Stabilizer for drill strings
US7954566B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 22, 2007 |
| Grant date | Jun 7, 2011 |
| Priority date | — |
| Expiry date | Jan 2, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49865
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Apparatus and methods for using the drilling apparatus to increase the linear direction of the drilling action are described. The drilling apparatus contains a drill rod that is fitted with a reinforcing sleeve that is located on the drill rod as close as possible to the drill bit. The outer diameter of the sleeve is configured to be substantially the same as the bit diameter and, if necessary, just slightly smaller than the bit diameter. The sleeve reinforces the drill rod next to the drill bit and reduces and substantially eliminates the gap between the drill rod and the borehole in the vicinity of the drill bit. The sleeve, therefore, reduces the wobble of the drill bit in the borehole and reduces the drill bit from wavering from a straight linear drilling direction. The reinforcing sleeve can contain helical channels for moving material displaced by the drilling process away from the drill bit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.