Portable in-hole extendable pipe bag water injection test device and method

Abstract

The invention provides a portable in-hole extendable pipe bag water injection test device and method. The device comprises a balancing weight, a plug, a middle through pipe, a capsule protection table, a lower inflation capsule, a floral pipe, an inflation pipe, an upper inflation capsule, a sealing connector, a pipe bag, an air pump and a water level gauge. The balancing weight, the plug, the capsule protection table and the lower inflation capsule are sequentially connected in series and installed on the lower portion of the middle through pipe, the floral pipe is located in the middle of the middle through pipe, and the upper portion of the middle through pipe is sleeved with the upper inflation capsule. The lower portion of the inflation pipe is installed beside the middle through pipe and sequentially penetrates through the capsule protection table, the lower inflation capsule and the upper inflation capsule from bottom to top, and an inflation hole is formed in the portion, in the capsule, of the inflation pipe. The requirement for segmented water injection test in rock drilling under the condition that no drilling machine is matched can be met, and the deep hole water injection test is more convenient and feasible.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of rock drilling water injection test, in particular to a portable in-hole extendable pipe bag water injection test device and method. BACKGROUND

[0002] At present, in the rock drilling, the rock mass permeability is generally tested by water pressure test, and the drilling machine is usually needed to cooperate in the test process, the water pressure plug is put into the drilling hole by the drilling machine for water pressure test, and many devices are needed in the test process, and the cost is high. For the completed drilling hole, it is difficult to carry out water injection test and water injection test in sections after the drilling machine leaves. In order to simply test the permeability of the target aquifer at a specific depth in the drilling hole and obtain the evolution characteristics of the permeability, a portable in-hole extendable pipe bag water injection test device and method are provided. SUMMARY

[0003] In order to complete the water injection test in the rock drilling hole without the cooperation of the drilling machine, the present application provides a portable in-hole extendable pipe bag water injection test device and method, and the method needs simple and light equipment and instruments, and can simply carry out water injection test for the target aquifer in the drilling hole.

[0004] The technical scheme adopted by the present application to solve the technical problem is:

[0005] A portable in-hole extendable pipe bag water injection test device, comprising a counterweight, a plug, a middle pipe, a capsule protection platform, a lower inflatable capsule, a flower pipe, an inflation pipe, an upper inflatable capsule, a sealing joint, a pipe bag, an air pump and a water level gauge; the counterweight, the plug, the capsule protection platform and the lower inflatable capsule are sequentially connected and installed at the lower part of the middle pipe, the flower pipe is located at the middle position of the middle pipe, and the upper inflatable capsule is sleeved on the upper part of the middle pipe; the lower part of the inflation pipe is installed beside the middle pipe, sequentially passes through the capsule protection platform, the lower inflatable capsule and the upper inflatable capsule from bottom to top, and the part of the inflation pipe in the capsule is provided with an inflation hole.

[0006] Further, the inflation pipe is a wear-resistant and tensile hose, and the part installed beside the middle pipe is a steel pipe; the inflation pipe is connected with the air pump and the inflatable capsule, and is used for inflating the inflatable capsule.

[0007] Further, the upper inflatable capsule and the lower inflatable capsule can tightly adhere to the hole wall after being inflated and expanded by the inflation pipe, so that the target aquifer and the pipe bag form a closed environment; the upper inflatable capsule and the lower inflatable capsule are thickened and wear-resistant treated.

[0008] Further, the bottom pipe opening of the middle pipe is sealed with the plug.

[0009] Further, the pipe bag is a steel wire hose, both ends of which are provided with sealing joints to facilitate connection of extension, in addition, the steel wire hose ensures its lightness and easy carrying and transportation, and is beneficial to development of the test without cooperation of a drilling machine; the steel wire in the pipe bag is used for avoiding large deformation while increasing strength.

[0010] Further, the water level meter is placed in the pipe bag; after water injection into the pipe bag starts the test, the water level meter is used for recording a water level drop process in the pipe bag, and the aquifer permeability coefficient is calculated according to the water level drop process in the pipe bag.

[0011] A portable in-hole extendable pipe bag water injection test method is adopted, and the method comprises the following steps:

[0012] 1) Assembling the test device: sequentially connecting the weight block, the plug, the capsule protection platform, the lower inflatable capsule in the lower part of the central pipe, setting the flower pipe at the middle position of the central pipe, and sleeving the upper inflatable capsule on the upper part of the central pipe; sequentially passing the capsule protection platform, the lower inflatable capsule and the upper inflatable capsule from bottom to top, and ensuring that the part of the inflation pipe in the capsule is provided with an inflation hole;

[0013] 2) Connecting the pipe bag and placing the water level meter: connecting one end of the pipe bag to the central pipe through the sealing joint, extending the other end to the drilling hole, and then placing the water level meter in the pipe bag;

[0014] 3) Lowering the device to the target position: lowering the assembled device to the target aquifer corresponding position in the hole;

[0015] 4) Inflating and sealing: connecting the air pump through the inflation pipe to inflate the upper inflatable capsule and the lower inflatable capsule, so that the upper inflatable capsule and the lower inflatable capsule are inflated and tightly adhere to the drilling hole wall, and a closed environment is formed in the aquifer and the pipe bag;

[0016] 5) Water injection test and data recording: injecting water into the pipe bag to start the water injection test, recording the water level change process in the pipe bag through the water level meter, and calculating the aquifer permeability parameter.

[0017] Further, the installation of the inflation pipe in step 1) comprises: using a wear-resistant and tensile hose as the inflation pipe, and installing the lower part of the inflation pipe beside the central pipe, and the part is provided as a steel pipe; one end of the inflation pipe is connected to the air pump, and the other end is communicated with the upper inflatable capsule and the lower inflatable capsule, so as to inflate the inflatable capsules through the inflation pipe.

[0018] Further, the inflation and sealing in step 4) comprises: inflating the upper inflatable capsule and the lower inflatable capsule through the inflation pipe, so that the capsules are inflated and tightly adhere to the hole wall, and a closed environment between the target aquifer and the pipe bag is formed; the upper inflatable capsule and the lower inflatable capsule are thickened and wear-resistant treated before use.

[0019] Further, the water injection test and data recording in step 5) include: stopping water injection after water injection to a preset water level in the tube bag, recording water level in the tube bag with time through a water level gauge in real time, calculating the aquifer permeation parameter through a variable water head permeation coefficient calculation formula according to the water conservancy and hydropower engineering water injection test regulation:

[0020] ;

[0021] Wherein K is the aquifer permeation parameter, is a time interval, H0, H1, H2 are water head values at time t0, t1, t2 respectively, r is the tube bag radius, r e is the borehole radius, and l is the flower tube segment length between the upper inflatable capsule and the lower inflatable capsule.

[0022] The application has the following beneficial effects:

[0023] The inflatable capsule of the application is tightly attached to the hole wall after being inflated by air delivered by an air pump, so as to achieve the purpose of isolating hydraulic connection, form hydraulic connection between the target aquifer and the tube bag, isolate hydraulic connection between the target aquifer and other aquifers, carry out water injection test in the target aquifer, and finally achieve the purpose of obtaining aquifer permeation parameters in layers, so that the water injection test in a deep hole can be carried out simply and conveniently; in addition, during the process of carrying out the borehole water injection test by using the application, the required setting is simple, the tube bag is light in use, and the working efficiency can be greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a structural schematic diagram of a portable in-hole extendable tube bag water injection test device of the application;

[0025] Figure 2 is an application schematic diagram of the application;

[0026] Figure 3 is a water level gauge data recording schematic diagram of the application.

[0027] In the figure: 1 - weight block, 2 - plug, 3 - middle pipe, 4 - capsule protection platform, 5 - lower inflatable capsule, 6 - flower tube, 7 - inflatable tube, 8 - upper inflatable capsule, 9 - sealing joint, 10 - tube bag, 11 - air pump, 12 - water level gauge;

[0028] Figure 3 In the figure: t0, t1, t2 are time, H0, H1, H2 are water head values, r is the tube bag radius, r e is the borehole radius, and l is the flower tube segment length between the two inflatable capsules. DETAILED DESCRIPTION

[0029] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0030] As shown in Figure 1 The present application provides a portable in-hole extendable pipe bag water injection test device, which comprises a water level gauge 12, an air pump 11, a pipe bag 10, a sealing joint 9, an upper inflatable capsule 8, an inflation pipe 7, a flower pipe 6, a lower inflatable capsule 5, a gel protection platform 4, a middle pipe 3, a plug 2 and a counterweight 1.

[0031] The counterweight 1, the plug 2, the gel protection platform 4 and the lower inflatable capsule 5 are sequentially and continuously installed at the lower part of the middle pipe 3, the flower pipe 6 is located at the middle part of the middle pipe 3, the upper inflatable capsule 8 is sleeved on the upper part of the middle pipe 3, and the inflation pipe 7 is installed beside the middle pipe 3 and sequentially passes through the gel protection platform 4, the lower inflatable capsule 5 and the upper inflatable capsule 8 from bottom to top, and the inflation pipe 7 is provided with an inflation hole in the inflatable capsule.

[0032] The bottom pipe opening of the middle pipe 3 is sealed by the plug 2, the top is connected with the pipe bag 10 by the sealing joint 9, and the upper and lower inflatable capsules are located at the two ends of the middle pipe 3, and the flower pipe 6 is located at the middle position of the middle pipe 3.

[0033] As shown in Figure 2 In the working process of the present application, after a test drilling hole is selected, the depth of the tested aquifer in the drilling hole is determined first, then the middle pipe is placed in the drilling hole, so that the flower pipe section is located at the target test section, the upper and lower inflatable capsules are located at the two ends of the test section, then the upper and lower inflatable capsules are inflated through the inflation pipe 7, so that the inflatable capsules are inflated and tightly adhere to the drilling hole wall, thereby isolating the target aquifer from the hydraulic connection of the drilling hole, forming a hydraulic passage in the target aquifer, the middle pipe and the pipe bag, and finally water is injected into the pipe bag to start the water injection test, the water level drop process in the pipe bag is recorded by the water level gauge, and the test is completed, and the aquifer permeability coefficient is calculated by a formula. After the test of one test section is completed, the inflatable capsules are deflated to restore their original shape, then the middle pipe is lifted or lowered to the next target test section, and the above operation is repeated to perform the water injection test of the next target test section.

[0034] As shown in Figure 3 During the test process, the water level drop process in the pipe bag is recorded by the water level gauge.

[0035] The present application also provides a portable in-hole extendable pipe bag water injection test method, which is performed by using the above device, and the method comprises the following steps:

[0036] (1) Assemble the test device: sequentially connect the weight block 1, plug 2, capsule protection platform 4, lower inflatable capsule 5 in the lower part of the middle pipe 3, set the flower pipe 6 at the middle position of the middle pipe 3, and set the upper inflatable capsule 8 on the upper part of the middle pipe 3; install the inflatable pipe 7 at the lower part of the middle pipe 3, sequentially pass through the capsule protection platform 4, lower inflatable capsule 5 and upper inflatable capsule 8 from bottom to top, and ensure that the part of the inflatable pipe 7 in the capsule is provided with an inflation hole;

[0037] (2) Connect the pipe bag and place the water level meter: connect the pipe bag 10 to the middle pipe 3 through the sealing joint 9 and extend to the drilling hole, and then place the water level meter 12 in the pipe bag 10;

[0038] (3) Lower the device to the target position: lower the assembled device to the corresponding position of the target aquifer in the hole;

[0039] (4) Inflation sealing: connect the air pump 11 through the inflatable pipe 7 to inflate the upper inflatable capsule 8 and the lower inflatable capsule 5;

[0040] (5) Water injection test and data recording: inject water into the pipe bag 10, start the water injection test, record the water level change process in the pipe bag 10 through the water level meter 12, and calculate the permeability parameter of the aquifer.

[0041] In step (1), the installation of the inflatable pipe 7 includes: using a wear-resistant and tensile hose as the inflatable pipe 7, installing its lower part beside the middle pipe 3, and setting this part as a steel pipe; one end of the inflatable pipe 7 is connected to the air pump 11, and the other end is in communication with the upper inflatable capsule 8 and the lower inflatable capsule 5, so that the inflatable pipe 7 inflates the inflatable capsules.

[0042] In step (4), the inflation sealing includes: inflating the upper inflatable capsule 8 and the lower inflatable capsule 5 through the inflatable pipe 7 to make the capsules tightly adhere to the hole wall after inflation, forming a closed environment between the target aquifer and the pipe bag 10; the upper inflatable capsule 8 and the lower inflatable capsule 5 are treated with thickening and wear resistance before use.

[0043] In step 1, when assembling the middle pipe 3, the plug 2 is used to seal the bottom pipe of the middle pipe 3.

[0044] In step 2, connecting the pipe bag 10 includes: using a steel wire hose as the pipe bag 10, connecting the extended pipe bag 10 through the sealing joints 9 at both ends; the steel wire contained in the pipe bag 10 is used to increase its strength and avoid large deformation.

[0045] In step 5, the water injection test and data recording include: stopping water injection after injecting water into the pipe bag 10 to a preset water level, recording the water level drop process in the pipe bag 10 in real time through the water level meter 12, and calculating the permeability coefficient of the aquifer based on the water level drop process.

[0046] The calculation of the aquifer permeability coefficient based on the water level drawdown process comprises:

[0047] According to the water level drawdown data of the tube bag 10 recorded by the water level gauge 12, referring to the water conservancy and hydropower engineering water injection test regulation (SL345-2007), the aquifer permeability parameters are calculated by the variable head permeability coefficient calculation formula:

[0048]

[0049] Wherein K is the aquifer permeability parameter, t0, t1, t2 is the time, is the time interval (t1-t0, t2-t1), H0, H1, H2 are the water head values recorded at time t0, t1, t2 respectively, r is the tube bag radius, r e is the borehole radius, and l is the length of the hose section between the upper inflatable capsule and the lower inflatable capsule.

[0050] The present application makes full use of the characteristics of the portable and easy-to-carry extendable tube bag, and combines the technical requirements of the water injection test, so that the borehole staged water injection test without cooperation with the drilling machine becomes simple and feasible. Using the extendable tube bag in the present application, the purpose of carrying out the water injection test in layers can be easily achieved. The simple and convenient test operation can carry out multiple tests at different time periods in the same hole to obtain the permeability parameters at different depths and different time periods, so as to reveal the time evolution characteristics of the permeability characteristics after the hole is formed.

[0051] The present application realizes the coordinated improvement of the portability, universality, sealing performance and test accuracy of the device through the integrated innovation of "modular layout + double capsule sealing + extendable tube bag + integrated inflation pipeline", which specifically shows that:

[0052] 1. Wide application scenarios: It can be adapted to different hole depths, hole wall conditions and target aquifer thicknesses, and can meet the diversified water injection test requirements in field hydrogeological exploration;

[0053] 2. Convenient and efficient operation: The characteristics of modular assembly, rapid sealing and flexible extension greatly shorten the test preparation and implementation time and reduce labor costs;

[0054] 3. Reliable and stable data: The design of double capsule precise isolation, tube bag volume stability and reliable inflation pipeline reduces test errors from the source and provides high-quality data support for the calculation of aquifer permeability parameters.

[0055] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any changes or replacements within the technical scope disclosed by the present application can be easily thought of by any person skilled in the art, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A portable in-hole extendable tube-pouch water injection test device, characterized by, The device comprises a weight block (1), a plug (2), a middle pipe (3), a capsule protection platform (4), a lower inflatable capsule (5), a flower pipe (6), an inflation pipe (7), an upper inflatable capsule (8), a sealing joint (9), a pipe bag (10), an air pump (11) and a water level gauge (12); the weight block (1), the plug (2), the capsule protection platform (4) and the lower inflatable capsule (5) are sequentially and serially installed at the lower part of the middle pipe (3), the flower pipe (6) is located at the middle position of the middle pipe (3), and the upper inflatable capsule (8) is sleeved on the upper part of the middle pipe (3); the lower part of the inflation pipe (7) is installed beside the middle pipe (3), sequentially passes through the capsule protection platform (4), the lower inflatable capsule (5) and the upper inflatable capsule (8) from bottom to top, and the part of the inflation pipe (7) in the capsule is provided with an inflation hole.

2. The portable in-hole extendable tube-packet water injection test device according to claim 1, characterized in that, The inflation pipe (7) is a wear-resistant and tensile hose, and the part of the inflation pipe (7) installed beside the middle pipe (3) is a steel pipe; the inflation pipe (7) is connected with the air pump (11) and the inflatable capsule, and is used for inflating the inflatable capsule.

3. The portable in-hole extendable tube-packet water injection test device according to claim 1, characterized in that, The upper inflatable capsule (8) and the lower inflatable capsule (5) can tightly adhere to the hole wall after being inflated and expanded by the inflation pipe (7), so that a closed environment is formed between the target aquifer and the pipe bag (10); the upper inflatable capsule (8) and the lower inflatable capsule (5) are thickened and wear-resistant treated.

4. The portable in-hole extendable tube-packet water injection test device according to claim 1, characterized in that, The bottom pipe opening of the middle pipe (3) is sealed by the plug (2).

5. The portable in-hole extendable tube-packet water injection test device according to claim 1, characterized in that, The pipe bag (10) is a steel wire-containing hose, and the two ends of the pipe bag (10) are provided with sealing joints (9) to facilitate connection and extension; the pipe bag (10) contains a steel wire, which is used for increasing the strength while avoiding large deformation.

6. The portable in-hole extendable tube-pouch water injection test device according to claim 1, characterized by, The water level gauge (12) is placed in the pipe bag (10); after water is injected into the pipe bag (10) to start the test, the water level gauge (12) is used for recording the water level drop process in the pipe bag (10), and the permeability coefficient of the aquifer is calculated according to the water level drop process in the pipe bag.

7. A method of portable in-hole extendable tube-packing water injection test, characterized in that, The device is used for the method, and the method comprises the following steps: 1) assembling the test device: sequentially and serially installing the weight block (1), the plug (2), the capsule protection platform (4) and the lower inflatable capsule (5) at the lower part of the middle pipe (3), arranging the flower pipe (6) at the middle position of the middle pipe (3), sleeving the upper inflatable capsule (8) on the upper part of the middle pipe (3), and installing the lower part of the inflation pipe (7) beside the middle pipe (3), sequentially passing through the capsule protection platform (4), the lower inflatable capsule (5) and the upper inflatable capsule (8) from bottom to top, and ensuring that the part of the inflation pipe (7) in the capsule is provided with an inflation hole; 2) connecting the pipe bag and placing the water level gauge: connecting one end of the pipe bag (10) to the middle pipe (3) through the sealing joint (9), extending the other end of the pipe bag (10) to the borehole opening, and then placing the water level gauge (12) in the pipe bag (10); 3) lowering the device to the target position: lowering the assembled device to the position corresponding to the target aquifer in the borehole; 4) inflating and sealing: connecting the air pump (11) through the inflation pipe (7), inflating the upper inflatable capsule (8) and the lower inflatable capsule (5), and making the upper inflatable capsule (8) and the lower inflatable capsule (5) tightly adhere to the borehole wall after being inflated and expanded, so that a closed environment is formed between the aquifer and the pipe bag (10). 5) Water injection test and data recording: water is injected into the tube bag (10), the water injection test is started, the water level change process in the tube bag (10) is recorded by the water level gauge (12), and the water-bearing layer permeability parameter is calculated.

8. The method of claim 7, wherein, The installation of the inflation pipe (7) in step 1) includes: using a wear-resistant and tensile hose as the inflation pipe (7), installing the lower part of the inflation pipe (7) beside the middle pipe (3), and setting the part as a steel pipe; one end of the inflation pipe (7) is connected with the air pump (11), and the other end is communicated with the upper inflation capsule (8) and the lower inflation capsule (5) to inflate the inflation capsules through the inflation pipe (7).

9. The method of claim 7, wherein, The inflation sealing in step 4) includes: inflating the upper inflation capsule (8) and the lower inflation capsule (5) through the inflation pipe (7) to make the capsules adhere to the hole wall after inflation, and form a closed environment between the target water-bearing layer and the tube bag (10); the upper inflation capsule (8) and the lower inflation capsule (5) are thickened and wear-resistant treated before use.

10. The method of claim 7, wherein, The water injection test and data recording in step 5) includes: stopping water injection after water is injected into the tube bag (10) to a preset water level, recording the water level drop data of the tube bag (10) with time in real time through the water level gauge (12), referring to the water injection test regulation (SL345-2007) of water conservancy and hydropower engineering, and calculating the water-bearing layer permeability parameter through a variable head permeability coefficient calculation formula: ； where K is the aquifer permeability parameter, is the time interval (t1-t0, t2-t1), H0, H1, H2 are the water head values at times t0, t1, t2, r is the tube radius, r e is the borehole radius, and l is the length of the hose section between the upper inflatable capsule (8) and the lower inflatable capsule (5).

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