Shock absorbing subassembly

Details Shock absorbing subassembly Shock absorbing subassembly

1979-01-08

1981-01-27

Artis, Henry K.

64 1V, E21B 1707, F16D 306

Patent

active

042467659

ABSTRACT:
A shock absorbing subassembly, for use in an oil well drilling string above a drilling bit to absorb and reduce bit induced vibration and impact loads, wherein a shock absorber element is provided which includes at least one set of ring springs.
The ring springs comprise alternating closed outer rings and closed inner rings with tapered contact surfaces on the outer and inner rings.

REFERENCES:
patent: 1609851 (1926-12-01), Wilson
patent: 3325837 (1967-06-01), Hartmann
patent: 3345832 (1967-10-01), Bottoms
patent: 3383126 (1968-05-01), Salvatori et al.
patent: 3406537 (1968-10-01), Falkner
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patent: 3871193 (1975-03-01), Young
patent: 4031716 (1977-06-01), Zabcik
patent: 4133516 (1979-01-01), Jurgens
patent: 4139994 (1979-02-01), Alther
patent: 4173130 (1979-11-01), Sutliff et al.
patent: 4181344 (1980-01-01), Gazda

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