Armored stripper rubber

Details Armored stripper rubber Armored stripper rubber

2007-07-10

2007-07-10

Bagnell, David (Department: 3672)

Wells

Above ground apparatus

With seal for reciprocating member

C166S084100, C277S324000, C277S343000

Reexamination Certificate

active

10845786

ABSTRACT:
An armored stripper rubber is provided that protects the drillstring bore of the stripper rubber from substrate infiltration, yet pivotally dilates to facilitate the passage of drillstring components through the bore while effectively maintaining a fluid-tight seal. Additionally, the stripper rubber substantially inhibits resilient contraction of the stripper rubber to an internal bore diameter smaller than a pre-selected internal diameter. The armored stripper rubber, or armadillo, substantially prevents rubber inversion and puckering under high operational well pressures. Also provided are stripper rubber inserts and insert assemblies.

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