Rotary drag drilling device with variable depth of cut

A rotary-type drag bit for drilling a subterranean formation which comprises a bit body 400 configured for attachment to a downhole end of a drill string and comprised of a bit shank 402, a crown 404, a blade 22 movably secured to the bit body, a cutting element 25 secured to the bit body by the bla...

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Bibliographic Details
Main Author GORDON A TIBBITTS
Format Patent
LanguageEnglish
Published 01.10.2003
Edition7
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 rotary-type drag bit for drilling a subterranean formation which comprises a bit body 400 configured for attachment to a downhole end of a drill string and comprised of a bit shank 402, a crown 404, a blade 22 movably secured to the bit body, a cutting element 25 secured to the bit body by the blade and positioned to contact a formation, wherein the blade is attached and movable relative to the bit crown to provide a variable depth of cut by the cutting element, and further comprises an apparatus associated with the bit body for producing the variable depth of cut by the cutting element where the apparatus comprises a movable fastener 416 positioned through the blade and movable in response to an increase in pressure within the bit body.
Bibliography:Application Number: GB20030008541