Liner drilling method
US7784552B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 25, 2008 |
| Grant date | Aug 31, 2010 |
| Priority date | — |
| Expiry date | Feb 24, 2029 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/14
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An installation system for installing a liner in a well includes drilling while simultaneously running the liner. A string of drill pipe with a bottom hole assembly including a drill bit on a lower end is lowered into the liner while the liner is suspended at the rig floor. The bottom hole assembly engages a lower sub of the liner for torque transmission. A running tool secured to the drill pipe engages the upper sub such that the running tool supports the weight of the liner and transmits torque. The drill pipe and liner are rotated to drill deeper into the wellbore. The liner hanger can be set to engage the casing, then released and reset at a different point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.