Abstract: A gate valve comprises a valve body including a cavity and a flow bore with a flow axis. A gate in the cavity is movable along a stem axis between an open and closed position. A first seat is in a first pocket of the body on one side of the gate. An upstream seal is disposed between upstream opposing faces of the first seat and the first pocket, these upstream opposing faces being parallel to the bore axis, and the upstream seal is configured to prevent fluid moving axially from the flow bore toward the gate. A downstream seal is disposed between downstream opposing faces of the first seat and the first pocket, these downstream opposing faces being perpendicular to the bore axis, and the downstream seal is configured to prevent fluid moving from the cavity toward the flow bore in a direction perpendicular to the bore axis.

Abstract: A gate valve comprises a valve body including a cavity and a flow bore with a flow axis. A gate in the cavity is movable along a stem axis between an open and closed position. A first seat is in a first pocket of the body on one side of the gate. An upstream seal is disposed between upstream opposing faces of the first seat and the first pocket, these upstream opposing faces being parallel to the bore axis, and the upstream seal is configured to prevent fluid moving axially from the flow bore toward the gate. A downstream seal is disposed between downstream opposing faces of the first seat and the first pocket, these downstream opposing faces being perpendicular to the bore axis, and the downstream seal is configured to prevent fluid moving from the cavity toward the flow bore in a direction perpendicular to the bore axis.

Abstract: A gate valve comprises a valve body including a cavity and a flow bore with a flow axis. A gate in the cavity is movable along a stem axis between an open and closed position. A first seat is in a first pocket of the body on one side of the gate. An upstream seal is disposed between upstream opposing faces of the first seat and the first pocket, these upstream opposing faces being parallel to the bore axis, and the upstream seal is configured to prevent fluid moving axially from the flow bore toward the gate. A downstream seal is disposed between downstream opposing faces of the first seat and the first pocket, these downstream opposing faces being perpendicular to the bore axis, and the downstream seal is configured to prevent fluid moving from the cavity toward the flow bore in a direction perpendicular to the bore axis.

Abstract: An embodiment includes a choke system comprising: a choke body; a gate having first and second sidewalls opposing one another; a first seat including a first channel and first conduits; a second seat coupling the second sidewall to the choke body and including a second channel; a third seat coupling the first sidewall to the choke body; a plug coupled to a bottom surface of the gate; a choke stem coupled to a top surface of the gate; wherein (a) the choke system is to convey fluid through the first channel and first conduits when the gate is open and fluid is pressurized in the second channel, and (b) the first conduits of the first seat have first long axes that are non-collinear with a long axis of the first channel. Other embodiments are described herein.

Abstract: An embodiment includes a choke system comprising: a choke body; a gate having first and second sidewalls opposing one another; a first seat including a first channel and first conduits; a second seat coupling the second sidewall to the choke body and including a second channel; a third seat coupling the first sidewall to the choke body; a plug coupled to a bottom surface of the gate; a choke stem coupled to a top surface of the gate; wherein (a) the choke system is to convey fluid through the first channel and first conduits when the gate is open and fluid is pressurized in the second channel, and (b) the first conduits of the first seat have first long axes that are non-collinear with a long axis of the first channel. Other embodiments are described herein.