Roller cone drill bits with improved fluid flow
US8312942B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 2007 |
| Grant date | Nov 20, 2012 |
| Priority date | — |
| Expiry date | Oct 1, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/18
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Roller cone drill bits operable to form a borehole. A number of support arms may extend from each drill bit. A cutter cone assembly may be mounted on each support arm. A number of cutting elements or inserts may be disposed on an exterior surface of a cone assembly. A lifting surface may be formed on each support arm extending between a leading edge and a trailing edge of each support arm such that the lifting surfaces directs cuttings upward in a borehole. A wedge shaped portion may be formed on each support arm proximate the lifting surface and the trailing edge. An inlet to each lifting surface may be formed on the leading edge of each support arm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.