Abstract: A system includes a Christmas tree (XT) having at least one valve, the XT being coupled to a wellbore. The system also includes a pressure boundary tool adapted to provide a secondary boundary for the XT. The pressure boundary tool includes a plug body to be positioned against a valve member of the at least one valve; a seal to be energized into a valve body of the at least one valve; and a plate arranged proximate the seal, the plate being moveable between a first position and a second position, the first position energizing the seal and a second position deenergizing the seal. The pressure boundary tool is positioned within the XT on a side of the valve member closer to the wellbore.

Abstract: A metal-to-metal seal for sealing an annular space between a well casing and a wellbore. The seal includes an inner portion and an outer portion, each portion including a central seal portion. The central seal portion has a concave shape in a de-energized state which curves towards the centerline of the seal and is capable of flexing radially outward towards surface of the annular space when energized. The central seal portion further includes at least one outer ridge extending outward away from the centerline of the seal and sealingly engages with the outer annular surface when energized.

Abstract: A system includes a Christmas tree (XT) having at least one valve, the XT being coupled to a wellbore. The system also includes a pressure boundary tool adapted to provide a secondary boundary for the XT. The pressure boundary tool includes a plug body to be positioned against a valve member of the at least one valve; a seal to be energized into a valve body of the at least one valve; and a plate arranged proximate the seal, the plate being moveable between a first position and a second position, the first position energizing the seal and a second position deenergizing the seal. The pressure boundary tool is positioned within the XT on a side of the valve member closer to the wellbore.

Abstract: A metal-to-metal seal for sealing an annular space between a well casing and a wellbore. The seal includes an inner portion and an outer portion, each portion including a central seal portion. The central seal portion has a concave shape in a de-energized state which curves towards the centerline of the seal and is capable of flexing radially outward towards surface of the annular space when energized. The central seal portion further includes at least one outer ridge extending outward away from the centerline of the seal and sealingly engages with the outer annular surface when energized.

Abstract: A valve assembly includes a valve body and a valve member configured to translate between an open and a closed position. The valve assembly also includes a bonnet coupled to the valve body and a valve stem coupled to the valve member. The valve assembly also includes an actuator coupled to the bonnet. The actuator includes a first drive mechanism positioned to translate a first driving force to the valve stem, the first drive mechanism being in operation during a normal operating condition. The actuator also includes a second drive mechanism positioned to translate a second driving force to the valve stem, the second drive mechanism being in operation during a fail-safe operating condition.

Abstract: Embodiments of the present disclosure include a valve sleeve for forming at least a portion of a valve flow passage. The valve sleeve includes a seat end having a seat face, the seat end extending at least partially into a chamber of a valve body. The valve sleeve also includes a sleeve portion coupled to the seat end and having a coupling end opposite the seat face, the coupling end comprising a retaining mechanism for removably coupling the valve sleeve to the valve body. The valve sleeve further includes an opening extending along a length of the valve sleeve, the opening forming at least a portion of the valve flow passage and having a generally circular cross section.

Abstract: A valve assembly includes a valve body and a valve member configured to translate between an open and a closed position. The valve assembly also includes a bonnet coupled to the valve body and a valve stem coupled to the valve member. The valve assembly also includes an actuator coupled to the bonnet. The actuator includes a first drive mechanism positioned to translate a first driving force to the valve stem, the first drive mechanism being in operation during a normal operating condition. The actuator also includes a second drive mechanism positioned to translate a second driving force to the valve stem, the second drive mechanism being in operation during a fail-safe operating condition.

Abstract: Embodiments of the present disclosure include a valve sleeve for forming at least a portion of a valve flow passage. The valve sleeve includes a seat end having a seat face, the seat end extending at least partially into a chamber of a valve body. The valve sleeve also includes a sleeve portion coupled to the seat end and having a coupling end opposite the seat face, the coupling end comprising a retaining mechanism for removably coupling the valve sleeve to the valve body. The valve sleeve further includes an opening extending along a length of the valve sleeve, the opening forming at least a portion of the valve flow passage and having a generally circular cross section.

Abstract: A valve assembly includes a valve body defining a flow passage and a body cavity perpendicular to the flow passage. A bonnet is secured to the valve body. A valve member is moveable between an open position and a closed position, the valve member blocking the flow passage in the closed position, and allowing flow through the flow passage in the open position. A valve stem is coupled to the valve member. A debris barrier circumscribes the valve stem. The debris barrier comprises a first disk shaped member with a central opening through which the valve stem is inserted, and notches that extend radially from the central opening to define petals with ends that abut the valve stem.

Abstract: A valve assembly includes a valve body defining a flow passage and a body cavity perpendicular to the flow passage. A bonnet is secured to the valve body. A valve member is moveable between an open position and a closed position, the valve member blocking the flow passage in the closed position, and allowing flow through the flow passage in the open position. A valve stem is coupled to the valve member. A debris barrier circumscribes the valve stem. The debris barrier comprises a first disk shaped member with a central opening through which the valve stem is inserted, and notches that extend radially from the central opening to define petals with ends that abut the valve stem.