Low cutter load raise head

Details Low cutter load raise head Low cutter load raise head

1979-08-27

1981-03-31

Leppink, James A.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175 53, E21B 1028

Patent

active

042588057

ABSTRACT:
A raise head having a multiplicity of cutters for enlarging a pilot hole into a larger diameter hole by disintegrating the earth formations that surround the pilot hole is provided that will require lower cutter loads to penetrate the formations being bored by directing the rock fracture planes toward the pilot hole forcing the rock to yield with less input energy. The cutters are positioned on the raise head to provide an earth formation contact profile with a major portion of said earth formation contact profile extending outward and upward from said pilot hole. The included angle between the major portion of the earth formation contact profile and the axis of the pilot hole is less than 90.degree..

REFERENCES:
patent: 1745567 (1930-02-01), Cross et al.
patent: 1841302 (1932-01-01), Simmons
patent: 2837324 (1958-06-01), Aschacker
patent: 2868510 (1959-01-01), Dean
patent: 3379264 (1968-04-01), Cox
patent: 3633691 (1972-01-01), Talbert
patent: 3750767 (1973-08-01), Pessier
patent: 3995706 (1976-12-01), White

Affiliated with

Also associated with

Rating

Low cutter load raise head does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Low cutter load raise head, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low cutter load raise head will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2238748