US 12,435,569 B2
Directional well hydraulic clutch drill string full rotation controller
Jialin Tian, Chengdu (CN); Lei Cha, Chengdu (CN); Lin Teng, Chengdu (CN); and Lanhui Mao, Chengdu (CN)
Assigned to SOUTHWEST PETROLEUM UNIVERSITY, Chengdu (CN); NANTONG XIEMING TECHNOLOGY CO.. LTD., Nantong (CN); and SICHUAN XIEMING TECHNOLOGY CO., LTD., Chengdu (CN)
Filed by Southwest Petroleum University, Chengdu (CN); Nantong Xieming Technology Co., Ltd., Nantong (CN); and Sichuan Xieming Technology Co., Ltd., Chengdu (CN)
Filed on Jul. 31, 2023, as Appl. No. 18/362,324.
Claims priority of application No. 202310783881.8 (CN), filed on Jun. 29, 2023.
Prior Publication US 2025/0116159 A1, Apr. 10, 2025
Int. Cl. E21B 7/04 (2006.01); E21B 4/00 (2006.01); E21B 4/02 (2006.01)
CPC E21B 7/04 (2013.01) [E21B 4/003 (2013.01); E21B 4/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A directional well hydraulic clutch drill string full rotation controller, comprising: a rotating assembly, a power assembly, and a control assembly; wherein
the rotating assembly includes an upper mandrel, an upper bearing member, a first bearing positioning member, a second bearing positioning member, a bearing group, a lower bearing member, an upper casing, a rotating casing, an adapter, and a water cap joint; the rotating assembly rotates independently from the upper casing, the upper mandrel transmits a torque to an upper living hinge, the first bearing positioning member and the second bearing positioning member are adjacent to and position the bearing group, and the adapter and the water cap joint divide a drilling fluid;
the power assembly includes a cross universal joint shaft, a fluid conversion joint, a rotor, a stator housing, an inner bushing, a flexible shaft, a conversion housing, an upper cover, a first bearing, an oil duct, an oil sealing screw, a second bearing and a connecting head; the stator housing transmits a positive torque, and the flexible shaft balances a planetary motion of the rotor; and
the control assembly includes a control housing, an anti-drop ring, a controller, a positioning sleeve, a central tube, a stability control mandrel, a cylindrical needle roller, a stability control housing and a flow control system circuit, wherein the control assembly is configured to control a magnitude of the positive torque and prevent the stator housing from reversing, so as to ensure a stability of a tool face.