Boring or penetrating the earth – With tool shaft detail – Helix or helically arranged structure
Patent
1994-05-25
1995-12-12
Dang, Hoang C.
Boring or penetrating the earth
With tool shaft detail
Helix or helically arranged structure
1753252, 1753254, E21B 1710, E21B 1722
Patent
active
054741432
ABSTRACT:
A drill bit reamer stabilizer has an upper and lower stabilizer on a bottom hole assembly with the lower stabilizer as close as possible to the drill bit. This arrangement reduces deviations when drilling a straight hole. Furthermore there is a reamer portion at the leading edge of the lower stabilizer to ensure the drilled hole is reamed out to the nominal drill bit size regardless of drill bit wear. The assembly has a longitudinal shaft with a shank on a top end for connection to a drilling string, an internally threaded box in a bottom end of the shaft for connection to the drill bit, the internally threaded box having an internally tapered lip to overlap a drill bit shank. The lower stabilizer has spiral flutes and lands adjacent the bottom end of the shaft, the flutes have polycrystalline diamond layer inserts at the leading edge of the stabilizer to provide a reamer, the inserts ream a hole substantially the same size as the nominal size of the drill bit.
REFERENCES:
patent: 1454048 (1923-05-01), Esperson
patent: 2589534 (1952-03-01), Buttolph
patent: 3285678 (1966-11-01), Garret et al.
patent: 3419094 (1968-12-01), Bobo
patent: 3916998 (1975-11-01), Bass et al.
patent: 3945446 (1976-03-01), Ostertag et al.
patent: 3978933 (1976-09-01), Olson et al.
patent: 4011918 (1977-03-01), Jurgens
patent: 4385669 (1983-05-01), Knutsen
patent: 4467879 (1984-08-01), Burge
patent: 4610316 (1986-09-01), Boaz
patent: 4664206 (1987-05-01), Butler
patent: 4694918 (1987-09-01), Hall
patent: 4811800 (1989-03-01), Hill et al.
patent: 4874045 (1989-10-01), Clayton
Dang Hoang C.
Smith International Canada, Ltd.
LandOfFree
Drill bit reamer stabilizer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Drill bit reamer stabilizer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drill bit reamer stabilizer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1354804