Grapple attachment for use with drill pipes

A grapple attachment for use with a drill pipe having a diameter, that may include first and second gripping members disposed on a rigid lateral member tiltable up to 40 degrees from the horizontal and preferably continuously rotatable, wherein each of the first and second gripping members has a fir...

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Bibliographic Details
Main Authors LAVALLEY JASON, LAVALLEY ROGER
Format Patent
LanguageEnglish
Published 03.04.2012
Subjects
CRANES
EARTH DRILLING
EARTH DRILLING, e.g. DEEP DRILLING
FIXED CONSTRUCTIONS
HAULING
HOISTING
LIFTING
LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS,WINCHES, OR TACKLES
MINING
OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
PERFORMING OPERATIONS
TRANSPORTING
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Summary:A grapple attachment for use with a drill pipe having a diameter, that may include first and second gripping members disposed on a rigid lateral member tiltable up to 40 degrees from the horizontal and preferably continuously rotatable, wherein each of the first and second gripping members has a first and second claw and a bracket having a concave contact surface, each claw having a concave gripping surface, wherein the surface of the bracket and the gripping surfaces of the first and second claws come in contact with the drill pipe when the gripping member is in the closed position.
Bibliography:Application Number: US20080201897