CN114837603A - Borehole water-pressurizing test plug and system - Google Patents
Borehole water-pressurizing test plug and system Download PDFInfo
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- CN114837603A CN114837603A CN202210580672.9A CN202210580672A CN114837603A CN 114837603 A CN114837603 A CN 114837603A CN 202210580672 A CN202210580672 A CN 202210580672A CN 114837603 A CN114837603 A CN 114837603A
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- 238000012360 testing method Methods 0.000 title claims abstract description 73
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 166
- 238000000429 assembly Methods 0.000 claims abstract description 16
- 230000000712 assembly Effects 0.000 claims abstract description 16
- 238000005553 drilling Methods 0.000 claims description 28
- 239000007788 liquid Substances 0.000 claims description 16
- 230000001105 regulatory effect Effects 0.000 claims description 11
- 238000002474 experimental method Methods 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 16
- 239000011435 rock Substances 0.000 description 31
- 208000005189 Embolism Diseases 0.000 description 27
- 230000035699 permeability Effects 0.000 description 11
- 239000011148 porous material Substances 0.000 description 9
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000005476 size effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/128—Packers; Plugs with a member expanded radially by axial pressure
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/008—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells by injection test; by analysing pressure variations in an injection or production test, e.g. for estimating the skin factor
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a borehole water pressure test plug and a system in the technical field of borehole water pressure tests. The plug includes: compressing the spring; the center of the ring piece assembly is provided with a threaded through hole, the number of the ring piece assemblies is two, and the two ring piece assemblies are respectively and fixedly connected to two ends of the pressure spring; the sleeve is sleeved on the periphery of the pressure spring and positioned between the two ring piece assemblies, and two ends of the sleeve respectively abut against the opposite surfaces of the two ring piece assemblies; the periphery of the hollow joint is provided with an external thread matched with the threaded through hole; and the hollow joint at one end of the female screw joint is matched, and the other end of the female screw joint is matched with the drill rod joint. The plug is internally provided with the pressure spring outer casing, the water stopping effect is good, meanwhile, the hose is not needed for supplying air (water), the structure is simple, the operation is simple and convenient, and the test efficiency can be improved.
Description
Technical Field
The invention relates to the technical field of borehole water pressure tests, in particular to a borehole water pressure test plug and a system.
Background
Engineering geological exploration needs to know the water permeability of a rock mass, and a main task of a drilling water-pressure test is to determine the water permeability of the rock mass and provide basic data for evaluating the permeability characteristics of the rock mass and designing a permeability control measure.
The borehole water-pressurizing test is characterized in that a plug is used for blocking the wall of a borehole aiming at a specific test section, the borehole with a certain length is isolated, the test section is isolated, then water is pressurized into the section of the borehole by a fixed water head, and the permeability coefficient of the rock of the test section can be measured according to the pressing-in flow of the water-pressurizing test, the full pressure acting in the test section and the length of the test section.
The prior embolism and water pressing system has the following problems and disadvantages:
(1) the expansion deformation of the plug is not large enough;
during a water pressure test, after the existing plug is inflated (water) by a plug rubber tube, the plug generates transverse expansion deformation, and the plug extrudes the hole wall, so that the aim of stopping water is fulfilled. However, the existing plug is limited by a tiny hose (including a joint), the input pressure is limited, and the hose or the joint can burst due to too much pressure. The transverse expansion deformation of the plug is not large enough, the extrusion to the rock on the hole wall is limited, and the crack of the rock on the hole wall is gradually propped open under the action of high-pressure water flow to generate seepage, so that the water stop of the plug is ineffective or the water stop effect is poor.
(2) Plug size effects, leading to plug sticking;
in order to be in close contact with the hole wall, the diameter of the existing plug is only slightly smaller than the hole diameter of a drill hole, and if the rock is complete and the hole wall is smooth, the plug is smooth up and down; however, due to various reasons, joint cracks develop in the rock, the rock on the hole wall has cracks, the rock is likely to fall off from a local broken part, and rock powder particles are remained and precipitated during drilling.
(3) The plug is provided with a tiny hose, and the hose is easy to wind the drill rod during installation and disassembly;
the plug needs to be supplied with air (water) through a hose, the hose and a drill rod need to be installed synchronously when the plug is installed in a water pressure test, the drill rod is lengthened one by one after the hose is installed, the hose is difficult to rotate in the process of putting the drill rod and the plug system down together, and the hose is easy to wind the drill rod. In addition, after the water pressure test is finished, the plug and the drill rod need to be pulled out, the drill rod can also rotate, and the winding degree of the hose and the drill rod can be aggravated.
Disclosure of Invention
This application is through providing a drilling pressurized-water test embolism and system, solves or partially solves the problem of the existence of current embolism in drilling pressurized-water test.
The embodiment of the application provides a drilling pressurized-water test plug, include:
a pressure spring;
the center of each ring piece assembly is provided with a threaded through hole, and the number of the ring piece assemblies is two, and the two ring piece assemblies are fixedly connected to two ends of the pressure spring respectively;
the sleeve is sleeved on the periphery of the pressure spring and positioned between the two ring piece assemblies, and two ends of the sleeve respectively abut against the opposite surfaces of the two ring piece assemblies;
the periphery of the hollow joint is provided with an external thread matched with the threaded through hole;
and one end of the female screw joint is matched with the hollow joint, and the other end of the female screw joint is matched with the drill rod joint.
The beneficial effects of the above embodiment are as follows:
firstly, the built-in pressure spring of embolism can guarantee the embolism at vertical deflection, and the embolism rubber tube receives the influence of vertical compression deformation, produces horizontal expansion deformation, extrudees the pore wall, can not only make the close contact of embolism rubber tube with the pore wall rock, but also can force embolism department rock crack not washed away by high-pressure rivers through extruding the pore wall rock, realizes dual stagnant water, and embolism stagnant water effect is better. The plug can bear wide deformation, the borne pressure is brought by the upper drill rod and an external drill rod pressurizing device, and the pressure can be adjusted according to the water stopping condition. Because the large deformation of the plug brings better water stopping effect, the water stopping effect that the plug position can be determined only by continuously and repeatedly testing the traditional plug in the past is changed, the testing efficiency and the testing success rate are improved, and time and labor are saved. And the test only needs to dismantle and change the sample installation device in the test system at every turn, and other positions do not need to carry out secondary installation, and the operation is very simple, convenient.
Secondly, the plug with the built-in pressure spring and the external casing does not need a hose for supplying air (water), the structure is simpler, the problem that the hose winds the drill rod is avoided, the operation is simpler and more convenient, the plug is not easy to damage, and the plug is safe and durable. The outer diameter of the drill bit is slightly smaller than the diameter of a drill hole, so that the drill bit is more convenient to install and pull up, rock powder and small rock falling blocks cannot block plugs, the test efficiency can be improved, and the drilling and test safety is guaranteed.
In addition, the multiple sections of the embolism are combined and connected with each other through the hollow joint, the length of the combined embolism is adjusted, and the embolism required by a water pressure test can be flexibly configured according to the lithology of the drill hole.
On the basis of the above embodiments, the present application can be further improved, specifically as follows:
in one embodiment of the present application, the ring plate assembly includes a ring plate one, a sealing gasket and a ring plate two, and the sealing gasket is disposed between the ring plate one and the ring plate two. The sealing gasket is generally a rubber gasket and is used for stopping water.
In one embodiment of the present application, the cannula is a rubber tube.
The embodiment of the application also provides a drilling pressurized-water experimental system, including: the water supply device comprises a water supply drill rod, a plug, a floral tube and a water pressing assembly, wherein the plug, the floral tube and the water pressing assembly are arranged in the water supply drill rod, one end of the plug is connected with the water supply drill rod, the other end of the plug is connected with the floral tube, the water supply drill rod and the floral tube are arranged in a hollow mode, water flow channels communicated with each other are formed in the water supply drill rod, the plug and the floral tube, the water pressing assembly comprises a water pump and a water tank, a liquid inlet end of the water pump is communicated with the water tank, and a liquid outlet end of the water pump is communicated with the interior of the water supply drill rod.
The beneficial effects of the above embodiment are as follows: aiming at the single-plug drilling test, water is pressed into a water flow channel inside a water supply drill rod through a water pump, the plug seals the hole wall, water overflows from the peripheral surface holes of the perforated pipe, and the rock stratum water permeability of the perforated pipe section is tested and detected. The plug with the built-in pressure spring and the external casing does not need hose air supply (water), has simpler structure, does not cause the problem that the hose winds the drill rod, has simpler and more convenient operation, is not easy to damage, and is safe and durable. The outer diameter of the drill bit is slightly smaller than the diameter of a drill hole, so that the drill bit is more convenient to install and pull up, rock powder and small rock falling blocks cannot block plugs, the test efficiency can be improved, and the drilling and test safety is guaranteed. Meanwhile, due to the fact that large deformation of the plug brings better water stopping effect, the water stopping effect that the plug position can be determined only by continuously and repeatedly testing the traditional plug is changed, the testing efficiency and the testing success rate are improved, and time and labor are saved. And the test only needs to dismantle and change the sample installation device in the test system at every turn, and other positions do not need to carry out secondary installation, and the operation is very simple, convenient.
In one embodiment of the application, the borehole water pressure experiment system further comprises a drill rod pressurizing device, and the drill rod pressurizing device is used for pressurizing the water conveying drill rod. The plug is pressed to generate wide deformation, the borne pressure is brought by an upper drill rod and an external drill rod pressurizing device, the pressure can be adjusted according to the water stopping condition, and the drill rod pressurizing device can be a hydraulic cylinder and the like as long as the water conveying drill rod can be pressurized.
In one of them embodiment of this application, the pressurized-water subassembly still includes tee bend flow control valve, wet return, flowmeter, manometer, the play liquid end of water pump with tee bend flow control valve's feed liquor end is connected, tee bend flow control valve's play liquid end one with send the inside intercommunication of water drilling rod, tee bend flow control valve's play liquid end two-pass the wet return with the water tank intercommunication, the flowmeter set up in tee bend flow control valve with send between the water drilling rod, the manometer is used for detecting the inside water pressure of sending the water drilling rod. The water pressure is convenient to adjust and detect.
In one embodiment of the application, the drilling water-pressurizing experimental system further comprises another plug and a supporting drill rod, one end of the floral tube is connected with the plug, the other end of the floral tube is connected with the another plug, one end of the another plug is connected with the floral tube, and the other end of the another plug is connected with the supporting drill rod. Aiming at a double-plug drilling water-pressing test, the bottom of a support drill rod is sealed, the upper plug and the lower plug of a perforated pipe are stressed and then sealed to stop water, and the test detects the permeability of the rock stratum of the perforated pipe section.
The embodiment of the application also provides a drilling water-pressurizing experimental method, and the drilling water-pressurizing experimental system comprises the following steps:
drilling holes, wherein the hole diameter of each drilling hole is matched with that of the plug;
placing the perforated pipe, the plug and the upper drill rod in the drill hole in sequence;
pressing the drill rod downwards, and extruding the hole wall by the plug to stop water;
and carrying out a pressurized water test.
The beneficial effects of the above embodiment are as follows: the plug with the built-in pressure spring and the external casing does not need hose air supply (water), has simpler structure, does not cause the problem that the hose winds the drill rod, has simpler and more convenient operation, is not easy to damage, and is safe and durable. Meanwhile, the water stopping effect that the position of the embolism can be determined only by continuously and repeatedly testing the traditional embolism in the past is changed, the testing efficiency and the testing success rate are improved, and time and labor are saved.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
1. the built-in pressure spring of embolism can guarantee that the embolism is at vertical deflection, and the embolism rubber tube receives vertical compression deformation's influence, produces horizontal expansion deformation, extrudees the pore wall, can not only make the inseparable contact of embolism rubber tube with the pore wall rock, but also can force embolism department rock crack not washed out by high-pressure rivers through extrusion pore wall rock, realizes dual stagnant water, and embolism stagnant water effect is better.
2. The plug with the built-in pressure spring and the external casing does not need hose air supply (water), has simpler structure, does not cause the problem that the hose winds the drill rod, has simpler and more convenient operation, is not easy to damage, and is safe and durable. The outer diameter of the drill bit is slightly smaller than the diameter of a drill hole, so that the drill bit is more convenient to install and pull up, rock powder and small rock falling blocks cannot block plugs, the test efficiency can be improved, and the drilling and test safety is guaranteed.
3. Because the large deformation of the plug brings better water stopping effect, the water stopping effect that the plug position can be determined only by continuously and repeatedly testing the traditional plug in the past is changed, the testing efficiency and the testing success rate are improved, and time and labor are saved.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a schematic view of the structure of a plug in example 1;
FIG. 2 is a schematic structural diagram of a single-plug borehole water-pressurizing experimental system in example 2;
FIG. 3 is a schematic structural diagram of a double-plug drilling and water-pressurizing experimental system in example 2;
FIG. 4 is a flow chart of the steps of the experimental method for water pressurization in a borehole in example 3.
The water supply system comprises a plug 1, a pressure spring 11, a pressure spring 12, a ring plate assembly 121, a ring plate I, a seal gasket 122, a seal gasket 123, a ring plate II, a sleeve 13, a hollow joint 14, a female screw joint 15, a drill rod joint 16, a water supply drill rod 2, a flower tube 3, a water pump 41, a water tank 42, a water tank 43, a three-way flow regulating valve 44, a water return pipe 45, a flow meter 46, a pressure meter 5 and a support drill rod.
Detailed Description
The present invention is further described below in conjunction with the specific embodiments, it is to be understood that these embodiments are merely illustrative of the present invention and are not intended to limit the scope of the present invention, and various equivalent modifications of the present invention will fall within the scope of the appended claims of the present application after reading the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In describing the invention, it is not necessary for a schematic representation of the above terminology to be directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples of the invention and features of different embodiments or examples described herein may be combined and combined by those skilled in the art without contradiction.
In order to solve the above problems, the technical solution in the embodiment of the present application has the following general idea:
example 1:
as shown in fig. 1, a borehole water test plug comprises: the compression spring 11, the ring piece assembly 12, the sleeve 13, the hollow joint 14 and the female screw joint 15;
the center of the ring piece assembly 12 is provided with a threaded through hole, two ring piece assemblies 12 are arranged, and the two ring piece assemblies 12 are respectively and fixedly connected to two ends of the pressure spring 11; the sleeve 13 is sleeved on the periphery of the pressure spring 11, the sleeve 13 is positioned between the two ring piece assemblies 12, and two ends of the sleeve 13 respectively abut against the opposite surfaces of the two ring piece assemblies 12; the periphery of the hollow joint 14 is provided with an external thread matched with the threaded through hole; the female screw joint 15 has one end matched with the hollow joint 14 and the other end matched with the drill rod joint 16.
The ring plate assembly 12 comprises a first ring plate 121, a sealing gasket 122 and a second ring plate 123, wherein the sealing gasket 122 is arranged between the first ring plate 121 and the second ring plate 123. The sealing gasket 122 is typically a rubber gasket to provide a water stop function. The cannula 13 is typically a rubber tube.
Example 2:
as shown in fig. 2, a borehole water-pressing experiment system, which is suitable for a single-plug situation, includes: as shown in the embodiment 1, the plug 1, the water feeding drill rod 2, the floral tube 3, the water pressurizing assembly and the drill rod pressurizing device (not shown in the figure) are provided, one end of the plug 1 is connected with the water feeding drill rod 2, the other end of the plug 1 is connected with the floral tube 3, the interiors of the water feeding drill rod 2 and the floral tube 3 are all arranged in a hollow manner, water flow channels which are communicated with each other are formed in the interiors of the water feeding drill rod 2, the plug 1 and the floral tube 3, the water pressurizing assembly comprises a water pump 41, a water tank 42, a three-way flow regulating valve 43, a water return pipe 44, a flow meter 45 and a pressure gauge 46, a liquid inlet end of the water pump 41 is communicated with the water tank 42, a liquid outlet end of the water pump 41 is connected with a liquid inlet end of the three-way flow regulating valve 43, a liquid outlet end of the three-way flow regulating valve 43 is communicated with the interior of the water feeding drill rod 2, a liquid outlet end of the three-way flow regulating valve 43 is communicated with the water tank 42 through the water return pipe 44, the flow meter 45 is arranged between the three-way flow regulating valve 43 and the water feeding drill rod 2, the pressure gauge 46 is used for detecting the water pressure inside the water feeding drill rod 2. The water pressure is convenient to adjust and detect.
Optionally, as shown in fig. 3, the drilling and water-pressing experiment system under the condition of double plugs further includes another plug 1 and a support drill rod 5, one end of the perforated pipe 3 is connected with the plug 1, the other end of the perforated pipe is connected with the other plug 1, one end of the other plug 1 is connected with the perforated pipe 3, and the other end of the other plug is connected with the support drill rod 5. Aiming at a double-plug 1 drilling water pressing test, the bottom of a support drill rod 5 is sealed, water is sealed after the upper plug 1 and the lower plug 1 of a floral tube 3 are stressed, and the water permeability of 3 sections of terranes of the floral tube is detected in the test.
A drill rod pressurizing device (not shown) is used for pressurizing the water feeding drill rod. The plug is pressed to generate wide deformation, the borne pressure is brought by an upper drill rod and an external drill rod pressurizing device, the pressure can be adjusted according to the water stopping condition, and the drill rod pressurizing device can be a hydraulic cylinder and the like as long as the water conveying drill rod can be pressurized.
Example 3:
as shown in fig. 4, a borehole water-pressurizing experimental method, which adopts the borehole water-pressurizing experimental system described in embodiment 2, includes the following steps:
and S1, drilling a hole, wherein the hole diameter of the hole is matched with that of the plug.
The drilling hole of the water pressure test is preferably drilled by adopting diamond or alloy, and the aperture of the drilling hole is matched with the plug.
The trial section is selected by first determining the location of the embolism. According to the integrity degree of the drill core, the hole wall section with better rock integrity can be selected as the position for placing the plug.
The plug length is not less than 8 times the borehole diameter. The plug is assembled in sections, so that the total length of the plug is matched with the requirement of a pressurized water test.
The length of the test segment is generally not more than 5m, and adjacent test segments are connected with each other and can be overlapped slightly but cannot be leaked.
And S2, sequentially placing the perforated pipe, the plug and the upper drill rod in the drill hole.
S3, pressing the drill rod downwards, and pressing the plug to the hole wall to stop water.
Before the test, the static water level in the drill hole is measured.
After the water level is stable, the drill rod is properly pressed down by using a drill rod pressurizing device, and because the bottom of the hole is provided with a support drill rod (or a perforated pipe), the upper drill rod bears pressure and then transfers the pressure to a pressure spring in the plug, the pressure spring is compressed and deformed to drive the plug rubber pipe to generate compression deformation and transverse expansion, and the plug extrudes the hole wall.
Observing the static water level again, and if the water level is unchanged or has no obvious rising trend, judging that the water stopping is effective; if the water level has obvious rising trend, the pressure of the drill rod needs to be gradually increased, so that the plug compression spring generates larger deformation, and the aim of stopping water is finally fulfilled.
And S4, performing a pressurized water test.
The water pressure test should be carried out in three stages (i.e., P1- -P2- -P3- -P4- -P5) under three pressures, wherein: p1 ═ P5, P2 ═ P4, P1 < P2 < P3.
During the pressurized water test, the indentation flow Q is recorded at each pressure stage.
And (4) drawing a P-Q relation curve by using the result of the pressurized water test data, and determining the curve type of the test section according to the characteristics of the P-Q curve.
The water permeability of the test section adopts a pressure value (P3) and a flow value (Q3) of the third stage according to the formula: the water permeability of the test section was calculated (Q3)/(L (P3)).
Wherein: q- -water permeability (Lu) of the test section;
l-segment length (m);
q3-third stage calculated flow (l/min);
p3- -pressure in the third stage (MPa).
The technical scheme in the embodiment of the application at least has the following technical effects or advantages:
1. the built-in pressure spring of embolism can guarantee the embolism at vertical deflection, and the embolism rubber tube receives vertical compression deformation's influence, produces horizontal expansion deformation, extrudees the pore wall, can not only make the inseparable contact of embolism rubber tube with the pore wall rock, but also can force embolism department rock crack not washed away by high-pressure rivers through extrusion pore wall rock, realizes dual stagnant water, and embolism stagnant water effect is better.
2. The plug with the built-in pressure spring and the external casing does not need hose air supply (water), has simpler structure, does not cause the problem that the hose winds the drill rod, has simpler and more convenient operation, is not easy to damage, and is safe and durable. The outer diameter of the drill bit is slightly smaller than the diameter of a drill hole, so that the drill bit is more convenient to install and pull up, rock powder and small rock falling blocks cannot block plugs, the test efficiency can be improved, and the drilling and test safety is guaranteed.
3. Because the large deformation of the plug brings better water stopping effect, the water stopping effect that the plug position can be determined only by continuously and repeatedly testing the traditional plug in the past is changed, the testing efficiency and the testing success rate are improved, and time and labor are saved.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (8)
1. A drill water test plug, comprising:
compressing the spring;
the center of each ring piece assembly is provided with a threaded through hole, and the number of the ring piece assemblies is two, and the two ring piece assemblies are fixedly connected to two ends of the pressure spring respectively;
the sleeve is sleeved on the periphery of the pressure spring and positioned between the two ring piece assemblies, and two ends of the sleeve respectively abut against the opposite surfaces of the two ring piece assemblies;
the periphery of the hollow joint is provided with an external thread matched with the threaded through hole;
and one end of the female screw joint is matched with the hollow joint, and the other end of the female screw joint is matched with the drill rod joint.
2. The drill water test plug of claim 1, wherein: the ring piece assembly comprises a ring piece I, a sealing gasket and a ring piece II, and the sealing gasket is arranged between the ring piece I and the ring piece II.
3. The drill water test plug of claim 1, wherein: the sleeve is a rubber tube.
4. A borehole water-pressurizing experiment system, comprising: the water supply device comprises a water supply drill rod, a plug according to any one of claims 1 to 3, a floral tube and a water pressing assembly, wherein one end of the plug is connected with the water supply drill rod, the other end of the plug is connected with the floral tube, the interiors of the water supply drill rod and the floral tube are both arranged in a hollow mode, water flow channels communicated with each other are formed in the interiors of the water supply drill rod, the plug and the floral tube, the water pressing assembly comprises a water pump and a water tank, the liquid inlet end of the water pump is communicated with the water tank, and the liquid outlet end of the water pump is communicated with the interior of the water supply drill rod.
5. The borehole water-pressurizing experimental system as set forth in claim 4, wherein: the water supply drill pipe pressure device is used for pressing the water supply drill pipe.
6. The borehole water-logging experimental system according to claim 5, wherein: the water pressing component further comprises a three-way flow regulating valve, a water return pipe, a flowmeter and a pressure gauge, wherein the liquid outlet end of the water pump is connected with the liquid inlet end of the three-way flow regulating valve, the liquid outlet end of the three-way flow regulating valve is communicated with the inside of the water feeding drill rod, the liquid outlet end of the three-way flow regulating valve is communicated with the water return pipe and the water tank, the flowmeter is arranged between the three-way flow regulating valve and the water feeding drill rod, and the pressure gauge is used for detecting the water pressure inside the water feeding drill rod.
7. The borehole water-pressurizing experimental system as set forth in claim 6, wherein: the drill pipe comprises a flower pipe, a support drill rod and a plug, wherein one end of the flower pipe is connected with the plug, the other end of the flower pipe is connected with the plug, one end of the plug is connected with the flower pipe, and the other end of the plug is connected with the support drill rod.
8. The borehole water-pressurizing experimental method is characterized in that the borehole water-pressurizing experimental system according to any one of claims 4 to 6 is adopted, and the method comprises the following steps:
drilling holes, wherein the hole diameter of each drilling hole is matched with that of the plug;
placing the perforated pipe, the plug and the upper drill rod in the drill hole in sequence;
pressing the drill rod downwards, and extruding the hole wall by the plug to stop water;
and carrying out a pressurized water test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210580672.9A CN114837603B (en) | 2022-05-25 | 2022-05-25 | Drilling pressurized water test plug and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210580672.9A CN114837603B (en) | 2022-05-25 | 2022-05-25 | Drilling pressurized water test plug and system |
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| CN114837603B (en) | 2024-05-07 |
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