Novel rotary drill bits and drilling process

Details Novel rotary drill bits and drilling process Novel rotary drill bits and drilling process

1980-03-10

1982-11-16

Purser, Ernest R.

Boring or penetrating the earth

Bit or bit element

With fluid conduit lining or element

175 67, E21B 1060

Patent

active

043591159

ABSTRACT:
A rotary drilling bit is provided which includes means for providing a protective stream of a high pressure fluid for its cutting edges fed parallel to the drilling axis directed perpendicular to the cutting edges. The drilling bit also includes means for providing a stream of low pressure fluid for flushing away pulverized rock cut by the drilling bit. The drilling bit is mounted on the end of boring tubing made up of a pair of coaxially positioned tubings, the innermost one supplies the high pressure fluid and the outermost one supplies the low pressure fluid. A drilling process which employs the drilling bit and boring tubing efficiently drills through both soft and non-abrasive rock and hard or abrasive rock.

REFERENCES:
patent: 880880 (1908-03-01), Hardsocg
patent: 1297708 (1919-03-01), Maier
patent: 1388490 (1921-08-01), Suman
patent: 1465407 (1923-08-01), Bashara
patent: 1882268 (1932-10-01), Appleman
patent: 2822148 (1958-02-01), Murray
patent: 3096103 (1963-07-01), Murphy
patent: 3155180 (1964-11-01), MacSween
patent: 3645346 (1972-02-01), Miller et al.
patent: 3881561 (1975-05-01), Pols et al.
patent: 4073351 (1978-02-01), Baum

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