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1. (WO2018009195) RECIPROCATING ROTARY VALVE ACTUATOR SYSTEM

Pub. No.:    WO/2018/009195    International Application No.:    PCT/US2016/041314
Publication Date: Fri Jan 12 00:59:59 CET 2018 International Filing Date: Fri Jul 08 01:59:59 CEST 2016
IPC: E21B 47/12
E21B 47/18
E21B 34/06
Applicants: HALLIBURTON ENERGY SERVICES, INC.
Inventors: DOUGLAS, Hugh
Title: RECIPROCATING ROTARY VALVE ACTUATOR SYSTEM
Abstract:
A system and method to for communicating with a telemetry tool by generating mud pressure waveforms is disclosed according to one or more embodiments. The system includes a rotor having a first bore spaced axially apart from a second bore and a blade disposed therebetween, a stator having a first and second component with a portion of each stator component disposed in a respective one of the first and second rotor bores, and an actuator having a tubular core wrapped with a winding and a plurality of magnets. The rotor blade includes a plurality of cutouts that may be aligned with a plurality of through bores disposed on each stator component when the rotor is in an open position. The core, winding, magnets, and rotor operate like a limited angle torque motor to electromagnetically produce torque by reciprocatingly rotating the rotor within an angle of rotation.