US 11,732,557 B2
Bumper spring
Nathan Boothe, Piedmont, OK (US); and Clint Garrett, Moore, OK (US)
Assigned to Liberty Lift Solutions, LLC, Houston, TX (US)
Filed by Liberty Lift Solutions, LLC, Houston, TX (US)
Filed on Aug. 11, 2021, as Appl. No. 17/399,800.
Prior Publication US 2023/0051529 A1, Feb. 16, 2023
Int. Cl. E21B 43/12 (2006.01); F04B 47/12 (2006.01)
CPC E21B 43/121 (2013.01) [F04B 47/12 (2013.01)] 6 Claims
OG exemplary drawing
 
5. A method of installing a spring in a bumper spring assembly comprising,
compressing the spring,
inserting a unitary impact head and mandrel lower end profile into a flow cage upper end internal profile,
wherein the flow cage upper end includes a radially directed port,
rotating the flow cage to an about 90 degree angle to the long axis of the unitary impact head and mandrel, and
inserting the unitary impact head lower end profile into the interior of the flow cage through the radially directed port,
releasing the spring,
whereby a first shoulder on the unitary impact head and mandrel lower end profile contacts a second shoulder on the flow cage upper end internal profile.