Drilling tool

Details Drilling tool Drilling tool

1995-09-11

1997-02-11

Neuder, William P.

Boring or penetrating the earth

Means traveling with tool to constrain tool to bore along...

Normally curved guide or shaft

175 61, E21B 708

Patent

active

056011512

ABSTRACT:
A hole opener comprising: a cylindrical section of pipe; a nose; a plurality of cutting elements that extend radially from the pipe and that produce a lateral force on the hole opener in response to the rotation of the hole opener in the borehole; lower reaction pad means, extending radially from the pipe section to trail behind the cutting elements and located generally below the cutting elements, for continuously contacting the borehole wall during rotation of the hole opener and for receiving reactive forces that are in response to the lateral force; and upper reaction pad means, extending radially from the pipe section to trail behind the cutting elements and located generally above the cutting elements, for continuously contacting the borehole wall during rotation of the hole opener and for receiving reactive forces that are in response to the lateral force.

REFERENCES:
patent: 1332841 (1920-03-01), Jansen
patent: 3851719 (1974-12-01), Thompson et al.
patent: 4231437 (1980-11-01), Swersky et al.
patent: 4449595 (1984-05-01), Holbert
patent: 4523652 (1985-06-01), Schuh
patent: 5012863 (1991-05-01), Springer
patent: 5213168 (1993-05-01), Warren et al.

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