Wells – Processes – Assembling well part
Patent
1996-05-01
1998-05-26
Tsay, Frank
Wells
Processes
Assembling well part
166 7751, 175202, E21B 1906
Patent
active
057552894
ABSTRACT:
An elevator mechanism for use on drilling rigs for hoisting and lowering different sizes and types of pipe. At least two elevator frame sections are interconnected in relative moveable relation for movement between an open position for receiving a section of pipe and a closed position clamping about the pipe. At least two pipe clamping inserts being received in interengaged relation by respective elevator frame sections in a manner resisting upward and downward movement relative to the frame sections. The pipe clamping inserts are mechanically interengaged with the elevator sections to prevent inadvertent disassembly downward and are releaseably locked to secure the inserts against rotation relative to the frame sections. For assembly and disassembly of the inserts relative to the frame sections, the inserts, when unlocked, are rotated for engagement or separation of the mechanically interengaged relation.
REFERENCES:
patent: 4304310 (1981-12-01), Garrett
patent: 4450606 (1984-05-01), Broussard
patent: 4511169 (1985-04-01), Willis
patent: 4647099 (1987-03-01), Berry et al.
patent: 4650236 (1987-03-01), Haney et al.
patent: 4791997 (1988-12-01), Krasnov
patent: 4793422 (1988-12-01), Krasnov
patent: 5297833 (1994-03-01), Willis
Angman Per G.
Lutzhoft Jens
Ulbrich Hans-Jurgen
Tesco Corp
Tsay Frank
LandOfFree
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