Inclined-jet drilling tool
US4886131A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1988 |
| Grant date | Dec 12, 1989 |
| Priority date | — |
| Expiry date | Aug 31, 2008 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/18
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A drilling tool including cutting teeth carried by rollers or conically-shaped wheels, with an irrigation arrangement being provided for delivering at least one irrigation fluid jet through a calibrated orifice. A center of the fluid jet at an outlet of the orifice is disposed at a distance from a plane perpendicular to an axis of the tool passing through an apex of the teeth of the drilling tool as viewed from a working face of the drilling tool. A magnitude of the tool diameter, height of the teeth, and distance are determined in accordance with the following relationships: EQU d>1.8 H and EQU 0.125D<d<0.185 D where: PA0 d=a distance between a center of the outlet orifice of a plane perpidencular to the tool axis and passing through tips of the teeth nearest to the working face of the drilling tool; PA0 H=a height of the teeth of the drilling tool; and PA0 D=a diameter of the drilling tool.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.