Shock attenuating apparatus and method

Details Shock attenuating apparatus and method Shock attenuating apparatus and method

1991-04-16

1992-06-02

Novosad, Stephen J.

Wells

Processes

With explosion or breaking container to implode

166 63, 166242, 166297, E21B 2902, E21B 43263

Patent

active

051179113

ABSTRACT:
An apparatus attenuates a shock, such as an impact load from an explosion, by undergoing plastic deformation and by serially dissipating energy from a plurality of surfaces. In a particular embodiment, the plastic deformation and serial energy dissipation occur in and from a hollow unitary body having a cylindrical wall in which are defined a plurality of longitudinally spaced circumferential grooves. A method of attenuating shock from an explosion in an oil gas well comprises: lowering into the well an explosive connected to a shock attenuating member; detonating the explosive whereby an impact load with a shock wave is generated; and collapsing without severing the member in response to the impact load and dissipating energy of the shock wave from a plurality of surfaces of the member so that the shock wave is attenuated along the member.

REFERENCES:
patent: 2810440 (1957-10-01), Kenneday et al.
patent: 3163112 (1964-12-01), Rhea
patent: 3274798 (1966-09-01), Wiggins, Jr.
patent: 3709294 (1973-01-01), Kilgore
patent: 4378844 (1983-04-01), Parrish et al.
patent: 4628995 (1986-12-01), Young et al.
patent: 4735264 (1988-04-01), Burris, II et al.

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