3-ring non-extrusion seal assembly and method

摘要

A three-ring seal assembly is provided to seal across extrusion gaps of varying size when used during down hole fishing operations.

主权项

1. A three-ring seal assembly comprising:
a seal having an upper and a lower end; a first ring having a substantially triangular profile, wherein the first ring is a non-extrusion ring having a scarf cut and abutting the lower end of the seal, the first ring also having, a sealing diameter, an assembly-facing diameter, an angled face at an upper end and an angled face at a lower end, wherein the angled faces converge from the sealing diameter to the assembly diameter; a second ring abutting the lower end of the first ring, the second ring having an upper end and a lower end, wherein the second ring has an angled face on the upper end of the second ring that mates with the angled face on the lower end of the first ring; and a third ring abutting the lower end of the second ring wherein the third ring comprises an angled face on an upper end of the third ring, such that the angled face on the upper end of the third ring mates with the angled face on the lower end of the second ring when the three-ring seal assembly is in the sealed position.