Dual-speed dual—core enhanced drilling equipment

US11225837B2 · kind B2 · utility

Assignees

• CNPC CHUANQING DRILLING ENGINEERING COMPANY LIMITED · CN
• CCDC PETROLEUM DRILLING & PRODUCTION TECHNOLOGY CO LTD · CN

Inventors

• Liexiang Han · Beijing, CN
• Zuo Chen · Chengdu, CN
• Bin LIU · Chengdu, CN
• Xiaofeng YANG · Chengdu, CN
• Sheng-Kang Yu · Hsinchu, TW
• Jianlin Yao · Chaole, CN
• Gang Zhou · Berkeley Heights, US
• Ming Feng · Chaole, CN
• Shiming Dong · Chaole, CN
• Kunpeng Yao · Chaole, CN
• Weicheng Li · Chaole, CN
• Lei Li · Zhengzhou, CN
• Xiaoping Fu · Shanghai, CN
• Zhijun Lyu · Shanghai, CN
• Wencai Chen · Chaole, CN
• Yong Li · Chaole, CN

Key dates

• Filing date: Dec 23, 2020
• Grant date: Jan 18, 2022
• Expiry date: Dec 23, 2040

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21B21/10
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

A dual-speed and dual-core enhanced drilling equipment which has an outer cylinder, a downhole power device, a large cutting head and a small cutting head. Specifically, the large cutting head has a first centerline, a through hole arranged along the first centerline and a first diameter. The outer cylinder, which is sleeved outside the downhole power device, is connected to the upper drill string with the large cutting head to enable rotation among the large cutting head, downhole power device and upper drill string. The downhole power device has a power generation section capable of generating power, and a rotation output section which connects to, and provides independent power for the small cutting head, so that the small cutting head revolves around the first centerline under the driving of the upper drill string while rotating under the driving of the downhole power device.