Method and improvement to drilling tools comprising water passag

Details Method and improvement to drilling tools comprising water passag Method and improvement to drilling tools comprising water passag

1985-06-27

1988-03-29

Novosad, Stephen J.

Boring or penetrating the earth

Processes

Boring with specific fluid

175393, E21B 1018

Patent

active

047337346

ABSTRACT:
A method and a drilling tool are provided improving removal of spoil during drilling. The method allows the spoil to be removed from a drilling tool rotating, more especially on itself in operation, about a proper axis, or axis of the tool, said tool comprising a body a first end of which is adapted for connection to rotary drive means and the second end of which, said second end comprising water passages, defines the cutting face, the zone of said second end adjacent said axis is called central part of the tool, said tool comprises at least one nozzle. The method consists in positioning said nozzle in a water passage for producing a flow orientated towards the central part of the tool, and since the vector obtained by the orthogonal projection on a plane perpendicular to the axis of the tool of the speed of said flow in the central part of the tool is zero at any point of said central part, said vector will be qualified as effective speed vector.

REFERENCES:
patent: 2807444 (1957-09-01), Reitschneider
patent: 3220754 (1965-11-01), Mori
patent: 3746108 (1973-07-01), Hall
patent: 4296824 (1981-10-01), Kennington
patent: 4516642 (1985-05-01), Childers et al.
patent: 4540056 (1985-09-01), O'Hanlon

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