Casing hammer power swing-out apparatus for drilling rig

Details Casing hammer power swing-out apparatus for drilling rig Casing hammer power swing-out apparatus for drilling rig

2011-04-12

2011-04-12

Neuder, William P (Department: 3672)

Boring or penetrating the earth

With above-ground means to impact an earth-penetrating means

C175S161000, C173S089000

Reexamination Certificate

active

07921940

ABSTRACT:
A swing-out apparatus for a drill rig, typically for drilling water wells. It includes a sled which is formed to be driven vertically on a drill mast of a vehicle carrying the sled, a casing hammer, and a hinge securing the casing hammer on the sled. To provide for displacement of the casing hammer relative to the sled, a drive is provided for swinging the casing hammer on the hinge from a deployed position to an inactive position. The drive comprises a motor connected for driving one relative to another.

REFERENCES:
patent: 2217674 (1940-10-01), Curtis
patent: 4405020 (1983-09-01), Rassieur
patent: 2003/0024713 (2003-02-01), Han et al.

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