Abstract: An apparatus includes a valve coupled to a pressure-containing component of a wellhead assembly. The pressure-containing component can include a hollow body, a bore within the hollow body, and an access passage that is in the hollow body and is in fluid communication with the bore. The valve can include a sealing element that is positioned along the access passage and is selectively moveable between closed and open positions to control fluid flow through the access passage. During operation, the sealing element may be moved between the closed and open positions without actuating the sealing element through an outer end of the access passage. Additional systems, devices, and methods are also disclosed.

Abstract: A system including a valve, including a valve body having an interior volume and a bore along a first axis, a stem extending along a second axis, and a flow control element coupled to the stem, wherein the stem is configured to selectively move the flow control element through the interior volume between a closed position and an open position relative to the bore, and a valve insert system configured reduce a size of the interior volume and to guide a lubricant to reduce wear on the flow control element.

Abstract: A magnetoresistive memory architecture in one aspect includes a plurality of bit lines each coupled to two or more respective columns of magnetoresistive memory cells, and a plurality of source lines each coupled to a respective one of the columns of memory cells. A given memory cell can be accessed by biasing a selected word line, a selected bit line, and a selected source line coupled to corresponding column of memory cells coupled to the selected bit line, and by counter biasing one or more selected source lines coupled to one or more other columns of memory cells coupled to the selected bit line.

Abstract: A system including a shearing gate valve system including a shearing gate valve including a flow control element configured to move axially and block a flow of fluid through the shearing gate valve, a cutting blade coupled to the flow control element and configured to shear a tubular, a first seat configured to form a seal with the flow control element to block the flow of fluid, and a second seat with an open end configured to block the shearing gate valve from shearing the tubular member at two locations.

Abstract: A system including a valve, including a valve body having an interior volume and a bore along a first axis, a stem extending along a second axis, and a flow control element coupled to the stem, wherein the stem is configured to selectively move the flow control element through the interior volume between a closed position and an open position relative to the bore, and a valve insert system configured reduce a size of the interior volume and to guide a lubricant to reduce wear on the flow control element.

Abstract: A magnetoresistive memory architecture in one aspect includes a plurality of bit lines each coupled to two or more respective columns of magnetoresistive memory cells, and a plurality of source lines each coupled to a respective one of the columns of memory cells. A given memory cell can be accessed by biasing a selected word line, a selected bit line, and a selected source line coupled to corresponding column of memory cells coupled to the selected bit line, and by counter biasing one or more selected source lines coupled to one or more other columns of memory cells coupled to the selected bit line.

Abstract: A system including a valve, including a valve body having an interior volume and a bore along a first axis, a stem extending along a second axis, and a flow control element coupled to the stem, wherein the stem is configured to selectively move the flow control element through the interior volume between a closed position and an open position relative to the bore, and a valve insert system configured reduce a size of the interior volume and to guide a lubricant to reduce wear on the flow control element.

Abstract: A system including a shearing gate valve system including a shearing gate valve including a flow control element configured to move axially and block a flow of fluid through the shearing gate valve, a cutting blade coupled to the flow control element and configured to shear a tubular, a first seat configured to form a seal with the flow control element to block the flow of fluid, and a second seat with an open end configured to block the shearing gate valve from shearing the tubular member at two locations.

Abstract: An apparatus that includes a body of a gate configured to seal a gate valve. In certain embodiments, the body has a first face with a first coating disposed thereon, and a second face opposite the first face and having a second coating disposed thereon. The body also may include a flow bore that extends from the first face, through the body of the gate, to the second face and a reference structure that does not have either the first coating or the second coating disposed thereon. In some embodiments, the reference structure is configured to define a plane on the first face, the second face, or both during a planarization process.

Abstract: A system including a valve, including a valve body having an interior volume and a bore along a first axis, a stem extending along a second axis, and a flow control element coupled to the stem, wherein the stem is configured to selectively move the flow control element through the interior volume between a closed position and an open position relative to the bore, and a valve insert system configured reduce a size of the interior volume and to guide a lubricant to reduce wear on the flow control element.

Abstract: This application discloses a hard disk drive using a self-resonant frequency band of a Voice Coil Motor far above its operational frequency band to predict Rapid Off Track events before its head stack assembly can deliver the disruption to the slider writing a track. A circuit board and/or an integrated circuit are disclosed in various embodiments to predict the ROT events using the self-resonant frequency band and/or to respond to the prediction to suppress the slider writing.

Abstract: This application discloses a hard disk drive using a self-resonant frequency band of a Voice Coil Motor far above its operational frequency band to predict Rapid Off Track events before its head stack assembly can deliver the disruption to the slider writing a track. A circuit board and/or an integrated circuit are disclosed in various embodiments to predict the ROT events using the self-resonant frequency band and/or to respond to the prediction to suppress the slider writing.

Abstract: Flux-switching electrical machines. In particular, a flux-switching electrical machine having a stator and a rotor. The stator has permanent magnets, armature windings and excitation windings, and the rotor has no winding or permanent magnet but includes a plurality of flux-switching teeth. The stator is generally formed by a succession of elementary cells, each cell being intended to interact with only a single tooth of the rotor at a time. Each cell includes one of the permanent magnets; a first slot for at least partly housing one of the excitation windings at least; and second slots for housing one of the armature windings.

Abstract: An apparatus that includes a body of a gate configured to seal a gate valve. In certain embodiments, the body has a first face with a first coating disposed thereon, and a second face opposite the first face and having a second coating disposed thereon. The body also may include a flow bore that extends from the first face, through the body of the gate, to the second face and a reference structure that does not have either the first coating or the second coating disposed thereon. In some embodiments, the reference structure is configured to define a plane on the first face, the second face, or both during a planarization process.

Abstract: Flux-switching electrical machines. In particular, a flux-switching electrical machine having a stator and a rotor. The stator has permanent magnets, armature windings and excitation windings, and the rotor has no winding or permanent magnet but includes a plurality of flux-switching teeth. The stator is generally formed by a succession of elementary cells, each cell being intended to interact with only a single tooth of the rotor at a time. Each cell includes one of the permanent magnets; a first slot for at least partly housing one of the excitation windings at least; and second slots for housing one of the armature windings.

Abstract: A memory system includes memory cells arranged in sectors. A decoder corresponding to a sector disables memory cells having a defective top gate. The decoder may include a low voltage or high voltage latch for the disabling. A top gate handling algorithm is included. The memory system may include dynamic top gate coupling. A programming algorithm and waveforms with top gate handling is included.

Abstract: A memory system includes memory cells arranged in sectors. A decoder corresponding to a sector disables memory cells having a defective top gate. The decoder may include a low voltage or high voltage latch for the disabling. A top gate handling algorithm is included. The memory system may include dynamic top gate coupling. A programming algorithm and waveforms with top gate handling is included.

Abstract: A memory system includes memory cells arranged in sectors. A decoder corresponding to a sector disables memory cells having a defective top gate. The decoder may include a low voltage or high voltage latch for the disabling. A top gate handling algorithm is included. The memory system may include dynamic top gate coupling. A programming algorithm and waveforms with top gate handling is included.

Abstract: A valve system comprising a closure member that is linearly translatable within a valve body. A hydraulic override assembly comprises a first end that is connected to the valve body and a first rod member that is connected to the closure member. A linear actuator is connected to a second end of the hydraulic override assembly and comprises a second rod member that is operable to move the first rod member.

Abstract: A valve system comprising a closure member that is linearly translatable within a valve body. A fail safe assembly is connected to the valve body and a first rod member that is connected to the closure member. A linear actuator is movably connected to the fail safe assembly and is operable to move the first rod member. A mechanical override system is connected to the linear actuator and is operable to move the linear actuator relative to the valve body.