CN111764837B - Double-end water plugging detection rod, overburden fracture drilling and measuring integrated device and drilling and measuring method - Google Patents
Double-end water plugging detection rod, overburden fracture drilling and measuring integrated device and drilling and measuring method Download PDFInfo
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- CN111764837B CN111764837B CN202010638874.5A CN202010638874A CN111764837B CN 111764837 B CN111764837 B CN 111764837B CN 202010638874 A CN202010638874 A CN 202010638874A CN 111764837 B CN111764837 B CN 111764837B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/08—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
Abstract
The invention discloses a drilling and measuring integrated device and a drilling and measuring method for a double-end water plugging detection rod and a overburden fracture, and the drilling and measuring integrated device comprises a rod body, two plugging shell layers and a pressure control valve; the rod body is provided with a plugging channel and a water injection channel; the side wall of the rod body is also provided with a water outlet communicated with the water injection channel; the two plugging shell layers are sleeved on the periphery of the rod body; the upper edge and the lower edge of each plugging shell layer are hermetically connected with the periphery of the rod body and form a closed cavity with the outer wall of the rod body; the closed cavity at the lower part is communicated with the plugging channel; the two closed cavities are communicated; after water is injected into the two closed cavities for punching, the two plugging shell layers are respectively expanded and are in sealed connection with the inner wall of the drill hole; the pressure control valve is arranged on the water injection channel at the upper part of the water outlet; after water is injected into the closed cavity for stamping, the pressure control valve is closed; when the pressure in the closed cavity is relieved, the pressure control valve is opened. The drilling and the overburden rock detection are carried out synchronously, so that the laying of other pipelines and lines in the drilling is simplified, and the reliability and the safety of the detection are improved.
Description
Technical Field
The invention belongs to the field of coal mine monitoring equipment, and particularly relates to a double-end water plugging detection rod, a overburden fracture drilling and measuring integrated device and a drilling and measuring method.
Background
After the underground working face of the coal mine is mined, a caving zone, a fissure zone and a bending subsidence zone sequentially appear on overlying strata in a goaf from bottom to top, and the water-conducting fissure zone has a good water-conducting channel, so that the determination of the development height of the water-conducting fissure zone is important for ensuring the safety of the working face and maintaining the ecological environment balance of the ground surface when the underground water body or the ecologically fragile ground surface is mined.
The existing equipment for testing the development height of the overlying strata fracture mostly adopts an underground overhead hole segmented water injection observation method, namely, a double-end plugging device is stretched into a drilled hole which is drilled in advance, the drilled hole is plugged for a certain distance in a segmented mode, water is injected into a middle plugging section, and the development degree of the overlying strata fracture is determined according to the water loss amount. A overburden water flowing fractured zone monitoring system and a detection drilling method (application number: 201110457012.3) thereof and a coal seam goaf fractured zone water injection observation system (application number: 201010218646.9) disclose a double-end water plugging observation system, wherein two pipelines are uniformly distributed in the system, and one pipeline is used for filling water (inflating) for a front capsule and a rear capsule to expand the front capsule and the rear capsule, so that two ends of a section of drilled hole are plugged; and the other path is water filling of the plugging section, and the development degree of the overlying strata fracture is determined according to the water loss amount. In the detection process, the plugging pipeline and the water injection pipeline enter a drill hole along with the probe rod and gradually go deep along with the increase of the detection depth, and the pipeline, the hole wall and the drill rod are easy to rub and extrude, so that the pipeline is damaged and broken.
In order to solve the problems, an electric control type single-loop water plugging overburden fracture detector (application number: 201210517637.9) and an electric control type single-loop water plugging overburden fracture detection method (application number: 201210517637.9) disclose a single-loop water injection observation system for a overburden fracture, wherein a plugging pipeline and a water injection pipeline are simplified into the same loop, and the problem that measurement cannot be conducted due to extrusion and friction of multiple pipelines in the detection process is solved.
The detection system is applied to drilling in advance, the detection rod is pushed into a test position in a drilled hole, according to the test principle, the drilling depth is large and penetrates through a crack area, and in the process of returning the drilling rod and pushing the detection rod, hole collapse is easily caused in the position of the crack area in the drilling hole, so that the detection work cannot be completed, and a large amount of manpower and material resources are consumed. A drilling and measuring integrated system and method (application number: 201410781189.2) for detecting the cracks of the overlying strata uses a drill rod as a pipeline, and controls different steering directions of a three-way ball valve by switching on and off an electromagnetic coil on a rod body of the probe pipe so as to realize that the drill rod respectively injects water to a drill bit, a hole sealing capsule and a drilling hole sealing section. However, in the operation process, the cable is fixed in the groove of the drill rod, the cable is easy to wind at the hole opening in the drilling process, and in addition, under the severe underground environment, the cable is easy to be damaged by friction and extrusion, so that the safety production of the mine is seriously influenced.
Disclosure of Invention
In order to solve the problems, the invention provides the double-end water plugging detection rod, the overburden fracture drilling and measuring integrated device and the drilling and measuring method, the drilling and the overburden detection are carried out synchronously, the measurement error caused by the advance punching is overcome, and the problem that the detection cannot be carried out due to hole collapse of the detection hole is avoided; meanwhile, the workload in the early detection stage is reduced, and the labor intensity of workers is reduced; the laying of other pipelines and lines in the drill hole is simplified, and the reliability and the safety of detection are improved.
The technical scheme is as follows: the invention provides a double-end water plugging detection rod, which comprises
A rod body; the rod body is provided with an axial plugging channel and a water injection channel; a water outlet is also formed in the side wall of the rod body; the water outlet is communicated with the water injection channel;
two blocking shell layers made of annular elastic materials; the two plugging shell layers are sleeved on the periphery of the rod body and are respectively positioned at the upper part and the lower part of the water outlet; the upper end edge of each plugging shell layer is hermetically connected with the periphery of the rod body; the lower end edge of each plugging shell layer is hermetically connected with the periphery of the rod body; each plugging shell layer and the outer wall of the rod body form a closed cavity; the closed cavity at the lower part is communicated with the plugging channel; the two closed cavities are communicated through a constant pressure channel; after water is injected into the two closed cavities through the plugging channels and pressurized, the two plugging shell layers are respectively expanded and are in sealed connection with the inner wall of the drill hole;
a pressure control valve; the pressure control valve is arranged on the water injection channel at the upper part of the water outlet; when water is injected into the two closed cavities for pressurizing, the pressure control valve is closed; and when the pressure in the two closed cavities is relieved, the pressure control valve is opened.
Further, the pressure control valve includes
A valve plate; the hinged end of the valve plate is hinged to the inner wall of the water injection channel; when the pressure control valve is in an open state, the hinged end of the valve plate is positioned at the lowest part of the valve plate, and the valve plate is adsorbed on the inner wall of the water injection channel; when the pressure control valve is in a closed state, the valve plate rotates along the hinged end to a medium flow direction perpendicular to the water injection channel, and the end face of the valve plate facing the water inlet direction is connected with the inner wall of the water injection channel to form a sealing pair;
a first pressure introduction channel; the first pressure guide channel is communicated with the plugging channel and the water injection channel; a first elastic diaphragm is arranged in the first pressure guide channel; when the valve plate is in the open position, after the plugging channel is filled with water and pressurized, the first elastic diaphragm extends to one side of the water filling channel, so that the valve plate is separated from the inner wall of the water filling channel, rotates to be perpendicular to the medium flow direction of the water filling channel through self weight, and is converted into a closed state;
a second pressure leading channel; the second pressure guide channel is communicated with the plugging channel and the water injection channel; a second elastic diaphragm is arranged in the first pressure guide channel; when the valve plate is in the closed position, after the plugging channel is filled with water and pressurized, the second elastic diaphragm extends out of one side of the water filling channel and applies acting force towards the water supply direction to the valve plate.
Furthermore, the pressure control valve also comprises a second push rod arranged in the second pressure guide channel and a second compression spring sleeved outside the second push rod; one end of the second compression spring, which faces the plugging channel, is connected with a second push rod, and the other end of the second compression spring, which faces the water injection channel, is connected with the inner wall of the second pressure guide channel; one end of the second push rod facing the plugging channel is connected with the second elastic diaphragm; when the valve plate is in a closed position, after the plugging channel is filled with water and pressurized, the second elastic diaphragm overcomes the compression force of a second compression spring to push the other end of a second push rod, which faces the water filling channel, to extend out to one side of the water filling channel, the other end of the second push rod is connected with the valve plate through a conical connecting pair, and the other end of the second push rod applies acting force to the valve plate in the incoming water direction; when the pressure of the blocking channel is relieved, the second compression spring extends to push the second push rod to retract into the second pressure guiding channel.
Furthermore, the pressure control valve also comprises a first push rod arranged in the first pressure guide channel and a first compression spring sleeved outside the first push rod; one end of the first compression spring, which faces the plugging channel, is connected with a first push rod, and the other end of the first compression spring, which faces the water injection channel, is connected with the inner wall of the first pressure guide channel; one end of the first push rod facing the blocking channel is connected with the first elastic diaphragm; when the valve plate is in an open position, after the plugging channel is filled with water and pressurized, the first elastic diaphragm overcomes the compression force of the first compression spring to push the other end of the first push rod, which faces the water filling channel, to extend out to one side of the water filling channel, so that the valve plate is separated from the inner wall of the water filling channel, rotates to be perpendicular to the flow direction of a medium in the water filling channel through self weight, and is converted into a closed state; when the pressure of the blocking channel is relieved, the first compression spring extends to push the first push rod to retract into the first pressure guiding channel.
Furthermore, in the sealing pair formed by connecting the end surface of the valve plate facing the water inlet direction with the inner wall of the water injection channel, the end surface of the valve plate facing the water inlet direction is a conical side wall of the valve plate, and the conical valve plate is embedded into the water injection channel.
Furthermore, both sides of each plugging shell layer are provided with a protection convex ring fixed on the rod body.
A overburden fracture drilling and measuring integrated device comprises the double-end water plugging detection rod; the drilling machine also comprises a drill bit and a plurality of sections of drill rods; each section of drill rod is provided with an axial plugging channel and a water injection channel; the double-end water plugging detection rod and the multi-section drill rod are connected end to end; the plugging channel of the double-end water plugging detection rod is correspondingly communicated with the plugging channels of the multiple sections of drill rods; and the water injection channel of the double-end water plugging detection rod and the water injection channel of the multi-section drill rod are correspondingly communicated.
Furthermore, sealing rings are embedded in the peripheries of the ports of the plugging channels at one ends of the double-end water plugging detection rod and the multi-section drill rod; and sealing rings are embedded into the peripheries of the ports of the water injection channels at one ends of the double-end water plugging detection rod and the multi-section drill rod.
Further, the overburden fracture drilling and measuring integrated device further comprises a water supply unit; the water supply unit comprises a main pipeline, and a blocking branch pipe and a water injection branch pipe which are connected in parallel on the main pipeline; the plugging branch pipe is communicated with the plugging channel of the drill rod; the water injection branch pipe is communicated with a water injection channel of the drill rod; a water inlet valve, a pressure gauge and a flow meter are arranged on the main pipeline in series; the blocking branch pipe is provided with a first pressure retaining valve and a first water drain valve; and a second pressure retaining valve and a second water drain valve are arranged on the water injection branch pipe.
A method for drilling and measuring a overburden fracture uses the integrated device for drilling and measuring the overburden fracture, and comprises the following steps:
drilling; at the moment, the pressure control valve is in an open state, and water is supplied to the water injection channel for cooling and removing powder at the drill bit;
sealing holes; when the drilling is carried out to the testing position, the drilling is stopped, and the water supply to the water injection channel is stopped; supplying water to the plugging channel, pressurizing the closed cavity, and respectively expanding the two plugging shell layers to be in sealing connection with the inner wall of the drill hole and closing the pressure control valve; stopping supplying water to the plugging channel;
detecting; supplying water to the water injection channel, wherein water flows into a drilling hole area between the two plugging shell layers from the water outlet; recording the change of water flow in unit time to finish crack detection at the position; judging the fracture development condition according to the recorded flow data and the test position;
resetting; releasing the pressure of the two closed cavities and the water injection channel; and continuously drilling to the next test position, and repeating hole sealing and detection to complete all detection work.
Has the advantages that: according to the invention, the double-end water plugging detection rod, the drill bit and the drill rod are connected, so that water can be supplied for cooling and removing powder of the drill bit in the drilling process; the two plugging shell layers of the double-end water plugging detection rod are filled with water to be expanded and sealed, the water pressure of the closed cavity is used as a power source to replace other power effects such as pneumatic power, electric power and the like, the pressure control valve is opened and closed, the purpose of injecting water into the drilling plugging section at a fixed pressure is achieved, and crack detection is completed; the laying of other pipelines and lines in the drill hole is simplified, and the reliability and the safety of detection are improved.
The invention not only ensures the water consumption for drilling, but also ensures the water supply for the detection of the overlying strata fracture, realizes the synchronous operation of drilling and the overlying strata detection, overcomes the measurement error caused by the advance punching, and avoids the problem that the detection cannot be carried out due to the hole collapse of the detection hole; meanwhile, the workload in the early detection stage is reduced, and the labor intensity of workers is reduced; the laying of other pipelines and lines in the drill hole is simplified, and the reliability and the safety of detection are improved.
The invention has simple, stable and reliable detection operation and high detection precision; the method still has certain applicability under special geological conditions such as broken rock stratum and fault, and is convenient to popularize and use.
Drawings
FIG. 1 is a schematic cross-sectional view of a double-ended water shutoff probe of the present invention;
FIG. 2 is a schematic cross-sectional view of a blocking shell layer on the upper part of the double-end water-blocking probe rod of the present invention;
FIG. 3 is a schematic cross-sectional view of a pressure control valve of the present invention;
FIG. 4 is a schematic cross-sectional view of a first pilot pressure passage of the pressure control valve of the present invention;
FIG. 5 is a schematic cross-sectional view of a second pilot pressure passage of the pressure control valve of the present invention;
FIG. 6 is a schematic cross-sectional view of a blocking shell layer at the lower part of the double-end water-blocking probe rod according to the present invention;
FIG. 7 is an exploded view of the integrated device for drilling and measuring overburden fractures of the invention;
FIG. 8 is a cross-sectional structural view of a drill rod of the present invention;
FIG. 9 is a cross-sectional view of the joint between two drill rods according to the present invention;
fig. 10 is a schematic structural view of a water supply unit of the present invention.
Detailed Description
Referring to fig. 1, the present invention provides a double-end water plugging detection rod, which includes a rod body 1, two plugging shells 2 made of annular elastic material, and a pressure control valve.
The rod body 1 is provided with an axial plugging channel 101 and a water injection channel 102; a water outlet 103 is also formed in the side wall of the rod body 1; the water outlet 103 is communicated with the water filling channel 102.
As shown in fig. 2 and fig. 6, the two plugging shell layers 2 are sleeved on the periphery of the rod body 1 and are respectively positioned at the upper part and the lower part of the water outlet 103; the upper end edge of each plugging shell layer 2 is hermetically connected with the periphery of the rod body 1; the lower end edge of each plugging shell layer 2 is hermetically connected with the periphery of the rod body 1; each plugging shell layer 2 and the outer wall of the rod body 1 form a closed cavity; the closed cavity at the lower part is communicated with the plugging channel 101; the two closed cavities are communicated through a constant pressure channel 104; when water is injected into the two closed cavities through the plugging channel 101 for pressurizing, the two plugging shell layers 2 are respectively expanded and are connected with the inner wall of the drill hole in a sealing way. And two sides of each plugging shell layer 2 are provided with a protective convex ring 105 fixed on the rod body 1.
The pressure control valve is arranged on the water injection channel 102 at the upper part of the water outlet 103; when water is injected into the two closed cavities for pressurizing, the pressure control valve is closed; and when the pressure in the two closed cavities is relieved, the pressure control valve is opened.
Specifically, as shown in FIG. 3, the pressure control valve includes
A valve plate 301; the hinged end of the valve plate 301 is hinged on the inner wall of the water injection channel 102; when the pressure control valve is in an open state, the hinged end of the valve plate 301 is located at the lowest part of the valve plate 301, and the valve plate 301 is adsorbed on the inner wall of the water injection passage 102, preferably by magnet adsorption; when the pressure control valve is in a closed state, the valve plate 301 rotates along the hinged end to be perpendicular to the medium flow direction of the water filling channel 102, and the end face of the valve plate 301 facing the water incoming direction is connected with the inner wall of the water filling channel 102 to form a sealing pair;
a first pressure introduction channel 302; as shown in fig. 4, the first pressure guiding channel 302 communicates the blocking channel 101 with the water injection channel 102; a first elastic diaphragm 3021 is arranged in the first pressure guide channel 302; when the valve plate 301 is in the open position, after the blocking channel 101 is filled with water and pressurized, the first elastic diaphragm 3021 extends towards one side of the water filling channel 102, so that the valve plate 301 is separated from the inner wall of the water filling channel 102, rotates to be perpendicular to the medium flow direction of the water filling channel 102 through self-weight, and is switched to the closed state;
a second pressure introduction channel 303; as shown in fig. 5, the second pressure guiding channel 303 communicates the blocking channel 101 with the water injection channel 102; a second elastic diaphragm 3031 is arranged in the first pressure guide channel 302; when the valve plate 301 is in the closed position, after the blocking channel 101 is filled with water and pressurized, the second elastic diaphragm 3031 extends towards one side of the water filling channel 102 and applies acting force towards the incoming water direction to the valve plate 301, so that the end face of the valve plate 301 facing the incoming water direction is connected with the inner wall of the water filling channel 102 to form a sealing pair tight connection, and effective sealing is formed.
The pressure control valve also comprises a second push rod 3032 arranged in the second pressure guide channel 303 and a second compression spring 3033 sleeved outside the second push rod 3032; one end of the second compression spring 3033 facing the plugging channel 101 is connected with a second push rod 3032, and the other end facing the water injection channel 102 is connected with the inner wall of the second pressure guide channel 303; one end of the second push rod 3032 facing the blocking channel 101 is connected with the second elastic diaphragm 3031; when the valve plate 301 is at the closed position, after the blocking channel 101 is filled with water and pressurized, the second elastic diaphragm 3031 overcomes the compression force of the second compression spring 3033 to push the other end of the second push rod 3032 facing the water filling channel 102 to extend out to one side of the water filling channel 102, the other end of the second push rod 3032 is connected with the valve plate 301 through a conical connection pair, and the other end of the second push rod 3032 applies acting force facing the water supply direction to the valve plate 301; when the pressure in the blocking channel 101 is relieved, the second compression spring 3033 extends to push the second push rod 3032 to retract into the second pressure guide channel 303.
The pressure control valve also comprises a first push rod 3022 arranged in the first pressure guide channel 302 and a first compression spring 3023 sleeved outside the first push rod 3022; one end of the first compression spring 3023 facing the blocking channel 101 is connected with a first push rod 3022, and the other end facing the water filling channel 102 is connected with the inner wall of the first pressure guide channel 302; the first push rod 3022 is connected with the first elastic diaphragm 3021 towards one end of the blocking channel 101; when the valve plate 301 is at the open position, after the blocking channel 101 is filled with water and pressurized, the first elastic diaphragm 3021 overcomes the compression force of the first compression spring 3023 to push the other end of the first push rod 3022 facing the water filling channel 102 to extend to one side of the water filling channel 102, so that the valve plate 301 is separated from the inner wall of the water filling channel 102, rotates to be perpendicular to the medium flow direction of the water filling channel 102 through self-weight, and is converted into a closed state; when the pressure in the blocking passage 101 is relieved, the first compression spring 3023 expands to push the first push rod 3022 to retract into the first pressure leading passage 302.
Specifically, the elastic coefficient of the first compression spring 3023 may be selected to be smaller than the elastic coefficient of the second compression spring 3033, so that during the pressurization of the closed cavity, the first compression spring 3023 first generates displacement to push the valve plate 301 to rotate to the closed position, and then the second compression spring 3033 starts to move to press the shutter plate 301.
In the sealing pair formed by the contact of the end surface of the valve plate 301 facing the incoming water direction and the inner wall of the water filling channel 102, the end surface of the valve plate 301 facing the incoming water direction is a tapered side wall of the valve plate 301, and the tapered valve plate 301 is embedded in the water filling channel 102 under the action of the force facing the incoming water direction applied to the valve plate 301 by the other end of the second push rod 3032, so that the sealing effect is enhanced.
The invention also provides a device integrating drilling and measuring of the overburden fracture, as shown in fig. 7, which comprises the double-end water plugging detection rod; the drilling machine also comprises a drill bit 4 and a plurality of sections of drill rods 5; as shown in fig. 8, each section of drill rod 5 is provided with an axial plugging channel 101 and a water injection channel 102; the double-end water plugging detection rod and the multi-section drill rod 5 are connected end to end through threads; the plugging channel 101 of the double-end water plugging detection rod is correspondingly communicated with the plugging channel 101 of the plurality of sections of drill rods 5; the water injection channel 102 of the double-end water plugging detection rod is correspondingly communicated with the water injection channel 102 of the multi-section drill rod 5. The double-end water plugging detection rod is positioned between the sections of drill rods 5 and the drill bit 4.
As shown in fig. 9, a sealing ring 106 is embedded in the periphery of the port of the blocking channel 101 at one end of the double-ended water-blocking detection rod and the multi-section drill rod 5; and a sealing ring 106 is embedded in the periphery of the port of the water injection channel 102 at one end of the double-end water plugging detection rod and the multi-section drill rod 5, so that water leakage at the joint of the plugging channel 101 and the joint of the water injection channel 102 is prevented.
The overburden fracture drilling and measuring integrated device further comprises a water supply unit; as shown in fig. 10, the water supply unit comprises a main pipeline 6, and a plugging branch pipe 7 and a water injection branch pipe 8 which are connected with the main pipeline 6 in parallel; the plugging branch pipe 7 is communicated with a plugging channel 101 of the drill rod 5; the water injection branch pipe 8 is communicated with a water injection channel 102 of the drill rod 5; a water inlet valve 601, a pressure gauge 602 and a flow meter 603 are arranged on the main pipeline 6 in series; a first pressure retaining valve 701 and a first water drain valve 702 are arranged on the blocking branch pipe 7; and a second pressure retaining valve 801 and a second water drain valve 802 are arranged on the water injection branch pipe 8.
A method for drilling and measuring a overburden fracture uses the integrated device for drilling and measuring the overburden fracture, and comprises the following steps:
drilling; at the moment, the pressure control valve is in an open state, and water is supplied to the water injection channel 102 and is used for cooling and removing powder at the drill bit 4;
sealing holes; when the drilling is carried out to the testing position, the drilling is stopped, and the water supply to the water injection channel 102 is stopped; opening the water inlet valve 601 and the first pressure retaining valve 701, closing the second pressure retaining valve 801, supplying water to the blocking channel 101, and pressurizing the closed cavity to enable the pressure gauge 602 to reach a set value; in the closed cavity boosting process, the two plugging shell layers 2 respectively expand to be in sealing connection with the inner wall of the drill hole, and the pressure control valve is closed; when the flow meter 603 does not change any more, closing the water inlet valve 601 and the first pressure retaining valve 701 to complete hole sealing;
detecting; opening the water inlet valve 601 and the second pressure retaining valve 801 to supply water to the water injection channel 102, so that the pressure gauge 602 reaches a set value; the water flow flows into the drilling area between the two plugging shell layers 2 from the water outlet 103; recording the change of water flow in unit time, and finishing the crack detection at the position, wherein the time is preferably 1-2 minutes; judging the fracture development condition according to the recorded flow data and the test position;
resetting; opening a first water drain valve 702 and a second water drain valve 802, and relieving pressure of the two closed cavities and the water filling channel 102; drilling is continued to the next test position, and hole sealing and detection are repeated to complete all detection work; the pressure control valve is opened and reset under the water flow of the water filling channel 102.
Claims (9)
1. A double-end water plugging detection rod is characterized in that: comprises a rod body (1); the rod body (1) is provided with an axial plugging channel (101) and a water injection channel (102); a water outlet (103) is also arranged on the side wall of the rod body (1); the water outlet (103) is communicated with the water injection channel (102);
two blocking shell layers (2) made of annular elastic materials; the two plugging shell layers (2) are sleeved on the periphery of the rod body (1) and are respectively positioned at the upper part and the lower part of the water outlet (103); the upper end edge of each plugging shell layer (2) is hermetically connected with the periphery of the rod body (1);
the lower end edge of each plugging shell layer (2) is hermetically connected with the periphery of the rod body (1); each plugging shell layer (2) and the outer wall of the rod body (1) form a closed cavity; the closed cavity at the lower part is communicated with the plugging channel (101); the two closed cavities are communicated through a constant pressure channel (104); after water is injected into the two closed cavities through the plugging channel (101) and pressurized, the two plugging shell layers (2) are respectively expanded and are in sealed connection with the inner wall of the drill hole;
a pressure control valve; the pressure control valve is arranged on a water injection channel (102) at the upper part of the water outlet (103); when water is injected into the two closed cavities for pressurizing, the pressure control valve is closed; when the pressure in the two closed cavities is relieved, the pressure control valve is opened;
the pressure control valve comprises a valve plate (301); the hinged end of the valve plate (301) is hinged to the inner wall of the water injection channel (102); when the pressure control valve is in an open state, the hinged end of the valve plate (301) is positioned at the lowest part of the valve plate (301), and the valve plate (301) is adsorbed on the inner wall of the water filling channel (102); when the pressure control valve is in a closed state, the valve plate (301) rotates along the hinged end to be perpendicular to the medium flow direction of the water injection channel (102), and the end face, facing the water inflow direction, of the valve plate (301) is connected with the inner wall of the water injection channel (102) to form a sealing pair;
a first pressure introduction channel (302); the first pressure guide channel (302) is communicated with the plugging channel (101) and the water injection channel (102);
a first elastic diaphragm (3021) is arranged in the first pressure guide channel (302); when the valve plate (301) is in an open position, after the blocking channel (101) is filled with water and pressurized, the first elastic diaphragm (3021) extends towards one side of the water filling channel (102), so that the valve plate (301) is separated from the inner wall of the water filling channel (102), rotates to be perpendicular to the medium flow direction of the water filling channel (102) through self weight, and is converted into a closed state;
a second pressure introduction channel (303); the second pressure guide channel (303) is communicated with the plugging channel (101) and the water injection channel (102);
a second elastic diaphragm (3031) is arranged in the first pressure guide channel (302); when the valve plate (301) is at the closed position, after the blocking channel (101) is filled with water and pressurized, the second elastic diaphragm (3031) extends towards one side of the water filling channel (102) and applies acting force towards the incoming water direction to the valve plate (301).
2. The double-ended water shutoff probe rod of claim 1, wherein: the pressure control valve also comprises a second push rod (3032) arranged in the second pressure guide channel (303) and a second compression spring (3033) sleeved outside the second push rod (3032); one end of the second compression spring (3033) facing the plugging channel (101) is connected with a second push rod (3032), and the other end of the second compression spring facing the water injection channel (102) is connected with the inner wall of the second pressure guide channel (303); one end of the second push rod (3032) facing the blocking channel (101) is connected with the second elastic diaphragm (3031); when the valve plate (301) is in a closed position, after the blocking channel (101) is filled with water and pressurized, the second elastic diaphragm (3031) overcomes the compression force of the second compression spring (3033) to push the other end of the second push rod (3032) facing the water filling channel (102) to extend out to one side of the water filling channel (102), the other end of the second push rod (3032) is connected with the valve plate (301) through a conical connection pair, and the other end of the second push rod (3032) applies acting force facing the incoming water direction to the valve plate (301); when the pressure in the blocking channel (101) is relieved, the second compression spring (3033) extends to push the second push rod (3032) to retract into the second pressure guide channel (303).
3. The double-ended water shutoff probe rod of claim 2, wherein: the pressure control valve also comprises a first push rod (3022) arranged in the first pressure guide channel (302) and a first compression spring (3023) sleeved outside the first push rod (3022); one end of the first compression spring (3023) facing the blocking channel (101) is connected with a first push rod (3022), and the other end facing the water filling channel (102) is connected with the inner wall of the first pressure guide channel (302); one end of the first push rod (3022) facing the blocking channel (101) is connected with a first elastic diaphragm (3021); when the valve plate (301) is in an open position, after the blocking channel (101) is filled with water and pressurized, the first elastic diaphragm (3021) overcomes the compression force of the first compression spring (3023) to push the other end of the first push rod (3022) facing the water filling channel (102) to extend towards one side of the water filling channel (102), so that the valve plate (301) is separated from the inner wall of the water filling channel (102), rotates to be vertical to the medium flow direction of the water filling channel (102) through self weight, and is switched to a closed state; when the pressure in the blocking channel (101) is relieved, the first compression spring (3023) extends to push the first push rod (3022) to retract into the first pressure guide channel (302).
4. A double ended water shutoff probe rod according to claim 3, wherein: in the sealing pair formed by connecting the end surface of the valve plate (301) facing the incoming water direction with the inner wall of the water filling channel (102), the end surface of the valve plate (301) facing the incoming water direction is a tapered side wall of the valve plate (301), and the tapered valve plate (301) is embedded in the water filling channel (102).
5. The double-ended water shutoff probe rod of claim 1, wherein: and two sides of each plugging shell layer (2) are provided with a protection convex ring (105) fixed on the rod body (1).
6. The utility model provides a overburden fracture bores survey integrated device which characterized in that: comprises the double-ended water plugging detection rod of any one of claims 1-4; the drilling machine also comprises a drill bit (4) and a plurality of sections of drill rods (5); each section of drill rod (5) is provided with an axial plugging channel (101) and a water injection channel (102); the double-end water plugging detection rod and the multi-section drill rod (5) are connected end to end; the plugging channel (101) of the double-end water plugging detection rod is correspondingly communicated with the plugging channel (101) of the plurality of sections of drill rods (5); the water injection channel (102) of the double-end water plugging detection rod is correspondingly communicated with the water injection channel (102) of the multi-section drill rod (5).
7. The overburden fracture drilling and testing integrated device of claim 6, wherein: a sealing ring (106) is embedded into the periphery of the port of the plugging channel (101) at one end of the double-end water plugging detection rod and the multi-section drill rod (5); and a sealing ring (106) is embedded into the periphery of the port of the water injection channel (102) at one end of the double-end water plugging detection rod and the multi-section drill rod (5).
8. The overburden fracture drilling and testing integrated device of claim 7, wherein: the device also comprises a water supply unit; the water supply unit comprises a main pipeline (6), and a plugging branch pipe (7) and a water injection branch pipe (8) which are connected in parallel on the main pipeline (6); the plugging branch pipe (7) is communicated with a plugging channel (101) of the drill rod (5); the water injection branch pipe (8) is communicated with a water injection channel (102) of the drill rod (5); a water inlet valve (601), a pressure gauge (602) and a flow meter (603) are arranged on the main pipeline (6) in series; the blocking branch pipe (7) is provided with a first pressure retaining valve (701) and a first water drain valve (702); and a second pressure retaining valve (801) and a second water drain valve (802) are arranged on the water injection branch pipe (8).
9. A method for drilling and measuring a overburden fracture is characterized by comprising the following steps: an integrated overburden fracture drilling and testing device as defined in any one of claims 6 to 8, comprising: drilling; at the moment, the pressure control valve is in an open state, water is supplied to the water injection channel (102) and is used for cooling and removing powder at the drill bit (4);
sealing holes; when the drill bit drills to the testing position, the drilling is stopped, and water supply to the water injection channel (102) is stopped; supplying water to the plugging channel (101), pressurizing the closed cavity, expanding the two plugging shell layers (2) respectively to be in sealing connection with the inner wall of the drill hole, and closing the pressure control valve; stopping supplying water to the plugging channel (101);
detecting; water is supplied to the water injection channel (102), and water flows into a drilling area between the two plugging shell layers (2) from the water outlet (103); recording the change of water flow in unit time to finish crack detection at the position; judging the fracture development condition according to the recorded flow data and the test position;
resetting; the two closed cavities and the water injection channel (102) are depressurized; and continuously drilling to the next test position, and repeating hole sealing and detection to complete all detection work.
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| CN113027513B (en) * | 2021-04-30 | 2023-05-16 | 西安科技大学 | Device and method for predicting fracture zone by underground segmented hole-elevation water injection |
| CN114594036B (en) * | 2022-03-30 | 2023-07-14 | 中国水利水电科学研究院 | Quick determination device for permeability coefficient of soil material |
| CN114594037B (en) * | 2022-03-30 | 2023-07-07 | 中国水利水电科学研究院 | Method for measuring permeability coefficient of soil material |
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| US8631867B2 (en) * | 2008-12-23 | 2014-01-21 | Halliburton Energy Services, Inc. | Methods for cooling measuring devices in high temperature wells |
| CN102565859B (en) * | 2011-12-31 | 2013-08-07 | 山东科技大学 | Overburden water flowing fractured zone observation system and detection drilling method thereof |
| CN202851004U (en) * | 2012-11-06 | 2013-04-03 | 山东科技大学 | Dual-end constant pressure water-plugging feeler lever for detecting overlying strata crack |
| CN103016007B (en) * | 2012-12-05 | 2015-05-27 | 山东科技大学 | Electronically controlled single-loop water-plugging overburden strata fracture detection method and probing machine |
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