CN114607347A - Coal mine underground near-bit multi-parameter measurement while drilling system based on hollow screw drilling tool - Google Patents
Coal mine underground near-bit multi-parameter measurement while drilling system based on hollow screw drilling tool Download PDFInfo
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- CN114607347A CN114607347A CN202210297337.8A CN202210297337A CN114607347A CN 114607347 A CN114607347 A CN 114607347A CN 202210297337 A CN202210297337 A CN 202210297337A CN 114607347 A CN114607347 A CN 114607347A
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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
- E21B44/00—Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
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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
- E21B17/02—Couplings; joints
- E21B17/028—Electrical or electro-magnetic connections
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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
- E21B17/02—Couplings; joints
- E21B17/03—Couplings; joints between drilling rod or pipe and drill motor or surface drive, e.g. between drilling rod and hammer
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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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/02—Fluid rotary type drives
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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
- E21B47/02—Determining slope or direction
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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
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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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
Abstract
The invention discloses a coal mine underground near-bit multi-parameter measurement while drilling system based on a hollow screw drilling tool. In the directional drilling process, the near-bit measuring instrument measures drilling track parameters, coal measure stratum geological parameters and drilling engineering parameters at a bit in real time, transmits the drilling track parameters, the coal measure stratum geological parameters and the drilling engineering parameters to the upper measurement-while-drilling system in a wired transmission mode, and transmits the drilling track parameters, the coal measure stratum geological parameters and the drilling engineering parameters to an orifice by the upper measurement-while-drilling system. The near-bit multi-parameter measurement-while-drilling system has the remarkable advantages of high structural reliability, rapid and stable signal transmission, short instrument size, small influence on deflecting capacity of a screw drill, multiple parameter measurement types and the like, provides a basis for accurate control of drilling tracks, recognition of drilling working conditions and parameter optimization, and supports realization of intelligent directional drilling under a coal mine.
Description
Technical Field
The invention belongs to the field of underground coal mine gallery drilling, and particularly relates to an underground coal mine near-bit multi-parameter measurement while drilling system based on a hollow screw drilling tool.
Background
The measurement while drilling system is mainly used for measuring drilling track parameters, formation physical property parameters and the like and guiding directional drilling track control, and is the core of directional drilling technical equipment. At present, a mine wired transmission type, slurry pulse transmission type and electromagnetic wave transmission type measurement-while-drilling system is developed under a coal mine, but the measurement-while-drilling systems are connected behind a screw drilling tool, the distance between the measurement-while-drilling system and a hole bottom drill bit is not less than 6m, the parameter measurement has hysteresis, the real drilling condition of the hole bottom cannot be mastered, and the drilling track control and the drilling parameter adjustment are delayed.
In order to meet the requirements of high-precision, safe and quick construction of directional drilling, a near-bit measurement-while-drilling system is developed in the field of ground oil and gas drilling, a measuring instrument is arranged between a drill bit and a screw drill tool, and the measurement-while-drilling information near the drill bit can be measured; the method adopts two modes of wireless short transmission and thread-passing transmission of the screw drilling tool, and the near-bit measurement data is transmitted to the upper conventional measurement-while-drilling system by crossing the screw drilling tool and is transmitted to the orifice by the upper conventional measurement-while-drilling system, so that the problem of measurement hysteresis is solved, and the timeliness of drilling control is improved. The wireless short transmission mainly takes sound waves or electromagnetic waves as a medium, and the near-bit information is transmitted to an upper conventional measurement while drilling system by crossing the screw drilling tool in a wireless mode; the wire passing transmission of the screw drilling tool mainly adopts the mode that cables are arranged on the side wall or inside the screw drilling tool, a plurality of groups of slip rings are arranged at each connecting joint of the screw drilling tool, and the information of a near drill bit is transmitted to an upper conventional measurement while drilling system by utilizing a wired channel formed by the screw drilling tool.
The near-bit measurement while drilling system developed in the field of ground oil and gas drilling cannot be used underground in a coal mine under the special explosion-proof requirement of the underground coal mine, and the following problems exist in the practical application of the ground oil and gas drilling:
(1) the structure is complex and the reliability is low. The line passing transmission mode of the screw drill needs to process deep holes on the side wall or inside the screw drill to arrange cables, so that the structure is complex and the processing difficulty is high; meanwhile, the screw drill consists of a plurality of parts, the joints of the parts are required to be provided with male and female slip rings to realize signal transmission through the joint, and the slip ring sealing structure is easy to damage and lose efficacy under the complex stress condition in the hole and cannot transmit signals through the joint.
(2) The signal transmission stability is poor. The wireless short transmission mode adopts sound wave or electromagnetic wave wireless medium to transmit near-bit measurement signals, the signal transmission channel is an annular space between the screw drilling tool and the hole wall, the wireless signals are greatly interfered by properties of flushing fluid and vibration of the drilling tool, the signal transmission stability is poor, the signal transmission speed is slow, and large-capacity data transmission cannot be met.
(3) The short section is too long when the near drill bit is used for measuring, and the build slope of the screw drilling tool is reduced. The existing near-bit measurement-while-drilling system installs parameter measurement, power supply and screw drill transmission modules at the near-bit position, increases the length from the bending point of the screw drill to the drill, and reduces the build slope of the screw drill.
(4) The type of the collected data is single, and the optimization decision of the support drilling is not enough. The existing near-bit measurement while drilling system mainly collects near-bit track parameters and stratum natural gamma parameters, the detection distance of the natural gamma is less than 0.5m, the detection distance is short, the stratum identification precision is low under the support of a single parameter, the existing near-bit measurement while drilling system does not have the function of monitoring drilling engineering parameters, the improvement effect on the control of the drilling track is limited, and the optimization of the drilling parameters lacks data support.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a coal mine underground near-bit multi-parameter measurement while drilling system based on a hollow screw drilling tool, and solves the problems of complex structure, low reliability, poor signal transmission stability, reduction in the build slope of the screw drilling tool caused by overlong short section length of the near-bit, single type of collected data and the like of the conventional near-bit measurement while drilling system.
In order to solve the technical problems, the invention adopts the following technical scheme:
the coal mine underground near-bit multi-parameter measurement while drilling system based on the hollow screw drilling tool comprises the hollow screw drilling tool and a near-bit measuring instrument;
the hollow screw drill comprises a hollow motor assembly, a hollow cardan shaft assembly and a hollow transmission shaft assembly which are sequentially connected, wherein central through holes of the hollow motor assembly, the hollow cardan shaft assembly and the hollow transmission shaft assembly are communicated with each other to form a central through hole of the hollow screw drill for mounting a near-bit measuring instrument;
the near-bit measuring instrument comprises a conversion short section, a power supply short section, a universal shaft passing short section and a near-bit measuring short section which are sequentially connected; one end of a near-bit measuring short joint is positioned in the hollow transmission shaft assembly, the other end of the near-bit measuring short joint is arranged at the end part of the hollow transmission shaft assembly, and the near-bit measuring short joint is used for measuring drilling track parameters (inclination angle), coal-series stratum geological parameters (azimuth gamma and resistivity) and drilling engineering parameters (bit pressure, torque, rotating speed and vibration) at the near-bit position; the through universal shaft nipple is positioned in the hollow universal shaft assembly, a communication cable is arranged in the through universal shaft nipple to connect the near drill bit measuring nipple and the power supply nipple, and the through universal shaft nipple is of a flexible structure to adapt to deformation generated by the rotation of the planetary motion unsteady shaft in the hollow universal shaft assembly; the power supply short section is positioned in the hollow motor assembly and is provided with a rechargeable nickel-hydrogen battery pack to provide electric energy for the near-bit measuring short section; the conversion nipple joint is arranged at the end part of the hollow motor assembly and used for converting the hollow rotor planetary motion indefinite axis rotation of the hollow motor assembly into coaxial rotation, and meanwhile, the conversion nipple joint is connected with an upper measuring system in a wired mode so as to transmit data measured by the near-bit multi-parameter measurement-while-drilling system to the upper measuring system and transmit the data to an orifice in real time by the upper measuring system.
The invention also comprises the following technical characteristics:
specifically, the hollow motor assembly comprises a hollow motor assembly shell, a stator and a hollow rotor which are coaxially sleeved from outside to inside in sequence; the hollow cardan shaft assembly comprises a hollow cardan shaft assembly shell and a hollow cardan shaft in the hollow cardan shaft assembly shell; the hollow transmission shaft assembly comprises a hollow transmission shaft assembly shell, a hollow transmission shaft, a rolling bearing and a TC bearing, wherein the rolling bearing and the TC bearing are arranged between the hollow transmission shaft assembly shell and the hollow transmission shaft;
the hollow motor assembly shell, the hollow cardan shaft assembly shell and the hollow transmission shaft assembly shell are sequentially connected; the hollow rotor, the hollow cardan shaft and the hollow transmission shaft are sequentially connected, and central through holes of the hollow rotor, the hollow cardan shaft and the hollow transmission shaft are mutually communicated to form a central through hole of the hollow screw drilling tool.
Specifically, the near-bit measuring nipple comprises a center-rotation side wall shell and a near-bit shell which are connected through threads; the central rotating side wall shell is positioned in a central through hole of the hollow transmission shaft, and the near drill bit shell is in threaded connection with the hollow transmission shaft;
a drilling engineering parameter measuring module, a drilling track parameter measuring module, a resistivity measuring module and an azimuth gamma measuring module are arranged in the side wall of the near-bit shell; a signal processing and transmitting module is arranged in the central rotating side wall shell;
the side walls of the central rotating side wall shell and the near bit shell are provided with wire passing holes, side wall rotating center cables are arranged in the wire passing holes, one end of each side wall rotating center cable is connected with the engineering parameter measuring module, the drilling track parameter measuring module, the resistivity measuring module and the azimuth gamma measuring module, and the other end of each side wall rotating center cable is connected with the signal processing and transmitting module to form a near bit measuring nipple power supply and signal transmission channel;
the near drill bit shell is provided with a water passing channel, so that flushing liquid enters the central through hole of the near drill bit shell.
Specifically, the conversion short section comprises a conversion short section shell, and one end of the conversion short section shell is in threaded connection with the hollow motor assembly shell;
a communication joint, an installation joint, a conversion joint, an upper sliding ring, a reversing connecting rod, a lower sliding ring and a sealing plug are sequentially arranged in the conversion nipple shell; the end part and the inside of the mounting joint are formed into injection molding parts in an injection molding mode so as to mount the communication joint; three mounting blocks are uniformly distributed on the outer wall of the mounting joint in the circumferential direction; a fixing ring is further arranged in an annular gap between the mounting joint and the conversion short section shell, three mounting holes are uniformly distributed in the circumferential direction of the fixing ring and correspond to the three mounting blocks, and fixing bolts penetrate through the mounting holes and are connected with the mounting blocks so as to connect the fixing ring and the mounting joint together; the fixing ring is in threaded connection with the inner wall of the conversion nipple shell to realize axial and circumferential fixing of the installation joint;
the reversing connecting rod rotates along with the power supply short section, and the planetary motion indefinite axis rotation of the lower sliding ring is converted into the coaxial rotation of the upper sliding ring; a flexible cable is arranged in the center of the reversing connecting rod, and two ends of the flexible cable are respectively connected with the upper sliding ring and the lower sliding ring; the lower sliding ring is connected with a sealing plug which is connected with a power supply short joint.
Specifically, a central cable, a lower sliding ring, a flexible cable, an upper sliding ring and a conversion joint in the sealing plug are sequentially connected with a central cable and a communication joint in the installation joint to form a wired signal transmission channel of the near-bit measuring instrument and the upper measuring system.
Specifically, when the hollow rotor, the hollow cardan shaft and the hollow transmission shaft rotate, the near drill bit measuring short section, the universal shaft passing short section, the power supply short section and the sealing plug, the lower sliding ring and the reversing connecting rod in the conversion short section are driven to rotate together.
The coal mine underground near-bit multi-parameter measurement while drilling method based on the hollow screw drilling tool is realized by the coal mine underground near-bit multi-parameter measurement while drilling system based on the hollow screw drilling tool, and comprises the following steps:
the method comprises the following steps: connecting an instrument: a drilling tool assembly which mainly comprises a near-bit multi-parameter measurement-while-drilling system is put into the drill hole, and the drill bit, the near-bit multi-parameter measurement-while-drilling system, an upper measurement system, a plurality of central cable-passing drill rods and a water feeder are arranged from the bottom of the hole to the orifice in sequence;
step two: directional drilling: adjusting the tool face angle of the hollow screw drilling tool to a preset angle, feeding a high-pressure flushing fluid into the hollow screw drilling tool by using a slurry pump, converting pressure energy into kinetic energy after the high-pressure flushing fluid flows through a gap between a hollow rotor and a stator, driving the hollow rotor to rotate, driving a hollow universal shaft and a hollow transmission shaft to rotate, driving a power supply short section, a cross universal shaft short section and a near drill bit measuring short section to rotate together, and driving a drill bit to rotate and crush rock;
step three: near-bit information dynamic measurement while drilling: in the directional drilling process, a near-bit measuring instrument measures drilling track parameters (inclination angle), coal-based stratum geological parameters (azimuth gamma, resistivity) and drilling engineering parameters (bit pressure, torque, rotating speed and vibration) at a near-bit position, the measured data are transmitted to an upper measuring system in a wired mode through a conversion short section, the upper measuring system carries out noise reduction processing on a near-bit signal and then transmits the signal to an orifice, and an orifice device receives, processes and displays near-bit information;
step four: optimizing and adjusting a drilling scheme: after receiving drilling track parameters (inclination angle) at a near-bit position, coal-based stratum geological parameters (azimuth gamma and resistivity) and drilling engineering parameters (bit pressure, torque, rotating speed and vibration) measured by a near-bit measuring instrument, the orifice device identifies the stratum while drilling and judges the drilling working condition, optimizes the drilling design track and adjusts the drilling track to construct along a target stratum; meanwhile, drilling parameters such as pump pressure, pump capacity, drilling pressure, drilling speed and the like are adjusted, and efficient drilling is carried out on the basis of ensuring safety;
step five: final hole withdrawal: and repeating the second step, the third step and the fourth step until the design depth is reached, completing the directional drilling construction, and withdrawing the instruments and drilling tools in the hole.
The invention has the following technical effects:
(1) the structure is easy to realize, and the system reliability is enhanced. The near-bit multi-parameter measurement while drilling system provided by the invention utilizes the central through hole formed by the hollow rotor, the hollow cardan shaft and the hollow transmission shaft in the hollow screw drilling tool, and near-bit measuring instruments are arranged in the hollow screw drilling tool and at two ends of the hollow screw drilling tool.
(2) Near-bit signals are transmitted in a wired mode, and the signal transmission speed and stability are improved. The near-bit multi-parameter measurement-while-drilling system disclosed by the invention adopts a wired channel in the near-bit measurement instrument to realize near-bit information transmission through a screw drill tool, and transmits near-bit data to an upper conventional measurement-while-drilling system in a wired mode through the conversion short section, and all signal transmission paths are in a wired mode, so that the signal transmission speed is high, and the stability is obviously improved.
(3) The short section of the near drill bit is shortened, and the influence on the build slope of the screw drilling tool is reduced. According to the near-bit multi-parameter measurement-while-drilling system, the power supply short section and the signal processing and transmitting module are arranged in the hollow screw drilling tool, and only the near-bit measuring module is arranged in the side wall of the near-bit measuring short section, so that the length of the near-bit measuring short section is shortened, the distance from a bending point of the screw drilling tool to the drill bit is reduced, and the influence on the build-up rate of the screw drilling tool is reduced.
(4) The variety of the collected parameters is multiple, and a decision basis is provided for the directional drilling optimization control. The near-bit multi-parameter measurement while drilling system can collect drilling track parameters and formation orientation natural gamma parameters, can measure formation resistivity parameters, has a formation detection distance of more than 2m, combines orientation natural gamma and resistivity, improves formation identification precision, and provides a basis for accurate control of drilling tracks; in addition, drilling engineering parameters can be measured, the drilling working condition of the hole bottom can be judged while drilling, a basis is provided for drilling parameter optimization and in-hole accident prevention, and intelligent directional drilling is supported.
Drawings
FIG. 1 is a structure diagram of a coal mine underground near-bit multi-parameter measurement while drilling system based on a hollow screw drilling tool.
FIG. 2 is a cross-sectional view of a near-bit multi-parameter measurement while drilling system for an underground coal mine based on a hollow screw drill.
Fig. 3 is a structural view of a hollow screw drill.
FIG. 4 is a diagram of a near-bit surveying instrument.
FIG. 5 is a diagram of a short gauge section of a near bit.
FIG. 6 is a structure diagram of a conversion short section.
Fig. 7 is a schematic view of the mounting joint structure in the conversion nipple.
The meaning of the individual reference symbols in the figures is:
1. the method comprises the following steps of (1) drilling a hollow screw rod, 2. a near-bit measuring instrument, 11. a hollow motor assembly, 12. a hollow cardan shaft assembly, 13. a hollow transmission shaft assembly, 21. a conversion short section, 22. a power supply short section, 23. a universal shaft passing short section, and 24. a near-bit measuring short section; 111. a hollow motor assembly shell, 112, a stator, 113, a hollow rotor, 121, a hollow cardan shaft assembly shell, 122, a hollow cardan shaft, 131, a hollow transmission shaft assembly shell, 132, a hollow transmission shaft, 133, a rolling bearing, 134, a TC bearing; 211. the drilling equipment comprises a conversion short section shell, 212, a communication joint, 213, an installation joint, 2131, an injection molding piece, 2132, an installation block, 2133, a fixing ring, 2134, a fixing bolt, 214, a conversion joint, 215, an upper sliding ring, 216, a reversing connecting rod, 217, a lower sliding ring, 218, a sealing plug, 241, a central rotating side wall shell, 242, a near bit shell, 243, a drilling engineering parameter measuring module, 244, a drilling track parameter measuring module, 245, a resistivity measuring module, 246, an azimuth gamma measuring module, 247, a signal processing and transmitting module, 248, a wire passing hole, 249 and a water passing channel.
Detailed Description
The following embodiments of the present invention are provided, and it should be noted that the present invention is not limited to the following embodiments, and all equivalent changes based on the technical solutions of the present invention are within the protection scope of the present invention.
Example 1:
as shown in fig. 1 to 7, the present embodiment provides a coal mine underground near-bit multi-parameter measurement while drilling system based on a hollow screw drilling tool, which includes a hollow screw drilling tool 1 and a near-bit measuring instrument 2;
the hollow screw drill 1 comprises a hollow motor assembly 11, a hollow cardan shaft assembly 12 and a hollow transmission shaft assembly 13 which are connected in sequence, and central through holes of the hollow motor assembly 11, the hollow cardan shaft assembly 12 and the hollow transmission shaft assembly 13 are communicated with each other to form a central through hole of the hollow screw drill 1 for mounting a near-bit measuring instrument 2;
the near-bit measuring instrument 2 comprises a conversion short section 21, a power supply short section 22, a universal shaft passing short section 23 and a near-bit measuring short section 24 which are sequentially connected; one end of a near-bit measuring short joint 24 is positioned in the hollow transmission shaft assembly 13, the other end of the near-bit measuring short joint is installed at the end part of the hollow transmission shaft assembly 13, and the near-bit measuring short joint 24 is used for measuring a drilling track parameter inclination angle, a coal measure stratum geological parameter azimuth gamma, resistivity and drilling engineering parameters such as bit pressure, torque, rotating speed and vibration at the near-bit position; the universal shaft passing nipple 23 is positioned in the hollow universal shaft assembly 12, a communication cable is arranged in the universal shaft passing nipple to connect the near-bit measuring nipple 24 and the power supply nipple 22, and the universal shaft passing nipple 23 is of a flexible structure to adapt to deformation generated by rotation of an unsteady axis of planetary motion in the hollow universal shaft assembly 12; the power supply short section 22 is positioned in the hollow motor assembly 11 and is provided with a rechargeable nickel-hydrogen battery pack to provide electric energy for the near-bit measuring short section 24; the conversion nipple 21 is installed at the end of the hollow motor assembly 11 and is used for converting the hollow rotor planetary motion non-fixed axis rotation of the hollow motor assembly 11 into coaxial rotation, and meanwhile, the conversion nipple is connected with the upper measuring system in a wired mode so as to transmit data measured by the near-bit multi-parameter measurement-while-drilling system to the upper measuring system and transmit the data to the orifice in real time by the upper measuring system.
The hollow motor assembly 11 comprises a hollow motor assembly shell 111, a stator 112 and a middle idle rotor 113 which are coaxially sleeved from outside to inside in sequence; the hollow cardan shaft assembly 12 comprises a hollow cardan shaft assembly housing 121 and a hollow cardan shaft 122 therein; the hollow transmission shaft assembly 13 comprises a hollow transmission shaft assembly shell 131, a hollow transmission shaft 132, and a rolling bearing 133 and a TC bearing 134 which are arranged between the hollow transmission shaft assembly shell 131 and the hollow transmission shaft 132;
the hollow motor assembly shell 111, the hollow cardan shaft assembly shell 121 and the hollow transmission shaft assembly shell 131 are connected in sequence; the hollow rotor 113, the hollow cardan shaft 122 and the hollow transmission shaft 132 are connected in sequence, and the central through holes of the three are communicated with each other to form the central through hole of the hollow screw drill 1.
The near bit measuring pup joint 24 comprises a center rotating side wall shell 241 and a near bit shell 242 which are connected through threads; the central rotating side wall shell 241 is positioned in a central through hole of the hollow transmission shaft 132, and the near bit shell 242 is in threaded connection with the hollow transmission shaft 132;
a drilling engineering parameter measuring module 243, a drilling track parameter measuring module 244, a resistivity measuring module 245 and an azimuth gamma measuring module 246 are arranged in the side wall of the near-bit shell 242; a signal processing and transmitting module 247 is arranged inside the center rotating side wall shell 241;
a through hole 248 is formed in the side wall of the near bit shell 242, a side wall turning center cable is arranged in the through hole 248, one end of the side wall turning center cable is connected with the engineering parameter measuring module 243, the drilling track parameter measuring module 244, the resistivity measuring module 245 and the azimuth gamma measuring module 246, and the other end of the side wall turning center cable is connected with the signal processing and transmitting module 247, so that a near bit measuring pup joint 24 power supply and signal transmission channel is formed;
the proximal bit housing 242 is provided with a water passage 249 for flushing fluid to enter the central through bore of the proximal bit housing 242.
The conversion short section 21 comprises a conversion short section shell 211, and one end of the conversion short section shell 211 is in threaded connection with the hollow motor assembly shell 111;
a communication joint 212, an installation joint 213, a conversion joint 214, an upper sliding ring 215, a reversing connecting rod 216, a lower sliding ring 217 and a sealing plug 218 are sequentially arranged in the conversion nipple shell 211; the end part and the inside of the mounting joint 213 are formed into an injection molding piece 2131 in an injection molding mode to mount the communication joint 212; three mounting blocks 2132 are uniformly distributed on the outer wall of the mounting joint 213 in the circumferential direction; a fixing ring 2133 is further arranged in an annular gap between the mounting joint 213 and the conversion nipple shell 211, three mounting holes are circumferentially uniformly distributed in the fixing ring 2133 and correspond to the three mounting blocks 2132, and a fixing bolt 2134 penetrates through the mounting holes and is connected with the mounting blocks 2132 so as to connect the fixing ring 2133 and the mounting joint 213 together; the fixing ring 2133 is in threaded connection with the inner wall of the conversion nipple shell 211 to realize the axial and circumferential fixing of the installation joint 213;
the reversing connecting rod 216 rotates along with the power supply short joint 22, and converts the planetary motion non-fixed axis rotation of the lower slip ring 217 into the coaxial rotation of the upper slip ring 215; a flexible cable is arranged in the center of the reversing connecting rod 216, and two ends of the flexible cable are respectively connected with the upper sliding ring 215 and the lower sliding ring 217; the lower slip ring 217 is connected with a sealing plug 218, and the sealing plug 218 is connected with the power supply short joint 22.
The central cable, the lower slip ring 217, the flexible cable, the upper slip ring 215, the adapter 214 and the central cable and the communication connector 212 in the mounting connector 213 in the sealing plug 218 are sequentially connected to form a wired signal transmission channel of the near-bit measuring instrument 2 and the upper measuring system.
When the hollow rotor 113, the hollow cardan shaft 122 and the hollow transmission shaft 132 rotate, the near bit measuring nipple 24, the universal shaft passing nipple 23, the power supply nipple 22 and the sealing plug 218, the lower slip ring 217 and the reversing connecting rod 216 in the conversion nipple 21 are driven to rotate together.
Example 2:
the embodiment provides a coal mine underground near bit multi-parameter measurement while drilling method based on a hollow screw drilling tool, which is realized by the coal mine underground near bit multi-parameter measurement while drilling system based on the hollow screw drilling tool in the embodiment 1, and comprises the following steps:
the method comprises the following steps: connecting an instrument: a drilling tool assembly which mainly comprises a near-bit multi-parameter measurement-while-drilling system is put into the drill hole, and the drill bit, the near-bit multi-parameter measurement-while-drilling system, an upper measurement system, a plurality of central cable-passing drill rods and a water feeder are arranged from the bottom of the hole to the orifice in sequence;
step two: directional drilling: adjusting the tool face angle of the hollow screw drilling tool to a preset angle, feeding a high-pressure flushing fluid into the hollow screw drilling tool by using a slurry pump, converting pressure energy into kinetic energy after the high-pressure flushing fluid flows through a gap between a hollow rotor and a stator, driving the hollow rotor to rotate, driving a hollow universal shaft and a hollow transmission shaft to rotate, driving a power supply short section, a cross universal shaft short section and a near drill bit measuring short section to rotate together, and driving a drill bit to rotate and crush rock;
step three: near-bit information dynamic measurement while drilling: in the directional drilling process, a near-bit measuring instrument measures drilling track parameters (inclination angle), coal-based stratum geological parameters (azimuth gamma, resistivity) and drilling engineering parameters (bit pressure, torque, rotating speed and vibration) at a near-bit position, the measured data are transmitted to an upper measuring system in a wired mode through a conversion short section, the upper measuring system carries out noise reduction processing on a near-bit signal and then transmits the signal to an orifice, and an orifice device receives, processes and displays near-bit information;
step four: optimizing and adjusting a drilling scheme: after receiving drilling track parameters (inclination angle) at a near-bit position, coal-based stratum geological parameters (azimuth gamma and resistivity) and drilling engineering parameters (bit pressure, torque, rotating speed and vibration) measured by a near-bit measuring instrument, the orifice device identifies the stratum while drilling and judges the drilling working condition, optimizes the drilling design track and adjusts the drilling track to construct along a target stratum; meanwhile, drilling parameters such as pump pressure, pump capacity, drilling pressure, drilling speed and the like are adjusted, and efficient drilling is carried out on the basis of ensuring safety;
step five: final hole withdrawal: and repeating the second step, the third step and the fourth step until the design depth is reached, completing the directional drilling construction, and withdrawing the instruments and drilling tools in the hole.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (7)
1. The coal mine underground near-bit multi-parameter measurement while drilling system based on the hollow screw drilling tool is characterized by comprising a hollow screw drilling tool (1) and a near-bit measuring instrument (2);
the hollow screw drilling tool (1) comprises a hollow motor assembly (11), a hollow cardan shaft assembly (12) and a hollow transmission shaft assembly (13) which are sequentially connected, and central through holes of the hollow motor assembly, the hollow cardan shaft assembly and the hollow transmission shaft assembly are communicated with each other to form a central through hole of the hollow screw drilling tool (1) for mounting a near-bit measuring instrument (2);
the near-bit measuring instrument (2) comprises a conversion short section (21), a power supply short section (22), a universal shaft passing short section (23) and a near-bit measuring short section (24) which are connected in sequence; one end of a near-bit measuring short joint (24) is positioned in the hollow transmission shaft assembly (13), the other end of the near-bit measuring short joint is arranged at the end part of the hollow transmission shaft assembly (13), and the near-bit measuring short joint (24) is used for measuring drilling track parameters, coal measure stratum geological parameters and drilling engineering parameters at the near-bit position; the universal shaft passing nipple (23) is positioned in the hollow universal shaft assembly (12), a communication cable is arranged in the universal shaft passing nipple to connect a near-bit measuring nipple (24) and a power supply nipple (22), and the universal shaft passing nipple (23) is of a flexible structure to adapt to deformation generated by rotation of an uncertain axis of planetary motion in the hollow universal shaft assembly (12); the power supply short section (22) is positioned in the hollow motor assembly (11) and is provided with a rechargeable nickel-hydrogen battery pack to provide electric energy for the near-bit measuring short section (24); the conversion nipple (21) is installed at the end part of the hollow motor assembly (11) and is used for converting the hollow rotor planetary motion indefinite axis rotation of the hollow motor assembly (11) into coaxial rotation, and meanwhile, the conversion nipple is connected with the upper measuring system in a wired mode so as to transmit data measured by the near-bit multi-parameter measurement-while-drilling system to the upper measuring system and transmit the data to the orifice in real time by the upper measuring system.
2. The hollow screw drilling tool-based underground coal mine near-bit multi-parameter measurement-while-drilling system is characterized in that the hollow motor assembly (11) comprises a hollow motor assembly shell (111), a stator (112) and a hollow rotor (113) which are coaxially sleeved from outside to inside in sequence; the hollow cardan shaft assembly (12) comprises a hollow cardan shaft assembly shell (121) and a hollow cardan shaft (122) in the hollow cardan shaft assembly shell; the hollow transmission shaft assembly (13) comprises a hollow transmission shaft assembly shell (131), a hollow transmission shaft (132), a rolling bearing (133) and a TC bearing (134) which are arranged between the hollow transmission shaft assembly shell (131) and the hollow transmission shaft (132);
the hollow motor assembly shell (111), the hollow cardan shaft assembly shell (121) and the hollow transmission shaft assembly shell (131) are connected in sequence; the hollow rotor (113), the hollow cardan shaft (122) and the hollow transmission shaft (132) are sequentially connected, and central through holes of the hollow rotor, the hollow cardan shaft and the hollow transmission shaft are mutually communicated to form a central through hole of the hollow screw drilling tool (1).
3. The hollow screw drilling tool-based coal mine underground near-bit multi-parameter measurement-while-drilling system is characterized in that the near-bit measurement sub (24) comprises a center-turning sidewall shell (241) and a near-bit shell (242), and the center-turning sidewall shell and the near-bit shell are connected through threads; the center rotating side wall shell (241) is positioned in a center through hole of the hollow transmission shaft (132), and the near bit shell (242) is in threaded connection with the hollow transmission shaft (132);
a drilling engineering parameter measuring module (243), a drilling track parameter measuring module (244), a resistivity measuring module (245) and an azimuth gamma measuring module (246) are arranged in the side wall of the near-bit shell (242); a signal processing and transmitting module (247) is arranged inside the center rotating side wall shell (241);
a wire passing hole (248) is formed in the side wall of the near bit shell (242), a side wall rotating center cable is arranged in the wire passing hole (248), one end of the side wall rotating center cable is connected with an engineering parameter measuring module (243), a drilling track parameter measuring module (244), a resistivity measuring module (245) and an orientation gamma measuring module (246), and the other end of the side wall rotating center cable is connected with a signal processing and transmitting module (247) to form a near bit measuring short section (24) power supply and signal transmission channel;
the near-bit shell (242) is provided with a water passing channel (249) so that flushing liquid enters the central through hole of the near-bit shell (242).
4. The hollow screw drilling tool-based coal mine underground near-bit multi-parameter measurement-while-drilling system is characterized in that the conversion nipple (21) comprises a conversion nipple shell (211), and one end of the conversion nipple shell (211) is in threaded connection with the hollow motor assembly shell 111;
a communication joint (212), an installation joint (213), a conversion joint (214), an upper sliding ring (215), a reversing connecting rod (216), a lower sliding ring (217) and a sealing plug (218) are sequentially arranged in the conversion short section shell (211); the end part and the inside of the mounting joint (213) are formed into an injection molding piece (2131) in an injection molding mode so as to mount the communication joint (212); three mounting blocks (2132) are uniformly distributed on the outer wall of the mounting joint (213) in the circumferential direction; a fixing ring (2133) is further arranged in an annular gap between the mounting joint (213) and the conversion short section shell (211), three mounting holes are circumferentially uniformly distributed in the fixing ring (2133) and correspond to the three mounting blocks (2132), and a fixing bolt (2134) penetrates through the mounting holes and is connected with the mounting blocks (2132) so as to connect the fixing ring (2133) and the mounting joint (213) together; the fixing ring (2133) is in threaded connection with the inner wall of the conversion nipple shell (211) to realize the axial and circumferential fixing of the installation joint (213);
the reversing connecting rod (216) rotates along with the power supply short joint (22), and the planetary motion indefinite-axis rotation of the lower sliding ring (217) is converted into the coaxial rotation of the upper sliding ring (215); a flexible cable is arranged in the center of the reversing connecting rod (216), and two ends of the flexible cable are respectively connected with the upper sliding ring (215) and the lower sliding ring (217); the lower sliding ring (217) is connected with a sealing plug (218), and the sealing plug (218) is connected with the power supply short section (22).
5. The hollow screw drill tool-based coal mine underground near-bit multi-parameter measurement-while-drilling system is characterized in that a central cable, a lower sliding ring (217), a flexible cable, an upper sliding ring (215), a conversion joint (214) and a central cable and a communication joint (212) in an installation joint (213) in a sealing plug (218) are sequentially connected to form a wired signal transmission channel of a near-bit measuring instrument (2) and the upper measuring system.
6. The hollow screw drilling tool-based coal mine underground near bit multi-parameter measurement-while-drilling system is characterized in that the hollow rotor (113), the hollow cardan shaft (122) and the hollow transmission shaft (132) are driven to rotate together with the near bit measuring nipple (24), the universal shaft passing nipple (23), the power supply nipple (22), a sealing plug (218) in the conversion nipple (21), a lower sliding ring (217) and a reversing connecting rod (216).
7. The method for the underground coal mine near-bit multi-parameter measurement while drilling based on the hollow screw drilling tool is characterized by being realized by the underground coal mine near-bit multi-parameter measurement while drilling system based on the hollow screw drilling tool as claimed in claim 5 or 6, and comprising the following steps of:
the method comprises the following steps: connecting an instrument: a drilling tool assembly which mainly comprises a near-bit multi-parameter measurement-while-drilling system is put into the drill hole, and the drill bit, the near-bit multi-parameter measurement-while-drilling system, an upper measurement system, a plurality of central cable-passing drill rods and a water feeder are arranged from the bottom of the hole to the orifice in sequence;
step two: directional drilling: adjusting the tool face angle of the hollow screw drilling tool to a preset angle, feeding a high-pressure flushing fluid into the hollow screw drilling tool by using a slurry pump, converting pressure energy into kinetic energy after the high-pressure flushing fluid flows through a gap between a hollow rotor and a stator, driving the hollow rotor to rotate, driving a hollow universal shaft and a hollow transmission shaft to rotate, driving a power supply short section, a cross universal shaft short section and a near drill bit measuring short section to rotate together, and driving a drill bit to rotate and crush rock;
step three: near-bit information dynamic measurement while drilling: in the directional drilling process, a near-bit measuring instrument measures drilling track parameters, coal measure stratum geological parameters and drilling engineering parameters at a near-bit position, measurement data are transmitted to an upper measurement system in a wired mode through a conversion short section, the upper measurement system conducts noise reduction processing on near-bit signals and then transmits the near-bit signals to an orifice, and an orifice device receives, processes and displays near-bit information;
step four: optimizing and adjusting a drilling scheme: after receiving drilling track parameters, coal measure stratum geological parameters and drilling engineering parameters measured by a near-bit measuring instrument, the orifice device identifies the stratum while drilling and judges the drilling working condition, optimizes the drilling design track and adjusts the drilling track to construct along the target stratum; meanwhile, drilling parameters such as pump pressure, pump capacity, drilling pressure, drilling speed and the like are adjusted, and efficient drilling is carried out on the basis of ensuring safety;
step five: final hole withdrawal: and repeating the second step, the third step and the fourth step until the design depth is reached, completing the directional drilling construction, and withdrawing the instruments and drilling tools in the hole.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115584959A (en) * | 2022-10-09 | 2023-01-10 | 平顶山市安泰华矿用安全设备制造有限公司 | Rotary drilling machine drilling track control method and drilling equipment |
| CN116723428A (en) * | 2023-08-09 | 2023-09-08 | 德州联合石油科技股份有限公司 | Near-bit guiding system and screw drilling tool |
| WO2024041667A1 (en) * | 2022-08-24 | 2024-02-29 | 中煤科工西安研究院(集团)有限公司 | Multi-parameter measurement-while-drilling system for underground coal mines, and measurement method |
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2022
- 2022-03-24 CN CN202210297337.8A patent/CN114607347A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024041667A1 (en) * | 2022-08-24 | 2024-02-29 | 中煤科工西安研究院(集团)有限公司 | Multi-parameter measurement-while-drilling system for underground coal mines, and measurement method |
| CN115584959A (en) * | 2022-10-09 | 2023-01-10 | 平顶山市安泰华矿用安全设备制造有限公司 | Rotary drilling machine drilling track control method and drilling equipment |
| CN116723428A (en) * | 2023-08-09 | 2023-09-08 | 德州联合石油科技股份有限公司 | Near-bit guiding system and screw drilling tool |
| CN116723428B (en) * | 2023-08-09 | 2023-11-17 | 德州联合石油科技股份有限公司 | Near-bit guiding system and screw drilling tool |
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