Vertically adjustable pipe racking apparatus

Details Vertically adjustable pipe racking apparatus Vertically adjustable pipe racking apparatus

1975-06-24

1976-09-07

Spar, Robert J.

Boring or penetrating the earth

Below-ground impact members

With releasable means to detachably retain telescoping...

175 85, 214 1P, E21B 1900

Patent

active

039789934

ABSTRACT:
A multi-stage, well-drilling mast assembly, particularly adapted to mobile drilling platforms, such as drilling vessels, the assembly having a main stage mast and an auxiliary mast, both pivoted to the platform for swinging movements between horizontal and vertical positions. The main stage carries well pipe hoisting equipment, and the auxiliary stage carries rack equipment for vertically storing well pipe, and racker equipment for moving the well pipe between the rack and the center line of the mast assembly. The racker equipment includes an upper racker arm and a lower racker arm, the lower racker arm being vertically adjustable and having a vertically moveable head.

REFERENCES:
patent: 3280920 (1966-10-01), Scott
patent: 3561811 (1971-02-01), Turner

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