Method and improvement to drilling tools allowing great efficiency in cleaning the cutting face
US4738320A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jun 27, 1985 |
| Grant date | Apr 19, 1988 |
| Priority date | — |
| Expiry date | Jun 27, 2005 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/60
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method and improvement to drilling tools efficient cleaning of the cutting face. The method improves the removal of cuttings from a drilling tool rotating, more especially on itself in operation, about the axis of the tool, said tool comprising a body having a first end adapted for connection to rotary drive means and the second end defining a cutting face. The zone of said second end adajcent said axis is designated as the central part of the tool and said tool comprises at least one nozzle. The method consists in positioning said nozzles so as to produce a flow orientated towards the central part of the tool, the vector obtained by the orthogonal projection on a plane perpendicular to the axis of the tool of the speed of said flow in the central part of the tool being zero at any point of said central part, said vector forming the effective speed vector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.