Invention Grant
- Patent Title: Grapple attachment for use with drill pipes
- Patent Title (中): 钻头附件用于钻杆
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Application No.: US12201897Application Date: 2008-08-29
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Publication No.: US08146971B2Publication Date: 2012-04-03
- Inventor: Roger LaValley , Jason LaValley
- Applicant: Roger LaValley , Jason LaValley
- Applicant Address: US MN Bemidji
- Assignee: LaValley Industries, LLC
- Current Assignee: LaValley Industries, LLC
- Current Assignee Address: US MN Bemidji
- Agency: Hamre, Schumann, Mueller & Larson, P.C.
- Main IPC: B66C1/42
- IPC: B66C1/42 ; E21B19/20

Abstract:
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.
Public/Granted literature
- US20090057019A1 GRAPPLE ATTACHMENT FOR USE WITH DRILL PIPES Public/Granted day:2009-03-05
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