Patent ID: 9033054
Filing Date: 2015-05-19
Classification: E21B,F16J

Abstract:
1. A well tool, comprising: a housing assembly; a tubular closure member which selectively permits and prevents fluid flow through at least one opening in a wall of the housing assembly; and a sealing device which seals between the housing assembly and the tubular closure member, the sealing device including at least a first metal seal and at least one nonmetal seal, a sealing surface of the first metal seal contacting a selected one of the housing assembly and the closure member when the tubular closure member prevents flow through the opening, wherein the nonmetal seal radially biases the first metal seal into sealing contact against the selected one of the housing assembly and the tubular closure member in response to a first pressure differential across the sealing device, and wherein the sealing device further includes a second metal seal, and wherein the nonmetal seal radially biases the second metal seal into sealing contact against the selected one of the housing assembly and the tubular closure member in response to a second pressure differential across the sealing device, the first and second pressure differentials being oppositely directed relative to each other.