US 12,448,847 B2
Coal mine intelligent directional drill and drilling method therefor
Qingfeng Wang, ChongQing (CN); Dezhong Xin, ChongQing (CN); Jun Wan, ChongQing (CN); Hang Chen, ChongQing (CN); Xiaohua Liu, ChongQing (CN); Yuqing Xiao, ChongQing (CN); Daihui Ma, ChongQing (CN); Shizhai Zhang, ChongQing (CN); Lin Yang, ChongQing (CN); Zhengang Ma, ChongQing (CN); Xin Dou, ChongQing (CN); Min Tang, ChongQing (CN); Jian Pu, ChongQing (CN); Keyu Chen, ChongQing (CN); Jinjun Lv, ChongQing (CN); Yuan Wan, ChongQing (CN); Xing Wang, ChongQing (CN); Shiping Lu, ChongQing (CN); Fujia Zhou, ChongQing (CN); Changjiang Li, ChongQing (CN); Yi Qin, ChongQing (CN); and Yange Yang, ChongQing (CN)
Assigned to CCTEG ChongQing Research Institute Co., Ltd., Chongqing (CN)
Appl. No. 18/875,732
Filed by CCTEG CHONGQING RESEARCH INSTITUTE, ChongQing (CN)
PCT Filed Sep. 21, 2023, PCT No. PCT/CN2023/120215
§ 371(c)(1), (2) Date Dec. 17, 2024,
PCT Pub. No. WO2025/043787, PCT Pub. Date Mar. 6, 2025.
Claims priority of application No. 202311093146.0 (CN), filed on Aug. 28, 2023.
Prior Publication US 2025/0305364 A1, Oct. 2, 2025
Int. Cl. E21B 3/02 (2006.01); E21B 7/04 (2006.01); E21B 19/14 (2006.01); E21B 44/00 (2006.01)
CPC E21B 7/04 (2013.01) [E21B 3/02 (2013.01); E21B 19/14 (2013.01); E21B 44/00 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A coal mine intelligent directional drill, comprising a moving platform, a machine frame, a clamper, a main manipulator, a power head, a drill pipe storage system, a control system and a hydraulic system, wherein the machine frame, the drill pipe storage system, the control system, the hydraulic system and the main manipulator are installed on the moving platform, the clamper and the power head are installed on both ends of the machine frame, respectively, the power head comprises a main motor, a gearbox and a main shaft, the gearbox is provided with a driving shaft, one end of the driving shaft is connected with the main motor, the driving shaft is engaged with the main shaft through a gear in the gearbox, a drill pipe is circumferentially and fixedly connected with the main shaft, a downhole motor is arranged at the front end of the drill pipe to serve as a downhole drilling actuator, and the other end of the driving shaft is connected with an angle adjuster through the gearbox;
the angle adjuster comprises a transmission shaft, a fixed toothed disk, a moving toothed disk, a rotary seat and a rotary speed reducer with a self-locking function, one end of the transmission shaft is circumferentially and fixedly connected with the driving shaft, the fixed toothed disk and the moving toothed disk are sheathed on the transmission shaft, the fixed toothed disk is engaged with the moving toothed disk through skewed teeth, the fixed toothed disk is circumferentially and fixedly connected with the transmission shaft, the moving toothed disk is rotationally connected with the transmission shaft, and the moving toothed disk can slide along an axial direction of the transmission shaft;
the rotary seat is sheathed on and circumferentially and fixedly connected with the moving toothed disk, and an output disk of the rotary speed reducer is coaxially and fixedly connected with the rotary seat to transfer rotation of the output disk of the rotary speed reducer to the moving toothed disk;
the control system comprises a toolface azimuth detection and initialization system, the toolface azimuth detection and initialization system comprises a first segment, a second segment and a third segment which are connected in sequence, a first signal combination identifier is arranged in the first segment, a first sensor and a second signal combination identifier are arranged in the second segment, a second sensor is arranged in the third segment, an angle ϕ between the first sensor and the first signal combination identifier is measured by the first sensor, and an angle ρ between the second sensor and the second signal combination identifier is measured by the second sensor;
the first signal combination identifier comprises a first signal source and a second signal source, and the first signal source and the second signal source are opposite and in staggered arrangement in the first segment; and the second signal combination identifier comprises a third signal source and a fourth signal source, and the third signal source and the fourth signal source are opposite and in staggered arrangement in the second segment;
the first segment is the downhole motor, the second segment is a gauging nipple mounting pipe, and the third segment is the drill pipe;
during measurement, the second sensor of the third segment is pointed to a 0° direction, an initial angle of a toolface azimuth of the first segment is ω=ϕ+ρ, and an upward direction perpendicular to a horizontal plane is taken as the 0° direction of the second sensor.