Internal shock absorber plunger
AssigneeProduction Control Services, Inc.
InventorBruce Victor
Life of this patent
Estimating the term…
Abstract
An improved plunger mechanism apparatus has an internal shock absorber to increase plunger life and increases life of components found at a top and well bottom. The internal shock absorber can be an elastomer spring, die coil spring or wave spring. An actuator rod within the plunger hits the bottom of the well and compresses the internal spring, absorbing all or part of the impact shock. Likewise, when a plunger rises to the well top with a high velocity, damage is avoided as the top of the plunger hits well top apparatus. Reduction in well bottom bumper spring collapses, spring damage, and plunger damage is obtained. Damage to well bottoms having no bumper springs is avoided. Efficiency of well flow is increased by the increase in the reliability of the well operation.
Claims20
A plunger comprising:
- a cylindrical body having an upper and a lower end;
- at least one end having a connecting member to connect thereto a shock absorbing assembly;
- said shock absorbing assembly comprising:
- a moveable piston;
- a cylinder wall housing the moveable piston;
- an internal shock absorbing element located between the piston and an internal stop;
- and
- wherein a falling or a rising of the plunger results in the plunger hitting a well stop, causing the internal shock absorbing element to absorb a portion of an impact force created by the plunger striking the stop.
A plunger comprising:
- a cylindrical body having an upper and a lower end;
- at least one end having a connecting member to connect thereto an internal shock absorber means functioning to damp a force from a plunger's impact with an external well stop;
- and
- said internal shock absorbing means further comprising a case housing having a moveable piston means therein functioning to allow an external end of the piston to impact the external well stop, and thereby impact an internal shock absorbing means functioning to deform and absorb energy.
An internal shock absorber for a plunger, said internal shock absorber comprising:
- attachment means to a plunger functioning to allow a connection to an end of a plunger;
- a case housing means functioning as a cylinder housing for a piston which has an end protruding from the case housing means;
- and
- a shock absorbing means contacting the piston inside the case housing means and functioning to deform upon impact to absorb energy.
A plunger comprising:
- an elongate body having an upper end, a lower end and a central assembly;
- said upper end further comprising an upper end piston which slides inside the central assembly;
- said lower end further comprising a lower end piston which slides inside the central assembly;
- said central assembly further comprising a cylindrical housing supporting an internal shock absorbing element located between the upper end and the lower end piston;
- and
- wherein a falling or a rising of the plunger results in the plunger hitting a well stop causing the internal shock absorbing element to absorb a portion of an impact force created by the plunger striking the stop.
A plunger comprising:
- an elongate body having an upper end, a lower end and a central assembly means;
- said upper end further comprising an upper end piston which slides inside the central assembly means;
- said lower end further comprising a lower end piston which slides inside the central assembly means;
- said central assembly means functioning to support an internal shock absorbing element located between the upper end and the lower end piston;
- and
- wherein a falling or a rising of the plunger results in the plunger hitting well stop causing the internal shock absorbing element to absorb a portion of an impact force created by the plunger striking the stop.
Dependencies are inferred from the claim text.