US 11,814,944 B2
Reactive torque automatic balancing device for screw drilling tool, drilling string, and method
Deshuai Zheng, Beijing (CN); Menggang Li, Beijing (CN); Chengcheng Niu, Beijing (CN); Xiangyang Zhao, Beijing (CN); and Lingling Yu, Beijing (CN)
Assigned to CHINA PETROLEUM & CHEMICAL CORPORATION, Beijing (CN); and SINOPEC RESEARCH INSTITUTE OF PETROLEUM ENGINEERING, Beijing (CN)
Appl. No. 17/594,750
Filed by CHINA PETROLEUM & CHEMICAL CORPORATION, Beijing (CN); and SINOPEC RESEARCH INSTITUTE OF PETROLEUM ENGINEERING, Beijing (CN)
PCT Filed Apr. 15, 2020, PCT No. PCT/CN2020/084952
§ 371(c)(1), (2) Date Apr. 5, 2022,
PCT Pub. No. WO2020/221010, PCT Pub. Date Nov. 5, 2020.
Claims priority of application No. 201910361879.5 (CN), filed on Apr. 30, 2019.
Prior Publication US 2022/0316312 A1, Oct. 6, 2022
Int. Cl. E21B 44/04 (2006.01); E21B 4/00 (2006.01); E21B 7/04 (2006.01); E21B 17/22 (2006.01)
CPC E21B 44/04 (2013.01) [E21B 4/003 (2013.01); E21B 7/046 (2013.01); E21B 17/22 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A reactive torque automatic balancing device for a screw drilling tool, comprising:
a cylindrical upper joint;
a core cylinder arranged in an inner chamber of the upper joint, the core cylinder having an inner chamber configured to be in fluid communication with the screw drilling tool so that a drilling fluid from the inner chamber of the upper joint flows to the screw drilling tool through the inner chamber of the core cylinder to allow the screw drilling tool to perform drilling;
a cylindrical lower joint fixedly arranged at a lower end of the core cylinder, a part of the lower joint extending out of the inner chamber of the upper joint, configured to be fixedly connected to the screw drilling tool through a lower drill rod; and
an automatic balancing assembly arranged between an outer wall of the core cylinder and an inner wall of the upper joint, wherein the automatic balancing assembly is driven by hydraulic pressure generated by a portion of the drilling fluid flowing through the inner chamber of the upper joint,
wherein, when the drilling fluid has a displacement equal to a first predetermined value, the automatic balance assembly provides a friction torque generated between the upper joint and the core cylinder that is equal to a reactive torque generated on the screw drilling tool, for performing directional drilling,
when the displacement of the drilling fluid is higher than the first predetermined value, the automatic balance assembly provides the friction torque generated between the upper joint and the core cylinder that is greater than the reactive torque generated on the screw drilling tool, which causes the core cylinder to drive the screw drilling tool in rotation, for performing combined drilling.