Pipe alignment apparatus for use on wellhead derrick

Material or article handling – Well pipe or rod racking mechanism

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Details

175 85, E21B 1916

Patent

active

056094574

ABSTRACT:
An alignment apparatus for use on a well derrick or drilling rig for engagement with a pipe section either being connected to or disengaged from the upper end of pipe string within a well bore hole. The apparatus includes a supporting frame for connection to the framework of the derrick and carrying a head assembly for engaging an upper pipe section in a manner to align the pipe section with a pipe section within the bore hole and yet allowing rotation of the upper pipe section. The head assembly includes a fixed pipe engaging member and movable arms pivotable to a closed position, the pipe engaging member and the arms all having pipe engaging surfaces. Adjustment mechanisms are provided to accomplish positioning of the fixed pipe engaging member and the arms so that the pipe engaging surfaces of the member and the arms can be selected whereby the surfaces are each spaced from the aligned central axis of the pipe section a distance slightly greater than the radius of the outside diameter of the pipe when the arms are moved to a closed position. The apparatus is capable of quick and accurate alignment of pipe sections and may be readily adjusted to permit use with a variety of sizes of pipes.

REFERENCES:
patent: Re30071 (1979-08-01), Hilding
patent: 2416815 (1947-03-01), Calhoun
patent: 2450934 (1948-10-01), Calhoun
patent: 2828024 (1958-03-01), True
patent: 3061011 (1962-10-01), Paget
patent: 4030746 (1977-06-01), Langowski
patent: 4274777 (1981-06-01), Scaggs
patent: 4295527 (1981-10-01), Russe
patent: 4304433 (1981-12-01), Langowski
patent: 4440536 (1984-04-01), Scaggs
patent: 4652195 (1987-03-01), McArthur
patent: 4681158 (1987-07-01), Pennison
patent: 5127790 (1992-07-01), Teague
"Penniyoke Tubular Alignment Tool", Weatherford Tubular Services, .COPYRGT.1990.

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