Constant amplitude adjusting method and system for pressure pulse of drilling tool

US10830037B2 · kind B2 · utility

Assignee

• Institute of Geology and Geophysics, Chinese Academy of Sciences · CN

Inventors

• Jiansheng Du · Beijing, CN
• Qingyun Di · Beijing, CN
• Zili Wang · Beijing, CN
• Wenxuan Chen · Beijing, CN
• Xinzhen He · Beijing, CN
• Yongyou Yang · Beijing, CN

Key dates

• Filing date: Dec 16, 2019
• Grant date: Nov 10, 2020
• Expiry date: Dec 16, 2039

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21B47/24
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

A constant amplitude adjusting method and system for pressure pulse of drilling tool including obtaining a current flow velocity value of mud at the rear of a pressure pulse generator in the drilling tool, and sending the current flow velocity value to a controller; the controller compares the current flow velocity value with a preset flow velocity value, and sends an adjustment instruction to the pressure pulse generator according to the comparison result; the pressure pulse generator adjusts the opening degree according to the adjustment instruction of the controller. The adjusting system comprising a pressure pulse generator for generating a pressure pulse wave, and the opening degree is adjustable.