Patent ID: 8376366
Filing Date: 2013-02-19
Classification: E21B,F16J

Abstract:
1. A downhole sealing gland sealing downhole comprising: a first sealing surface having a first groove and a second groove; a first O-ring received in the first groove and exposed to a first pressure of a high pressure fluid; a second O-ring received in the second groove and exposed to a second pressure of a lower pressure fluid relative to the high pressure fluid; a pressure port located on the first sealing surface between the first groove and the second groove, the pressure port being in communication with an intermediate region between the first O-ring and the second O-ring; a fluid delivered via the pressure port and disposed in the intermediate region, the fluid being at a fluid pressure intermediate to the first pressure applied to the first O-ring and the second pressure applied to the second O-ring; and a second sealing surface mates with the first sealing surface.