Drilling technique

Details Drilling technique Drilling technique

1976-10-22

1977-08-16

Leppink, James A.

Boring or penetrating the earth

Bit or bit element

Unsupported abrading particle type

175207, 175394, E21B 716

Patent

active

040420485

ABSTRACT:
There is disclosed a technique for drilling a well bore in which a slurry of drilling fluid and pellets is pumped through the drill pipe into a drill head. The pellets exit from the drill head and are captivated between the drill head and the bore hole. Upon rotation of the drill head, the pellets shot drill the bottom and side wall of the bore hole.

REFERENCES:
patent: 1343902 (1920-06-01), Chapman
patent: 1420365 (1922-06-01), Chapman
patent: 1452734 (1923-04-01), Griesche
patent: 2013070 (1935-09-01), Sheridan
patent: 2276075 (1942-03-01), Wuensch
patent: 2441881 (1948-05-01), Hays
patent: 2553701 (1951-05-01), Comstock
patent: 2576283 (1951-11-01), Chaney
patent: 3132852 (1964-05-01), Dolbear

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