Annular drilling device

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United States of America Patent

PATENT NO 9540898
SERIAL NO

14719120

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Abstract

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An annular drilling device is provided that employs an active or passive, stationary sealing element. The sealing element is made of a low-friction material that contacts the drill pipe and creates a seal.

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Patent Owner(s)

Patent OwnerAddress
SUNSTONE TECHNOLOGIES LLC101 NORTH ROBINSON SUITE 800 OKLAHOMA CITY OK 73102

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hughes, William James Highland Ranch, US 35 653

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