Gyro measurement while drilling system and method therefor

US11220899B2 · kind B2 · utility

Assignee

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

Inventors

• Xu Xue · Beijing, CN
• Yang Dong · Cleveland Heights, US
• Xiaoxiao Zhang · Fort Worth, US
• Changchun Yang · Beijing, CN

Key dates

• Filing date: Dec 30, 2020
• Grant date: Jan 11, 2022
• Expiry date: Dec 30, 2040

Classification

• Technology area (CPC G): Physics
• CPC primary: G01C21/16
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A gyro measurement while drilling system, which includes a strapdown inertial unit, a filtering and level conversion module, a data acquisition and data communication module, a driving mechanism, a driving control module and a navigation computer. A gyro measurement while drilling method, which is used in the measurement while drilling system and includes one or a combination of the following methods: a full parameter variable compensation method, an initial alignment algorithm and a continuous measurement while drilling method. The system and method of the present disclosure can meet the most demanding application scenarios in the field of petroleum drilling measurement, i.e., measurement while drilling (MWD), and are compatible with other scenarios, such as wireline measurement, gyro steerable measurement and other application fields; the system and method also solve the problems of environmental adaptability, bias repeatability and bias error of a gyroscope in a high-temperature and vibration environment, and solve the technical problems of an inertial instrument in a deep steerable drilling application scenario from the perspective of systems.