Patent ID: 9140388
Filing Date: 2015-09-22
Classification: E21B,F16J,F16L

Abstract:
1. A seal assembly for sealing an annulus between an inner tubular member and an outer tubular member, the seal assembly comprising: an annular first seal which sealingly divides the annulus into a first part located below the first seal and a second part located above the seal and which in cross section includes: wherein the first seal is part of a packoff which also includes a lower packoff body which is located in the first part of the annulus and an upper packoff body which is located in the second part of the annulus; an annular second seal which is positioned between the first seal and the lower packoff body and which in cross section comprises: wherein the first and second seals are oriented such that the first and third cavities face in opposite directions and the second and fourth cavities face each other.