Composite heavy metal drill collar

Details Composite heavy metal drill collar Composite heavy metal drill collar

1980-01-21

1981-07-14

Novosad, Stephen J.

Boring or penetrating the earth

With tool shaft detail

285 55, 285332, 285422, E21B 1716, F16L 914

Patent

active

042781388

ABSTRACT:
A composite drill collar for drilling bore holes in earth formations including a structural steel outer jacket having a lower end secured to a lower coupling connectable to a drill bit and an upper end secured to an upper coupling connectable to an adjacent drill collar thereabove. An annular heavy metal core of sintered tungsten is disposed in the jacket and is held in compression therein by preloading the lower and upper couplings against the ends of the core, which places the jacket in tension, causing the jacket to contract and grip the periphery of the core. The structural steel jacket has a thick wall to carry the bending, torsion, compression, tension and impact loads encountered in the drilling operation, so that such loads are not carried through the core, which has the purpose of increasing the overall density and mass of the composite drill collar, lessening considerably the tendency for a deviated well bore to be produced.

REFERENCES:
patent: 1792941 (1931-02-01), Stevenson
patent: 2958512 (1980-11-01), Humphrey
patent: 3047313 (1962-07-01), Bruce
patent: 3167137 (1965-01-01), Humphrey
patent: 3195927 (1965-07-01), Kimbrell
patent: 3232638 (1966-02-01), Hollander
patent: 3572771 (1971-03-01), Redwine
patent: 3706348 (1972-12-01), Murphey, Jr.
patent: 3955835 (1976-05-01), Farrington

Affiliated with

Also associated with

Rating

Composite heavy metal drill collar does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Composite heavy metal drill collar, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Composite heavy metal drill collar will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2160847