Invention Grant
- Patent Title: Method for drilling with a wellbore liner
- Patent Title (中): 用井眼衬板钻孔的方法
-
Application No.: US11461248Application Date: 2006-07-31
-
Publication No.: US07647990B2Publication Date: 2010-01-19
- Inventor: Robert M. Tessari , Tommy M. Warren , Barry J. Tate
- Applicant: Robert M. Tessari , Tommy M. Warren , Barry J. Tate
- Applicant Address: CA Calgary, Alberta
- Assignee: Tesco Corporation
- Current Assignee: Tesco Corporation
- Current Assignee Address: CA Calgary, Alberta
- Agency: Bracewell & Giuliani LLP
- Main IPC: E21B7/20
- IPC: E21B7/20

Abstract:
A method for drilling with a liner includes: providing a liner string including an upper portion extending towards surface and a lower portion; drilling to a depth with the liner string; disconnecting the upper portion from the lower portion; pulling the upper portion from the well; and leaving the lower portion in the well to line the wellbore. A drilling assembly for drilling a borehole with a borehole liner includes: an upper liner string; a lower liner string including an upper end and a lower end; a releasable connector connecting the lower liner string to the upper liner string; and a drilling assembly connectable at the lower end of the lower liner string.
Public/Granted literature
- US20070175665A1 METHOD FOR DRILLING WITH A WELLBORE LINER Public/Granted day:2007-08-02
Information query