Opening device for drill rods for an extension rod drilling equi

Details Opening device for drill rods for an extension rod drilling equi Opening device for drill rods for an extension rod drilling equi

1986-09-26

1988-01-26

Bell, Paul A.

Tool driving or impacting

Means to drive tool about an axis

Means to hold and relatively rotate sections of tool shaft

81 5716, E21B 300

Patent

active

047211717

ABSTRACT:
An opening device for drill rods for an extension rod drilling equipment, which device comprises a drilling machine (2) displaceable along a feeding beam (1), a stationary drill rod retaining centralizer (3) positioned on the drilling axis (A) for the drill rod, and a drill rod gripping centralizer (4) positioned between the retaining centralizer and the drilling machine. In order to speed up the disconnection of the drill rods, and in order to simplify the structure, the retaining centralizer is provided with a rotating mechanism (15) for the rotation thereof and the gripping centralizer is connected to an actuating device (22) for the displacement thereof in the direction of a drilling axis (A).

REFERENCES:
patent: 3832918 (1974-09-01), Lang et al.
patent: 3851714 (1974-12-01), Visser et al.
patent: 4445402 (1984-05-01), Farr et al.
patent: 4497224 (1985-02-01), Jurgens
patent: 4591005 (1986-05-01), Paivalainen et al.

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