Boring or penetrating the earth – With tool drive prime mover or above-ground mechanical... – Rotary drive for a relatively advancing tool
Patent
1986-06-18
1988-07-05
Leppink, James A.
Boring or penetrating the earth
With tool drive prime mover or above-ground mechanical...
Rotary drive for a relatively advancing tool
285362, 285912, E21B 304
Patent
active
047548207
ABSTRACT:
A drilling head with an upper body assembly removably clamped onto a stationary spool via a bayonet-type coupler clamp rotated into clamped and unclamped positions by a remote controlled hydraulic motor connected to the clamp by a ring and pinion gear. The upper body assembly has a kelly bushing, a corrugated drive bushing rotatable with the kelly bushing, a drive ring rotatable with the drive bushing a bearing assembly surrounding the drive ring, and an elastomeric stripper connected to the drive ring for rotation therewith. The stripper is adapted for sealing engagement with a rotating kelly drive which slides down through the drilling head. Quick connect/disconnect lubrication fittings on the clamp and upper body assembly are releasably mated upon rotation of the clamp to the clamped position to provide lubrication from a single lubrication line to both the bearing assembly and seals via passageways formed in the outer body of the upper body assembly.
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Grant Oil Tool Company, Bulletin 86, entitled "Grant Rotating Drilling Heads".
Dodd Eric G.
Watts James T.
Dang Hoang C.
Drilex Systems, Inc.
Leppink James A.
Redman Leon E.
Sutherland Malcolm L.
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