Method and apparatus for cleaning a borehole

Details Method and apparatus for cleaning a borehole Method and apparatus for cleaning a borehole

1993-02-12

1994-12-27

Dang, Hoang C.

Boring or penetrating the earth

Enlargement of existing pilot throughbore requiring...

175 62, 175 69, 175102, 175215, 175324, E21B 728

Patent

active

053756690

ABSTRACT:
A method and apparatus for removing drilling mud within entrained cuttings is provided using a pump for forcing fluid into a borehole, such that the fluid mixes with cuttings formed during the formation of the hole. The pipe receives the fluid and entrained cuttings at a first end of the pipe and returns the fluid and entrained cuttings to the surface at the second end of the pipe. At the first end of the pipe, air is injected into the drilling fluid with entrained cuttings to form bubbles therein, thereby increasing the velocity of the fluid and entrained cuttings through the pipe. In one alternative embodiment, a suction is provided at one end of the pipe to increase the speed of fluid and entrained cuttings therethrough. In a third embodiment of the present invention, an Archimedes screw is used to remove the fluid and entrained cuttings from the borehole.

REFERENCES:
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patent: 4508389 (1985-04-01), Hodges
patent: 5096002 (1992-03-01), Cherrington
patent: 5269384 (1993-12-01), Cherrington

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