US 12,168,930 B2
Short-radius drilling tool, track-controllable lateral drilling tool and method
Zichen Xu, Beijing (CN); Zhonghua Yang, Beijing (CN); and Xiaoyue Wan, Beijing (CN)
Assigned to Xiaoyue Wan, Beijing (CN)
Appl. No. 18/032,406
Filed by Xiaoyue Wan, Beijing (CN)
PCT Filed Oct. 19, 2021, PCT No. PCT/CN2021/124796
§ 371(c)(1), (2) Date Aug. 28, 2023,
PCT Pub. No. WO2022/083602, PCT Pub. Date Apr. 28, 2022.
Claims priority of application No. 202011119606.9 (CN), filed on Oct. 19, 2020; application No. 202011358655.8 (CN), filed on Nov. 27, 2020; application No. 202110075355.7 (CN), filed on Jan. 20, 2021; and application No. 202110076907.6 (CN), filed on Jan. 20, 2021.
Prior Publication US 2024/0263518 A1, Aug. 8, 2024
Int. Cl. E21B 7/06 (2006.01); E21B 17/20 (2006.01); E21B 47/12 (2012.01)
CPC E21B 7/06 (2013.01) [E21B 17/20 (2013.01); E21B 47/12 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A trajectory-controllable lateral drilling tool comprising a lateral drilling section and a power transmission section, the lateral drilling section is capable of drilling an extension well section of a deviating well section that extends laterally from a main wellbore, and the lateral drilling section sequentially comprises a drill bit, a steering short pup joint, and a transmission short pup joint array from front to back;
the transmission short pup joint array comprises a plurality of transmission short pup joints used to bear torque, the transmission short pup joints are capable of transmitting the rotary drilling power to the drill bit, and a deflection limit is preset between the every two adjacent transmission short pup joints; and
the transmission short pup joint array includes a through structure in its own axis direction, and the through structure forms a main flow channel for the circulation of a drilling circulating medium;
wherein:
the steering short pup joint comprises an internally penetrated supporting structure, a hydraulic splitter, an electrical actuator, and one or several hydraulic piston subassemblies fixedly connected to the supporting structure of the steering short pup joint in the circumferential direction; and
the electrical actuator is capable of driving the hydraulic splitter to allocate hydraulic fluid to the one or several hydraulic piston subassemblies, and distributing hydraulic fluid to each of the one or several hydraulic piston subassemblies, thereby controlling the hydraulic pressure status of each of the one or several hydraulic piston subassemblies.