Drill string rotation controller for directional drilling

US11834928B1 · kind B1 · utility

Assignees

• Southwest Petroleum University · CN
• Sichuan Xieming Technology Co., Ltd. · CN

Inventors

• Jialin Tian · Chengdu, CN
• Haolin Song · Chengdu, CN
• Yinglin Yang · Plano, US
• Yanniu Ren · Chengdu, CN
• Lin Yang · Shanghai, CN
• Zhe Zhang · Foshan, CN
• Bo He · Guanghan, CN
• Jun Li · Chengdu, CN
• Yu Wei · Chengdu, CN
• Lei Cha · Chengdu, CN

Key dates

• Filing date: Sep 28, 2022
• Grant date: Dec 5, 2023
• Expiry date: Sep 28, 2042

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21B7/067
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

A drill string rotation controller includes an anti-torque balance module, a TC bearing retaining ring, an upper TC bearing, an upper thrust ball bearing, an upper Haval ring, a middle seal retaining ring, an upper mandrel, an upper shell, a rotary control cylinder, an upper spring, a spline shell, a spline sleeve, a spline mandrel, a lower shell, a spring push sleeve, a lower spring, a floating piston, a lower mandrel, a bulkhead, a lower thrust ball bearing, a lower Haval ring, a lower TC bearing, a conversion joint, an anti-drop joint, a lower joint, and a control pin. The rotary control cylinder causes the spline sleeve to switch the transmission relationship between the spline mandrel and shell. Therefore, the drill string rotation controller controls the conversion between the composite drilling mode and the directional drilling mode.