleeved on the first pull tube. The small flange end of the first spindle is fixed on the rod end face of the first rotary cylinder, and the large flange end of the first spindle is fixed on the bottom surface of the first chuck. By controlling the first pull tube to perform a push-pull action, the jaws on the first chuck are driven to open and retract.

4. The abandoned oil well suction casing retrieval and recovery device according to claim 3, characterized in that: The rotary hydraulic chuck assembly is composed of a second mounting base plate, a second rotary cylinder, a second pull tube, a second main shaft, a second chuck, a steering mechanism, and a mounting support. The second mounting base plate is mounted on the first platform via multiple elastic feet, and a second through hole corresponding to the first through hole is opened at the center of the second mounting base plate. The second rotary cylinder is mounted on the second mounting base plate. The second pull tube is inserted into the second spindle, and one end of the second pull tube is mounted on the piston rod of the second rotary cylinder. The other end of the second pull tube is fixed to the wedge sleeve of the second chuck. The small flange end of the second spindle is fixed to the rod end face of the second rotary cylinder, and the large flange end of the second spindle is fixed to the bottom surface of the second chuck. By controlling the first pull tube to perform a push-pull action, the jaws on the second chuck are driven to open and retract. The mounting bracket is fixed to the second mounting base plate, the steering mechanism is fixed to the upper end face of the mounting bracket, and the steering mechanism is connected to the second main shaft.

5. The abandoned oil well suction casing retrieval and recovery device according to claim 4, characterized in that: The steering mechanism includes a first hydraulic motor, a reduction mechanism, and a first output gear. The first hydraulic motor is fixedly connected to the input end of the reduction mechanism, and the output shaft of the first hydraulic motor is correspondingly connected to the input shaft hole of the reduction mechanism. The first output gear is disposed at the output shaft end of the reduction mechanism, and the first output gear meshes with an external gear disposed on the outer side of the second main shaft.

6. The abandoned oil well suction casing retrieval and recovery device according to claim 1, characterized in that: The pipe clamping cylinder assembly includes a pipe clamping cylinder and a clamp. The pipe clamping cylinder is disposed on the top surface of the second layer platform. The clamp faces the through hole of the second layer platform. A T-shaped groove is formed on the side of the clamp away from the through hole. The T-shaped groove is assembled and connected to the piston rod end of the pipe clamping cylinder.

7. The abandoned oil well suction casing retrieval and recovery device according to claim 1, characterized in that: The draw plate cylinder assembly consists of a draw plate cylinder, a draw plate, a guide seat, and guide wheels. The draw plate cylinder is disposed on the bottom surface of the top platform. The draw plate is assembled and connected to the piston rod end of the draw plate cylinder. The guide seat is disposed on the bottom surface of the top platform. Multiple guide wheels are rotatably disposed on the guide seat. The wheel surface of the guide wheel contacts the groove of the draw plate to guide the movement of the draw plate.

8. The abandoned oil well suction casing retrieval and recovery device according to claim 1, characterized in that: The pipe cutting assembly is composed of an annular guide rail, an annular mounting support, a rotating mechanism, and a feed cutting mechanism. The annular mounting bracket is disposed on the top surface of the top platform, the annular guide rail is mounted on the top flange of the annular mounting bracket, the rotating mechanism is connected to the annular guide rail, and the rotating mechanism rotates around the annular guide rail; The feed cutting mechanism is mounted on the rotating mechanism. The feed cutting mechanism is controlled to move toward the through hole and moves around in coordination with the rotating mechanism to perform cutting operations on the sleeve inside the through hole.

9. The abandoned oil well suction casing retrieval and recovery device according to claim 8, characterized in that: The rotating mechanism includes a second hydraulic motor, a movable support, a second output gear, and a rotating wheel. The second hydraulic motor is mounted on the movable support. The second output gear is assembled and connected to the output shaft of the second hydraulic motor, and the second output gear meshes with a gear on the annular guide rail. The rotating wheel is rotatably mounted on the movable support and cooperates with the annular guide rail. The feed cutting mechanism includes a feed cylinder, a linear guide rail, and a cutting machine. The feed cylinder is mounted on both side walls of the movable support. The fixed end of the cutting machine is assembled and connected to the piston rod end of the feed cylinder. The linear guide rail is mounted on the top wall of the movable support. The top surface of the cutting machine is mounted on the slider of the linear guide rail, and the cutting end of the cutting machine faces the through hole.

10. The abandoned oil well suction casing retrieval and recovery device according to claim 1, characterized in that: The pressure rod assembly includes drill rods and multi-faceted drill bits. There are multiple drill rods connected end to end, and the multi-faceted drill bit is fixedly connected to the end of one of the drill rods.

Images