Bit for drilling wells and associated drilling method
US8960335B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 22, 2008 |
| Grant date | Feb 24, 2015 |
| Priority date | — |
| Expiry date | Apr 22, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B25/10
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A bit for drilling wells has a front face with radial blades having cutting elements distributed around the front face. A space for forming a core is situated at the center of the front face. A cavity is provided for evacuating the core towards a periphery of the bit. At least a portion of the cavity is situated between adjacent blades. The cavity is delimited by two lateral surfaces and a clearance surface set back with respect to the front face, and the cavity is open in a direction opposite the clearance surface. The bit may be used in methods for drilling wells and makes it possible to rapidly drill wells of great depth in all types of rock without the risk of clogging.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.