Drill string stabilizer

Details Drill string stabilizer Drill string stabilizer

1988-08-23

1989-09-12

Novosad, Stephen J.

Boring or penetrating the earth

With tool shaft detail

Shaft carried guide or protector

166241, 24279, E21B 1710

Patent

active

048651389

ABSTRACT:
A stabilizer for a drilling string comprises a one-piece metal loop, stabilizing blades, and tightening bolts co-operating with internally threaded bores to draw the end portions of the loop towards each other. One end portion is formed with an involute camming surface on which the other end portion rides to urge the one end portion resiliently inwards.

REFERENCES:
patent: 1497549 (1924-06-01), Conradi
patent: 2250653 (1941-07-01), Safford
patent: 2936186 (1960-05-01), Dunmire
patent: 3397017 (1968-08-01), Grant et al.
patent: 4004326 (1977-01-01), Beavers
patent: 4042023 (1977-08-01), Fox
patent: 4275935 (1981-06-01), Thompson et al.
patent: 4483395 (1984-11-01), Kramer et al.
patent: 4639020 (1987-01-01), Rung et al.
patent: 4653782 (1987-03-01), Munday
patent: 4664428 (1987-05-01), Bridges
Cundy et al., "Mathematical Models", 2d Edition, 1961, Oxford University Press, London, pp. 49-55.
Spiegel, "Mathematical Handbook", McGraw-Hill Book Co., N.Y., 1968, p. 43.

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