Abstract: A lock (100) for motor vehicle hood comprising: a catch (2) suitable for fastening a striker (S), a pawl (3) that cooperates with the catch in order to block the catch in closing position, a safety lever (4) that guarantees the additional closing of the striker, a first spring (M1) that stresses the catch towards an opening position; a second spring (M2) that stresses the pawl towards a closing position; a third spring (M3) that stresses the safety lever (4) towards closing position; a first Bowden cable (B1) connected to the pawl (3) to pull said pawl (3) towards the opening position; and a second Bowden cable (B2) connected to the safety lever (4) to pull said safety lever (4) towards the opening position.

Abstract: A latching mechanism releasably engages a striker. The latching mechanism includes a housing secured to the vehicle body, and defining a striker channel through which the striker is selectively movable along a striker path. The latching mechanism includes a release lever pivotally connected to the housing and configured to rotate in a first direction in response to a tensile force. A detent is pivotally connected to the housing and to the release lever, and is movable with lost motion relative to the release lever. A fork bolt is adjustably connected to the housing and movable between a fully latched position, where the fork bolt fixes the striker relative to the housing, and a secondary position, where the striker is movable relative to the housing. Moving the fork bolt from the secondary position to the fully latched position causes the lost motion between the detent and the release lever.

Abstract: A locking device for a door includes a first latch unit including a catching unit positioned at a lateral side of the first door and rotatably coupled to a first plate, a pawl unit rotatably coupled to the first plate to rotate the catching unit or restrict the rotation of the catching unit, and a first release lever configured to assist in rotating the pawl unit about a rotating shaft for the pawl unit. A second latch unit is positioned at a lateral side of the second door so as to face the first latch unit and includes a second release lever rotatably coupled to a second plate, and a striker unit configured to be caught by or released from the rotating catching unit.

Abstract: A contact-minimizing door opening and closing system for a door has a handle including a shaft with an endplate disposed on the shaft opposite the handle and a latch bolt including a pin positioned to contact the endplate. The pin prevents movement of the handle when the latch bolt is extended from a lock housing, and allows movement of the handle when the latch bolt is retracted into the lock housing. An engaging and disengaging mechanism couples the handle to a locking pin such that movement of the handle is configured to operate the engaging and disengaging mechanism to lock the door.

Abstract: A door barricade device having a bar with two structures attached at either end of the bar, which slide under a door and engage the doorframe, to prevent a door from opening into a room, such as a classroom. The bar can be telescoping, having two portions with one slidably received within the other portion, to allow for adjustment to doors of varying widths. The telescoping bar can have a locking device to lock the bar into a predetermined width. The structures attached at either end can be a pair of footers, each with a post attached, with the posts being shaped to conform to the room frame.

Abstract: An apparatus for providing improved security to an outward-swing door of a vehicle. The outward-swing door is on a sidewall of a main housing of the vehicle and has a pivotal end and a distal end opposite to the pivotal end. The outward-swing door is outwardly pivotable about the pivotal end thereof. The apparatus comprises a connecting structure for coupling to a bottom wall of the main housing, a base structure for coupling to the connecting structure so as to locate adjacent the outward-swing door and outside a swing path of the outward-swing door, and a blocking structure demountably coupled to the base structure, at least a portion thereof extendable into the swing path of the outward-swing door for restricting the outward-swing door to open to a predefined maximum extent.

Abstract: A hinge is coupled to a first component and a second component. The hinge supports the second component for movement relative to the first component between a closed position covering an opening through the first component and an opened position displaced from the opening. The hinge includes a first bracket coupled to the second component, a second bracket coupled to the first component, a support link coupled to the first and second brackets, and a control link coupled to the first and second brackets. Rotation of the support link relative to the first bracket causes rotation of the first component relative to the second component and relative to the support link.

Abstract: A vehicle includes a vehicle body, a tailgate and a hinge assembly. The tailgate is rotatable relative to the vehicle body between a closed position and an open position. The hinge assembly rotatably coupling the tailgate to the vehicle body. The hinge assembly includes a bracket, a hinge pin and a retention ring. The bracket is attached to a respective one of a plurality of side walls of the vehicle body. The hinge pin is rotatably fixed to a respective end of the tailgate and is removably connected to the bracket. The retention ring is rotatably coupled to the bracket between a locked state in which the hinge pin is prevented from being disconnected from the bracket and an unlocked state in which the hinge pin is permitted to be disconnected from the bracket.

Abstract: A vehicle slide door support device connects a slide door to a vehicle body. The slide door is configured to open and close a door opening formed in a side surface of the vehicle body. The device includes: a first guide rail arranged on a lower portion of the slide door and regulating a movement direction of the slide door; a first hinge unit arranged below the door opening and configured to move relative to the first guide rail in a longitudinal direction of the first guide rail; a second guide rail arranged above the first hinge unit on the vehicle body and regulating the movement direction of the slide door; and a second hinge unit arranged above the first guide rail on the slide door and configured to move relative to the second guide rail in a longitudinal direction of the second guide rail.

Abstract: A stowage bin assembly includes a bin bucket assembly having a bin bucket which includes at least one sidewall, the at least one sidewall including a notch and the at least one sidewall having an interior surface. The stowage bin assembly also includes at least one hinge assembly. The at least one hinge assembly includes a housing which is received in the notch, the housing having an interior surface, wherein the interior surface of the housing is substantially flush with the interior surface of the at least one sidewall when the housing of the at least one hinge assembly is received in the notch. The stowage bin assembly also includes a stowage bin door pivotably coupled to the bin bucket assembly via the at least one hinge assembly, the stowage bin door moveable between an open position and a closed position. Related components, assemblies, and devices are also provided.

Abstract: A movable window apparatus is disclosed. The movable window apparatus may comprise a window panel, a first electrical contact, and a second electrical contact. The window panel is operable between an opened position and a closed position. The first electrical contact is coupled to the window panel. The second electrical contact is coupled to the vehicle. Further, the first electrical contact is operable to engage the second electrical contact when the window panel is in a first position and disengage the second electrical contact when the window panel is out of the first position. Engagement of the second electrical contact by the first electrical contact forms a conductive connection. This conductive connection has the advantage of being engageable and dis-engageable. Accordingly, the movable window apparatus enables a conductive connection with a window panel without inhibiting the movement of the window panel between two or more positions.

Abstract: Emergency actuating device, especially for vehicle doors, is provided. The device includes: a support base; a manual actuation element adapted to assume rest and actuation configurations; an electromagnetically driven locking mechanism adapted to lock the actuation element in its rest configuration; a protective shell adapted to assume a closed configuration in which the shell isolates the actuation element from the outer environment when the actuation element is in its rest configuration, and makes it impossible to reach the actuation element with a hand, and an open configuration, in which the actuation element can be reached with a hand to be brought from the rest configuration to the actuation configuration and vice versa; and an opening sensor adapted to generate an electric signal indicative of the open configuration of the protective shell, the signal being processable by an electronic control unit for controlling locking and/or unlocking of the locking mechanism.

Abstract: The invention relates to a device for releasing and resetting a fire and smoke barrier. In a normal use state, a clutch member is held by an electromagnetic attraction unit, so that a push rod ejecting module cannot be actuated, and a door operator is controlled by a clutch module thereof. Upon power failure, for example upon an accident, the clutch member is released by the electromagnetic attraction unit, and a barrier release member is activated by the push rod ejecting module so as to shut the fire and smoke barrier. Upon power restoration, the clutch member is attracted and held by the electromagnetic attraction unit, and the push rod ejecting module is reset by a push rod resetting module. At the same time, the barrier release member is also reset.

Abstract: Certain example embodiments of this invention relate to vacuum insulated glass (VIG) units, and/or methods of making the same. The sealing tube or sealing material is provided within the VIG unit, thereby potentially eliminating the need for a protective cap and allowing for more freedom in handling, frame design, hybrid VIG construction, lamination, and the like. The sealing tube may be relocated to an internal area within a recessed pocket of a substrate at least in certain example embodiments. The VIG unit lacks a protruding pump-out tube or the like.

Abstract: The present disclosure relates to a method of providing vacuum insulating glass (VIG) units each comprising at least a first and a second glass pane and a plurality of support pillars distributed between opposing surfaces of said glass panes to provide a gap (8) between the glass panes. A plurality of pane elements are provided, and individual topographic representations (TOPREP_2a TOPREP_2n) of each of said plurality of pane elements (2a-2n) are obtained based on input (4) from a measuring arrangement (3), and the topographic representations are stored in a data storage (DS). The stored topographic representations are processed and resulting surface distance characteristic between pairs of panes are estimated. Vacuum insulating glass (VIG) assemblies are thus provided based on estimated resulting surface distance characteristics. The present disclosure additionally relates to a system.

Abstract: A security door system includes a door frame, a door, and an astragal. The door frame has first and second vertically extending side members that define an opening therebetween. The door is disposed within the opening and is secured to the frame via a hinged connection along the first vertically extending side member. A gap is defined between an edge of the door, that is opposite the hinged connection, and the second vertically extending side member when the door is in a closed position. The astragal has first and second plates that are secured to an outer surface of the door. The first plate extends beyond the edge such that the first plate covers the gap when the door is in the closed position. The second plate extends from the first plate in a direction away from the edge and toward the hinged connection.

Abstract: An assembly of a box includes an outer wall defining an inner space and a mounting frame provided outside the box and defining an undercut section. A mounting mechanism is provided in the inner space, configured to fix the box on the mounting frame. The mounting mechanism has a clamp extending through an opening in the outer wall configured to engage with the undercut portion of the mounting frame. A lever coupled to the clamp by a hinge allows operation of the clamp between a clamping position and a non-clamping position. The lever is accessible from outside the box.

Abstract: A method for producing a coated and printed glass panel, includes a) providing a glass substrate having a metal-containing coating on a first surface and a polymeric protective layer with a thickness d arranged on this metal-containing coating, b) removing the polymeric protective layer in a first region using a carbon dioxide laser, c) removing the metal-containing coating within the first region only in a second region using a solid-state laser such that an edge region is created, in which the metal-containing coating is intact and in which the polymeric protective layer was removed in step b), d) applying a ceramic ink only in the first region, e) heat treating the glass panel at >600° C., wherein the polymeric protective layer is removed on the entire first surface, in the edge region, the metal-containing coating is dissolved by the ceramic ink lying above it, and the ceramic ink is fired.

Abstract: An apparatus for adjusting a tilt angle of a plurality of slats in a window blind is disclosed. The window blind includes a headrail having disposed therein a shaft that causes the tilt angle of the slats to be adjusted when the shaft is rotated. The apparatus comprises a first bevel gear, a second bevel gear in mechanical communication with the first bevel gear and coupled with the shaft, and a motor coupled to the shaft. Actuation of the first bevel gear causes a corresponding rotation of the shaft to adjust the tilt angle of the slats, and actuation by the motor causes a rotation of the shaft to adjust the tilt angle of the slats.

Abstract: A blind body actuator used in a non-cord window blind is provided to include a casing, a winding mechanism, a set of guide units, a set of lift-cord wheels, and a set of lift cords. The winding mechanism is rotatably mounted in the casing and includes a plurality of meshed and juxtaposed winding wheels and volute springs wound around the abovementioned winding wheels. The lift-cord wheels are meshed with the winding wheels and employed to wind the lift cords. The guide units contain some cylinder rollers that are employed for winding the lift cords based on actual needs.

Abstract: A connection head includes a first body indentation to accommodate a support recess with a second fixed support, a second body indentation flanked by the first body indentation, the first and second body indentations being divided by a body edge, and an element applicable to the side body surface, having an indentation. When the element is applied, the indentation is connected to the second body indentation of the main body to accommodate at least one support bracket of a first fixed support.

Abstract: A roller blind assembly having a roller with a longitudinal axis, and a generally rectangular screen formed from a flexible sheet material with an upper marginal edge securable to the roller. The roller has first and second roller sections which are substantially cylindrical and axially aligned, and an intermediate section located between and telescopically received within the first and second roller sections, allowing adjustment of the roller length. The upper marginal edge is provided with a releasable fastening device having a substantially rigid elongate member adapted to engage the first and second roller sections, bridging the gap therebetween by the intermediate section, when the screen is attached to the roller to support the screen when it is wound onto the roller releasably attaching the screen to the first and second roller sections.

Abstract: A window shade mounting system for use with a curtain wall structure comprising: a mounting plate secured to a building material and the mounting plate is disposed in a cavity defined by a curtain wall assembly, the building material, a fire block; a support plate removable carried by the mounting plate; a bracket attached to the mounting plate having a first end configured to bear against the mounting plate; a member included in the bracket wherein the member is configured to engage a roller window shade assembly and the member configured to limit rotation of at least a portion of the roller window shade assembly; a passage defined in the bracket for receiving a wire that travels from the cavity, through the passage and connects to a roller shade assembly motor included in the roller window shade assembly; and, a decorative plate attached to the support plate.

Abstract: An architectural covering including a motor assembly is provided. The covering may include a head rail, an end cap enclosing an end of the head rail, a roller tube rotatably supported within the head rail at least partially by the end cap, and a motor assembly including a housing in splined engagement with the end cap to non-rotatably secure the motor assembly to the end cap. The motor assembly may be received at least partially within the roller tube and may be in driving engagement with the roller tube. A covering material may be attached to the roller tube such that rotation of the roller tube extends or retracts the covering material.

Abstract: A ladder rung accessory assembly includes first and second caps have a respective base that is shaped to cover respective rung openings of a selected rung of an extension ladder to reduce acoustic noise during transport. Each cap includes a guide member that is received in the respective opening to position the attached base. Channels formed through the bases and guide members are shaped to receive a cable tie passing through each cap and the selected rung. The first cap is held against the ladder by a head of the cable tie and the second cap is held against the ladder by an internal pawl locking mechanism of the second cap that ratchets against a toothed tape section of the cable tie.

Abstract: The present disclosure relates to earth-boring drill bit with brazed-in rolling elements for depth-of-cut control. The earth-boring drill bit includes a bit body, a blade having an exterior surface and defining at least one pocket, and a DOCC element positioned within the blade. The DOCC element includes a walled retainer positioned within the pocket. The walled retainer includes retainer side walls and an endcap attached to the retainer side walls at an end of the walled retainer. The DOCC element further includes a rolling element positioned within and partially enclosed by walled retainer, with a portion thereof extending above the exterior surface of the blade. The disclosure further includes the DOCC element and a method of installing it in the pocket defined by the blade.

Abstract: Disclosed are systems for securing a bend stiffener to a riser in an offshore energy production facility. In one system, the lower end of the bend stiffener has a magnet that repels a magnet in a clamp on the riser a distance below the bend stiffener. The magnets repel one another with a force during operation to decelerate falling and prevent contact between the clamp and the bend stiffener. Methods are provided for retrofitting a riser system by adding the magnets. In another system, the riser has an upper portion and a tapered portion immediately below the upper portion. The outer diameter of the tapered portion increases such that the tapered portion can be friction fit into the lower end of the bend stiffener in the event that the bend stiffener is forced down or free falls onto the riser.

Abstract: An anchoring assembly for securing a cable having both an optical fiber and an electrical conductor in order to provide a conductive pathway to a downhole tool. The anchoring assembly has a head and tail each having a throughbore with anchor receiving portions. An anchor with a deformable portion maybe inserted into the anchor receiving portions and the head and tail drawn together about the anchor. The anchor receiving portions have a narrowing diameter, which, upon abutment with the anchor causes the deformable portion of the anchor to deflect inward and secure a cable inserted therein. A conductive body is provided in the head or tail for coupling with the cable and providing a conductive pathway to a downhole tool.

Abstract: A drill pipe comprises a drill pipe body having a drill pipe body outer diameter and a drill pipe body inner diameter, wherein the drill pipe body outer diameter is from about 5.1-inches to about 5.4-inches and the drill pipe body inner diameter is from about 4.4-inches to about 4.6-inches; and a tool joint comprising a rotary shoulder box connection; wherein the drill pipe has an average diameter ratio and wherein the average diameter ratio is from about 1.32 to about 1.58 for a production hole from about 7?-inches to about 12¼-inches. Methods of using the drill pipe are also disclosed.

Abstract: A subsea drilling method for controlling the bottom hole annular pressure and downward injection rate during mud cap drilling operations from a mobile offshore drilling unit with a low pressure marine riser and subsea blowout preventer. The method called controlled mud cap drilling uses the hydrostatic head of a heavy annular mud (fluid) managed or observed in order to balance the highest pore pressure in the well and to control the injection rate, by using a subsea mud lift pump and a control system to regulate the process.

Abstract: A solids discharge assembly for disposing of oil and gas well treated solids, the assembly including a discharge eductor and solids valve. The eductor includes a solids inlet to receive the treated solids, and, to transfer the treated solids to a chamber of the eductor, a fluid inlet to receive a motive fluid and transport the motive fluid through a tapered nozzle coupled to the fluid inlet, a tip of the tapered nozzle located in the chamber, and a discharge outlet to receive a discharge mixture of the treated solids and the motive fluid, from the chamber, The chamber has a reduced pressure of less than atmospheric pressure when the motive fluid is streaming from the fluid inlet to the discharge outlet. The solids valve is located in a solids conduit coupled to the solids inlet of the eductor. The solids conduit is evacuated.

Abstract: A drilling mud screen comprising: a body having a first end and a second end and a centerline, wherein the first end and/or the second end of the body has a means to engage a drilling mud screen puller/installer tool; a drilling mud inlet at the first end of the body; a filter having a first end, a second end, and openings, wherein the filter is fluidly connected to the second end of the body via a first connection and/or an optional first end retaining ring; a drilling mud outlet at the openings of the filter; and a second end cap fluidly connected at the second end of the filter via a second connection, wherein the filter has an optional retaining ring disposed between the first connection and the second connection is disclosed.

Abstract: A method and system for synchronizing downhole tractor and surface winch deployment includes deploying a tractor and deploying wireline from a winch, obtaining readings of wireline tension, and adjusting the speed of the tractor to match the winch speed. If the tractor and winch speeds appear substantially matched, periodically adding and/or removing slack in the wireline while observing the wireline tension can confirm if the tractor and winch are still synchronized.

Abstract: A casing section mill has a main body with cut-outs to accommodate casing section mill blades mounted thereon, and stabilizer inserts mounted in the cut-outs below the blades. The stabilizer inserts yield an outer diameter substantially the same as the drift inner diameter of the casing being milled, thereby providing positive centralization and stabilization of the blades. The casing section mill may be rotated by a downhole positioned positive displacement motor in the drillstring, by drillstring rotation from the surface, or a combination of downhole positive displacement motor and drillstring rotation.

Abstract: The disclosed jarring device generates two jarring impacts at the end points of a reciprocating hammer assembly. Initially, flow of pressurized fluid through the jarring device is obstructed by a deformable member. The resulting increase in fluid pressure upstream of the deformable member causes compression of a spring and downstream movement of the hammer assembly to generate a first jarring impact. A further increase in fluid pressure beyond a threshold, causes a release of the obstruction by either deforming the member or by slicing it by pushing it through a slicer. Releasing of the obstruction causes decompression of the spring, and upstream sliding of the hammer assembly to generate a second jarring impact.

Abstract: An extendable wellbore tool may include a housing, a telescopic cylinder, and one or more hydraulic actuators. The telescopic cylinder may be disposed within the housing and may include two or more cylinders configured to extend and retract relative to each other. The one or more hydraulic actuators may be connected to the telescopic cylinder via a link arm, and may be configured to extend and retract the telescopic cylinder relative to the housing.

Abstract: A polished rod sealing device for an oil pumping machine includes a built-in stuffing box. The built-in stuffing box is arranged inside oil pipe enlargement press cap and can seal the polished rod of the oil pumping machine. The sealing device maintains dynamic coaxiality between the polished rod and the stuffing box, and reduces eccentric wear of the sealing packing resulted from the polished rod. The sealing device also provides lubrication between the polished rod and the sealing packing.

Abstract: Systems and methods for landing a tubing hanger in a wellhead and then orienting a tubular housing (e.g., tree, spool, or flowline connection body) relative to the tubing hanger while landing the tubular housing on the wellhead are provided. The systems may include a tubing hanger alignment device, wherein the tubing hanger alignment device includes one or more hydraulic, electric, or fiber optic lines extending therethrough and one or more couplings disposed on a lower end thereof. The tubing hanger alignment device is configured to couple one or more hydraulic, electric, or fiber optic lines on the tubular housing with one or more hydraulic, electric, or fiber optic couplings on the tubing hanger during landing of the tubular housing onto the wellhead regardless of a relative orientation of the tubing hanger and the tubular housing with respect to the wellhead.

Abstract: An autonomous BOP system is provided for stopping an uncontrolled flow of formation hydrocarbons comprising two or more sensors distributed along a length of a subsea blowout preventer to monitor a drill pipe inside a blowout preventer and measure critical parameters. A computer using predictive-software monitors a blowout preventer along with material critical parameters and calculates a blowout preventer configuration and sequence to arrest a well blowout. Blowout preventer components are fine-tuned and operational modes are added to aid an arrest of a well blowout under realistic conditions.

Abstract: On a production tubing positioned in a casing string, a bypass adapter is coupled to a packer tool. The bypass adapter comprises an inner mandrel positioned in an inner bore of the packer tool. Injection gas flows between the production tubing and the casing string, through a plurality of ports, in a space located inside the inner bore of the packer tool and outside of the inner mandrel, thus bypassing the packer tool. This injection gas then flows down the outside of a tailpipe located below the packer tool. Fluid produced by the well mixed with this injected gas flows inside the tailpipe, through the inner mandrel, and into the production tubing.

Abstract: A downhole expandable liner hanger positioned in a subterranean wellbore. The liner hanger may comprise a liner and an expansion element. The expansion element may comprise one or more seal elements bonded to the expansion element in an open-ended containment system, wherein each of the one or more seal elements comprises at least one garter spring.

Abstract: The present invention relates to an annular barrier for providing zonal isolation in an annulus downhole between a well tubular metal structure and another well tubular metal structure or a wall of a borehole, comprising a tubular metal part with an outer part face, configured to be mounted as part of the well tubular metal structure an expandable metal sleeve surrounding the tubular metal part forming an expandable space there between, the expandable metal sleeve is configured to be expanded in a well downhole from a first outer diameter to a second outer diameter to abut against the well tubular metal structure or the wall of the borehole, the expandable metal sleeve having a first end, a second end, an outer face, and a longitudinal extension wherein the first end of the expandable metal sleeve has a mechanical connection, and wherein the first end of the expandable metal sleeve is connected to the tubular metal part by means of a bite connection comprising a cutting ring comprising an outer ring face havi

Abstract: A well tool attachment includes a tubular body with a bore therethrough extending along a longitudinal axis, wherein the tubular body is configured to seat in a shoe track of a well casing. A plurality of partitions are suspended from the tubular body, dividing the bore of the tubular body into a plurality of segments extending axially through the tubular body. The partitions are configured to break up cement slurry entering the bore of the tubular body into a plurality of cement segments to facilitate drilling after downhole cement sets.

Abstract: A frac tree coupled to a wellhead is connected to either flowback equipment or zipper modules using a single straight-line connection of pipes, valves, and/or frac iron that define a straight-line pathway for fluid, gas, or flowback materials. The disclosed single straight-line connections referenced herein may be used in pressure pumping operations to deliver hydraulic fracturing fluid (“frack fluid”) to a frac tree for delivery to a wellhead or for carrying flowback from the wellhead to a flowback-collecting equipment. To dramatically reduce the wear-and-tear on the frac tree, blocks at or near the top of the frac trees are strategically lined with a high-strength wear-resistant material internally at points where frack fluid or flowback changes direction to flow toward or away from the single straight-line connections.

Abstract: A rigid valve block body and a method for determining fluid flow direction are disclosed. The valve block body includes a first fluid inlet and a further fluid inlet at opposed sides of a rigid valve block body. A first fluid outlet of the valve block body and a further fluid outlet of the valve block body are disposed in a spaced apart relationship. A first V-shaped fluid communication passageway comprises two passageway portions each extending within the valve block body from a first common root region proximate to the first fluid inlet. A further V-shaped fluid communication passageway comprises two further passageway portions each extending within the valve block body away from a further common root region proximate to the further fluid port. An end region of each passageway portion of the first V-shaped fluid communication passageway meets an end region of a respective passageway portion of the further V-shaped fluid communication passageway proximate to a respective fluid outlet.

Abstract: A modular hydraulic intensification system includes a housing configured to be deployed within a subsea landing string. The modular hydraulic intensification system also includes multiple hydraulic intensifiers positioned within the housing, wherein each hydraulic intensifier includes a first chamber configured to fluidly couple to a hydraulic fluid supply and a second chamber configured to fluidly couple to one or more landing string valves within a lower portion of the subsea landing string. The modular hydraulic intensification system further includes a shuttle valve fluidly coupled to the respective second chambers of the multiple hydraulic intensifiers, wherein the shuttle valve is configured to enable flow of an output fluid across the shuttle valve from the respective second chambers of the multiple hydraulic intensifiers and to block backflow of the output fluid across the shuttle valve toward the respective second chambers of the multiple of hydraulic intensifiers.

Abstract: Certain aspects and features of the disclosure relate to a valve device for use in a wellbore. In one example, the valve device includes a body containing swell fluid, a swellable elastomer, and a piston. The swell fluid can contact the swellable elastomer, causing the swellable elastomer to swell. The swellable elastomer can swell and contact the piston. The swellable elastomer can move the piston from a first position to a second position. In the second position, the piston can open, close, or restrict one or more flow paths through the valve device.

Abstract: A choke can include a variable flow restrictor, external ports in communication with a flow passage respectively upstream and downstream of the flow restrictor, and sensor(s) in communication with the external ports. A method can include flowing a well fluid through a flow passage in a body of a choke including a variable flow restrictor, measuring a pressure differential between external ports in communication with respective upstream and downstream sides of the flow restrictor, and operating the flow restrictor, thereby varying a restriction to the flow through the flow passage, in response to the measured pressure differential. A well system can include a well fluid pump, a flow choke including a variable flow restrictor operable by an actuator that includes a displaceable stem and a stem seal that isolates the actuator from the well fluid in the flow choke, and a control system that operates the actuator.

Abstract: A system for stimulating a subterranean formation that has a wellbore formed within the subterranean formation; and a tubular disposed within the wellbore. There is a first frac valve disposed within the tubular, the first frac valve having a first sleeve in a closed position, and further configured to move to an open position. There is an at least a second frac valve disposed within the tubular, the second frac valve having a respective sleeve in a respective closed position, and further configured to move to a respective open position. A dart is configured to pass through the first frac valve without moving the first sleeve, and to subsequently engage the second frac valve to move the respective sleeve to the respective open position.

Abstract: Systems and methods describe to a downhole tool with an expandable ball seat. More specifically, the systems and methods include a sliding downhole tool with a moving screen, wherein the screen is provisionally protected by a temporary member.