US 12,448,885 B2
Mud pressure wave signal modulation apparatus and method
Jiajin Wang, Beijing (CN); Weimin Mao, Beijing (CN); Weiping Ai, Beijing (CN); Yifeng Fan, Beijing (CN); Xiurong Dou, Beijing (CN); Hengtian Jia, Beijing (CN); Peng Wang, Beijing (CN); Zhigang Wei, Beijing (CN); Lei Wang, Beijing (CN); and Xianwei Guo, Beijing (CN)
Assigned to China National Petroleum Corporation, Beijing (CN); and CNPC Engineering Technology R&D Company Limited, Beijing (CN)
Appl. No. 18/566,144
Filed by China National Petroleum Corporation, Beijing (CN); and CNPC Engineering Technology R&D Company Limited, Beijing (CN)
PCT Filed Dec. 6, 2022, PCT No. PCT/CN2022/136741
§ 371(c)(1), (2) Date Dec. 1, 2023,
PCT Pub. No. WO2023/124814, PCT Pub. Date Jul. 6, 2023.
Claims priority of application No. 202111655444.5 (CN), filed on Dec. 30, 2021.
Prior Publication US 2024/0247586 A1, Jul. 25, 2024
Int. Cl. E21B 47/20 (2012.01); E21B 4/04 (2006.01); E21B 44/00 (2006.01)
CPC E21B 47/20 (2020.05) [E21B 4/04 (2013.01); E21B 44/005 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A mud pressure wave signal modulation apparatus, comprising a motor, a valve plate, a main control circuit, a motor drive control circuit, and a downhole communication circuit;
wherein the valve plate is driven by the motor to be rotated around an axial direction perpendicular to a flow direction of drilling fluid, and a cross-section for controlling a size of an actual flow channel of the drilling fluid in a drilling fluid channel is formed through the rotation of the valve plate; the motor and the valve plate are disposed in the drilling fluid channel, and the drilling fluid channel, the main control circuit, the motor drive control circuit and the downhole communication circuit are disposed in a drill collar; and
the main control circuit is configured to receive downhole Measurement While Drilling data sent by the downhole communication circuit, generate a control sequence based on motor data provided by the motor drive control circuit, angle information of the valve plate provided by the downhole communication circuit and a preset working mode, when determining that the downhole Measurement While Drilling data needs to be transmitted to ground according to a preset program, and send the control sequence to the motor drive control circuit so that the motor drive control circuit controls the motor to work in the preset working mode.