Patent ID: 9157284
Filing Date: 2015-10-13
Classification: E21B

Abstract:
1. A shock absorber assembly comprising: a housing; a biasing mechanism disposed within the housing; a rotatable shaft assembly comprising: a thrust bearing assembly; an upper shaft supported by a first radial bearing, wherein the upper shaft is capable of being attached to a motor; a lower shaft supported by a second radial bearing is concentrically disposed around at least a portion of the upper shaft, wherein the lower shaft is telescopically extendable from the upper shaft, the lower shaft is capable of being attached to a drill bit, and the second radial bearing is located outside of the lower shaft and inside of the housing; a mating mechanism that rotationally fixes rotation of the lower shaft with respect to the upper shaft; and wherein axial shocks are transmitted from the drill bit to the rotatable shaft assembly and the rotatable shaft assembly limits such axial shocks from being transmitted to the motor.