Recovery device suitable for investigation casing pipes of different specifications
By designing a recycling device including a center rod, a tie rod and a sleeve clamping assembly, the problems of high cost and poor applicability in the survey sleeve recycling process in the prior art are solved, and efficient recycling of different specifications and damaged sleeves is achieved.
Patent Information
- Application Number
- CN202421956018.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-12
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-08-12
AI Technical Summary
In the prior art, during the extraction and recycling of the survey casing, multiple specifications of taps are required, which are costly and difficult to adapt to different geological conditions and damage to the casing, resulting in failure of recycling.
A recycling device including a center rod, tie rod and casing joint assembly is designed, connected to the drill rod through a threaded joint, and the semi-month-shaped clamping block and tie rod control of the casing joint assembly is realized effectively for different specifications and damaged casings.
This device can be suitable for various types of sleeves, especially in the case of damaged sleeves. Through the automatically opened and closed clamping blocks, a tight connection with the inner wall of the sleeve is achieved, improving the success rate and efficiency of recycling.
Smart Images
Figure CN222823205U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of exploration casing recovery, in particular to a recovery device suitable for exploration casings of different specifications. Background Art
[0002] At present, for engineering geological drilling construction in loose strata, casing is often used to protect the wall. After the drilling construction is completed, the casing recovery process mainly uses taps for pulling and recovery.
[0003] The existing use of taps to pull out and recover exploration casing has the following defects: (1) Different technical requirements and different geological conditions often require the use of casing of different models and specifications, so it is necessary to equip taps of various specifications, which requires a large number of instruments and is costly; (2) When the casing interface is curled and deformed, the tap cannot be connected to the casing, or cannot be tightly connected, which is prone to accidents and leads to recovery failure; (3) The thread of the casing may be damaged after repeated use, and the tap is easy to fall off from the connection during the recovery process. After falling off multiple times, the tap cannot be properly connected to the casing, resulting in recovery failure. Utility Model Content
[0004] In view of the shortcomings of the above technologies, the utility model provides a recovery device suitable for exploration casings of different specifications. The device can be used for pulling out various types of exploration casings, and can solve the problems of pulling out various types of casings at a fixed point in a borehole and pulling out damaged casings in the prior art.
[0005] To achieve the above-mentioned purpose, the utility model provides a recovery device suitable for exploration casings of different specifications, the recovery device comprising a center rod, a pull rod and a casing clamping assembly, the upper end of the center rod is provided with a threaded joint for connecting with a drill pipe, a vertical slide groove is opened on the center rod, the pull rod is slidably installed in the vertical slide groove, the casing clamping assembly is provided with two groups, the two groups of casing clamping assemblies are vertically distributed at the lower part of the center rod, each group of casing clamping assemblies includes two rotatably connected half-moon or arc-shaped clamping blocks, the pull rod is respectively connected to the two clamping blocks of each group of casing clamping assemblies by a pull rope, and when the pull rod slides upward along the vertical slide groove, the two clamping blocks of the two groups of casing clamping assemblies are driven to rotate upward and retract; or when the pull rod slides downward along the vertical slide groove, the two clamping blocks of the two groups of casing clamping assemblies are rotated downward and opened.
[0006] The better technical solution of the utility model is as follows: one end of the two clamping blocks of each set of sleeve clamping assemblies is connected to the center rod through a connecting shaft, the two clamping blocks are rotatably installed on the connecting shaft, and the two clamping blocks are symmetrically arranged with the connecting shaft as the center, and a spring is provided between the two clamping blocks, the spring is sleeved on the connecting shaft, and its two ends are respectively connected to the two clamping blocks, and under the action of the spring, the two clamping blocks automatically open.
[0007] The better technical solution of the utility model is as follows: the vertical slide groove is arranged in the middle and upper part of the center rod, and the vertical slide groove is a hollow slide groove, the pull rod passes through the vertical slide groove, and is slidably installed in the vertical slide groove, the pull rod is provided with an extension control rope, and the control rope extends upward along the inner wall or outer wall of the center rod, and after the recovery device is placed on the exploration casing, the control rope extends to the drilling hole mouth.
[0008] The better technical solution of the utility model is as follows: one set of sleeve clamping assemblies is installed at the bottom end of the center rod, and the other set of sleeve clamping assemblies is placed above the sleeve clamping assemblies at the bottom end, and the two sets of sleeve clamping assemblies are arranged perpendicular to each other.
[0009] The preferred technical solution of the utility model is that the arc surfaces of the two clamping blocks of each set of sleeve clamping assemblies face downward, and the pull rod is connected to one end of the two clamping blocks of the same set of sleeve clamping assemblies away from the connecting shaft through two pull ropes.
[0010] The preferred technical solution of the utility model is as follows: the connecting shafts of the two sets of sleeve clamping assemblies are vertically arranged, and the connecting shaft and the two clamping blocks are rotatably mounted on both sides of the corresponding connecting shafts.
[0011] The utility model has the following beneficial effects:
[0012] The utility model can be connected with an external drill pipe through a joint, and the casing recovery device is sent into the casing to be pulled out as a whole. A half-moon wheel-shaped casing clamping assembly is installed on the central pipe. The casing clamping assembly is provided with two half-moon or arc-shaped clamping blocks. The two half-moon or arc-shaped clamping blocks can be controlled by a pull rod to open at different angles and fit tightly with the inner wall of the casing, so that the utility model can be applicable to various types of casings when pulling out the casing, and is more convenient and effective when pulling out the damaged casing. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a front view schematic diagram of the three-dimensional structure of the utility model;
[0014] Figure 2 It is a side schematic diagram of the three-dimensional structure of the utility model;
[0015] Figure 3 This is a schematic diagram of the assembly of the half-moon wheel of the utility model;
[0016] Figure 4 This is a schematic diagram of the pull rod of the utility model in the lifting state;
[0017] Figure 5 It is a reference diagram of the use status of the utility model.
[0018] Figure numerals: 1—joint; 2—center rod; 3—pull rod; 4—pull rope; 5—clamping block; 6—connecting shaft; 7—vertical slide groove, 8—spring, 9—control rope, 10—sleeve, 11—drill hole. DETAILED DESCRIPTION
[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0020] The embodiment provides a recovery device suitable for exploration casings of different specifications, such as Figures 1 to 3 As shown, the recovery device includes a center rod 2, a pull rod 3 and a casing clamping assembly. The upper end of the center rod 2 is provided with a threaded joint 1 for connecting to a drill pipe. A vertical slide groove 7 is opened on the center rod 3. The pull rod 3 is slidably installed in the vertical slide groove 7. The casing clamping assembly is provided with two groups, and the two groups of casing clamping assemblies are vertically distributed at the lower part of the center rod 2. One group of casing clamping assemblies is installed at the bottom end of the center rod 3, and the other group of casing clamping assemblies is placed above the bottom end casing clamping assembly, and the two groups of casing clamping assemblies are arranged vertically to each other. Each set of sleeve clamping assemblies includes two half-moon or arc-shaped clamping blocks 5 that are rotatably connected. One end of the two clamping blocks 5 of each set of sleeve clamping assemblies is connected to the center rod 3 through a connecting shaft 6. The two clamping blocks 5 are rotatably mounted on the connecting shaft 6, and the two clamping blocks 5 are symmetrically arranged with the connecting shaft 6 as the center. A spring 8 is provided between the two clamping blocks 5. The spring 8 is sleeved on the connecting shaft 6, and its two ends are respectively connected to the two clamping blocks 5. Under the action of the spring 8, the two clamping blocks 5 automatically open. The connecting shafts 6 of the two sets of sleeve clamping assemblies are vertically arranged, and the connecting shafts 6 and the two clamping blocks 5 are respectively rotatably mounted on both sides of the corresponding connecting shafts 6, and the arc surfaces of the two clamping blocks 5 of each set of sleeve clamping assemblies face downward.
[0021] In the embodiment, Figures 1 to 3As shown, the pull rod 3 is connected to the two clamping blocks 5 of each set of casing clamping assemblies through the pull rope 4, and when the pull rod 3 slides upward along the vertical slide groove 7, the two clamping blocks 5 of the two sets of casing clamping assemblies are driven to rotate upward and close; or when the pull rod 3 slides downward along the vertical slide groove 7, the two clamping blocks 5 of the two sets of casing clamping assemblies are rotated downward and opened. The vertical slide groove 7 is set in the middle and upper part of the center rod 2, and the vertical slide groove 7 is a hollow slide groove. The pull rod 3 passes through the vertical slide groove 7 and is slidably installed in the vertical slide groove 7. The pull rod 3 is provided with an extension control rope, which extends upward along the inner wall or outer wall of the center rod 2. After the recovery device is in the exploration casing, the control rope extends to the borehole mouth. The pull rod 3 is connected to the two clamping blocks 5 of the same set of casing clamping assemblies through two pull ropes 4 respectively. The end away from the connecting shaft 6.
[0022] When the inner sleeve 10 of the drill hole 11 needs to be pulled out, the center rod 2 is connected with the external positive thread drill pipe thread through the upper joint 1, and the control rope of the pull rod 3 is extended upward to the upper part of the drill pipe, and the pull rod 3 is pulled to slide to the uppermost end of the vertical slide groove 7 by the control rope. At this time, the two clamping blocks 5 of each set of sleeve clamping assemblies are rotated upward and closed in a closed state. At this time, the four clamping blocks 5 are retracted and overlapped in a position parallel to the center rod 2. At this time, the diameter of the sleeve clamping assembly is the smallest, which will not affect the descending process of the whole device; the whole recovery device is driven to descend along the drill hole to the sleeve where the extraction is required by the drill pipe, and then the pull rod is loosened, so that the two clamping blocks 5 of the two sets of sleeve clamping assemblies are automatically opened under the action of the spring 7, and the diameter of the sleeve clamping assembly is expanded during the opening process, and when it is in close contact with the inner wall of the sleeve 10, it will be clamped with the sleeve 10, and then it is lifted upward by the drill pipe, so as to achieve the purpose of extracting the sleeve. Since the two clamping blocks 5 of each set of casing clamping components have a change in overall diameter during the process of rotation and retraction, the casing can be suitable for the extraction of casings of different specifications.
[0023] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A recovery device suitable for exploration casings of different specifications, characterized by: The recovery device comprises a center rod (2), a pull rod (3) and a casing clamping assembly. The upper end of the center rod (2) is provided with a threaded joint (1) for connecting to a drill pipe. A vertical slide groove (7) is provided on the center rod (2). The pull rod (3) is slidably installed in the vertical slide groove (7). The casing clamping assembly is provided with two groups. The two groups of casing clamping assemblies are vertically distributed at the lower part of the center rod (2). Each group of casing clamping assemblies comprises two rotatably connected half-moon or arc-shaped clamping blocks (5). The pull rod (3) is respectively connected to the two clamping blocks (5) of each group of casing clamping assemblies through a pull rope (4). When the pull rod (3) slides upward along the vertical slide groove (7), the two clamping blocks (5) of the two groups of casing clamping assemblies are driven to rotate upward and close; or when the pull rod (3) slides downward along the vertical slide groove (7), the two clamping blocks (5) of the two groups of casing clamping assemblies are rotated downward and opened.
2. A recovery device suitable for exploration casings of different specifications according to claim 1, characterized in that: One end of the two clamping blocks (5) of each set of sleeve clamping assemblies is connected to the central rod (2) via a connecting shaft (6); the two clamping blocks (5) are rotatably mounted on the connecting shaft (6); the two clamping blocks (5) are symmetrically arranged with the connecting shaft (6) as the center; a spring (8) is provided between the two clamping blocks (5); the spring (8) is sleeved on the connecting shaft (6); two ends of the spring (8) are respectively connected to the two clamping blocks (5); and under the action of the spring (8), the two clamping blocks (5) are automatically opened.
3. A recovery device suitable for exploration casings of different specifications according to claim 1 or 2, characterized in that; The vertical slide groove (7) is arranged in the middle and upper part of the center rod (2), and the vertical slide groove (7) is a hollow slide groove. The pull rod (3) passes through the vertical slide groove (7) and is slidably installed in the vertical slide groove (7). The pull rod (3) is provided with an extension control rope (9), and the control rope extends upward along the inner wall or outer wall of the center rod (2). After the recovery device is placed on the exploration casing, the control rope (9) extends to the borehole mouth.
4. A recovery device suitable for exploration casings of different specifications according to claim 1 or 2, characterized in that: One set of sleeve clamping assemblies is installed at the bottom end of the central rod (2), and the other set of sleeve clamping assemblies is placed above the sleeve clamping assemblies at the bottom end, and the two sets of sleeve clamping assemblies are arranged perpendicularly to each other.
5. The recovery device for exploration casings of different specifications according to claim 2 is characterized in that: The arc surfaces of the two clamping blocks (5) of each set of sleeve clamping assemblies face downwards, and the pull rod (3) is connected to one end of the two clamping blocks (5) of the same set of sleeve clamping assemblies away from the connecting shaft (6) via two pull ropes (4).
6. The recovery device for exploration casings of different specifications according to claim 2 is characterized by: The connecting shafts (6) of the two sets of sleeve clamping assemblies are arranged vertically, and the connecting shaft (6) and the two clamping blocks (5) are respectively rotatably mounted on both sides of the corresponding connecting shaft (6).