US 11,851,955 B2
Downhole tool with radial shock absorber and stabilizer
Michael Harvey, Calgary (CA); and David Devlin, Calgary (CA)
Assigned to General Downhole Tools Ltd., Calgary (CA)
Filed by General Downhole Tools, Ltd., Calgary (CA)
Filed on Mar. 4, 2022, as Appl. No. 17/686,918.
Claims priority of provisional application 63/134,570, filed on Jan. 6, 2021.
Prior Publication US 2022/0213740 A1, Jul. 7, 2022
Int. Cl. E21B 17/10 (2006.01); E21B 17/042 (2006.01); E21B 17/04 (2006.01)
CPC E21B 17/1078 (2013.01) [E21B 17/041 (2020.05); E21B 17/042 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A device for use downhole in a drill string, the device comprising:
a body that is cylindrical and comprises a longitudinal axis and top and bottom threads configured to couple the body to other elements of the drill string;
a radial shock absorber coupled to an exterior of the body, and the radial shock absorber comprises:
a piston having a piston axis, a portion of the piston extends to an exterior of the body, and the piston is configured to move along the piston axis between a retracted position and an extended position and, in the extended position, the piston is configured to directly contact a well bore; and
a bias member located between the body and the piston such that the bias member is configured to bias the piston, along the piston axis, radially outward relative to the longitudinal axis of the body;
wherein the radial shock absorber further comprises a vibration dampener to dampen movement of the piston;
wherein the vibration dampener comprises a hydraulic dampener; and
wherein the radial shock absorber further comprises an additional piston that is hydraulically coupled to the piston to compensate for movement of the piston.