Cylinder liner retainer system with torque multiplier and method
AssigneePremium Oilfield Technologies, LLC
InventorDouglas Jahnke
Life of this patent
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Abstract
The present invention provides a cylinder liner retainer system with a torque multiplier and associated method to quickly release an existing cylinder liner and reinsert a new cylinder liner as a replacement.
Claims10
A cylinder liner retainer system to couple a replaceable cylinder liner to a fluid end portion of a pump, the pump having a piston to reciprocate longitudinally along a centerline within the cylinder liner, comprising:
- a liner housing formed with threads and a longitudinal bore formed inside a housing wall and configured to be slidably coupled with the liner, the liner housing having a portion configured to be coupled to the fluid end portion;
- a pinion bracket assembly having a pinion rotatably coupled thereto, the pinion having gear teeth and a rotatable actuator;
- and
- a collar nut having a longitudinal bore sized to be slidably coupled with the liner on a distal end of the liner from the liner housing, the collar nut formed with threads configured to be rotatably coupled with the threads on the liner housing, and the collar nut having a gear with teeth configured to be rotatably coupled with the gear teeth on the pinion;
- wherein the collar nut is configured to be threadably coupled with the liner housing and secure the liner therebetween by rotation of the pinion that rotates the collar nut gear with the collar nut that couples the threads on the liner housing with the threads on the collar nut that presses the liner toward the fluid end portion.
A method of installing a replaceable cylinder liner for a piston in a pump, the piston configured to reciprocate longitudinally along a centerline within the cylinder liner, the pump having a cylinder liner retainer system to couple the cylinder liner to a fluid end portion of the pump, the cylinder liner retainer system having a liner housing formed with threads and a longitudinal bore formed inside a housing wall, the liner housing having a portion configured to be coupled to the fluid end portion, a pinion bracket assembly having a pinion rotatably coupled thereto, the pinion having gear teeth and a rotatable actuator, and a collar nut having a longitudinal bore and formed with threads and having a collar nut gear with teeth, the method comprising:
- slidably coupling the cylinder liner into the bore of the liner housing;
- slidably coupling the collar nut with the cylinder liner, the collar nut bore being disposed over the cylinder liner at a distal end of the liner from the liner housing;
- rotating the collar nut to couple the threads on the collar nut with the threads on the liner housing;
- rotatably coupling the collar nut gear teeth with the pinion gear teeth;
- and
- rotating the actuator on the pinion to rotate the collar nut gear thereby
- further coupling the threads on the collar nut with the threads on the liner housing and
- pressing the liner toward the fluid end portion with the collar nut.
Dependencies are inferred from the claim text.