Systems and methods of forming subsurface wellbores

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United States of America Patent

PATENT NO 9129728
APP PUB NO 20100108379A1
SERIAL NO

12576751

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Abstract

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A system for forming a subsurface wellbore includes a rack and pinion system including a chuck drive system. The chuck drive system operates a drilling string. An automatic position control system includes at least one measurement sensor coupled to the rack and pinion system. The automatic position control system controls the rack and pinion system to determine a position of the drilling string.

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Patent Owner(s)

Patent OwnerAddress
SHELL OIL COMPANY900 LOUISIANA P O BOX 2463 HOUSTON TX 77252-2463

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Edbury, David Alston Reading, GB 8 245
MacDonald, Duncan Charles Houston, US 22 1591

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