Downlink pulser for mud pulse telemetry

Details Downlink pulser for mud pulse telemetry Downlink pulser for mud pulse telemetry

2007-07-31

2007-07-31

Hofsass, Jeffery (Department: 2612)

Communications: electrical

Wellbore telemetering or control

Using a specific transmission medium

C340S854400, C340S853100, C340S855400, C340S856400, C367S081000, C367S083000, C367S084000, C367S085000

Reexamination Certificate

active

10422440

ABSTRACT:
A mud pulse telemetry system comprises a surface located fluid supply line having a drilling fluid flowing therein. A non-venting pulser is disposed in the drilling fluid in the supply line, and the non-venting pulser is adapted to generate pressure fluctuations in the flowing drilling fluid. A downhole receiver in hydraulic communication with the non-venting pulser is adapted to detect the pressure fluctuations in the drilling fluid. A method for transmitting pressure signals from a surface location to a downhole location in a wellbore, comprises disposing a non-venting pulser in a surface located fluid supply line having a drilling fluid flowing therein. The non-venting pulser is actuated to generate pressure fluctuations in the flowing drilling fluid according to a predetermined encoding scheme. The pressure fluctuations are detected with a downhole receiver in hydraulic communication with the non-venting pulser.

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