Drill string shock absorber

Details Drill string shock absorber Drill string shock absorber

1974-12-23

1976-06-15

Marbert, James B.

Spring devices

Coil

Conical

267125, 64 23, 64 4R, F16F 106

Patent

active

039632288

ABSTRACT:
In accordance with an illustrative embodiment of the present invention as disclosed herein, a shock absorber adapted to be incorporated in a drill string includes axially splined housing and mandrel members having a helical coil spring reacting therebetween to absorb longitudinal vibration and shock loads and otherwise attenuate exciting forces generated by the drill bit. The coil spring has a low spring rate and is enclosed between the housing and a hollow flow tube that is slidably sealed with respect to the housing and the mandrel.

REFERENCES:
patent: 3033011 (1962-05-01), Garrett
patent: 3122902 (1964-03-01), Blair et al.
patent: 3858669 (1975-01-01), Jeter

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