Drilling tool with an exchangeable feed helix

Details Drilling tool with an exchangeable feed helix Drilling tool with an exchangeable feed helix

1987-10-02

1989-08-01

Massie, IV, Jerome W.

Wells

Valves, closures or changeable restrictors

Fluid operated

166321, 408226, E21B 1062

Patent

active

048526703

ABSTRACT:
The drilling tool proposed serves for making perforations and is equipped with an exchangeable feed helix. To prevent the feed helix from being damaged if the drilling tool becomes tilted or if the feed helix is jammed, the feed helix can execute a specific stroke by means of a supporting spring, in such a way that the drill shank can rotate freely relative to the feed helix.

REFERENCES:
patent: 2116359 (1938-05-01), McCann
patent: 2438637 (1948-03-01), Jansen
patent: 4393947 (1983-07-01), Lutze et al.
patent: 4484642 (1984-11-01), Evans

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