Tension/collar/reamer assemblies and methods
US7730971B2 · kind B2 · utility
1Cited by
27References
45Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 25, 2008 |
| Grant date | Jun 8, 2010 |
| Priority date | — |
| Expiry date | Feb 25, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/16
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention provides drilling assembles and methods that are especially useful for a bottom hole drilling assembly for drilling/reaming/or other operations related to drilling a borehole through an earth formation. In one embodiment, the drilling assembly utilizes standard drill collars which are modified to accept force transfer sections. In another embodiment, the drilling assembly comprises a tension inducing sub which creates a force that may be used to place the bottom hole assembly or portions thereof in tension. In another embodiment, a reaming assembly is held in tension to provide a stiffer reaming assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.