DRIVEN ROTARY STEERING SYSTEM HAVING A VARIABLE-ORIFICE VALVE

The disclosed embodiments include systems and methods to improve downhole drilling. A representative system may include a rotary steering tool having a plurality of hydraulically actuated steering pad assemblies, a fluid outlet, and a variable-orifice valve positioned within a primary flow channel o...

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Bibliographic Details
Main Authors NANAYAKKARA, Ravi, DEOLALIKAR, Neelesh, V
Format Patent
LanguageEnglish
French
German
Published 18.11.2020
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:The disclosed embodiments include systems and methods to improve downhole drilling. A representative system may include a rotary steering tool having a plurality of hydraulically actuated steering pad assemblies, a fluid outlet, and a variable-orifice valve positioned within a primary flow channel of the rotary steering tool, downhole from the steering pad assemblies, and uphole from a drill bit. The valve comprises a valve port having a variable-area orifice that can be controllably varied to dynamically adjust the magnitude of a pressure drop from a tool bore to a wellbore annulus formed by the inner boundary of the wellbore and an outer boundary of the tool.
Bibliography:Application Number: EP20180911857