CN114856546A - Ultra-long drilling self-advancing type guide drill traction capsule pressure measuring and hole sealing device and method - Google Patents
Ultra-long drilling self-advancing type guide drill traction capsule pressure measuring and hole sealing device and method Download PDFInfo
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- CN114856546A CN114856546A CN202210452332.8A CN202210452332A CN114856546A CN 114856546 A CN114856546 A CN 114856546A CN 202210452332 A CN202210452332 A CN 202210452332A CN 114856546 A CN114856546 A CN 114856546A
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- 238000007789 sealing Methods 0.000 title claims abstract description 81
- 239000002775 capsule Substances 0.000 title claims abstract description 74
- 238000005553 drilling Methods 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 40
- 238000009530 blood pressure measurement Methods 0.000 claims abstract description 34
- 239000003245 coal Substances 0.000 claims abstract description 26
- 239000007789 gas Substances 0.000 claims description 32
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 24
- 229910052757 nitrogen Inorganic materials 0.000 claims description 13
- 238000010276 construction Methods 0.000 claims description 11
- 238000009434 installation Methods 0.000 claims description 11
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 239000011435 rock Substances 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 4
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
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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
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
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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
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
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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
- E21B23/00—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
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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
- E21B23/00—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
- E21B23/001—Self-propelling systems or apparatus, e.g. for moving tools within the horizontal portion of a borehole
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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
- E21B23/00—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
- E21B23/04—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells operated by fluid means, e.g. actuated by explosion
- E21B23/0416—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells operated by fluid means, e.g. actuated by explosion characterised by force amplification arrangements
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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
- E21B33/12—Packers; Plugs
- E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
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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
- E21B33/12—Packers; Plugs
- E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a self-propelled guide drill bit traction capsule pressure measuring and hole sealing device and a method for an ultra-long drill hole, which relate to the technical field of coal bed gas pressure measurement and comprise a self-driving traction system, a hole sealing component and a pressure measuring component, wherein the self-driving traction system comprises a self-driving traction unit and a water supply unit, the self-driving traction unit is a self-propelled guide drill bit, the self-propelled guide drill bit is provided with a rear nozzle, high-pressure water jet formed at the nozzle provides recoil force to enable the self-propelled guide drill bit to pull the hole sealing component and the pressure measuring component to advance in the drill hole until reaching a hole sealing pressure measuring point, the water supply unit of the self-driving traction system is a high-pressure pump station and a high-pressure rubber pipe, and the high-pressure rubber pipe has the characteristics of softness and flexibility, the drill rod can be bent along with the change of the angle of the drill hole in the directional long drill hole, so that the problem that the drill rod cannot reach a pressure measuring point due to the angle in the drill hole in the process of feeding the drill rod of the mechanical drilling machine into the pressure measuring device is solved.
Description
Technical Field
The invention belongs to the technical field of mine gas prevention and control, and particularly relates to a pressure measuring and hole sealing device and method for a traction capsule of a self-propelled guide drill bit for ultra-long drilling.
Background
In coal mine safety mining, coal mine gas outburst accidents are disaster accidents which cause the greatest casualties at present, and the control of gas rich in coal beds is very important. The gas content of the coal bed and the potential of the gas dynamic phenomenon are determined by the gas pressure of the coal bed, so that the accurate measurement of the gas pressure of the coal bed is the basis of the mine gas control work. At present, the method for measuring the gas pressure of the coal bed is roughly three steps, namely punching, hole sealing and pressure measuring. Most of the existing hole sealing pressure measuring technologies are that after a mechanical drilling machine withdraws a drill rod, the mechanical drilling machine sends a hole sealing pressure measuring device to a pressure measuring point for hole sealing pressure measurement, for example, the invention patent with the publication number of CN112343659A, the invention name of the invention is 'a coal bed gas pressure measuring method for coal bed directional cross-layer drilling hole', the publication number of CN113818921A, the invention name of 'a device and method for shortening coal bed gas pressure measuring observation time', is a method for sending the hole sealing pressure measuring device to the pressure measuring point by adopting the mechanical drilling machine, and along with the development of science and technology, the directional kilometer drilling machine is gradually popularized, and the length of a directional long drilling hole for coal bed pressure measurement is gradually increased. Along with the increase of the length of the drill hole and the influence of the geological structure of the coal bed, the long-distance drill hole has certain angle change. The method for placing the hole sealing pressure measuring device by using the mechanical drilling machine has the advantages that the problems of blockage and difficulty in advancing are easily caused when the drill rod reaches the inclined angle of the drill hole, and the pressure measuring point is difficult to reach. Therefore, in the gas pressure measurement of the long-distance directional long drill hole, how to place the hole sealing pressure measurement device at a pressure measurement point becomes the key of the gas pressure measurement.
Disclosure of Invention
The invention aims to provide a self-propelled guide drill traction capsule hole sealing pressure measuring device and a method capable of measuring the pressure of gas in an ultra-long distance.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides an overlength drilling is from advancing formula guide bit and is dragged capsule pressure measurement hole sealing device, includes and drives traction system, hole sealing subassembly and pressure measurement subassembly certainly, it includes from advancing formula guide bit and water supply unit to drive traction system certainly, water supply unit includes high-pressure pump station and high-pressure rubber tube, and high-pressure rubber tube end-to-end connection has from advancing formula guide bit, hole sealing subassembly is including the stay tube that the cover was located the rubber tube outside and pasting the hole sealing capsule on the stay tube, be equipped with the water injection hole on the hole sealing capsule, the water injection hole passes through the water tank UNICOM of high-pressure thin hose and hand pump from the area, pressure measurement subassembly includes the pressure measurement thin hose, is located the terminal nitrogen cylinder of pressure measurement thin hose and sets up the manometer on the pressure measurement thin hose, pressure measurement thin hose front end stretches out the hole sealing capsule and extends to the drilling front end forward, and in the device solved present overlength directional drilling gas, influenced by drilling angle mechanical drill rod and take place the card dun's, Difficult to advance, make the pressure measuring device difficult to reach the problem of pressure measuring point.
Furthermore, the pressure measuring thin hose is positioned in a gap between the outer wall of the rubber tube and the supporting tube, and the front end of the pressure measuring thin hose is fixed between the boss and the clamping table through the clamping spring, so that the design is convenient for the self-advancing type guide drill to drag the capsule and the pressure measuring thin hose through the high-pressure rubber tube.
Further, self-advancing pilot bit includes the casing and is located the cavity of casing, the casing is including the installation department that is located the spherical head and the rear end of front end, through threaded connection between spherical head and the installation department, and the installation department rear portion passes through threaded connection with the high-pressure rubber tube, the screw hole of two symmetries about spherical head rear portion is equipped with, and threaded hole is equipped with the nozzle, and the nozzle becomes 20 contained angles with spherical head axis horizontal direction, the inside cavity of spherical head, installation department center cavity are linked together with the high-pressure rubber tube, consider that long drilling has the angle problem, and spherical structure can make the drill bit more level and smooth through drilling turning, and rear side nozzle efflux can provide efflux recoil force, promotes the self-advancing pilot bit and gos forward.
Further, the hole sealing capsule is at least two, sets up and communicates each other through the thin hose of high pressure between the adjacent hole sealing capsule at a plurality of hole sealing capsule intervals, prop pipe quantity the same with hole sealing capsule quantity, the high-pressure hose both ends at hole sealing capsule place all are equipped with a boss, every props the pipe tip and all is equipped with the ka tai of mutually supporting with the boss, props the pipe and is located the boss and with boss and ka tai fixed connection through the jump ring, prop setting up of pipe conveniently fix the capsule with carry capsule to appointed position and be difficult to by the wearing and tearing of drilling wall.
Furthermore, the center of the supporting tube is provided with a sunken accommodating cavity, and the hole sealing capsules are positioned in the sunken accommodating cavity.
Further, the high-pressure rubber hose plate is arranged on the reel, and the high-pressure pump station is connected with the high-pressure rubber hose through the adapter.
A pressure measuring method of a super-long drilling self-advancing type guide drill traction capsule pressure measuring and hole sealing device comprises the following steps:
(1) connecting kilometer drilling machines, carrying out ultra-long distance pressure measurement drilling construction in a coal rock layer, withdrawing a drill rod after the drilling construction is finished, and moving away a mechanical drilling machine;
(2) sequentially connecting a high-pressure pump station, a high-pressure rubber pipe, a hole sealing assembly, a pressure measuring assembly and a self-advancing guide drill bit, checking the water level condition of a circuit and the pump station, opening a reel of the high-pressure rubber pipe, putting the self-advancing guide drill bit and a hole sealing capsule into a hole, and opening a high-pressure water pump;
(3) the self-propelled guide drill drags the capsule and the pressure measuring thin hose to continuously advance through the high-pressure rubber tube until reaching a pressure measuring point;
(4) closing the high-pressure water pump, opening the hand pump to pressurize the capsule to 5MPa, expanding the capsule, and maintaining for a period of time to complete hole sealing;
(5) in order to accelerate the rise of the gas pressure and shorten the pressure measuring time, 1-2 MPa nitrogen is supplemented to a pressure measuring point through a nitrogen bottle, then a bottle opening switch of the nitrogen bottle is closed to stop supplying the gas, the pressure measuring indication number is read, and the gas pressure is observed and recorded regularly until the indication number is stable;
(6) and after the pressure measurement is finished, the hand pump is taken down, the water in the capsule and the high-pressure thin hose is released, after the capsule is completely contracted, the high-pressure rubber tube reel is started, and the high-pressure rubber tube, the hole sealing assembly and the self-advancing guide drill bit are withdrawn.
Working principle and energy balance: the self-advancing guide drill bit, the high-pressure rubber tube, the capsule, the high-pressure thin hose, the hand pump, the pressure measuring thin hose, the pressure measuring meter, the nitrogen cylinder, the high-pressure rubber tube reel and the high-pressure pump station are sequentially connected. When the system starts to operate, the high-pressure jet flow formed at the nozzle of the self-advancing drill bit provides recoil force to push the self-advancing guide drill bit to advance, so that the high-pressure rubber pipe, the hole sealing assembly and the pressure measuring assembly are driven to advance, when the self-advancing guide drill bit reaches a drill hole turning part, the spherical structure of the head of the drill bit can smoothly wipe the turning part, then the hole sealing assembly and the pressure measuring assembly are pulled to pass through the drill hole turning part through the high-pressure rubber pipe until reaching a pressure measuring point, and the subsequent pressure measurement is completed.
The formula of the recoil force of the high-pressure jet flow is as follows:
in the formula: f is jet recoil force, N; n is the number of nozzles; d is the diameter of the nozzle, mm; p is jet pressure, alpha is the included angle between the nozzle and the drill bit axis, and degree.
The self-propelled guide drill bit needs to overcome the frictional resistance of the wall of the drill hole of the self-driving traction capsule pressure measuring system when advancing in the drill hole, and the relational expression of jet recoil force and pressure measuring depth is as follows:
in the formula: k is the comprehensive friction resistance coefficient of unit length, N/m; x is the depth of the pressure measuring point, m; m is the total mass of the self-advancing type guide drill and the capsule, kg; the mass of the high-pressure hose per unit length filled with water is kg/m.
The comprehensive friction resistance coefficient of unit length is related to coal and rock stratum conditions, and the k values of different coal and rock stratum conditions are different. The comprehensive friction resistance coefficient is 6N/M, M is 52kg, 1kg/M is taken as an example to calculate jet pressure required by the pressure measuring depth of 300M, jet recoil force required under the condition is 629N obtained by the formula (2), and under the jet pressure of 30MPa (limited by underground coal bed conditions and pumping station conditions, generally 30 MPa), 2 nozzles with the diameter of 2mm and 2 nozzles with the diameter of 1mm are required to be arranged on the self-propelled guide drill bit according to the formula (1). According to the flow formula:
the required flow rate q under these conditions was found to be 115L/min.
The arrangement mode of the self-propelled guide drill bit nozzle in the self-driving traction capsule pressure measuring device can be designed according to the formulas (1), (2) and (3) under the condition of the underground coal seam.
The invention has the advantages that:
1. the invention aims at solving the problem that the mechanical drilling machine is blocked and difficult to advance when a hole sealing pressure measuring device is placed in the current overlong directional drilling gas pressure measuring method due to the change of a drilling angle, the overlong drilling self-driving traction capsule pressure measuring method is used for carrying out overlong drilling gas pressure measurement in a mode that a traction hole sealing component and a pressure measuring component enter a pressure measuring point by taking high-pressure water jet recoil as power, a threaded hole is formed in the rear part of a self-advancing guide drill bit and used for installing a nozzle to form high-pressure jet flow to provide recoil force, the front part of the self-advancing guide drill bit is of a spherical structure and can smoothly pass through a drilling turning part, a capsule is connected through a high-pressure hose, the high-pressure hose is softer and can be bent compared with a drill rod, the self-advancing guide drill bit can smoothly reach the pressure measuring point by traction, the hole sealing pressure measurement can be smoothly carried out, the high-pressure water conservancy is used for driving, the environment friendliness and no pollution are realized, and the friction resistance coefficients of different coal seams are different, the self-propelled pilot bit suitable for different coal seams can be designed according to the formulas (1), (2) and (3), namely the self-propelled pilot bit can be suitable for measuring gas pressure under different coal seams;
2. the invention can effectively drag the hole sealing component and the pressure measuring component to the pressure measuring point, thereby completing the gas pressure measurement, avoiding the problems of unsmooth and difficult proceeding when a mechanical drill rod is used for placing the hole sealing pressure measuring device, having simple construction and simple and convenient operation, providing a convenient and safe operation environment for constructors, accelerating the construction efficiency and saving the time, and in addition, the high-pressure water pump can select the existing water pump in the pit and can select the type of the drill bit according to the existing water pump.
Drawings
Fig. 1 is a schematic structural diagram of the ultra-long drilling self-driving traction capsule pressure measuring device.
FIG. 2 is a schematic view showing the connection structure of the capsule, the pressure measuring fine hose, the high-pressure hose and the high-pressure fine hose according to the present invention.
FIG. 3 is a schematic diagram of the construction of the self-advancing pilot bit of the present invention.
Detailed Description
In the invention, the azimuth words of the front end, the rear end and the like are defined by taking the advancing direction of the drill bit as the front end.
As shown in the figure, a overlength drilling is from advancing formula direction drill bit and is towed capsule pressure measurement hole sealing device, including driving system, hole sealing subassembly and the pressure measurement subassembly certainly, driving system certainly includes advancing formula direction drill bit 1 and water supply unit, water supply unit includes high-pressure pumping station 2 and high-pressure rubber tube 3, high-pressure rubber tube 3 coils is located on the reel, and high-pressure pumping station passes through the adapter with the high-pressure rubber tube and is connected, and 3 end-to-end connections of high-pressure rubber tube have advancing formula direction drill bit 1 certainly, advancing formula direction drill bit 1 certainly includes casing 101 and the cavity 102 that is located the casing, the casing includes the installation department 1012 at the bulb 1011 of the front end and rear end, passes through threaded connection between bulb and the installation department, and the installation department rear portion passes through threaded connection with high-pressure rubber tube 3, two symmetrical screw holes 1013 about the bulb rear portion is equipped with, and threaded hole is equipped with the nozzle, and the nozzle becomes 20 contained angles with bulb axis horizontal direction, the inner cavity of the spherical head and the central cavity of the mounting part are communicated with the high-pressure rubber pipe, and the spherical structure can enable the drill bit to pass through a drill hole turning part more smoothly in consideration of the angle problem of a long drill hole, and jet flow of the rear side nozzle can provide jet flow recoil force to push the self-propelled guide drill bit to advance; the hole sealing component comprises a supporting pipe 4 sleeved outside the rubber pipe and hole sealing capsules 5 pasted on the supporting pipe, wherein the hole sealing capsules 5 are provided with water injection holes, the water injection holes are communicated with a water tank of a hand pump 7 through high-pressure fine hoses 6, the number of the hole sealing capsules 5 is at least two, a plurality of hole sealing capsules are arranged at intervals, adjacent hole sealing capsules are communicated with each other through the high-pressure fine hoses 6, the number of the supporting pipes 4 is the same as that of the hole sealing capsules 5, bosses 11 are arranged at two ends of the high-pressure rubber pipe where the hole sealing capsules are located, clamping platforms 12 matched with the bosses are arranged at the end parts of each supporting pipe 4, the supporting pipes are located in the bosses 11 and fixedly connected with the clamping platforms through clamping springs 13, a concave containing cavity is arranged at the center of the supporting pipes, the hole sealing capsules are located in the concave containing cavity, and the supporting pipes are convenient to fix the capsules and carry the capsules to an appointed position and are not easy to be abraded by a drilling wall, the pressure measuring component comprises a pressure measuring thin hose 8, a nitrogen cylinder 9 positioned at the tail end of the pressure measuring thin hose and a pressure gauge 10 arranged on the pressure measuring thin hose, wherein the front end of the pressure measuring thin hose 8 extends out of a hole sealing capsule 5 and extends forwards to the front end of a drill hole, the pressure measuring thin hose 8 is positioned in a gap between the outer wall of a rubber tube 3 and a supporting tube 4, and the front end of the pressure measuring thin hose is fixed between a boss and a clamping table through a clamping spring, so that the pressure measuring thin hose is designed to be convenient for advancing in the process of solving the current overlong directional drilling gas pressure measuring by the device, and the mechanical drill rod is affected by the drilling angle to clamp and pause and be difficult to advance, so that the pressure measuring device is difficult to reach the pressure measuring point.
A pressure measuring method of a super-long drilling self-advancing type guide drill traction capsule pressure measuring and hole sealing device comprises the following steps:
(1) connecting kilometer drilling machines, carrying out ultra-long distance pressure measurement drilling construction in a coal rock layer, withdrawing a drill rod after the drilling construction is finished, and moving away a mechanical drilling machine;
(2) sequentially connecting a high-pressure pump station, a high-pressure rubber pipe, a hole sealing assembly, a pressure measuring assembly and a self-advancing guide drill bit, checking the water level condition of a circuit and the pump station, opening a reel of the high-pressure rubber pipe, putting the self-advancing guide drill bit and a hole sealing capsule into a hole, and opening a high-pressure water pump;
(3) the self-propelled guide drill drags the capsule and the pressure measuring thin hose to continuously advance through the high-pressure rubber tube until reaching a pressure measuring point;
(4) closing the high-pressure water pump, opening the hand pump to pressurize the capsule to 5MPa, expanding the capsule, and maintaining for a period of time to complete hole sealing;
(5) in order to accelerate the rise of the gas pressure and shorten the pressure measuring time, 1-2 MPa nitrogen is supplemented to a pressure measuring point through a nitrogen bottle, then a bottle opening switch of the nitrogen bottle is closed to stop supplying the gas, the pressure measuring indication number is read, and the gas pressure is observed and recorded regularly until the indication number is stable;
(6) and after the pressure measurement is finished, the hand pump is taken down, the water in the capsule and the high-pressure thin hose is released, after the capsule is completely contracted, the high-pressure rubber tube reel is started, and the high-pressure rubber tube, the hole sealing assembly and the self-advancing guide drill bit are withdrawn.
The invention takes the water jet recoil force as the power, and the ultra-long drilling gas pressure measurement is carried out in a mode that the hole sealing device and the pressure measuring device are dragged to enter a pressure measuring point. By adopting the invention, the hole sealing device and the pressure measuring device can be effectively dragged to the pressure measuring point, thereby completing the measurement of the gas pressure and avoiding the problems of blockage and difficulty in moving when the hole sealing pressure measuring device is placed by a mechanical drill rod. The construction is simple, the operation is simple and convenient, a convenient and safe operation environment can be provided for constructors, the construction efficiency is accelerated, and the time is saved. In addition, the high-pressure water pump can select the existing water pump in the well, and the type of the drill bit can be selected according to the existing water pump. The friction resistance coefficients of different coal strata are different, and the self-advancing type guide drill bit suitable for different coal strata can be designed according to the formulas (1), (2) and (3), namely the self-advancing type guide drill bit can be suitable for measuring the gas pressure under different coal strata.
Claims (7)
1. The utility model provides a overlength drilling self-advancing formula pilot bit tows capsule pressure measurement hole sealing device which characterized in that: including self-driving traction system, hole sealing subassembly and pressure measurement subassembly, self-driving traction system includes from advancing formula direction drill bit and water supply unit, water supply unit includes high-pressure pumping station and high-pressure rubber tube, and high-pressure rubber tube end-to-end connection has self-advancing formula direction drill bit, the hole sealing subassembly is located the stay tube outside the rubber tube and is pasted the hole sealing capsule on the stay tube including the cover, be equipped with the water injection hole on the hole sealing capsule, the water injection hole is through the water tank UNICOM of high-pressure fine hose and hand pump from the area, pressure measurement subassembly includes the pressure measurement fine hose, is located the terminal nitrogen cylinder of pressure measurement fine hose and sets up the manometer on the pressure measurement fine hose, the pressure measurement fine hose front end stretches out the hole sealing capsule and extends to the drilling front end forward.
2. The overlong drilling self-advancing guide drill traction capsule pressure measuring and sealing device according to claim 1, characterized in that: the pressure measuring thin hose is positioned in a gap between the outer wall of the rubber tube and the stay tube.
3. The overlong drilling self-advancing guide drill traction capsule pressure measuring and sealing device according to claim 2, characterized in that: the self-advancing guide drill bit comprises a shell and a cavity positioned in the shell, wherein the shell comprises a spherical head positioned at the front end and an installation part positioned at the rear end, the spherical head and the installation part are connected through threads, the rear part of the installation part is connected with a high-pressure rubber pipe through threads, the rear part of the spherical head is provided with two symmetrical threaded holes, a nozzle is arranged in each threaded hole, the nozzle and the axis horizontal direction of the spherical head form a 20-degree included angle, and the cavity inside the spherical head, the central cavity of the installation part and the high-pressure rubber pipe are communicated.
4. The overlong drilling self-advancing guide drill traction capsule pressure measuring and sealing device according to claim 3, characterized in that: the hole sealing capsules are at least two, a plurality of hole sealing capsules are arranged at intervals, adjacent hole sealing capsules are communicated with one another through high-pressure thin hoses, the quantity of the supporting pipes is the same as that of the hole sealing capsules, bosses are arranged at two ends of a high-pressure rubber pipe where the hole sealing capsules are located, clamping platforms matched with the bosses are arranged at the end portions of the supporting pipes, and the supporting pipes are located in the bosses and fixedly connected with the clamping platforms through clamp springs.
5. The self-propelled pilot drill traction capsule pressure measuring and sealing device for the ultra-long drill hole according to claim 4, characterized in that: the center of the supporting tube is provided with a sunken accommodating cavity, and the hole sealing capsules are positioned in the sunken accommodating cavity.
6. The overlong drilling self-advancing guide drill traction capsule pressure measuring and sealing device according to claim 5, characterized in that: the high-pressure rubber hose coil is arranged on the reel, and the high-pressure pump station is connected with the high-pressure rubber hose through the adapter.
7. The pressure measuring method of the pressure measuring and sealing device for the ultra-long drill self-propelled guide drill traction capsule according to any one of claims 1 to 6, which is characterized by comprising the following steps:
(1) connecting kilometer drilling machines, carrying out ultra-long distance pressure measurement drilling construction in a coal rock layer, withdrawing a drill rod after the drilling construction is finished, and moving away a mechanical drilling machine;
(2) sequentially connecting a high-pressure pump station, a high-pressure rubber pipe, a hole sealing assembly, a pressure measuring assembly and a self-advancing guide drill bit, checking the water level condition of a circuit and the pump station, opening a reel of the high-pressure rubber pipe, putting the self-advancing guide drill bit and a hole sealing capsule into a hole, and opening a high-pressure water pump;
(3) the self-propelled guide drill drags the capsule and the pressure measuring thin hose to continuously advance through the high-pressure rubber tube until reaching a pressure measuring point;
(4) closing the high-pressure water pump, opening the hand pump to pressurize the capsule to 5MPa, expanding the capsule, and maintaining for a period of time to complete hole sealing;
(5) in order to accelerate the rise of the gas pressure and shorten the pressure measuring time, 1-2 MPa nitrogen is supplemented to a pressure measuring point through a nitrogen bottle, then a bottle opening switch of the nitrogen bottle is closed to stop supplying the gas, the pressure measuring indication number is read, and the gas pressure is observed and recorded regularly until the indication number is stable;
(6) and after the pressure measurement is finished, the hand pump is taken down, the water in the capsule and the high-pressure thin hose is released, after the capsule is completely contracted, the high-pressure rubber tube reel is started, and the high-pressure rubber tube, the hole sealing assembly and the self-advancing guide drill bit are withdrawn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210452332.8A CN114856546A (en) | 2022-04-24 | 2022-04-24 | Ultra-long drilling self-advancing type guide drill traction capsule pressure measuring and hole sealing device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210452332.8A CN114856546A (en) | 2022-04-24 | 2022-04-24 | Ultra-long drilling self-advancing type guide drill traction capsule pressure measuring and hole sealing device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114856546A true CN114856546A (en) | 2022-08-05 |
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| CN202210452332.8A Pending CN114856546A (en) | 2022-04-24 | 2022-04-24 | Ultra-long drilling self-advancing type guide drill traction capsule pressure measuring and hole sealing device and method |
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