Method and apparatus for moulding protective tubing simultaneous

Details Method and apparatus for moulding protective tubing simultaneous Method and apparatus for moulding protective tubing simultaneous

1974-06-25

1976-02-03

Purser, Ernest R.

Boring or penetrating the earth

With heating or cooling drilling fluid

61 41A, 61 84, 166295, 166288, 175 72, 175 50, 175171, 61 722, E21B 700

Patent

active

039359107

ABSTRACT:
In a method of drilling a bore-hole, the bore-hole is protected against caving in as the drilling proceeds by the simultaneous moulding of a tubing on the bore-hole wall immediately above the drill tool. Preferably a sleeve is first moulded onto the bore-hole wall and the tubing is moulded onto the sleeve.

REFERENCES:
patent: 512037 (1894-01-01), Kraus
patent: 978359 (1910-12-01), Cooper
patent: 1351137 (1920-08-01), Sheen
patent: 2609052 (1952-09-01), Kanzer
patent: 2946578 (1960-07-01), Smaele
patent: 3126959 (1964-03-01), Ortloff
patent: 3255833 (1966-06-01), Kerr
patent: 3328971 (1967-07-01), Boessner
patent: 3444279 (1969-05-01), Dost
patent: 3788087 (1974-01-01), Patin

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