Rotating pulse valve for downhole fluid telemetry systems
An apparatus for generating pressure pulses in a drilling fluid in a drill collar section of a drill string is described comprising: rotating valve means substantially diametrically mounted in a drill string segment, said rotating valve means alternating between a first position corresponding to more resistance to the flow of drilling fluid and a second position corresponding to less resistance to the flow of drilling fluid, said rotating valve means being impelled by the flow of drilling fluid; and restraining means disposed in the drill collar segment, said restraining means restraining said rotating valve means in said first position and releasing said rotating valve means from said first position in response to control signals indicative of a downhole condition.
- Assignee:
- Teleco Oilfield Services Inc., Meriden, CT (United States)
- Patent Number(s):
- US 5215152; A
- Application Number:
- PPN: US 7-846523
- OSTI ID:
- 6483085
- Country of Publication:
- United States
- Language:
- English
Similar Records
Rotary acting shear valve for drilling fluid telemetry systems
Downhole fluid supercharger