DRILLING APPARATUS USING A SEALED SELF-ADJUSTING DEFLECTION DEVICE FOR DRILLING DIRECTIONAL WELLS

An apparatus for drilling directional wellbores is disclosed that in one non-limiting embodiment incudes a drive for rotating a drill bit, a deflection device that enables a lower section of a drilling assembly to tilt about a member of the deflection device within a selected plane when the drilling...

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Bibliographic Details
Main Authors PETERS, Volker, GRIMMER, Harald, FULDA, Christian, PETER, Andreas, EGGERS, Heiko
Format Patent
LanguageEnglish
French
German
Published 06.09.2023
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:An apparatus for drilling directional wellbores is disclosed that in one non-limiting embodiment incudes a drive for rotating a drill bit, a deflection device that enables a lower section of a drilling assembly to tilt about a member of the deflection device within a selected plane when the drilling assembly is substantially rotationally stationary to allow drilling of a curved section of the wellbore when the drill bit is rotated by the drive and wherein the tilt is reduced when the drilling assembly is rotated to allow drilling of a straighter section of the wellbore, and at least one seal that isolates at least a surface of the member from outside environment. The at least one seal is lubricated by a sealed hydraulic unit
Bibliography:Application Number: EP20170853860