Reciprocating pulser for mud pulse telemetry

Details Reciprocating pulser for mud pulse telemetry Reciprocating pulser for mud pulse telemetry

2005-05-24

2008-08-26

Wong, Albert K. (Department: 2612)

Communications, electrical: acoustic wave systems and devices

Wellbore telemetering

Through well fluids

C367S081000, C367S083000, C175S040000

Reexamination Certificate

active

07417920

ABSTRACT:
A method of transmitting pressure pulses from a downhole location through a flowing fluid in a wellbore comprises using a linear actuator to controllably move a reciprocating member axially back and forth between a first position and a second position to at least partially obstruct flow of the flowing fluid to generate the pressure pulses. A reciprocating pulser for generating pressure pulses in a fluid flowing in a wellbore, comprises a fluid passage that allows flow of the fluid through the pulser, and a reciprocating member. A linear actuator is coupled to the reciprocating member, such that the linear actuator moves the reciprocating member in a first axial direction and then in a reverse direction to at least partially obstruct flow of the fluid through the pulser to generate pressure pulses in the flowing fluid.

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