Tubular drill string member with contoured circumferential surfa

Details Tubular drill string member with contoured circumferential surfa Tubular drill string member with contoured circumferential surfa

1982-09-20

1984-08-14

Novosad, Stephen J.

Boring or penetrating the earth

Processes

Boring curved or redirected bores

175323, 175325, E21B 704, E21B 1716, E21B 1722

Patent

active

044651465

ABSTRACT:
A tubular member for a drill string used in the rotary drilling of deviated boreholes, which includes an outer circumferential surface which is contoured and adapted to engage the wall of the borehole so as to produce a longitudinally downward force on the drill bit upon rotation of the drill string. The tubular member may be a drill collar or section of drill pipe, wherein the contoured surface is constituted of a helical thread of a pitch which will impart a longitudinal force towards the drill bit upon rotation of the tubular member.

REFERENCES:
patent: 2869828 (1959-01-01), McClinton
patent: 2999552 (1961-09-01), Fox
patent: 3085639 (1963-04-01), Fitch
patent: 3194331 (1965-07-01), Arnold
patent: 3360960 (1968-01-01), Massey
patent: 3372763 (1968-03-01), Fischer
patent: 3762828 (1973-10-01), Faber
patent: 4036539 (1977-07-01), Saunders et al.
patent: 4365678 (1982-12-01), Fitch

Affiliated with

Also associated with

Rating

Tubular drill string member with contoured circumferential surfa does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Tubular drill string member with contoured circumferential surfa, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tubular drill string member with contoured circumferential surfa will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-109489