Patent ID: 9187997
Filing Date: 2015-11-17
Classification: E21B,F16F

Abstract:
1. A snubber for reducing shock and vibration in down hole tools in oil and gas wells, comprising: a housing having an axis and a chamber, and the housing is configured to be coupled to a first down hole tool; a piston mounted in the chamber for axial movement therein, the piston having a shaft extending therefrom to an exterior of the housing, and the piston is configured to be coupled to a second down hole tool; a first axial spring element mounted between one side of the piston and the housing; a second axial spring element mounted between another side of the piston and the housing, wherein the another side and the one side are opposite each other; and both the piston and the chamber comprise radial section profiles, relative to the axis, that are non-cylindrical.