Drilling equipment

Details Drilling equipment Drilling equipment

1975-02-13

1976-05-25

Leppink, James A.

Boring or penetrating the earth

Boring without earth removal

Fluid passage to exterior of drive point

175 23, 175171, 175318, E21B 3304, E21B 1102

Patent

active

039586480

ABSTRACT:
Improved sealing means in rock drilling equipment of the kind comprising casing sections positioned between the drilling unit and the cutter head and housing the drill rod sections. A combined seal consisting of a metal part and a resilient part is positioned between the casing and the cutter head to prevent water and mud from penetrating into the casing. In addition, sealing means are provided to prevent drill water from flowing between the drill rod and the casing in the direction towards the drill chamber, and further means are provided to close off communication between the drill chamber and the annular chamber between the casing and the drill hole wall.

REFERENCES:
patent: 672097 (1901-04-01), Eastman
patent: 999000 (1911-07-01), Trippe
patent: 2475429 (1949-07-01), Humason
patent: 2641444 (1953-06-01), Moon
patent: 2670180 (1954-02-01), Ranney
patent: 2784942 (1957-03-01), Peck et al.
patent: 3115755 (1963-12-01), Siebenhausen
patent: 3390730 (1968-07-01), Techy et al.
patent: 3605922 (1971-09-01), Bergeron et al.
patent: 3656564 (1972-04-01), Brown
patent: 3732143 (1973-05-01), Joosse

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