Sand washing device for sandstone geothermal well

Abstract

The utility model belongs to the technical field of geothermal wells, and particularly relates to a sandstone geothermal well sand washing device which comprises a sand washing device body, a fixing block is fixedly connected to the sand washing device body, a sliding rod is connected to the interior of the fixing block in a sliding mode, a guide block is fixedly connected to the sliding rod, and the interior of the fixing block is connected with the guide block in a sliding mode. A connecting block is fixedly connected to one end of the sliding rod, and a limiting block is rotationally connected into the fixing block. By arranging the connecting block, the limiting sleeve, the threaded rod and the like, the limiting sleeve and the threaded rod can make threaded motion by rotating the limiting sleeve, so that the threaded rod drives the connecting block to move, the position of the connecting block can be adjusted, and the sand washing device body is suitable for well mouths of different specifications; the problems that a sandstone geothermal well sand washing device cannot be suitable for well mouths of different specifications when used, and instability is caused when the sandstone geothermal well sand washing device is placed are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of geothermal wells, in particular to a sandstone geothermal well sand flushing device. Background Art

[0002] Due to the loose structure and poor cementation performance of some sandstone geothermal wells, many wells have the phenomenon of sand burying the thermal reservoir after sand is produced during the production process, resulting in a decrease in the production capacity of the production wells and a decrease in the recharge volume year by year. Therefore, it is necessary to carry out sand flushing operations on the geothermal wells to remove the sand deposited in the wellbore in time and restore the production capacity of the formation. According to the utility model with the patent authorization announcement number CN216588511U, a sandstone geothermal well sand flushing device is disclosed. The sandstone geothermal well sand flushing device includes a sand flushing pipe column, a ground sand discharge system and a gas injection system. The sand flushing pipe column is arranged in the geothermal well, and the bottom end extends to the surface of the sand deposited in the geothermal well. The top of the sand flushing pipe column is connected to the ground sand discharge system, and the gas injection system is connected to the bottom side wall of the sand flushing pipe column, which is used to inject gas into the sand flushing pipe column. The sandstone geothermal well sand flushing device involved in the utility model injects gas into the sand flushing pipe column to cause a pressure difference between the inside and outside of the sand flushing pipe column, so that the sand flushing pipe column produces a siphon effect at the bottom, and the sediment in the wellbore is automatically sucked into the sand flushing pipe column under the action of the pressure difference between the inside and outside, and is lifted to the ground by gas and discharged through the ground sand discharge system. The device has low investment cost, good sand flushing effect, strong sand carrying capacity, short cycle, and will not cause secondary pollution to the formation. However, the sandstone geothermal well sand flushing device cannot be used for wellheads of different specifications when used, which will cause instability when placed. Summary of the invention

[0003] The utility model aims to provide a sandstone geothermal well sand flushing device, which solves the problem that the sandstone geothermal well sand flushing device cannot be applied to wellheads of different specifications when in use, and causes instability when placed.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a sandstone geothermal well sand flushing device, comprising a sand flushing device body, a fixed block fixedly connected to the sand flushing device body, a sliding rod slidably connected inside the fixed block, a guide block fixedly connected to the sliding rod, a guide block slidably connected inside the fixed block, one end of the sliding rod fixedly connected to the connecting block, the internal rotation of the fixed block is connected to a limiting block, one end of the limiting block is fixedly connected to a limiting sleeve, a threaded rod fixedly connected to the connecting block, a connecting plate slidably connected inside the connecting block, a positioning column fixedly connected to the connecting plate, a positioning column slidably connected inside the connecting block, a rotating rod rotatably connected inside the connecting block, a baffle fixedly connected to the rotating rod, and the baffle is in contact with the connecting block.

[0005] Preferably, a protrusion is fixedly connected to the limit block, an annular groove is provided on the fixed block, and a protrusion is slidably connected inside the annular groove. Through the design of the annular groove, the protrusion can cooperate with the limit block to play a limiting role.

[0006] Preferably, the limiting sleeve is in contact with the fixing block, and the limiting sleeve is in contact with the connecting block. The position of the threaded rod can be adjusted through the design of the limiting sleeve.

[0007] Preferably, the threaded rod is connected to the limiting sleeve via threads, and the threaded rod is movably connected to the limiting block. The design of the threaded rod can drive the connecting block to move.

[0008] Preferably, one end of the threaded rod is fixedly connected to a limiting plate, and the limiting plate is slidably connected to the fixed block. The limiting plate can play a limiting role on the threaded rod through the design of the limiting plate.

[0009] Preferably, one end of the rotating rod is fixedly connected to a knob, the knob is in contact with a connecting block, a guide rod is fixedly connected to the connecting block, and the guide rod is slidably connected to the connecting plate. The rotating rod can be easily rotated through the design of the knob.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0011] 1. The utility model is provided with a connecting block, a limiting sleeve, a threaded rod and other components. The limiting sleeve can be rotated to make the limiting sleeve and the threaded rod perform threaded movement, so that the threaded rod drives the connecting block to move, thereby adjusting the position of the connecting block, so that the main body of the sand flushing device is suitable for wellheads of different specifications, solving the problem that the sand flushing device for sandstone geothermal wells cannot be used for wellheads of different specifications when in use, which will cause instability when placed.

[0012] 2. The utility model is provided with a connecting plate, a positioning column, a rotating rod and other components. By rotating the rotating rod, the rotating rod and the connecting plate can undergo threaded motion, so that the connecting plate drives the positioning column to be inserted into the ground, so that the main body of the sand flushing device can be more stable when placed. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0014] Figure 2 For the utility model Figure 1 A magnified top view of the local structure;

[0015] Figure 3 For the utility model Figure 2 A magnified view of the structure of part A;

[0016] Figure 4For the utility model Figure 1 A magnified front view of the local structure.

[0017] In the figure: 1. sand blasting device body; 2. fixed block; 21. slide rod; 22. guide block; 3. connecting block; 4. limit block; 41. protrusion; 42. annular groove; 43. limit sleeve; 44. threaded rod; 45. limit plate; 5. connecting plate; 51. positioning column; 52. rotating rod; 53. baffle; 54. knob; 55. guide rod. DETAILED DESCRIPTION

[0018] 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.

[0019] See also Figure 1-4 A sandstone geothermal well sand flushing device comprises a sand flushing device body 1, a fixed block 2 is fixedly connected to the sand flushing device body 1, a sliding rod 21 is slidably connected inside the fixed block 2, a guide block 22 is fixedly connected to the sliding rod 21, the fixed block 2 is slidably connected inside the guide block 22, one end of the sliding rod 21 is fixedly connected to a connecting block 3, the fixed block 2 is internally rotatably connected to a limiting block 4, a protrusion 41 is fixedly connected to the limiting block 4, an annular groove 42 is provided on the fixed block 2, the protrusion 41 is slidably connected inside the annular groove 42, and the protrusion 41 can be cooperated with the protrusion 41 to limit the limiting block 4 through the design of the annular groove 42.

[0020] See also Figure 2-4 One end of the limit block 4 is fixedly connected to the limit sleeve 43, the limit sleeve 43 contacts the fixed block 2, and the limit sleeve 43 contacts the connecting block 3. Through the design of the limit sleeve 43, the position of the threaded rod 44 can be adjusted. The connecting block 3 is fixedly connected with a threaded rod 44, the threaded rod 44 is connected to the limit sleeve 43 by threads, and the threaded rod 44 is movably connected to the limit block 4. Through the design of the threaded rod 44, the connecting block 3 can be driven to move. One end of the threaded rod 44 is fixedly connected to the limit plate 45, and the limit plate 45 is slidably connected to the fixed block 2. Through the design of the limit plate 45, the threaded rod 44 can be limited.

[0021] See also Figure 2-4The connecting block 3 is internally slidably connected to a connecting plate 5, and a positioning column 51 is fixedly connected to the connecting plate 5. The connecting block 3 is internally slidably connected to the positioning column 51. The connecting block 3 is internally rotatably connected to a rotating rod 52, and a baffle 53 is fixedly connected to the rotating rod 52. The baffle 53 contacts the connecting block 3. One end of the rotating rod 52 is fixedly connected to a knob 54, and the knob 54 contacts the connecting block 3. A guide rod 55 is fixedly connected to the connecting block 3, and the guide rod 55 is slidably connected to the connecting plate 5. Through the design of the knob 54, the rotating rod 52 can be easily rotated.

[0022] The specific implementation process of the utility model is as follows: when in use, by rotating the limiting sleeve 43, the limiting sleeve 43 and the threaded rod 44 are threadedly moved, so that the limiting sleeve 43 and the threaded rod 44 are threadedly moved, so that the threaded rod 44 drives the connecting block 3 to move, so that the position of the connecting block 3 can be adjusted, and the distance between the connecting block 3 and the fixed block 2 can be adjusted, so that the sand flushing device body 1 can be suitable for wellheads of different specifications, and by rotating the knob 54, the knob 54 drives the rotating rod 52 to rotate, so that the rotating rod 52 and the connecting plate 5 are threadedly moved, so that the connecting plate 5 slides on the guide rod 55, so that the connecting plate 5 drives the positioning column 51 to move, and the positioning column 51 is inserted into the ground, thereby limiting the connecting block 3, so that the sand flushing device body 1 remains stable when placed.

[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sandstone geothermal well sand flushing device, comprising a sand flushing device body (1), characterized in that: The sand flushing device body (1) is fixedly connected to a fixed block (2), the fixed block (2) is slidably connected to a slide rod (21), the slide rod (21) is fixedly connected to a guide block (22), the fixed block (2) is slidably connected to the guide block (22), one end of the slide rod (21) is fixedly connected to a connecting block (3), the fixed block (2) is rotatably connected to a limit block (4), one end of the limit block (4) is fixedly connected to a limit sleeve (43), the connecting block (3) is fixedly connected to a threaded rod (44), the connecting block (3) is slidably connected to a connecting plate (5), the connecting plate (5) is fixedly connected to a positioning column (51), the connecting block (3) is slidably connected to the positioning column (51), the connecting block (3) is rotatably connected to a rotating rod (52), the rotating rod (52) is fixedly connected to a baffle (53), and the baffle (53) contacts the connecting block (3).

2. A sandstone geothermal well sand flushing device according to claim 1, characterized in that: A protrusion (41) is fixedly connected to the limiting block (4), an annular groove (42) is provided on the fixing block (2), and the protrusion (41) is slidably connected inside the annular groove (42).

3. A sandstone geothermal well sand flushing device according to claim 1, characterized in that: The limiting sleeve (43) is in contact with the fixing block (2), and the limiting sleeve (43) is in contact with the connecting block (3).

4. A sandstone geothermal well sand flushing device according to claim 1, characterized in that: The threaded rod (44) is connected to the limiting sleeve (43) via threads, and the threaded rod (44) is movably connected to the limiting block (4).

5. The sandstone geothermal well sand flushing device according to claim 1, characterized in that: One end of the threaded rod (44) is fixedly connected to a limiting plate (45), and the limiting plate (45) is slidably connected to the fixed block (2).

6. The sandstone geothermal well sand flushing device according to claim 1, characterized in that: One end of the rotating rod (52) is fixedly connected to a knob (54), the knob (54) is in contact with the connecting block (3), the connecting block (3) is fixedly connected to a guide rod (55), and the guide rod (55) is slidably connected to the connecting plate (5).

Images