Drill rod water column eliminating device for high-pressure water pressure test

Abstract

The utility model provides a drill rod water column eliminating device for a high-pressure water pressure test. The drill rod water column eliminating device comprises a fixed sleeve system and a water column pressure eliminating system, the fixed sleeve system comprises an upper sleeve and a lower sleeve; an inner cavity of the upper sleeve is communicated with an inner cavity of the lower sleeve; a water outlet hole is formed in the side wall of the upper sleeve; a round hole used for being connected with a drill rod is formed in the bottom of the lower sleeve. The device is simple in structure, convenient to transport and assemble in a narrow space, low in requirement, capable of easily eliminating the water column pressure of the high-pressure water pressure test drill rod only through hand cranking, capable of being installed through threaded connection of the drill rod, capable of reducing production cost and capable of improving production efficiency.

Description

Technical Field

[0001] This utility model belongs to the technical field of high pressure water pressure testing equipment, specifically relating to a device for eliminating water column in a high pressure water pressure test drill rod. Background Technology

[0002] With the development of engineering construction, conventional water pressure testing with a maximum pressure of 1.0 MPa can no longer meet the surveying needs of projects with pressure caverns. Only by conducting high-pressure water pressure testing according to the actual pressure borne by the surrounding rock of the cavern wall can reliable basis be provided for determining the high-pressure permeability of the rock mass, the critical fracture pressure of the surrounding rock, the characteristics of the change of rock permeability over time, and the deformation and engineering stability analysis of the rock mass under high pressure.

[0003] In the geotechnical engineering survey phase, to meet the engineering seepage prevention and design requirements, pressure water testing is generally conducted simultaneously during engineering geological drilling to obtain the permeability of the rock mass. Rock permeability is one of the important physical force parameters of the surrounding rock of a tunnel, directly related to the stability and safety of the project. Therefore, in-situ testing of rock permeability is of great significance. For general geological engineering, conventional pressure water testing at three pressure levels (0.3, 0.6, and 1.0 MPa) with five pressure stages can meet the engineering design requirements. However, in long and deep buried tunnels, especially pressure-bearing tunnels, such as high-pressure water conveyance tunnels in pumped-storage power stations, pressure-regulating chambers, and even nuclear waste disposal projects, pressure water testing with a maximum pressure of only 1.0 MPa is no longer sufficient to meet design requirements. The results of conventional pressure water testing cannot accurately reflect the permeability characteristics of the rock mass under high pressure. Therefore, engineering construction places increasingly higher demands on the testing of rock permeability. Only by conducting high-pressure pressure water testing in situ can reliable data that meets design requirements be provided.

[0004] In recent years, high-pressure water pressure testing in boreholes has been widely used in numerous geotechnical engineering surveys. High-pressure water pressure testing has stringent requirements. When encountering dry boreholes, the presence of water column pressure on the drill pipe keeps the packer in an expanded state, making it prone to jamming during drill lifting. This can cause the equipment to become stuck or even fall into the borehole, requiring prolonged depressurization and lifting, thus impacting production progress. Therefore, researching a drill pipe water column elimination device for high-pressure water pressure testing can reduce the risk of jamming and is of great significance for improving the efficiency of high-pressure water pressure testing and ensuring production progress. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a high-pressure water pressure test drill rod water column elimination device, which can effectively solve the above problems.

[0006] The technical solution adopted in this utility model is as follows:

[0007] This utility model provides a high-pressure water pressure test drill rod water column elimination device, including a fixed sleeve system and a water column pressure elimination system; the fixed sleeve system includes an upper sleeve (2) and a lower sleeve (1); the inner cavities of the upper sleeve (2) and the lower sleeve (1) are connected; the side wall of the upper sleeve (2) is provided with a water outlet hole (A1); the bottom of the lower sleeve (1) is provided with a circular hole (A2) for connecting with the drill rod;

[0008] The water column pressure relief system includes a lower one-way valve, an upper one-way valve, a connecting rod (10), and a hand crank (11); the lower one-way valve is disposed above the circular hole (A2) at the bottom of the lower sleeve (1); the upper one-way valve is disposed inside the lower sleeve (1), and the outer periphery of the upper one-way valve is sealed to the inner wall of the lower sleeve (1); the section of the lower sleeve (1) between the upper one-way valve and the lower one-way valve forms a piston-sealed space (A3); the bottom of the connecting rod (10) is fixed to the top of the upper one-way valve, and the top of the connecting rod (10) protrudes from the top of the upper sleeve (2) and is fixed to the bottom of the hand crank (11). Under the action of the hand crank (11), the connecting rod (10) is driven to move up and down, thereby driving the upper one-way valve to move up and down inside the lower sleeve (1).

[0009] Preferably, the upper sleeve (2) and the lower sleeve (1) are hollow cylinders connected by threads; the outer diameter of the upper sleeve (2) is the same as the outer diameter of the lower sleeve (1); the inner diameter of the upper sleeve (2) is smaller than the inner diameter of the lower sleeve (1).

[0010] Preferably, the lower one-way valve includes a threaded rubber ring (3), a small frustum (4), and a screw a (5);

[0011] The threaded rubber ring (3) includes an outer ring (31) and an inner ring (32); the outer ring (31) is attached above the circular hole (A2) at the bottom of the lower sleeve (1); the inner ring (32) is set inside the outer ring (31) through a connecting part (33); the inner ring (32) is threadedly connected to the small truncated cone (4) by the screw a (5).

[0012] Preferably, the diameter of the circular hole (A2) is smaller than the diameter of the inner ring (32) of the threaded rubber ring (3).

[0013] Preferably, the upper one-way valve includes a rubber gasket (6), a piston housing (7), a sealing seat (8), and a plunger valve (9);

[0014] The rubber gasket (6) is wrapped around the outside of the piston housing (7). The inner ring of the rubber gasket (6) is in contact with the piston housing (7) without any gap, and the outer ring of the rubber gasket (6) is in contact with the inner wall of the lower sleeve (1) without any gap.

[0015] The sealing seat (8) is located inside the piston housing (7) and is connected to the piston housing (7) by threads; the bottom of the sealing seat (8) has a water inlet; the top of the sealing seat (8) is equipped with the plunger valve (9); the middle part of the piston housing (7) has symmetrical water outlets.

[0016] Preferably, the upper double ears of the piston housing (7) pass through the screw b (12), and the connecting rod (10) passes through the screw b (12), thereby realizing the connection and fixation of the connecting rod (10) and the piston housing (7).

[0017] Preferably, the upper end of the connecting rod (10) is hinged to the end of the hand crank (11) by a screw c (13).

[0018] Preferably, the upper sleeve (2) has a concave frame on the upper part, and the concave frame is connected to the hand crank (11) by screw d (14) to serve as the fulcrum of the hand crank (11).

[0019] The water column elimination device for high-pressure water testing drill rods provided by this utility model has the following advantages:

[0020] In this utility model, a fulcrum is set at the hand crank, and the lever principle is used to easily and effortlessly enable the upper one-way valve to move inside the cylinder.

[0021] This utility model employs an upper and lower sleeve, with the inner diameter of the upper sleeve being smaller than that of the lower sleeve. This serves to limit the displacement of the upper one-way valve and prevent it from overflowing.

[0022] This utility model has a simple structure, is easy to transport and assemble in confined spaces, has low requirements, and can easily eliminate the water column pressure on the drill rod by hand. Installation can be completed by connecting the drill rod with threads, which reduces production costs and improves production efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a high-pressure water pressure test drill rod water column elimination device according to the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of the one-way valve provided in an embodiment of the present utility model;

[0025] Figure 3 A cross-sectional structural diagram of the upper one-way valve provided in an embodiment of this utility model;

[0026] Figure 4 A three-dimensional structural diagram of the upper check valve provided for an embodiment of this utility model;

[0027] Figure 5 This is a schematic diagram of the structure of the hand crank provided in an embodiment of the present utility model.

[0028] In the diagram: 1-Lower sleeve; 2-Upper sleeve; 3-Threaded rubber ring; 4-Small truncated cone; 5-Screw a; 6-Rubber washer; 7-Piston housing; 8-Sealing seat; 9-Plunger valve; 10-Connecting rod; 11-Hand crank; 12-Screw b; 13-Screw c; 14-Screw d; A1-Water outlet; A2-Round hole; A3-Piston sealed space; 31-Outer ring; 32-Inner ring; 33-Connecting part; Detailed Implementation

[0029] The present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the embodiments described represent only some implementations of the present invention, and not all of them. The implementation of the present invention is not limited to specific materials, structures, or steps, but can be adjusted and varied according to specific circumstances. For those skilled in the art, all other embodiments obtained without inventive work, including various modifications and variations, are within the protection scope of the present invention, as long as these modifications and variations follow the basic principles of the present invention.

[0030] This utility model provides a water column elimination device for high-pressure water pressure testing drill rods. The device has a simple structure, is easy to transport and assemble in confined spaces, has low requirements, and can easily eliminate the water column pressure of the high-pressure water pressure testing drill rod by hand-cranking. Installation can be completed through the drill rod thread connection, which reduces production costs and improves production efficiency.

[0031] like Figures 1 to 5 As shown: The device mainly consists of two parts: a fixed sleeve system and a water column pressure relief system.

[0032] See Figure 1 The fixed sleeve system includes an upper sleeve 2 and a lower sleeve 1; the inner cavities of the upper sleeve 2 and the lower sleeve 1 are connected; the side wall of the upper sleeve 2 is provided with a water outlet hole A1; and the bottom of the lower sleeve 1 is provided with a round hole A2 for connecting with a drill rod.

[0033] The upper sleeve 2 and the lower sleeve 1 are hollow cylinders connected by threads; the outer diameter of the upper sleeve 2 is the same as the outer diameter of the lower sleeve 1; the inner diameter of the upper sleeve 2 is smaller than the inner diameter of the lower sleeve 1.

[0034] The water column pressure relief system includes a lower one-way valve, an upper one-way valve, a connecting rod 10, and a hand crank 11; the lower one-way valve is located above the circular hole A2 at the bottom of the lower sleeve 1; the upper one-way valve is located inside the lower sleeve 1, specifically above the lower one-way valve and below the upper sleeve 2; the connecting rod 10 is located above the upper one-way valve, and the hand crank 11 is located outside the upper sleeve 2.

[0035] The outer periphery of the upper one-way valve is sealed to the inner wall of the lower sleeve 1; the section of the lower sleeve 1 located between the upper one-way valve and the lower one-way valve forms a piston-sealed space A3; the bottom of the connecting rod 10 is fixed to the top of the upper one-way valve, and the top of the connecting rod 10 protrudes from the top of the upper sleeve 2 and is fixed to the bottom of the hand crank 11. Under the action of the hand crank 11, the connecting rod 10 is driven to move up and down, thereby driving the upper one-way valve to move up and down inside the lower sleeve 1.

[0036] This utility model does not limit the specific structure of the one-way valve. As one specific implementation, such as Figure 2 As shown, the lower check valve includes a threaded rubber ring 3, a small frustum 4, and a screw a5;

[0037] The threaded rubber ring 3 includes an outer ring 31 and an inner ring 32; the outer ring 31 is attached above the circular hole A2 at the bottom of the lower sleeve 1; the inner ring 32 is set inside the outer ring 31 through the connecting part 33; the inner ring 32 is threadedly connected to and installed with a small round frustum 4 by a screw a5. The diameter of the circular hole A2 is smaller than the diameter of the inner ring 32 of the threaded rubber ring 3.

[0038] Since the diameter of the inner ring 32 of the threaded rubber ring 3 is larger than the diameter of the round hole A2, under normal circumstances, the inner ring 32 of the threaded rubber ring 3 will close the round hole A2. When the air pressure in the piston's sealed space decreases, the water flows upward from the round hole A2, impacting the bottom of the inner ring 32 of the threaded rubber ring 3, causing the inner ring 32 of the threaded rubber ring 3 to tilt upward with the connecting part 33 as the axis, thereby opening the round hole A2 and allowing water to flow into the sleeve cavity of the lower sleeve 1 through the round hole A2.

[0039] like Figure 3 and Figure 4 As shown, the upper one-way valve includes a rubber gasket 6, a piston housing 7, a sealing seat 8, and a plunger valve 9;

[0040] The rubber gasket 6 is wrapped around the outside of the piston housing 7. The inner ring of the rubber gasket 6 is in contact with the piston housing 7 without any gap, and the outer ring of the rubber gasket 6 is in contact with the inner wall of the lower sleeve 1 without any gap.

[0041] The sealing seat 8 is located inside the piston housing 7 and is connected to the piston housing 7 by threads; the bottom of the sealing seat 8 has a water inlet; the top of the sealing seat 8 is equipped with the plunger valve 9; the middle of the piston housing 7 has symmetrical water outlets.

[0042] As a specific implementation, the upper sleeve 2 consists of an upper concave frame and a lower hollow sleeve. The upper concave frame is connected to the connecting rod 10 by screw d14 and serves as the fulcrum of the connecting rod 10. The lower hollow sleeve has a hole at the bottom as a water outlet A1.

[0043] The bottom of the lower sleeve 1 is threaded and connected to the drill rod. At the same time, the bottom of the lower sleeve 1 has a circular grid with a hole, namely the threaded rubber ring 3. The lower one-way valve is connected to the lower sleeve 1 at the grid.

[0044] The upper double lugs of the piston housing 7 pass through screw b12, and the connecting rod 10 passes through screw b12, thereby connecting and fixing the connecting rod 10 and the piston housing 7. Figure 5 The upper end of the connecting rod 10 is hinged to the end of the hand crank 11 by screw c13. The upper sleeve 2 has a concave frame, which is connected to the hand crank 11 by screw d14 and serves as the fulcrum of the hand crank 11.

[0045] Therefore, the hand crank 11 is located outside the upper sleeve 2. The hand crank 11 has two drilled holes, which are connected to the connecting rod 10 and the upper part of the upper sleeve 2 respectively by screws. The upper part of the upper sleeve serves as the fixed fulcrum for the hand crank. When the hand crank 11 is cranked up and down, it drives the connecting rod 10 to move up and down. The connecting rod 10 drives the upper one-way valve to move up and down. The air in the piston's sealed space A3 is compressed and expanded, thereby causing the water in the drill rod to flow out from the water outlet A1 in the upper sleeve 2.

[0046] The following is a specific example:

[0047] The high-pressure water pressure test drill rod water column elimination device includes a fixed sleeve system and a water column pressure elimination system.

[0048] The fixed sleeve system consists of a lower sleeve 1 and an upper sleeve 2. The lower sleeve 1 is located at the bottom of the fixed sleeve system and connected to the drill pipe, while the upper sleeve 2 is located at the top of the fixed sleeve system. The water column pressure relief system consists of a threaded rubber ring 3, a small truncated cone 4, a rubber washer 6, a piston housing 7, a sealing seat 8, a plunger valve 9, a connecting rod 10, a hand crank 11, screws a5, b12, c13, and d14. The threaded rubber ring 3 is located inside the lower sleeve 1, below the sealing seat 8. The small truncated cone 4 is located above the threaded rubber ring 3. Screw a5 connects the small truncated cone 4 to the threaded rubber ring 3. The rubber washer 6 wraps around the outside of the piston housing 7. The sealing seat 8 is located inside the piston housing 7 and is threadedly connected to the inside of the piston housing 7. The plunger valve 9 is located inside the sealing seat 8. The connecting rod 10 is located at the top of the piston housing 7 and is connected by screw b12. The hand crank 11 is connected to the outside of the upper sleeve 2 by screw d14.

[0049] The upper sleeve 2 and the lower sleeve 1 are hollow cylinders, divided into upper and lower sections at the upper limit of the piston housing 7, and connected by threads. The outer diameter of the upper sleeve 2 is the same as that of the lower sleeve 1, and the inner diameter of the upper sleeve 2 is smaller than that of the lower sleeve 1.

[0050] The upper sleeve 2 has a concave frame on its upper part. The upper concave frame is connected to the hand crank 11 by screw d14 and serves as the fulcrum of the hand crank 11. A water outlet A1 is left in the upper sleeve 2 as a pressure-reducing drain outlet.

[0051] The bottom of the lower sleeve 1 has a concentric circular hole A2, the diameter of which is slightly smaller than the diameter of the inner ring 32 of the threaded rubber ring 3.

[0052] The outer ring 31 of the threaded rubber ring 3 is attached to the concentric hole at the bottom of the lower sleeve 1. The inner ring 32 of the threaded rubber ring 3 has a small truncated cone 4 on its upper part. The two are connected together by screw a5 to form a lower one-way valve. When the air pressure in the piston's sealed space decreases, water flows through the lower one-way valve into the sleeve cavity.

[0053] The piston housing 7 has two lugs on the upper part that pass through screw b12, and the connecting rod 10 passes through screw b12. Symmetrical water outlets are cut out in the middle of the piston housing 7.

[0054] The rubber gasket 6 is wrapped around the outside of the piston housing 7. The inner ring of the rubber gasket 6 is in contact with the piston housing 7 without any gap, and the outer ring of the rubber gasket 6 is in contact with the inner wall of the lower sleeve 1 without any gap, forming a piston-sealed space A3 with the lower one-way valve.

[0055] The sealing seat 8 is located inside the piston housing 7 and is connected to the piston housing 7 by threads. There is a plunger valve 9 inside the sealing seat 8. When the air pressure inside the piston sealed space A3 increases, the plunger valve 9 moves upward and water can flow through the outlet of the piston housing 7. When the air pressure inside the piston sealed space A3 decreases, the plunger valve 9 moves downward to form a sealed space.

[0056] The lower end of the connecting rod 10 is connected to the screw b12, and the upper end of the connecting rod 10 is connected to the screw c13.

[0057] The hand crank 11 is connected to the connecting rod 10 via screw c13. The hand crank 11 is connected to the outer concave frame of the upper sleeve 2 via screw d14. The hand crank 11 moves up and down with screw d14 as the fulcrum, which drives the connecting rod 10 to move up and down. The connecting rod 10 drives the upper one-way valve to move up and down. The change in air pressure in the cavity drives the water flow inside the drill rod to achieve pressure relief.

[0058] Therefore, the high-pressure water pressure test drill rod water column elimination device provided by this utility model consists of two parts: a fixed sleeve system and a water column pressure elimination system. The fixed sleeve system consists of an upper sleeve, a lower sleeve, etc., with the upper sleeve located at the top of the fixed sleeve system and the lower sleeve located at the bottom of the fixed sleeve. The water column pressure elimination system consists of a lower one-way valve, an upper one-way valve, a connecting rod, a hand crank, screws, nuts, etc., with the lower one-way valve located at the bottom of the lower sleeve and the upper one-way valve located inside the lower sleeve, with the lower one-way valve at the top and the upper sleeve at the bottom. The connecting rod is located above the upper one-way valve, and the hand crank is located outside the upper sleeve.

[0059] The water column elimination device for high-pressure water pressure test drill rod provided by this utility model is a water column elimination device for high-pressure water pressure test drill rod that is easy to install, quick and convenient, and reusable.

[0060] This utility model also provides a method for using the above-mentioned high-pressure water pressure test drill rod water column elimination device, including the following steps:

[0061] Step 1: Use a drilling rig to lower the high-pressure water pump into the hole. After reaching the predetermined measurement depth, complete the test and connect the device to the top of the drill rod.

[0062] Step 2: Move the hand crank 11 up and down to drive the water column out of the drill rod.

[0063] Step 3: After releasing the water column pressure inside the drill pipe, remove this device and continue extracting the drill pipe.

[0064] The beneficial effects of this utility model are as follows:

[0065] In this utility model, a fulcrum is set at the hand crank, and the lever principle is used to easily and effortlessly enable the upper one-way valve to move inside the cylinder.

[0066] This utility model employs an upper and lower sleeve, with the inner diameter of the upper sleeve being smaller than that of the lower sleeve. This serves to limit the displacement of the upper one-way valve and prevent it from overflowing.

[0067] This utility model has a simple structure, is easy to transport and assemble in confined spaces, has low requirements, and can easily eliminate the water column pressure on the drill rod by hand. Installation can be completed by connecting the drill rod with threads, which reduces production costs and improves production efficiency.

[0068] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A device for eliminating water column in a high-pressure water test drill rod, characterized in that, It includes a fixed sleeve system and a water column pressure relief system; the fixed sleeve system includes an upper sleeve (2) and a lower sleeve (1); the inner cavities of the upper sleeve (2) and the lower sleeve (1) are connected; the side wall of the upper sleeve (2) is provided with a water outlet hole (A1); the bottom of the lower sleeve (1) is provided with a round hole (A2) for connecting with the drill rod; The water column pressure relief system includes a lower one-way valve, an upper one-way valve, a connecting rod (10), and a hand crank (11); the lower one-way valve is disposed above the circular hole (A2) at the bottom of the lower sleeve (1); the upper one-way valve is disposed inside the lower sleeve (1), and the outer periphery of the upper one-way valve is sealed to the inner wall of the lower sleeve (1); the section of the lower sleeve (1) between the upper one-way valve and the lower one-way valve forms a piston-sealed space (A3); the bottom of the connecting rod (10) is fixed to the top of the upper one-way valve, and the top of the connecting rod (10) protrudes from the top of the upper sleeve (2) and is fixed to the bottom of the hand crank (11). Under the action of the hand crank (11), the connecting rod (10) is driven to move up and down, thereby driving the upper one-way valve to move up and down inside the lower sleeve (1).

2. The water column elimination device for high-pressure water pressure test drill rod according to claim 1, characterized in that, The upper sleeve (2) and the lower sleeve (1) are hollow cylinders connected by threads; the outer diameter of the upper sleeve (2) is the same as the outer diameter of the lower sleeve (1); the inner diameter of the upper sleeve (2) is smaller than the inner diameter of the lower sleeve (1).

3. The water column elimination device for high-pressure water pressure test drill rod according to claim 1, characterized in that, The lower one-way valve includes a threaded rubber ring (3), a small frustum (4), and a screw a (5); The threaded rubber ring (3) includes an outer ring (31) and an inner ring (32); the outer ring (31) is attached above the circular hole (A2) at the bottom of the lower sleeve (1); the inner ring (32) is set inside the outer ring (31) through a connecting part (33); the inner ring (32) is threadedly connected to the small truncated cone (4) by the screw a (5).

4. The water column elimination device for high-pressure water pressure test drill rod according to claim 3, characterized in that, The diameter of the circular hole (A2) is smaller than the diameter of the inner ring (32) of the threaded rubber ring (3).

5. The water column elimination device for high-pressure water pressure test drill rod according to claim 1, characterized in that, The upper one-way valve includes a rubber gasket (6), a piston housing (7), a sealing seat (8), and a plunger valve (9); The rubber gasket (6) is wrapped around the outside of the piston housing (7). The inner ring of the rubber gasket (6) is in contact with the piston housing (7) without any gap, and the outer ring of the rubber gasket (6) is in contact with the inner wall of the lower sleeve (1) without any gap. The sealing seat (8) is located inside the piston housing (7) and is connected to the piston housing (7) by threads; the bottom of the sealing seat (8) has a water inlet; the top of the sealing seat (8) is equipped with the plunger valve (9); the middle part of the piston housing (7) has symmetrical water outlets.

6. The water column elimination device for high-pressure water pressure test drill rod according to claim 5, characterized in that, The upper double lugs of the piston housing (7) pass through screw b (12), and the connecting rod (10) passes through the screw b (12), thereby achieving the connection and fixation of the connecting rod (10) and the piston housing (7).

7. The water column elimination device for high-pressure water pressure test drill rod according to claim 1, characterized in that, The upper end of the connecting rod (10) is hinged to the end of the hand crank (11) by screw c (13).

8. The water column elimination device for high-pressure water pressure test drill rod according to claim 1, characterized in that, The upper sleeve (2) has a concave frame on its upper part. The concave frame is connected to the hand crank (11) by screw d (14) and serves as the fulcrum of the hand crank (11).

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