Drilling system and method of pulling it up

Details Drilling system and method of pulling it up Drilling system and method of pulling it up

1974-09-23

1976-04-27

Brown, David H.

Boring or penetrating the earth

Processes

Boring with specific fluid

175103, 175107, 175203, E21B 718, E21B 312

Patent

active

039528162

ABSTRACT:
A drilling system includes a drill pipe and a cutting means located therein. A locking mechanism with said drill pipe is provided on said cutting means and is operatively connected with a spearhead engageable with an engaging mechanism of a pulling-up device so that, when the spearhead is pulled, an inner tube and outer tube forming a part of the locking mechanism may move relative to each other to unlock the drill pipe and cutting means for quickly and easily pulling up the latter.

REFERENCES:
patent: 2016067 (1935-10-01), Bannister
patent: 2865602 (1958-12-01), Whittle
patent: 3036646 (1962-05-01), Eckel et al.
patent: 3077937 (1963-02-01), Tirespolsky et al.
patent: 3353612 (1967-11-01), Bannister

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