Ground drilling tool

Details Ground drilling tool Ground drilling tool

2007-08-14

2007-08-14

Thompson, Kenneth (Department: 3672)

Boring or penetrating the earth

Below-ground impact members

C175S401000, C175S415000

Reexamination Certificate

active

10764659

ABSTRACT:
A back bit (20) is disclosed which is to used in conjunction with drilling equipment (10) which may include a derrick (11), a drilling pipe (12), a back head (14), a starting rod (13), and a cutting bit (15) mounted to the lower end of the starting rod. The back bit has a tubular body (21) with a plurality of upwardly extending cutting teeth (22).

REFERENCES:
patent: 1899728 (1933-02-01), Sandstone
patent: 2221242 (1940-11-01), McCielland
patent: 2234454 (1941-03-01), Richter
patent: 2288124 (1942-06-01), Creighton
patent: 2425012 (1947-08-01), Synder
patent: 2495073 (1950-01-01), Morris
patent: 2738165 (1956-03-01), McNatt
patent: 2790623 (1957-04-01), Pate et al.
patent: 3313364 (1967-04-01), Binkley
patent: 3399741 (1968-09-01), Monroe
patent: 3480094 (1969-11-01), Morris
patent: 3837414 (1974-09-01), Swindle
patent: 4986375 (1991-01-01), Maher

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