Drilling system using weight of mud

Details Drilling system using weight of mud Drilling system using weight of mud

1975-05-28

1976-05-25

Leppink, James A.

Boring or penetrating the earth

With means providing pressurized gas contact with drilling...

175212, C09K 700, E21B 2100

Patent

active

039586502

ABSTRACT:
A drill system for drilling very large holes in the earth, of diameters up to from 10 to 20 feet, by means of a rotary bit carrying a plurality of cutters, wherein the bit assembly is pressed against the bottom of the hole, so that the unit pressure against each of the cutters will be adequate for their optimum performance. The force holding the bit in contact with the bottom of the hole is created by the weight of the drilling liquid on top of the bit. A fluid seal is maintained between the outer edge of the bit and the wall of the bore hole. Liquid flows down the annulus around the drill pipe and through a plurality of orifices in the bit, terminating at the bit cutters. Rock cuttings are washed radially inwardly to a central drill pipe, which supports the bit, and through which torque is applied to the bit. The pressure drop in the orifices serves to create a differential pressure above and below the bit. The differential pressure times the exposed surface area of the bit provides the hold down force. Cuttings are lifted out of the central drill pipe by means of a smaller diameter pipe lowered inside of the drill pipe, through which compressed air is applied.

REFERENCES:
patent: 1428788 (1922-09-01), Larsen
patent: 2329330 (1943-09-01), Brailey
patent: 2914306 (1959-11-01), Failing
patent: 3151690 (1964-10-01), Grable
patent: 3420321 (1969-01-01), Botto
patent: 3431989 (1969-03-01), Waterman
patent: 3841421 (1974-10-01), Matsushita

Affiliated with

Also associated with

Rating

Drilling system using weight of mud does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Drilling system using weight of mud, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drilling system using weight of mud will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-899032