Patent · US Active

Active control method and control device for wellbore pressure in the open-cycle drilling of marine natural gas hydrates

US11002126B2 · kind B2 · utility

1Cited by

1References

10Claims

0Family size

Assignee

CHINA UNIVERSITY OF PETROLEUM (EAST CHINA) · CN

Inventors

Zhiyuan Wang · Qingdao, CN
Jianbo Zhang · Dongying, CN
Baojiang Sun · Shandong, CN
Wenqiang Lou · Qingdao, CN
Xiaohui Sun · Beijing, CN
Zheng Liu · Shanghai, CN
Shikun Tong · Qingdao, CN

Key dates

Filing date	Dec 3, 2020
Grant date	May 11, 2021
Priority date	—
Expiry date	Dec 3, 2040

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B2200/20
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

An active control method and system for wellbore pressure in open-cycle drilling in marine natural gas hydrates. The system comprises a drilling system, a drilling fluid injection system, and a data processing system for conducting the drilling operation.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.