Pulser cycle sweep method and device

A servo valve in a servo pulser used to restrict flow to a larger main valve includes external stops on a housing to define rotational starting / stopping points and sweep zones for a servo rotor having digits for contacting the stops. The digits extend longitudinally away from the servo valve seat...

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Bibliographic Details
Main Authors Manoj Gopalan, Robert Weber
Format Patent
LanguageEnglish
Published 28.08.2024
Subjects
EARTH DRILLING
EARTH DRILLING, e.g. DEEP DRILLING
FIXED CONSTRUCTIONS
MINING
OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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Summary:A servo valve in a servo pulser used to restrict flow to a larger main valve includes external stops on a housing to define rotational starting / stopping points and sweep zones for a servo rotor having digits for contacting the stops. The digits extend longitudinally away from the servo valve seat and extend into the sweep zones. Interaction between the stops and the digits in the sweep zones limit rotation of the rotor to a swept arc between the stops. The servo pulser rotor oscillates between stopping points in alternating clockwise / counterclockwise sweeps. Each sweep in a given direction creates one full pulse: closed, open, and closed. The servo pulser carries out a feedback / decision loop between hydraulic pulses (and sweeps) that receives information on one or more previous pulses and calculates how fast or slow it should drive the servo rotor for the current pulse.
Bibliography:Application Number: GB20240007224