Blade stabilizer provided with at least one fluid passage having a venturi effect, in particular for use in combination with a drill bit
US4245708A · kind A · utility
15Cited by
3References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 12, 1979 |
| Grant date | Jan 20, 1981 |
| Priority date | — |
| Expiry date | Feb 12, 1999 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B21/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A stabilizer for a tool, such as a rotary drill bit, comprises at least two blades spaced radially about the axis of the tool. Two adjacent blades define a venturi-shaped free angular space for a flow of drilling fluid. The width of each of the blades increases over at least a first portion, measured from the lower end of the blade, of the height of each blade. The height of the first portion is at least equal to one half of the width of the lower end of the free angular space.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.