Drilling water injection test testing device based on water pressure type plug

Abstract

The utility model relates to a drill hole water injection test testing device based on a water pressure type plug. The testing device comprises water supply equipment, an electromagnetic flowmeter, a water injection pipe and the water pressure type water stop plug which are sequentially connected in series. The water injection pipe is used for supplying water of water supply equipment to the water pressure type water stop plug through the electromagnetic flowmeter; the water pressure type water stop plug comprises a first center rod, a second center rod, a water stop plug capsule, an upper end iron head and a lower end iron head. And the like. The device has the beneficial effects that the first center rod is in sliding fit with the water pressure type water stop plug, water stop and water injection tests can be completed by adopting one set of device, a working sleeve does not need to be put down, the test efficiency is improved, and the test cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of drilling water injection test device structure, in particular to the technical field of drilling water injection test device based on hydraulic embolism. 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. Summary of the invention

[0004] The utility model is designed to solve the above problems and defects and provides a drilling water injection test device based on a hydraulic embolism.

[0005] The utility model is implemented by the following technical solution.

[0006] A test device for drilling water injection test based on hydraulic embolism, the test device of the utility model comprises a water injection pipe 2, a hydraulic water stop embolism 3, a water supply device 4, and an electromagnetic flowmeter 5; the water supply device 4, the electromagnetic flowmeter 5, the water injection pipe 2, and the hydraulic water stop embolism 3 are connected in series in sequence; the water injection pipe 2 is used to supply water from the water supply device 4 to the hydraulic water stop embolism 3 through the electromagnetic flowmeter 5; the hydraulic water stop embolism 3 comprises a first center rod 31, a second center rod 32, a water stop embolism capsule 33, an upper end iron head 34A and a lower end iron head 34B; the upper end of the first center rod 31 is open, the lower end is closed by a plug 313, and a plurality of water holes 311 are arranged on the lower side wall; the second center rod 32 is sleeved on the outer side of the first center rod 31; the water stop embolism capsule 33 is sleeved on the outer side of the second center rod 32;

[0007] The upper end iron head 34A is sleeved on the outer side of the second center rod 32, and the upper end iron head 34A is fixedly set on the upper part of the water-stopping embolic capsule 33; the lower end iron head 34B is sleeved on the outer side of the second center rod 32, and the lower end iron head 34B is fixedly set on the lower part of the water-stopping embolic capsule 33; the lower end iron head 34B and the water-stopping embolic capsule 33 are provided with a connecting hole.

[0008] Furthermore, the testing device of the utility model comprises a reducer 6 ; the reducer 6 is arranged between the water injection pipe 2 and the hydraulic water-stop plug 3 ; that is, the water injection pipe 2 is connected to the hydraulic water-stop plug 3 via the reducer 6 .

[0009] Furthermore, the connecting hole described in the utility model is: an annular groove 341 is set on the inner wall of the lower end iron head 34B; O-rings 342 are fixedly set at the upper and lower edges of the annular groove 341; and the O-ring 342 is sealed and fitted with the first center rod 31.

[0010] Furthermore, in the utility model, a positioning pin 312 is fixedly arranged at the lower part of the first center rod 31; the first center rod 31 is slidably connected with the second center rod 32 and the lower end iron head 34B; when the lower end iron head 34B abuts against the positioning pin 312, the water injection pipe 2, the first center rod 31, the water hole 311, the lower end annular groove 341, and the water-stopping embolic capsule 33 form an integrated passage.

[0011] Furthermore, when the first center rod 31 of the utility model is slidably connected with the second center rod 32 and the lower end iron head 34B, the displacement distance of the first center rod 31 sliding up and down satisfies the switching of its water hole 311 inside and outside the lower end iron head 34B.

[0012] Furthermore, the outer diameter of the hydraulic water stop plug 3 of the utility model is smaller than the inner diameter of the borehole 1 in the borehole water injection test; after the hydraulic water stop plug 3 is pressurized, the water stop plug capsule 33 expands and adheres to the inner wall of the borehole 1. The borehole 1 includes a test section and a non-test section.

[0013] Furthermore, the water injection pipe 2 of the utility model is a drill rod or a hose.

[0014] Furthermore, the water injection pipe 2 of the utility model is higher than the orifice of the borehole 1 .

[0015] The beneficial effect of the utility model is that the first center rod and the hydraulic water-pressure type water-stop plug are slidably matched, so that water can be injected into the water hole to expand the water-stop plug to seal the test section. When the water hole follows the axial downward movement of the first center rod to be exposed in the test section, water is injected through the water hole to carry out a water injection test. After the water injection test is completed, the water supply equipment is turned off to release the water pressure in the test section, and then the first center rod is pulled upward to slide the water hole into the expansion water-stop plug, so that the water pressure in the expansion water-stop plug flows back through the water hole to release the pressure. The water stopping and water injection tests can be completed with one set of equipment without the need to lower the working casing, thereby improving the test efficiency and reducing the test cost.

[0016] The utility model is further explained below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 The utility model is a schematic diagram of the structure of the hydraulic water-stop plug.

[0019] The numbers in the figure are: 1-drill hole, 2-water injection pipe, 3-hydraulic water stop plug, 4-water supply equipment, 5-electromagnetic flowmeter, 6-reducing joint, 31-first center rod, 32-second center rod, 33-water stop plug capsule, 34A-upper end iron head, 34B-lower end iron head, 311-water hole, 312-locating pin, 313-plug, 341-annular groove, 342-O-ring. DETAILED DESCRIPTION

[0020] The following embodiments are only a part of the technical solution of the present utility model, and are not intended to limit the entire technical solution of the present utility model. The embodiments of the present utility model are provided to further explain and illustrate the details of the technical solution of the present utility model.

[0021] See Figure 1 , Figure 2 shown.

[0022] A test device for drilling water injection test based on hydraulic embolism, the test device of the utility model comprises a water injection pipe 2, a hydraulic water stop embolism 3, a water supply device 4, and an electromagnetic flowmeter 5; the water supply device 4, the electromagnetic flowmeter 5, the water injection pipe 2, and the hydraulic water stop embolism 3 are connected in series in sequence; the water injection pipe 2 is used to supply water from the water supply device 4 to the hydraulic water stop embolism 3 through the electromagnetic flowmeter 5; the hydraulic water stop embolism 3 comprises a first center rod 31, a second center rod 32, a water stop embolism capsule 33, an upper end iron head 34A and a lower end iron head 34B; the upper end of the first center rod 31 is open, the lower end is closed by a plug 313, and a plurality of water holes 311 are arranged on the lower side wall; the second center rod 32 is sleeved on the outer side of the first center rod 31; the water stop embolism capsule 33 is sleeved on the outer side of the second center rod 32; the upper end iron head 34A is sleeved on the outer side of the second center rod 32, and the upper end iron head 34B A is fixedly arranged on the upper part of the water-stopping embolic capsule 33; the lower end iron head 34B is sleeved on the outer side of the second center rod 32, and the lower end iron head 34B is fixedly arranged on the lower part of the water-stopping embolic capsule 33; the lower end iron head 34B and the water-stopping embolic capsule 33 are provided with a connecting hole.

[0023] Furthermore, the testing device of the utility model comprises a reducer 6 ; the reducer 6 is arranged between the water injection pipe 2 and the hydraulic water-stop plug 3 ; that is, the water injection pipe 2 is connected to the hydraulic water-stop plug 3 via the reducer 6 .

[0024] Furthermore, the connecting hole described in the utility model is: an annular groove 341 is set on the inner wall of the lower end iron head 34B; O-rings 342 are fixedly set at the upper and lower edges of the annular groove 341; and the O-ring 342 is sealed and fitted with the first center rod 31.

[0025] Furthermore, in the utility model, a positioning pin 312 is fixedly arranged at the lower part of the first center rod 31; the first center rod 31 is slidably connected with the second center rod 32 and the lower end iron head 34B; when the lower end iron head 34B abuts against the positioning pin 312, the water injection pipe 2, the first center rod 31, the water hole 311, the lower end annular groove 341, and the water-stopping embolic capsule 33 form an integrated passage.

[0026] Furthermore, when the first center rod 31 of the utility model is slidably connected with the second center rod 32 and the lower end iron head 34B, the displacement distance of the first center rod 31 sliding up and down satisfies the switching of its water hole 311 inside and outside the lower end iron head 34B.

[0027] Furthermore, the outer diameter of the hydraulic water stop plug 3 of the utility model is smaller than the inner diameter of the borehole 1 in the borehole water injection test; after the hydraulic water stop plug 3 is pressurized, the water stop plug capsule 33 expands and adheres to the inner wall of the borehole 1. The borehole 1 includes a test section and a non-test section.

[0028] Furthermore, the water injection pipe 2 of the utility model is a drill rod or a hose.

[0029] Furthermore, the water injection pipe 2 of the utility model is higher than the orifice of the borehole 1 .

[0030] The specific implementation steps of this utility model are as follows:

[0031] Step 1: The first center rod 31 and the hydraulic water-stop plug 3 are slidably matched. Under the action of their own weight, the hydraulic water-stop plug 3 and the first center rod 31 descend together and are tightly attached to the positioning pin 312; at this time, the water injection pipe 2, the center rod, the water hole 311, the annular groove 341 in the lower end iron head 34B, and the water-stop plug capsule 33 form a loop, so that the water hole 311 can be filled with water to expand the water-stop plug 3 to seal the test section.

[0032] Step 2: When the hydraulic water-stop plug 3 is close to the hole wall, press down the water injection pipe 2 so that the water hole 311 moves downward along with the first center rod 31 and is exposed in the test section, and water is injected through the water hole 311 to perform a water injection test according to the regulations.

[0033] Step 3: After the water injection test is completed, turn off the water supply equipment 4, lift the water injection pipe 2 and pull the first center rod 31 upwards to make the positioning pin 312 close to the hydraulic water-stop plug 3. At this time, the water pressure in the expansion water-stop plug is returned through the water hole to release the pressure, and the water injection test is completed when it is lifted out of the hole.

[0034] The above is only a specific embodiment of the utility model, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A drilling water injection test device based on a hydraulic plug, characterized in that: The testing device comprises a water injection pipe (2), a hydraulic water stop plug (3), a water supply device (4), An electromagnetic flowmeter (5); the water supply equipment (4), the electromagnetic flowmeter (5), the water injection pipe (2), and the hydraulic water stop plug (3) are connected in series in sequence; the water injection pipe (2) is used to supply water from the water supply equipment (4) to the hydraulic water stop plug (3) through the electromagnetic flowmeter (5); The hydraulic water-stopping plug (3) comprises a first central rod (31), a second central rod (32), a water-stopping plug capsule (33), an upper end iron head (34A) and a lower end iron head (34B); The upper end of the first central rod (31) is open, and the lower end is closed by a plug (313), and a plurality of water holes (311) are arranged on the lower side wall; The second central rod (32) is sleeved on the outside of the first central rod (31); The water-stopping embolism capsule (33) is sleeved on the outside of the second central rod (32); The upper end iron head (34A) is sleeved on the outside of the second center rod (32), and the upper end iron head (34A) is fixedly arranged on the upper part of the water-stopping embolism capsule (33); The lower end iron head (34B) is sleeved on the outside of the second center rod (32), and the lower end iron head (34B) is fixedly arranged at the bottom of the water-stopping embolism capsule (33); The lower end iron head (34B) and the water-stopping embolic capsule (33) are provided with a communicating hole.

2. A drilling water injection test device based on a hydraulic plug according to claim 1, characterized in that: The testing device comprises a reducer (6); the reducer (6) is arranged between the water injection pipe (2) and the hydraulic water stop plug (3); that is, the water injection pipe (2) is connected to the hydraulic water stop plug (3) via the reducer (6).

3. A drilling water injection test device based on a hydraulic plug according to claim 1, characterized in that: The communicating hole is: an annular groove (341) provided on the inner wall of the lower end iron head (34B); O-type sealing rings (342) are fixedly provided at the upper and lower edges of the annular groove (341); and the O-type sealing ring (342) is sealingly fitted with the first center rod (31).

4. A drilling water injection test device based on a hydraulic plug according to claim 1, characterized in that: A positioning pin (312) is fixedly provided at the lower portion of the first center rod (31); the first center rod (31) is slidably connected to the second center rod (32) and the lower end iron head (34B); when the lower end iron head (34B) abuts against the positioning pin (312), the water injection pipe (2), the first center rod (31), the water through hole (311), the annular groove (341), and the water stop plug capsule (33) form an integrated passage.

5. A drilling water injection test device based on a hydraulic plug according to claim 4, characterized in that: When the first center rod (31) is slidably connected to the second center rod (32) and the lower end iron head (34B), the displacement distance of the first center rod (31) sliding up and down satisfies the switching of the water hole (311) thereof inside and outside the lower end iron head (34B).

6. A drilling water injection test device based on a hydraulic plug according to claim 1, characterized in that: The outer diameter of the hydraulic water-stop plug (3) is smaller than the inner diameter of the borehole (1) in the borehole water injection test; after the hydraulic water-stop plug (3) is pressurized, the water-stop plug capsule (33) expands and adheres closely to the inner wall of the borehole (1).

7. A drilling water injection test device based on a hydraulic plug according to claim 1, characterized in that: The water injection pipe (2) is a drill rod or a hose.

8. The drilling water injection test device based on hydraulic plug according to claim 1, characterized in that: The water injection pipe (2) is higher than the orifice of the borehole (1).

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