Boring or penetrating the earth – With below-ground tool drive prime mover
Patent
1975-04-01
1976-03-23
Brown, David H.
Boring or penetrating the earth
With below-ground tool drive prime mover
175171, 175257, E21B 106, E21B 312, E21B 500
Patent
active
039454444
ABSTRACT:
An apparatus adapted for drilling earth formations, earth structures or the like essentially embodies an outer tubular means, hollow drill bit means, hammer assembly mechanism, and a rupturable interconnection means. The outer means is rotatable and axially movable having a drilling end insertable within the earth. Connected adjacent the drilling end is the hollow drill bit means which is conjointly rotatable with the outer means. Such outer drill bit means has an anvil impact shoulder formed on the interior surface thereof. The inner drill bit means is located within the outer member and is arranged, in a preferred embodiment, to be conjointly rotatable therewith. A percussion shoulder is integrally formed on the inner drill bit means and is arranged to selectively impact the anvil impact shoulder. The hammer assembly mechanism includes a selectively reciprocally movable hammer within the outer means for intermittently imparting mechanical impulses to the inner drill bit means and the hollow drill bit means through the percussion shoulder to the anvil impact shoulder for downwardly driving the hollow drill bit means and the inner drill bit means. The rupturable interconnection means also serves to rotatably interconnect the hollow drill bit means to the inner drill bit, as well as prevent the inner drill bit means from being forced inwardly or outwardly with respect to the outer means in response to repeated hammerings by the hammer. Additionally, the rupturable means is selected to be rupturable whenever the inner drill bit means and hammer mechanism are pulled upwardly with respect to the outer means by a force sufficient to separate the hollow drill bit means from the inner drill bit means.
REFERENCES:
patent: 3180433 (1965-04-01), Mason
patent: 3409081 (1968-11-01), Brown
patent: 3682260 (1972-08-01), Klemm
patent: 3732143 (1973-05-01), Joosse
patent: 3835943 (1974-09-01), Bray
patent: 3854539 (1974-12-01), Sweeney
Brown David H.
The Anaconda Company
LandOfFree
Split bit casing drill does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Split bit casing drill, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Split bit casing drill will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1637852