Wellbore string electro-mechanical cutting tool

Abstract

The utility model relates to cutting tool technical field discloses a kind of wellbore string electric mechanical cutting tools, including fixed column, the fixed column bottom is fixedly connected with support column, the support column both sides are penetrated and are provided with through slot, the support column inner middle part is penetrated and is slidably connected with pull rod, the pull rod both sides are rotatably connected with two swing arms, the through slot is slidably connected with strutting piece, two the strutting piece inside is fixedly connected with recess column, the recess column both sides are provided with two sliding slots, the support column bottom is fixedly connected with connecting column, the connecting column inside lower part is fixedly connected with motor, the motor output end is penetrated and is fixedly connected with cutting head in connecting column. In the utility model, pull rod is moved by cylinder, cooperate swing arm to force strutting piece to slide outward along through slot, until strutting piece and wellbore string inner wall are closely contacted, the anchoring of tool is realized.

Description

Technical Field

[0001] This utility model relates to the field of cutting tool technology, specifically to an electromechanical cutting tool for well casing. Background Technology

[0002] As oilfield development and exploitation continue to deepen, the phenomena of deformation and misalignment of downhole casing are increasing year by year. In the Chinese sea area alone, there are hundreds of well cutting operations required every year, and cutting tools are used when cutting the well casing string.

[0003] Most existing cutting tools are not effective at fixing the inner wall of the tubing, which affects the cutting quality and efficiency of the tubing.

[0004] To address the aforementioned issues, an electromechanical cutting tool for well casing is proposed. Utility Model Content

[0005] The purpose of this utility model is to provide an electromechanical cutting tool for well casing, which solves the problem that most existing cutting tools in the background art have poor fixing effect on the inner wall of the casing, thus affecting the cutting quality and efficiency of the casing.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a wellbore tubing string electromechanical cutting tool, comprising a fixed column, a support column fixedly connected to the bottom of the fixed column, through slots on both sides of the support column, a pull rod slidably connected through the middle of the support column, two swing arms rotatably connected to both sides of the pull rod, a spreading member slidably connected in the through slot, a grooved column fixedly connected to the inner side of each of the two spreading members, two sliding grooves on both sides of the grooved column, a connecting column fixedly connected to the bottom of the support column, a motor fixedly connected to the lower part of the connecting column, a cutting head fixedly connected to the output end of the motor through the connecting column, four receiving slots on the outer side of the cutting head, four hydraulic motors fixedly connected inside the cutting head, the output ends of the hydraulic motors extending into the receiving slots, and cutting blades fixedly connected to the output ends of the hydraulic motors, an oil storage chamber on the bottom of the connecting column and the top of the cutting head, two sealing grooves on the top of the cutting head, and two sealing rings fixedly connected to the bottom of the connecting column.

[0007] By adopting the above technical solution, the cylinder drives the pull rod to move, which, in conjunction with the swing arm, forces the opening part to slide outward along the through groove until the opening part is in close contact with the inner wall of the well casing string. With the help of the anti-slip pad on the outside of the opening part, the tool is anchored.

[0008] As a further description of the above technical solution: the swing arm is internally connected to a limiting post that rotates through it, and both ends of the limiting post are fixedly connected to the through groove.

[0009] By adopting the above technical solution, the limiting post plays a role in limiting the movement of the swing arm.

[0010] As a further description of the above technical solution: a slider is slidably connected in the groove, and the slider is fixedly connected to both sides of the end of the swing arm.

[0011] By adopting the above technical solution, a limit block is set on the outside of the slider to achieve the effect of limiting movement.

[0012] As a further description of the above technical solution: the cutting blade is disposed in the storage groove.

[0013] By adopting the above technical solution, the cutting blade can be stored in the storage slot when not in use, and can be extended out of the storage slot when in use.

[0014] As a further description of the above technical solution: the sealing groove is provided on both sides of the oil storage cavity.

[0015] By adopting the above technical solution, the sealing groove serves as a positioning and limiting function.

[0016] As a further description of the above technical solution: the sealing ring is disposed on both sides of the oil storage cavity, and the sealing ring is disposed in the sealing groove.

[0017] By adopting the above technical solution, the hydraulic oil in the oil storage chamber can be sealed by the sealing ring and the sealing groove.

[0018] As a further description of the above technical solution: a sealing ring is fixedly connected inside the sealing groove.

[0019] By adopting the above technical solution, the sealing effect of the oil storage cavity can be improved through the sealing ring.

[0020] As a further description of the above technical solution: a cylinder is fixedly connected inside the fixed column, and the output end of the cylinder is fixedly connected to the pull rod.

[0021] By adopting the above technical solution, the cylinder can drive the tie rod to extend and retract.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides an electromechanical cutting tool for well casing. Four hydraulic motors within the cutting head operate independently, driving the cutting blade in the receiving slot to extend or retract. A cylinder drives a pull rod, which, in conjunction with a swing arm, forces the expansion member to slide outwards along the through-slot until it makes tight contact with the inner wall of the well casing. The anti-slip pad on the outside of the expansion member anchors the tool, improving the cutting effect on the casing. Attached Figure Description

[0023] Figure 1This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional view of the overall structure of this utility model; Figure 3 This is a schematic diagram of the support structure of this utility model; Figure 4 This is an exploded view of the sealing ring of this utility model.

[0024] In the diagram: 1. Fixed column; 2. Support column; 3. Through groove; 4. Tie rod; 5. Swing arm; 6. Limiting column; 7. Spreading component; 8. Groove column; 9. Slide groove; 10. Slider; 11. Connecting column; 12. Motor; 13. Cutting head; 14. Storage groove; 15. Hydraulic motor; 16. Cutting blade; 17. Oil storage chamber; 18. Sealing ring; 19. Sealing groove; 20. Sealing ring; 21. Cylinder. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] To further understand the contents of this utility model, a detailed description of this utility model will be provided with reference to the accompanying drawings.

[0027] Reference Figure 1-4This utility model discloses an electromechanical cutting tool for well casing, comprising a fixed column 1, with a support column 2 fixedly connected to the bottom of the fixed column 1, the support column 2 providing support. Through slots 3 are formed on both sides of the support column 2 for storage. A pull rod 4 is slidably connected through the center of the support column 2, with two swing arms 5 rotatably connected to both sides of the pull rod 4, allowing the swing arms 5 to move via the pull rod 4. A support member 7 is slidably connected within the through slots 3, with an anti-slip pad on the outer side of the support member 7. Grooved columns 8 are fixedly connected to the inner sides of both support members 7, with grooves formed on the inner sides of the grooved columns 8. Two sliding grooves 9 are formed on both sides of the grooved columns 8, serving as limiters. A connecting column 11 is fixedly connected to the bottom of the support column 2, with a groove on the top of the connecting column 11 to facilitate the extension and retraction of the pull rod 4. A motor 12 is fixedly connected to the lower part of the connecting column 11. The output end of the motor 12 passes through the connecting column 11 and is fixedly connected to the cutting head 13. The motor 12 can drive the cutting head 13 to rotate. Four storage slots 14 are opened on the outside of the cutting head 13 to store the cutting blade 16. Four hydraulic motors 15 are fixedly connected inside the cutting head 13. The output ends of the hydraulic motors 15 extend into the storage slots 14, and the cutting blade 16 is fixedly connected to the output ends of the hydraulic motors 15. Oil storage chambers 17 are opened at the bottom of the connecting column 11 and the top of the cutting head 13. The bottom of the oil storage chamber 17 is connected to the hydraulic motor 15 through an oil delivery pipe (not shown in the figure). Furthermore, an oil delivery pipe is installed through and installed in the fixed column 1, the support column 2, and the connecting column 11. The bottom of the oil delivery pipe is connected to the oil storage chamber 17, and the top of the delivery pipe is connected to an external hydraulic pump (not shown in the figure). The hydraulic pump, the oil delivery pipe, the oil storage chamber 17, and the hydraulic motor 15 form a hydraulic system to drive the cutting blade 16 to rotate. The top of the cutting head 13 has two sealing grooves 19, and the bottom of the connecting column 11 is fixedly connected to two sealing rings 18.

[0028] Reference Figure 1-4 A limiting post 6 is rotatably connected through the swing arm 5, and both ends of the limiting post 6 are fixedly connected to the through groove 3. The limiting post 6 serves to limit the movement of the swing arm 5. A slider 10 is slidably connected in the slide groove 9, and the slider 10 is fixedly connected to both sides of the end of the swing arm 5. A limiting block is provided on the outside of the slider 10 to limit the movement. The cutting blade 16 is placed in the storage groove 14, which can store the cutting blade 16 when not in use and allow it to extend out of the storage groove 14 when in use. The sealing groove 19 is located on both sides of the oil storage cavity 17, and the sealing groove 19 serves to limit the movement of the oil. The sealing ring 18 is located on both sides of the oil storage cavity 17 and is located in the sealing groove 19. The sealing ring 18, in conjunction with the sealing groove 19, can seal the hydraulic oil in the oil storage cavity 17. A sealing ring 20 is fixedly connected in the sealing groove 19, which can improve the sealing effect of the oil storage cavity 17. A cylinder 21 is fixedly connected inside the fixed column 1, and the output end of the cylinder 21 is fixedly connected to the pull rod 4. The cylinder 21 can drive the pull rod 4 to extend and retract.

[0029] Working principle: The expansion member 7 retracts into the through groove 3 of the support column 2, and the cutting blade 16 retracts into the receiving groove 14, allowing the tool to be smoothly inserted into the wellbore string. Then, the cylinder 21 retracts and pulls the pull rod 4 upwards, causing the pull rod 4 to slide along the central axis of the support column 2. The pull rod 4 drives the swing arm 5 to rotate around the limiting post 6 (the limiting post 6 is fixed in the through groove 3, restricting the rotation trajectory of the swing arm 5). The slider 10 at the end of the swing arm 5 slides in the groove 9 of the groove post 8, converting the linear motion of the pull rod 4 into the radial motion of the expansion member 7. The two expansion members 7 slide outwards along the through groove 3 until they are tightly fitted against the inner wall of the wellbore string, forming a stable support in conjunction with the anti-slip pads on the outer side of the expansion member 7. The hydraulic motor 15 starts, driving the cutting blade 16 to rotate 90 degrees and extend radially from the receiving groove 14. Finally, the motor 12 drives the cutting head 13 to rotate as a whole, and the cutting blade 16 moves in a circular motion with the cutting head 13, performing a circumferential cut on the inner wall of the string. During the cutting process, the hydraulic system continuously provides pressure to ensure that the cutting blade 16 maintains a constant contact force with the pipe wall.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wellbore tubing string electromechanical cutting tool, comprising a fixed column (1), characterized in that: The bottom of the fixed column (1) is fixedly connected to a support column (2). The support column (2) has through slots (3) on both sides. A tie rod (4) is slidably connected through the middle of the support column (2). Two swing arms (5) are rotatably connected on both sides of the tie rod (4). A support member (7) is slidably connected in the through slot (3). A grooved column (8) is fixedly connected to the inner side of each of the two support members (7). Two sliding grooves (9) are opened on both sides of each grooved column (8). The bottom of the support column (2) is fixedly connected to a connecting column (11). A motor (12) is fixedly connected to the lower part of the connecting column (11). (12) A cutting head (13) is fixedly connected to the output end through the connecting post (11). Four storage slots (14) are opened on the outside of the cutting head (13). Four hydraulic motors (15) are fixedly connected inside the cutting head (13). The output end of the hydraulic motor (15) extends into the storage slot (14), and a cutting blade (16) is fixedly connected to the output end of the hydraulic motor (15). Oil storage chambers (17) are opened at the bottom of the connecting post (11) and the top of the cutting head (13). Two sealing slots (19) are opened at the top of the cutting head (13). Two sealing rings (18) are fixedly connected to the bottom of the connecting post (11).

2. The well casing string electromechanical cutting tool according to claim 1, characterized in that: The swing arm (5) is connected to a limit post (6) through and rotatably, and both ends of the limit post (6) are fixedly connected to the through groove (3).

3. The well casing string electromechanical cutting tool according to claim 1, characterized in that: A slider (10) is slidably connected in the groove (9), and the slider (10) is fixedly connected to both sides of the end of the swing arm (5).

4. The well casing electric mechanical cutting tool according to claim 1, characterized in that: The cutting blade (16) is disposed in the storage slot (14).

5. The well casing string electromechanical cutting tool according to claim 1, characterized in that: The sealing groove (19) is located on both sides of the oil storage chamber (17).

6. The well casing electric mechanical cutting tool according to claim 1, characterized in that: The sealing ring (18) is disposed on both sides of the oil storage cavity (17) and is disposed in the sealing groove (19).

7. The well casing string electromechanical cutting tool according to claim 1, characterized in that: A sealing ring (20) is fixedly connected inside the sealing groove (19).

8. The well casing electric mechanical cutting tool according to claim 1, characterized in that: A cylinder (21) is fixedly connected inside the fixed column (1), and the output end of the cylinder (21) is fixedly connected to the pull rod (4).

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