Apparatus for creating pressure pulses in the fluid of a bore hole
US8693284B2 · kind B2 · utility
5Cited by
20References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 19, 2007 |
| Grant date | Apr 8, 2014 |
| Priority date | — |
| Expiry date | Nov 15, 2030 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/24
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus for creating pressure pulses in the fluid of a bore hole is described. The preferred embodiment takes the form of a mud pulser apparatus having a signalling valve controlled by a variable pilot valve. The forces on the signalling valve are balanced and controlled by the flow of mud through the variable orifice of the pilot valve. The arrangement is such as to act like a hydraulic amplifier, and results in the signalling valve being compensated for variable flow rates. In the preferred embodiment, the pilot valve has rotary vanes that allow it to be self-cleaning.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.