Drill hole water injection test testing device based on top pressure type plug

Abstract

The utility model relates to the technical field of well drilling testing, in particular to a drill hole water injection test testing device based on a top pressure type plug, which comprises a test drill hole, a drill rod, the top pressure type plug, a water injection sleeve and a booster pump station. A drill rod is arranged in the measuring drill hole; threaded rods are arranged at the lower parts of the drill rods; a top pressure type plug is arranged on the drill rod in a sleeving manner; the bottom of the drill rod is connected with a water injection sleeve; a water injection pipe is arranged in the drill rod; one end of the water injection pipe is connected with the booster pump; the drilling water injection test device solves the problem that the operation technology of a drilling water injection test is tedious.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling testing, in particular to a drilling water injection test device based on a top pressure plug. Background Art

[0002] The borehole water injection test is an in-situ test method that injects water into the test section through a borehole to determine the permeability coefficient of the rock and soil layer. It can be divided into a borehole constant water head injection test and a borehole reduced water head injection test.

[0003] The utility model patent with application number 201620457772.2 discloses a "drilling water injection test device for measuring the permeability of rock and soil", which includes a borehole, a casing, a working pipe, a water stop ring and a bottom cushion. Since the casing needs to be lowered and the water stop of the pipe foot is difficult, the on-site workload is increased, the casing is time-consuming and labor-intensive, and the test cost is high. Utility Model Content

[0004] The utility model aims to provide a drilling water injection test device based on a top pressure plug to solve the problem of complicated operation technology of drilling water injection test.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A drilling water injection test device based on a top pressure plug comprises a test borehole, a drill rod, a top pressure plug, a water injection casing and a pressure pump station; a drill rod is arranged in the test borehole; a threaded rod is arranged at the lower part of the drill rod; a top pressure plug is sleeved on the drill rod; a water injection casing is connected to the bottom of the drill rod; a water injection pipe is arranged inside the drill rod; one end of the water injection pipe is connected to the pressure pump station; and the other end of the water injection pipe is connected to the water injection casing.

[0007] Furthermore, a watertight rubber ring is arranged on the top-pressure embolism plug; the watertight rubber rings are arranged in an array on the top-pressure embolism plug; rubber ring spacers are arranged between the watertight rubber rings; and a pressure plate is arranged at the bottom of the watertight rubber rings.

[0008] Furthermore, a drill pipe sleeve is provided inside the top pressure plug; a driving tooth A is provided inside the drill pipe sleeve; the other end of the driving tooth A is meshed with the driving tooth B; and a rotating rod is connected to the top of the driving tooth B.

[0009] Furthermore, water injection holes are arranged on the outer wall of the water injection casing; the water injection holes are vertically arranged on the outer surface of the water injection casing; a casing sealing cover is arranged on the top of the water injection casing; a nut is arranged at the bottom of the casing sealing cover; the drill rod is inserted into the casing sealing cover and connected to the nut.

[0010] Furthermore, a one-way chuck is provided on one side of the driving tooth B; a one-way clamping tooth is provided inside the one-way chuck; the one-way clamping tooth is provided on the clamping tooth rotating shaft; and a spring is provided inside the clamping tooth rotating shaft.

[0011] Furthermore, a threaded sleeve is provided at the bottom of the water injection sleeve; a support rod is provided on the threaded sleeve.

[0012] Compared with the prior art, the utility model can achieve one of the following beneficial effects:

[0013] 1. A drill rod is arranged in the test borehole; a threaded rod is arranged at the lower part of the drill rod; a top pressure plug is inserted into the drill rod; a water injection casing is connected to the bottom of the drill rod; a water injection pipe is arranged inside the drill rod; one end of the water injection pipe is connected to the pressure pump station; the other end of the water injection pipe is connected to the water injection casing, so that the drill rod can provide support for the top pressure plug and the water injection casing. In actual use, the drill rod is placed in the borehole to be tested, and the top pressure plug is moved downward by operating the top pressure plug to squeeze the top of the water injection casing so that the multi-stage watertight rubber ring arranged on the top pressure plug expands and seals with the inner wall of the well, and then the water injection pipe is connected through the pressure pump station and high-pressure test water is introduced into the water injection casing to quickly complete the water injection test of the well.

[0014] 2. The top pressure plug is provided with a watertight rubber ring; the watertight rubber rings are arranged in an array on the top pressure plug; rubber ring partitions are provided between the watertight rubber rings; a pressure plate is provided at the bottom of the watertight rubber ring, which can enable the pressure plug to move downward and squeeze the water injection casing to expand the watertight rubber ring, thereby achieving the purpose of sealing in the borehole.

[0015] 3. A drill pipe sleeve is provided inside the top pressure type plug; a driving tooth A is provided inside the drill pipe sleeve; the other end of the driving tooth A is meshed with the driving tooth B; a rotating rod is connected to the top of the driving tooth B, so that the top pressure type plug can be conveniently inserted through the drill pipe sleeve, and the top pressure type plug can be moved downward by rotating the operating rotating rod to squeeze the water injection casing to expand the watertight rubber ring, thereby achieving the purpose of sealing in the borehole.

[0016] 4. Water injection holes are arranged on the outer wall of the water injection casing; the water injection holes are vertically arranged on the outer surface of the water injection casing; a casing sealing cover is arranged on the top of the water injection casing; a nut is arranged on the bottom of the casing sealing cover; the drill rod is inserted into the casing sealing cover and connected to the nut, so that test water can be injected into the drill hole through the arranged water injection holes, thereby increasing the water injection speed and the water injection pressure.

[0017] 5. A one-way chuck is provided on one side of the driving tooth B; a one-way clamping tooth is provided inside the one-way chuck; the one-way clamping tooth is provided on the clamping tooth rotating shaft; a spring is provided inside the clamping tooth rotating shaft, so that the one-way chuck can realize the one-way movement of the top pressure type plug, thereby preventing the top pressure type plug from moving in the opposite direction during the injection test, thereby affecting the sealing performance.

[0018] 6. A threaded sleeve is provided at the bottom of the water injection casing; a support rod is provided on the threaded sleeve, which can be used to limit the position of the support rod and the bottom of the well to prevent the drill rod from sliding and affecting the water injection test. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model.

[0020] Figure 2 This is a schematic diagram of the top pressure embolism structure of the utility model.

[0021] Figure 3 This is a schematic diagram of the drive gear structure of the utility model. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0023] Example 1

[0024] A drilling water injection test device based on a top pressure plug comprises a test borehole 1, a drill rod 2, a top pressure plug 3, a water injection casing 4 and a pressure pump station 6; the test borehole 1 is provided with a drill rod 2; a threaded rod 201 is provided at the lower part of the drill rod 2; a top pressure plug 3 is inserted into the drill rod 2; a water injection casing 4 is connected to the bottom of the drill rod 2; a water injection pipe 601 is provided inside the drill rod 2; one end of the water injection pipe 601 is connected to the pressure pump station 6; the other end of the water injection pipe 601 is connected to the water injection casing 4; the injection A pressure regulating valve 602 is provided on the water pipe 601, which can provide support for the top pressure plug and the water injection casing through the set drill pipe. In actual use, the drill pipe is placed in the borehole to be tested, and the top pressure plug is moved downward by operating the top pressure plug to squeeze the top of the water injection casing so that the multi-stage watertight rubber ring provided on the top pressure plug expands and seals with the inner wall of the well. Then, the water injection pipe is connected through the pressure pump station and high-pressure test water is introduced into the water injection casing to quickly complete the water injection test of the well.

[0025] Example 2

[0026] On the basis of Example 1, a watertight rubber ring 301 is arranged on the top pressure type embolism 3; the watertight rubber rings 301 are arranged in an array on the top pressure type embolism 3; a rubber ring partition 302 is arranged between the watertight rubber rings 301; a pressure plate 303 is arranged at the bottom of the watertight rubber ring 301, which can realize the downward movement of the pressure type embolism and the squeezing of the water injection casing to expand the watertight rubber ring, thereby achieving the purpose of sealing in the borehole.

[0027] Example 3

[0028] On the basis of Example 1, the top pressure type embolizer 3 is provided with a drill pipe sleeve 304 inside; a driving tooth A305 is provided inside the drill pipe sleeve 304; the other end of the driving tooth A305 is meshed with the driving tooth B306; a rotating rod 307 is connected to the top of the driving tooth B306, so that the drill pipe sleeve can be conveniently inserted into the top pressure type embolizer, and the top pressure type embolizer can be rotated by the operating rotating rod to move downward and squeeze the water injection casing to expand the watertight rubber ring, thereby achieving the purpose of sealing in the borehole.

[0029] Example 4

[0030] On the basis of Example 1, water injection holes 401 are arranged on the outer wall of the water injection casing 4; the water injection holes 401 are vertically arranged on the outer surface of the water injection casing 4; a casing sealing cover 402 is arranged on the top of the water injection casing 4; a nut 403 is arranged on the bottom of the casing sealing cover 402; the drill rod 2 is inserted into the casing sealing cover 402 and connected to the nut 403, so that test water can be injected into the borehole through the arranged water injection holes, thereby increasing the water injection speed and increasing the water injection pressure.

[0031] Example 5

[0032] On the basis of Example 1, a one-way chuck 308 is provided on one side of the driving tooth B306; a one-way latch tooth 310 is provided inside the one-way chuck 308; the one-way latch tooth 310 is provided on the latch tooth shaft 309; a spring 311 is provided inside the latch tooth shaft 309, so that the one-way chuck can realize the one-way movement of the top pressure type plug, thereby preventing the top pressure type plug from moving in the opposite direction during the injection test and affecting the sealing performance.

[0033] Example 6

[0034] On the basis of Example 1, a threaded sleeve 404 is provided at the bottom of the water injection casing 4; a support rod 5 is provided on the threaded sleeve 404, which can be used to limit the position of the support rod with the bottom of the well to prevent the drill pipe from sliding and affecting the water injection test.

[0035] Although the utility model is described herein with reference to a plurality of illustrative embodiments of the utility model, it should be understood that those skilled in the art may devise many other modifications and implementations that fall within the scope and spirit of the principles disclosed herein. More specifically, within the scope of the disclosure, drawings, and claims of the present application, various modifications and improvements may be made to the components and / or layout of the subject combination layout. In addition to the modifications and improvements made to the components and / or layout, other uses will also be apparent to those skilled in the art.

Claims

1. A drilling water injection test device based on a top pressure plug, characterized in that: The invention comprises a drilling hole (1), a drill rod (2), a top pressure plug (3), a water injection casing (4) and a pressure pump station (6); a drilling hole (1) is provided with a drill rod (2); a threaded rod (201) is provided at the lower part of the drill rod (2); a top pressure plug (3) is sleeved on the drill rod (2); and a water injection casing (4) is connected to the bottom of the drill rod (2); A water injection pipe (601) is arranged inside the drill pipe (2); one end of the water injection pipe (601) is connected to the pressure pump station (6); the other end of the water injection pipe (601) is connected to the water injection casing (4); and a pressure regulating valve (602) is arranged on the water injection pipe (601).

2. A drilling water injection test device based on top pressure plug according to claim 1, characterized in that: The top-pressure plug (3) is provided with a watertight rubber ring (301); the watertight rubber rings (301) are arranged on the top-pressure plug (3); a rubber ring spacer (302) is provided between the watertight rubber rings (301); and a pressure plate (303) is provided at the bottom of the watertight rubber ring (301).

3. The drilling water injection test device based on top pressure plug according to claim 1 is characterized in that: The top pressure plug (3) is provided with a drill rod sleeve (304) inside; a driving tooth A (305) is provided inside the drill rod sleeve (304); the other end of the driving tooth A (305) is meshed with the driving tooth B (306); A rotating rod (307) is connected to the top of the driving tooth B (306).

4. The drilling water injection test device based on top pressure plug according to claim 1 is characterized in that: The water injection casing (4) is provided with water injection holes (401) on its outer wall; the water injection holes (401) are arranged vertically on the outer surface of the water injection casing (4); a casing sealing cover (402) is provided on the top of the water injection casing (4); a nut (403) is provided on the bottom of the casing sealing cover (402); the drill rod (2) is inserted into the casing sealing cover (402) and connected to the nut (403).

5. The drilling water injection test device based on top pressure plug according to claim 3 is characterized in that: A one-way chuck (308) is provided on one side of the driving tooth B (306); a one-way clamping tooth (310) is provided inside the one-way chuck (308); and the one-way clamping tooth (310) is provided on the clamping tooth rotating shaft (309); A spring (311) is arranged inside the latching gear rotating shaft (309).

6. The drilling water injection test device based on top pressure plug according to claim 1 is characterized in that: A threaded sleeve (404) is provided at the bottom of the water injection sleeve (4); a support rod (5) is provided on the threaded sleeve (404).

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