ROCK BIT WITH VECTORED HYDRAULIC NOZZLE RETENTION SLEEVES

A drill bit for drilling through an earthen formation to form a borehole. In an embodiment, the drill bit comprises a bit body having a central axis, an internal plenum, and an underside. The underside includes an annular outer region. The bit body includes an outer receptacle extending from the ple...

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Bibliographic Details
Main Authors TEDESCHI LUCA, PORTWOOD GARY, LARSEN JAMES L
Format Patent
LanguageEnglish
Published 25.06.2009
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 drill bit for drilling through an earthen formation to form a borehole. In an embodiment, the drill bit comprises a bit body having a central axis, an internal plenum, and an underside. The underside includes an annular outer region. The bit body includes an outer receptacle extending from the plenum to the outer region. In addition, the drill bit comprises a first and a second cone cutter. Each cone cutter comprises an outer region distal the bit axis. Further the drill bit comprises an outer sleeve having an upstream end received by the outer sleeve receptacle and a through passage. The through passage includes an upstream section having an upstream axis and a downstream section having a downstream axis that is skewed at an angle alpha relative to the upstream axis. A projection of the downstream axis passes between the outer regions of the first and second cone cutters.
Bibliography:Application Number: US20080104856