Abstract: The present invention is directed to a pressure balanced fluid control device. In one illustrative embodiment, the device comprises a body, a bonnet coupled to the body, a valve stem operatively coupled to a gate positioned in the body, a valve stem seal positioned between the valve stem and the bonnet, wherein a sealed cavity exists above the valve stem seal, and an opening through the bonnet that is adapted to allow a pressure of a working fluid flowing through the valve to be exerted in the sealed cavity above the valve stem seal. In another illustrative embodiment, the device comprises a body, a bonnet coupled to the body, a valve stem operatively coupled to a gate positioned in the body, a valve stem seal positioned between the valve stem and the bonnet, wherein a sealed cavity exists above the valve stem seal, and an opening through the bonnet, the opening being in fluid communication with the sealed cavity and an interior region of the body.

Abstract: The present invention is directed to a pressure balanced fluid control device. In one illustrative embodiment, the device comprises a body, a bonnet coupled to the body, a valve stem operatively coupled to a gate positioned in the body, a valve stem seal positioned between the valve stem and the bonnet, wherein a sealed cavity exists above the valve stem seal, and an opening through the bonnet that is adapted to allow a pressure of a working fluid flowing through the valve to be exerted in the sealed cavity above the valve stem seal. In another illustrative embodiment, the device comprises a body, a bonnet coupled to the body, a valve stem operatively coupled to a gate positioned in the body, a valve stem seal positioned between the valve stem and the bonnet, wherein a sealed cavity exists above the valve stem seal, and an opening through the bonnet, the opening being in fluid communication with the sealed cavity and an interior region of the body.

Abstract: A seal for sealing between a first component and a second component includes a first metallic element comprising a plurality of sealing profiles and defining a groove therein and a second metallic element comprising a plurality of sealing profiles and a protrusion mated with the groove of the first metallic element. The seal further includes a retaining member engaged with the second metallic element and capable of being engaged with one of the first component and the second component for retaining the first and second metallic elements in a position, wherein some of the plurality of sealing profiles are capable of sealing against the first component and some of the plurality of sealing profiles are capable of sealing against the second component.

Abstract: A seal includes a bore seal portion comprising a first leg terminating in a first sealing profile and a second leg terminating in a second sealing profile, a crush seal portion, and a web extending between the crush seal portion and the bore seal portion. A method of installing a seal includes pressing a bore seal portion of the seal into a first bore of a first member such that a first sealing profile is urged against an inner surface of the first bore, pressing the bore seal portion of the seal into a second bore of a second member such that a second sealing profile is urged against an inner surface of the second bore and the first bore is generally aligned with the second bore, and crushing a crush seal portion of the seal within grooves defined by the first member and the second member.

Abstract: A seal for sealing against a surface includes a body having a deflectable intermediate portion terminating in an end portion and a sealing element including a softer material than that of the surface and disposed along the end portion of the body. A method of producing a seal includes providing a body comprising a deflectable intermediate portion terminating in an end portion and disposing a sealing element including a softer material than that of the body along the end portion of the body. A seal includes a body including a deflectable intermediate portion terminating in an end portion, a sealing element including a softer material than that of the body and disposed along the end portion of the body, and means for retaining the sealing element at the end portion.

Abstract: A seal for sealing between a first component and a second component includes a first metallic element comprising a plurality of sealing profiles and defining a groove therein and a second metallic element comprising a plurality of sealing profiles and a protrusion mated with the groove of the first metallic element. The seal further includes a retaining member engaged with the second metallic element and capable of being engaged with one of the first component and the second component for retaining the first and second metallic elements in a position, wherein some of the plurality of sealing profiles are capable of sealing against the first component and some of the plurality of sealing profiles are capable of sealing against the second component.

Abstract: A seal for inhibiting a flow of fluid through an annulus defined by a first component and a second component includes a sealing element disposed within the annulus and having at least one sealing profile in contact with a surface of the first component to inhibit a flow of fluid therebetween and means for retaining the sealing element on a surface of the second component that defines the annulus, wherein the sealing element is sealingly engaged with the second component such that a flow of the fluid is inhibited therebetween.

Abstract: A mechanically energized annular packoff seal cartridge for metal-to-metal sealing with substantially concentrically arranged tubular members, such as the tubular wellhead housing and well casing of an oil and gas well. A tubular pressure responsive energizing mandrel having downwardly converging frusto-conical seal actuating surfaces is of a dimension for entry into the annulus between the wellhead seal bore and the rough outer surface of the well casing. Elastomer seals are carried by the energizing mandrel and establish sealing of the energizing mandrel with the wellhead housing and well casing A pair of soft metal seal rings are carried by the seal cartridge and are forced radially into metal-to-metal sealing with the wellhead housing and the rough outer surface of the well casing respectively by the double tapered seal actuating surfaces responsive to pressure induced downward force on the energizing mandrel.