Directional drilling system

Details Directional drilling system Directional drilling system

1976-03-22

1977-04-05

Purser, Ernest R.

Boring or penetrating the earth

Processes

Boring curved or redirected bores

175 45, 175 73, 175 76, E21B 704

Patent

active

040156737

ABSTRACT:
This invention concerns the drilling of boreholes in the earth. It concerns a rotary drilling system having a particular bottom hole assembly (BHA) for use in increasing or decreasing the angle of deviation from the vertical of a borehole. It also teaches a method whereby the angle of deviation can be calculated for each assembly. There is one assembly disclosed for increasing the angle of deviation and another assembly disclosed for decreasing the angle of deviation. Also disclosed is a novel "universal stabilizer" for use in the bottom hole assembly.

REFERENCES:
patent: 2646253 (1953-07-01), Johnston
patent: 2646254 (1953-07-01), Johnston
patent: 2829864 (1958-04-01), Knapp
patent: 3229375 (1966-01-01), Crake et al.
patent: 3799277 (1974-03-01), Kellner
patent: 3878903 (1975-04-01), Cherington

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