초록 ▼

Internal and external metal-to-metal radially interfering seals are provided for an annular chamber. Typically, an annular chamber is used in tubular goods to be part of the hydraulic control circuitry, such as for operating subsurface equipment such as a subsurface safety valve. Resilient seals are

Internal and external metal-to-metal radially interfering seals are provided for an annular chamber. Typically, an annular chamber is used in tubular goods to be part of the hydraulic control circuitry, such as for operating subsurface equipment such as a subsurface safety valve. Resilient seals are eliminated and sealing reliability is enhanced by a design which features metal-to-metal seals internally and externally, preferably assembled by an external two-step thread. The radial interference seal, which is internally disposed, is constructed so as to be incapable of experiencing tensile loads. This reinforces joint integrity by minimizing stresses on thin components.

대표청구항 ▼

[ What is claimed is:] [6.] A method of sealing a chamber in a wall of a downhole tubular against internal and external applied pressures, comprising:forming a threaded tubular pin and a threaded tubular box member so that when threaded together, a chamber is formed in a wall defined by said threade

[ What is claimed is:] [6.] A method of sealing a chamber in a wall of a downhole tubular against internal and external applied pressures, comprising:forming a threaded tubular pin and a threaded tubular box member so that when threaded together, a chamber is formed in a wall defined by said threaded together pin and box members;providing an internal metal-to-metal seal for said chamber, between said pin and box;threading said pin and box to form said internal seal;providing an external metal-to-metal seal due to said connection;disposing said internal seal on the opposite side of said chamber from said external seal;providing at least one passage in said wall in fluid communication with said chamber;connecting said passage in a fluid control system independent of an internal bore formed by said wall.