Stabilizing drill collar

Details Stabilizing drill collar Stabilizing drill collar

1981-12-07

1983-09-13

Leppink, James A.

Boring or penetrating the earth

With tool shaft detail

Shaft carried guide or protector

308 4A, E21B 1710

Patent

active

044036680

ABSTRACT:
A stabilizing drill collar having eight longitudinally-extending sides with means for connecting the collar in a drill string, and having a plurality of wear members welded to alternating sides of the collar. The area of the collar affected by the heat of welding the wear members to the collar is outside the effective circumference of the collar, with the circumference being measured from opposite, flat surfaces of the sides of the collar.

REFERENCES:
patent: 2033638 (1936-03-01), Kappl
patent: 3250578 (1966-05-01), Lubbes
patent: 3268274 (1966-08-01), Ortloff et al.

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