Protective casing for geothermal well

Abstract

The utility model discloses a protective casing for geothermal well, it includes clamping subassembly, clamping subassembly includes frame, the frame circumference outer wall is provided with support subassembly, the frame inside is provided with buffer assembly, this kind of protective casing for geothermal well, optimization clamping mechanism, have designed the jaw clamping mechanism of sliding frame connecting rod drive in the semicircular frame inside, through the rotation sliding frame can drive jaw to unfold, realize reliable clamping to pipeline, effectively promote the adaptability of this clamping mechanism to different size pipeline, secondly, design multiple buffer structure, set up the composite buffer structure of connecting plate, buffer pad and disc spring group in the contact surface of jaw and pipeline, effectively reduce the vibration buffering of further improving the adaptive clamping force of jaw, add buffer pad in the contact surface of the sliding slot inner wall and sliding frame, and the double radial spring structure is adopted to gyro wheel mechanism, and combines the gyro wheel surface with matched scraper design with recess, effectively improves the vibration reduction performance.

Description

Technical Field

[0001] This utility model relates to the field of geothermal well protection technology, specifically a protective casing for geothermal wells. Background Technology

[0002] Geothermal wells are engineering facilities that drill deep underground to obtain geothermal energy or hot spring water resources with a temperature >30℃. In order to reinforce the well wall and reduce heat energy transmission loss, protective casings are often installed inside the geothermal well.

[0003] Existing patent document CN219953256U discloses a protective casing for geothermal wells, comprising two sets of elastic clamping components and a locking structure. The two sets of elastic clamping components form a cylindrical cavity through which the pump pipe passes, and both sets elastically abut against the outer wall of the pump pipe to clamp it. The locking structure locks the two sets of combined elastic clamping components. Multiple sets of connecting components are provided, each set spaced around the axis of the cylindrical cavity on a collar structure. Each set of connecting components elastically abuts and rolls against the well casing during the lifting or lowering of the pump pipe. This utility model provides a protective casing for geothermal wells that aims to solve the problem in the prior art where the pump pipe directly and rigidly contacts the geothermal well casing, easily causing damage to the well casing and affecting the lifespan of the geothermal well.

[0004] Although the device has many beneficial effects, the following problems still exist: The elastic clamping assembly forms a cylindrical cavity by enclosing two sets of clamping structures, but if the pump tube has a large size error or an irregular shape, the clamping force may not be evenly distributed by elastic contact alone, which may cause the pump tube to deviate slightly or vibrate during movement. Secondly, the elastic element of the elastic clamping assembly may experience elastic decay due to fatigue or high temperature environment downhole after long-term use, which will reduce the clamping effect, and there is a lack of vibration damping structure. Utility Model Content

[0005] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.

[0006] 1. Technical problems to be solved:

[0007] To address the aforementioned problems of insufficient clamping stability and limited dynamic adaptability, this utility model is proposed.

[0008] Therefore, the purpose of this utility model is to provide a protective casing for geothermal wells, which optimizes the clamping mechanism. An innovative clamping mechanism driven by a sliding frame linkage is designed inside a semi-circular frame. Rotating the sliding frame unfolds the clamps, enabling reliable clamping of the pipe and effectively improving the adaptability of the clamping mechanism to pipes of different sizes. Simultaneously, a multi-buffered structure is designed, with a composite buffer structure consisting of a connecting plate, buffer pad, and disc spring assembly on the contact surface between the clamps and the pipe. This effectively reduces vibration and further enhances the adaptive clamping force of the clamps. A buffer pad is added to the contact surface between the inner wall of the slide groove and the sliding frame. The roller mechanism adopts a double radial spring structure, combined with a grooved roller surface and a matching scraper design, effectively improving vibration reduction performance.

[0009] 2. Technical Solution:

[0010] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0011] A protective casing for geothermal wells includes a clamping assembly comprising a frame, a sliding frame, a connecting rod, and grippers. A support assembly is provided on the outer circumference of the frame, comprising a mounting bracket, rollers, and a scraper. A buffer assembly is provided inside the frame, comprising a disc spring assembly, a buffer pad one, a buffer pad two, and a spring three.

[0012] In a preferred embodiment of the protective casing for geothermal wells according to this utility model, the clamping assembly includes mounting feet, the sidewalls of which are integrally formed and connected to the frame. A sliding groove is provided at the bottom of the inner cavity of the frame, the inner sidewall of which is slidably connected to the sliding frame. The sidewall of the sliding frame is hinged to the connecting rod, the other end of which is hinged to the gripper, and the bottom of the gripper is hinged to the frame.

[0013] In a preferred embodiment of the protective casing for geothermal wells according to this utility model, the support assembly includes a connecting rod, a telescopic rod inserted into the side wall of the connecting rod, a second spring sleeved on the outer circumference of the telescopic rod, the output end of the second spring and the output end of the telescopic rod being fixedly connected to the mounting frame, a rotating shaft hinged to the inner side wall of the mounting frame, a roller sleeved on the outer circumference of the rotating shaft, a scraper welded to the inner side wall of the mounting frame, and the side wall of the scraper fitting against the roller.

[0014] In a preferred embodiment of the protective casing for geothermal wells according to this utility model, the buffer assembly includes a connecting plate, the side wall of the connecting plate is fixedly connected to the disc spring assembly, the side wall of the disc spring assembly is fixedly connected to the clamp, the other end of the connecting plate is fixedly connected to the buffer pad one, the inner side wall of the sliding groove is bonded to the buffer pad two, and a plurality of springs three are sleeved on the outer circumference of the rotating shaft, one end of the spring three is attached to the mounting bracket, and the other end of the spring three is attached to the roller.

[0015] As a preferred embodiment of the protective casing for geothermal wells of this utility model, the frame is a semi-circular structure, the sliding frame is an arc-shaped structure, a square groove is provided on the inner side wall of the frame cavity, a spring is fixedly connected to the inner side wall of the square groove, a locking block is welded to the output end of the spring, a lever is welded to the top of the locking block, multiple helical teeth are attached to the side wall of the locking block, the side wall of the helical teeth is integrally formed and connected to the sliding frame, and a sliding plate is integrally formed and connected to the top of the sliding frame.

[0016] As a preferred embodiment of the protective casing for geothermal wells of this utility model, the outer circumferential wall of the roller is provided with multiple annular grooves, and the side wall of the scraper is integrally formed with multiple scraping teeth.

[0017] In a preferred embodiment of the protective casing for geothermal wells according to this utility model, the sidewall of the clamp is provided with a connecting groove, the connecting groove is a polygonal structure, and the sidewall of the connecting groove is provided with a connecting hole.

[0018] 3. Beneficial effects:

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] This type of protective casing for geothermal wells features an optimized clamping mechanism. An innovative design incorporates a claw clamping mechanism driven by a sliding frame linkage within a semi-circular frame. Rotating the sliding frame unfolds the claws, enabling reliable clamping of the pipe and effectively improving the adaptability of the clamping mechanism to pipes of different sizes. Additionally, a helical toothed anti-reverse structure is designed on the back side of the sliding frame to further enhance the clamping stability of the mechanism.

[0021] This type of protective casing for geothermal wells features a multi-buffered design. A composite buffer structure consisting of a connecting plate, a buffer pad, and a disc spring assembly is installed at the contact surface between the clamps and the pipe. This effectively reduces vibration and further enhances the adaptive clamping force of the clamps. A buffer pad is added to the contact surface between the inner wall of the chute and the sliding frame. The roller mechanism adopts a double radial spring structure, allowing the rollers to make small-range radial offsets. Combined with the grooved roller surface and the matching scraper design, the vibration reduction performance is effectively improved. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0023] Figure 1 This is a schematic diagram of the overall structure of a protective casing for geothermal wells according to this utility model;

[0024] Figure 2 This is a schematic diagram of the second integral structure of a protective casing for geothermal wells according to this utility model;

[0025] Figure 3 This is a schematic diagram of the clamping assembly structure for a protective casing for a geothermal well according to the present invention;

[0026] Figure 4 This is a schematic diagram of the support component structure of a protective casing for a geothermal well according to the present invention;

[0027] Figure 5 This is a schematic diagram of the clamp structure of a protective casing for geothermal wells according to this utility model.

[0028] The following are the labeling instructions in the diagram: 100, clamping assembly; 110, frame; 111, locking block; 112, lever; 113, spring one; 114, mounting foot; 120, sliding frame; 121, sliding plate; 122, helical tooth; 130, connecting rod; 140, gripper; 141, connecting groove; 200, support assembly; 210, connecting rod; 220, telescopic rod; 230, spring two; 240, mounting bracket; 250, roller; 260, scraper; 300, buffer assembly; 310, disc spring assembly; 320, connecting plate; 330, buffer pad one; 340, buffer pad two; 350, spring three. Detailed Implementation

[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0030] This utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not be construed as limiting the scope of protection of this utility model. In actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0031] The orientation or positional relationship indicated in the terminology is based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing the present invention and simplifying the description. It is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0032] The term "connection method" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] The embodiments of this utility model will now be described in further detail with reference to the accompanying drawings.

[0034] This utility model provides an overall structural schematic diagram of an embodiment of a protective casing for geothermal wells, including:

[0035] Please see Figures 1-5 A protective casing for a geothermal well according to this embodiment includes a clamping assembly 100, which includes a frame 110, a sliding frame 120, a connecting rod 130, and a gripper 140. A support assembly 200 is provided on the outer circumference of the frame 110. The support assembly 200 includes a mounting frame 240, a roller 250, and a scraper 260. A buffer assembly 300 is provided inside the frame 110. The buffer assembly 300 includes a disc spring assembly 310, a first buffer pad 330, a second buffer pad 340, and a third spring 350.

[0036] It is worth noting that, in order to facilitate clamping the pipe, the clamping assembly 100 specifically includes a mounting foot 114, the side wall of the mounting foot 114 is integrally formed with a frame 110, the bottom of the inner cavity of the frame 110 is provided with a sliding groove, the inner side wall of the sliding groove is slidably connected to a sliding frame 120 for driving the gripper 140 to unfold, the side wall of the sliding frame 120 is hinged to a connecting rod 130, the other end of the connecting rod 130 is hinged to the gripper 140, and the bottom of the gripper 140 is hinged to the frame 110.

[0037] Next, to support the frame 110, specifically, the support assembly 200 includes a connecting rod 210, the frame 110 is welded to the side wall of the connecting rod 210, a telescopic rod 220 is inserted into the side wall of the connecting rod 210, a spring 230 is sleeved on the outer circumference of the telescopic rod 220, a mounting bracket 240 is welded to the output end of the spring 230 and the output end of the telescopic rod 220, a pivot is hinged to the inner side wall of the mounting bracket 240, a roller 250 is sleeved on the outer circumference of the pivot, a scraper 260 is welded to the inner side wall of the mounting bracket 240, and the side wall of the scraper 260 is in contact with the roller 250.

[0038] Meanwhile, in order to buffer vibration energy, specifically, the buffer assembly 300 includes a connecting plate 320, a disc spring assembly 310 fixedly connected to the side wall of the connecting plate 320, a clamp 140 fixedly connected to the side wall of the disc spring assembly 310, and a buffer pad 330 fixedly connected to the other end of the connecting plate 320 for buffering vibration between the clamp 140 and the pipe. A second buffer pad 340 is bonded to the inner side wall of the slide groove for buffering vibration between the sliding frame 120 and the frame 110. Multiple third springs 350 are sleeved on the outer circumference of the rotating shaft. One end of the third spring 350 is attached to the mounting bracket 240, and the other end of the third spring 350 is attached to the roller 250 to facilitate radial displacement of the roller 250 for buffering vibration between the roller 250 and the well pipe.

[0039] Furthermore, to improve the clamping stability of the clamping assembly 100, specifically, the frame 110 has a semi-circular structure, the sliding frame 120 has an arc-shaped structure, the inner cavity sidewall of the frame 110 is provided with a square groove, the inner sidewall of the square groove is fixedly connected with a spring 113 for resetting the locking block 111, the output end of the spring 113 is welded to the locking block 111, the top of the locking block 111 is welded with a lever 112, the sidewall of the locking block 111 is fitted with multiple helical teeth 122 for cooperating with the locking block 111 to prevent reverse rotation, the sidewall of the helical teeth 122 is integrally formed and connected to the sliding frame 120, and the top of the sliding frame 120 is integrally formed and connected to the slide plate 121.

[0040] It is worth noting that, in order to avoid the roller 250 getting stuck, the outer circumference of the roller 250 is provided with multiple annular grooves, and the side wall of the scraper 260 is integrally formed with multiple scraping teeth for cleaning the roller 250.

[0041] Finally, to facilitate the folding and unfolding of the gripper 140, specifically, the side wall of the gripper 140 is provided with a connecting groove 141. The connecting groove 141 has a polygonal structure to facilitate the connection of the connecting rod 130. The side wall of the connecting groove 141 is provided with a connecting hole.

[0042] In addition, the circuits, electronic components and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the internal structure and method.

[0043] Combination Figures 1-5 The specific usage process of a protective casing for geothermal wells according to this embodiment is as follows:

[0044] 1: Place two semi-circular frames 110 on both sides of the pipe respectively, and then fix the two frames 110 together with bolts. Then slide the sliding plate 121 to drive the sliding frame 120 to slide. The sliding frame 120 drives the clamps 140 to unfold through the connecting rod 130. Then the four clamps 140 clamp and fix the pipe.

[0045] 2: After the pipe is clamped, adjust the position of the frame 110 so that the four connecting rods 210 on the outer circumference of the frame 110 are in a horizontal position. Then, the roller 250 is pressed against the inner wall of the geothermal well pipe by the pre-tightening force of the spring 230, and can be adjusted vertically.

[0046] 3: When the pipeline vibrates, the buffer pad 1 on the side wall of the gripper and the disc spring assembly first absorb the vibration energy. The buffer pad 2 340 bonded to the inner side wall of the slide inside the frame 110 buffers and protects the frame 110 and the sliding frame 120. Finally, the spring 3 350 on both sides of the roller 250 facilitates the roller 250 to generate a small radial displacement to disperse the vibration energy when vibrating.

[0047] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A protective casing for geothermal wells, characterized in that, The device includes a clamping assembly (100), which includes a frame (110), a sliding frame (120), a connecting rod (130), and a gripper (140). A support assembly (200) is provided on the outer circumference of the frame (110). The support assembly (200) includes a mounting bracket (240), a roller (250), and a scraper (260). A buffer assembly (300) is provided inside the frame (110). The buffer assembly (300) includes a disc spring assembly (310), a first buffer pad (330), a second buffer pad (340), and a third spring (350).

2. The protective casing for geothermal wells according to claim 1, characterized in that, The clamping assembly includes a mounting foot (114), the side wall of which is integrally formed and connected to the frame (110). The bottom of the inner cavity of the frame (110) is provided with a sliding groove, the inner side wall of which is slidably connected to the sliding frame (120). The side wall of the sliding frame (120) is hinged to the connecting rod (130), the other end of the connecting rod (130) is hinged to the gripper (140), and the bottom of the gripper (140) is hinged to the frame (110).

3. The protective casing for geothermal wells according to claim 2, characterized in that, The support assembly (200) includes a connecting rod (210), a telescopic rod (220) is inserted into the side wall of the connecting rod (210), a spring (230) is sleeved on the outer circumference of the telescopic rod (220), the output end of the spring (230) and the output end of the telescopic rod (220) are both fixedly connected to the mounting frame (240), the inner side wall of the mounting frame (240) is hinged to a rotating shaft, the outer circumference of the rotating shaft is sleeved with the roller (250), the inner side wall of the mounting frame (240) is welded with the scraper (260), and the side wall of the scraper (260) is attached to the roller (250).

4. The protective casing for geothermal wells according to claim 3, characterized in that, The buffer assembly (300) includes a connecting plate (320), the side wall of which is fixedly connected to the disc spring assembly (310), the side wall of which is fixedly connected to the gripper (140), the other end of which is fixedly connected to the buffer pad one (330), the inner side wall of which is bonded to the buffer pad two (340), and a plurality of springs three (350) sleeved on the outer circumference of the rotating shaft, one end of which is attached to the mounting bracket (240), and the other end of which is attached to the roller (250).

5. The protective casing for geothermal wells according to claim 2, characterized in that, The frame (110) has a semi-circular structure, and the sliding frame (120) has an arc-shaped structure. The inner cavity sidewall of the frame (110) has a square groove. The inner sidewall of the square groove is fixedly connected to a spring (113). The output end of the spring (113) is welded to a locking block (111). The top of the locking block (111) is welded to a lever (112). The sidewall of the locking block (111) is fitted with multiple helical teeth (122). The sidewall of the helical teeth (122) is integrally formed and connected to the sliding frame (120). The top of the sliding frame (120) is integrally formed and connected to a sliding plate (121).

6. The protective casing for geothermal wells according to claim 3, characterized in that, The roller (250) has multiple annular grooves on its outer circumference, and the scraper (260) has multiple scraping teeth integrally formed on its side wall.

7. The protective casing for geothermal wells according to claim 2, characterized in that, The gripper (140) has a connecting groove (141) on its side wall. The connecting groove (141) has a polygonal structure and a connecting hole is provided on its side wall.

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