MUD PULSER WITH HIGH SPEED, LOW POWER INPUT HYDRAULIC ACTUATOR

摘要

A method of modulating information on pressure fluctuations transmitted via a tubular string can include applying pressure to a piston, thereby axially displacing the piston, axially displacing and rotating an intermediate sleeve in response to the piston displacement, rotating an output member in response to the axial displacement and rotation of the intermediate sleeve, and rotating a variable flow restrictor rotor relative to a stator, the rotor being connected to the output member. A mud pulser can include a variable flow restrictor, and an actuator which operates the flow restrictor and modulates information on pressure fluctuations produced by the flow restrictor, the actuator including a piston which displaces axially in response to a pressure differential, an intermediate sleeve which is both rotated and displaced axially by the piston, and an output member which is rotated by both rotation and axial displacement of the intermediate sleeve.

主权项

1. A mud pulser for use with a subterranean well, the mud pulser comprising:
a variable flow restrictor which restricts flow through the mud pulser; and an actuator which operates the variable flow restrictor and modulates information on pressure fluctuations produced by the variable flow restrictor, the actuator including a piston which displaces axially in response to a pressure differential across the piston, an intermediate sleeve which is both rotated and displaced axially by the piston displacement, and an output member which is rotated by both rotation and axial displacement of the intermediate sleeve.