Assembly for directional drilling of boreholes

Details Assembly for directional drilling of boreholes Assembly for directional drilling of boreholes

1988-01-25

1989-11-14

Dang, Hoang C.

Boring or penetrating the earth

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

Normally curved guide or shaft

175 76, 175107, 175325, E21B 402, E21B 708, E21B 1710

Patent

active

048800660

ABSTRACT:
A directional drilling assembly comprises a downhole drilling motor and stabilizer assembly which stabilizes the drilling assembly in such a manner in the borehole that the drilling bit driven by the output shaft of the downhole motor has a tilted orientation in the borehole. The stabilizer assembly comprises a lowermost stabilizer which is connected to the output shaft of the motor so as to suppress any sticking tendency of said lowermost stabilizer to the borehole wall.

REFERENCES:
patent: 2890859 (1959-06-01), Garrison
patent: 3561549 (1971-02-01), Garrison et al.
patent: 3999901 (1976-12-01), Tschirky
patent: 4011917 (1977-03-01), Tiraspolsky et al.
patent: 4040495 (1977-08-01), Kellner et al.
patent: 4436168 (1984-03-01), Dismukes
patent: 4465147 (1984-08-01), Feenshe et al.
patent: 4485879 (1984-12-01), Kamp et al.
patent: 4492276 (1985-01-01), Kamp
patent: 4667751 (1987-05-01), Geczy et al.
patent: 4697651 (1987-10-01), Dellinger
patent: 4739842 (1988-04-01), Kruger et al.

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