Fluid driven siren pressure pulse generator for MWD and flow measurement systems
US5636178A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 27, 1995 |
| Grant date | Jun 3, 1997 |
| Priority date | — |
| Expiry date | Jun 27, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K7/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A fluid-powered siren of the type used for communicating information between points of a wellbore. In one aspect, responsiveness of the siren's rotor to low flow rates is improved through application of greater torque to the siren rotor. Also, improved capturing and channeling action by the turbine rotor fins causes fluid flow to drive the turbine rotor and siren rotor combination more efficiently than it can drive a siren rotor directly as may be the case in other fluid-powered sirens. In another aspect, the system provides for control of the rotational speed of the siren rotor in instances wherein the fluid flow rate is too high. Control is affected by use of an epicyclical gear reducer which is positioned between the turbine rotor and the siren rotor to operably interconnect the two components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.