Reverse circulation bit apparatus

Boring or penetrating the earth – With means movable relative to tool or shaft to control... – Valve prevents upward flow

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

175215, 137515, F21B 2110, F21B 2112

Patent

active

048238902

ABSTRACT:
A reverse circulation deep hole rock bit that includes a drill bit connector tube telescopically extended into a drill bit housing to cooperatively form a part of a radial inner fluid channel for cuttings to flow axially outwardly and a radial outer annular clearnace space, a plurality of angularly spaced pressurized fluid passage that open to the annular space and a check valve in each fluid fluid passage to permit inward flow of fluid, but to block fluid flow in the opposite direction. A plurality of angularly spaced cutter arms have arcuate tubular segments secured to axial and radial outer portions of the arms while a radially inner tubular skirt is secured to or abuts against the axial outer portions of the arms. The combination of segments, arms and skirt are secured to the housing to extend inwardly thereof with the skirt forming part of the radial inner return channel while each passage opens to a separate chamber angularly between adjacent arms to direct pressurized fluid to flow between the rotary cutters that are mounted by the arms and convey cuttings outwardly through the radial inner fluid channel.

REFERENCES:
patent: Re27316 (1972-03-01), Elenburg
patent: 1874070 (1932-08-01), Wellensieh
patent: 2293259 (1942-08-01), Johnson
patent: 3236319 (1966-02-01), Brown
patent: 3292719 (1966-12-01), Schumacher, Jr.
patent: 3416618 (1968-12-01), Kunnemann
patent: 3419092 (1968-12-01), Elenburg
patent: 3439757 (1969-04-01), Elenburg
patent: 3685601 (1972-08-01), Hollingshead
patent: 3784264 (1974-01-01), Jackson, Jr.
patent: 3948330 (1976-04-01), Langford, Jr.
patent: 4158973 (1979-06-01), Schumacher, Jr. et al.
patent: 4682661 (1987-07-01), Hughes et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Reverse circulation bit apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Reverse circulation bit apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reverse circulation bit apparatus will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1189294

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.