Abstract: A door lock assembly operates a deadbolt between unlocked and locked positions. It includes an actuator, a ring, and a spring member. The actuator includes an integral arm, that extends inwardly, to the center of the ring, and the arm has a cam provided upon the center axis, and receives the torque blade from center key cylinder. In the preferred embodiment, when the ring is turned in a clockwise direction, it locks the deadbolt of the latch bolt assembly, by shifting it to a locking position, and all of this can be achieved because the key cylinder is on a center axis, and the axis of the latch bolt assembly and deadbolt intersects that same center axis in their operation.

Abstract: A gate lock (10) includes a body (11), which in turn includes a latch (12) that can house a key (13) for opening the lock (10) and a stop element (14) having a first configuration of engagement on at least a part of the gate. The lock (10) further includes a slide (17), which slides with respect to the body (11); the stop element (14) is slidably constrained to a guide element.

Abstract: The invention relates to a lock for a fuel tank or tailgate in a vehicle, comprising a locking bolt (1) which can be adjusted between an open and closed position by opening and closing the cap or the tailgate. Said cap lock, in the housing (2) of the locking device, is positively driven counter to the force of a compression spring (4) in the direction of its longitudinal axis (6) and counter to the force of a torsion spring (3) about its longitudinal axis (6).

Abstract: A striker assembly includes a striker having an attachment portion, a shaft portion having a cylindrical outer surface, and a shoulder portion between the shaft portion and the attachment portion. The striker assembly also includes a striker sleeve having a wall that has an inner surface defining an interior space having first and second openings. The wall has corrugations such that the inner surface defines a plurality of concave portions and joining portions that interconnect the concave portions. The concave portions and the joining portions extend from the first opening to the second opening. The shaft portion is inside the interior space and the outer surface of the shaft portion contacts the joining portions of the inner surface of the striker sleeve.

Abstract: An outside door handle device for a vehicle may include a handle base having a hinge hole and a lever hole on opposite sides thereof, respectively, and having a shaft coupling part and a slider groove on the side of the lever hole, a door handle having, on opposite sides thereof, respectively, a handle hinge to be inserted into the hinge hole and a handle lever to be inserted into the lever hole, a slider slidably mounted along the slider groove and coupled with the handle lever when the handle lever may be inserted into the lever hole, and a balance weight having a balance shaft to be rotatably inserted into the shaft coupling part and a balance lever to which an operation force of the door handle may be selectively transmitted.

Abstract: A sash latch for retractable engagement with a side jamb of a window includes a lower member, which is fixed to a sash of the window, and an upper member with an extension. The upper member and extension slide relative to the lower member so that the extension can extend beyond the sash and can retract into the sash. In use, the extension extends beyond the sash and into the side jamb. A planar surface of the extension locks the sash to the side jamb. The extension also has a notch located opposite the planar surface. The notch prevents the extension from retracting into the sash when a heavy wind load is placed on the sash. Advantageously, this inhibits the sash from swinging dangerously inward under such a condition and reduces the possibility of damage or death.

Abstract: An emergency device for a household appliance of the type comprising a door that has a prong is described. The emergency device has an emergency member, movable between a rest position and an operating position, in which the emergency member engages with the prong of the door when the door is in a closed position, and control means, capable to hold the emergency member in the rest position. The control means has a security element, electrically connected to a control logic of the household appliance, such that when the safety element is crossed by a suitable current intensity and/or when a temperature surrounding the safety element exceeds a preset threshold, the security element melts releasing the emergency member, the emergency member passing irreversibly from the rest position to the operating position, engaging with the prong of the door when the door is closed.

Abstract: A fastener with a breakaway and methods of using the same. In one embodiment the fastener is a screw having a head and elongated stem, adapted to be easily manipulated by a user when using the screw as a fastener in a hinge or joint. A way of holding a screw by providing a breakaway tab or non-threaded portion of the elongated stem which can be used to align and insert the screw into a screw hole in the process of engaging threads in the screw hole with threads of the screw. After engaging the threads in the screw hole, such as after the screw has been essentially completely inserted into the screw hole, the breakaway tab or non-threaded portion of the elongated stem of the screw may be broken off at a breakaway and discarded.

Abstract: There is disclosed an anti-sag hinge (10) which includes a mounting flange assembly (12) pivotally coupled to a strap assembly (15). The strap assembly includes a strap (31) extending from a cylinder portion (32). The strap includes an interior recess (68) and a flexible, rubber bumper or cover (90) is configured to fit snugly into the top end of the strap recess. The recess is defined by the peripheral sidewalls (74) of the strap which extend to the most outboard portion of the hinge.

Abstract: A damper device for a furniture hinge. Damper device may comprise a movable cup seat provided on the furniture door body and a base provided on the main body of furniture. The base may be connected with one end of the hinge arm. Another end of the hinge arm may be hinged with the movable cup seat. A damping mechanism may be mounted in the cup body of the movable cup seat through a fixing seat. The shape of the fixing seat may match with the cup body. A slide slot may be provided on the fixing seat, permitting the damping mechanism to linearly slide on the slide slot. A working slope for closing hinge may be provided on the damping mechanism and/or hinge arm, so that both the damping mechanism and the hinge arm are connected at least when the hinge is closed.

Abstract: An elastic abutting device disposed on one link of a two link mechanism includes a base member, a bearing member, a latch member, and an elastic member. The base member has an accommodating groove. The bearing member is disposed in the accommodating groove, wherein the bearing member has a first propping portion, a second propping portion, and a through hole. The latch member defines a central axis, and the latch member has an abutting portion which is partly exposed out of the through hole and a retaining portion which is disposed correspondingly to the abutting portion. The elastic member is disposed between the first propping portion and the second propping portion, wherein two opposite terminal ends of the elastic member respectively have a first side end portion and a second side end portion disposed correspondingly to the first side end portion.

Abstract: A damper apparatus includes a piston having a flange-shaped piston main body and piston rods which project from both ends of the piston main body, a cylinder having a cylinder main body which accommodates the piston main body slidably and cylindrical portions which support slidably the piston rods, respectively, a fastener which is attached to the one cylindrical portion so as to secure the cylinder to an opening/closing member, and a coil spring which biases the one piston rod to project from the other cylindrical portion such that a distal end portion of the piston rod abuts a circumferential edge of an opening portion of a vehicle.

Abstract: A locking post for a folding door having two face panels and two end panels, the panels extending the length of the post. A plurality of relatively short, spacers are in the post, including a spacer at each end of the post. First fasteners fasten one face panel to each spacer on one side of each spacer and fasten the other face panel to each spacer on the side of each spacer opposite the one side, the face panels parallel and aligned. Second fastens detachably fasten one end panel to both face panels along one side of the face panels and detachably fasten the other end panel to both face panels on the other side of the face panels, the end panels parallel, the face panels and end panels together providing a tubular enclosure for the spacers.

Abstract: An auxiliary pane is attached to a window having an existing primary window pane using a plurality of mounting members, each formed of a first flange and a second flange joined perpendicularly to one another at an apex so as to be substantially L-shaped. The first flange of each mounting member is secured to an inner frame surface of the perimeter frame of the window using a curable adhesive material. A gauge having first and second gauge surfaces at a prescribed distance is used to align the second flanges of the mounting members into a common plane by abutting the first gauge surface against the primary window pane and adjusting each mounting member to abut the second flange thereof to the second gauge surface of the gauge before the curable adhesive material has cured. Once cured, the auxiliary pane is magnetically coupled to the second flanges of the mounting members.

Abstract: Hollow core door apparatus for preventing the build up of pressure in a room having a register through which air flows into the room and the door includes an inside door skin and an outer door skin, and the door skins includes openings in which a box is disposed. The box includes a center panel and at least a single opening in or through the center panel; the box also includes an inside panel and an outside panel, both of which panels are secured to and spaced apart from the center panel. The inside and outside panels have peripheral openings and which peripheral openings define areas at least as great as the area of the opening in the center panel and are offset from the opening in the center panel to provide for a non-linear flow of air through the door to prevent the build up of pressure in the room. An embodiment combining a noxious gas absorbent material with the pressure build up prevention capability is also illustrated.

Abstract: Stile and rail door apparatus for preventing the build up of pressure in a room having a register for a forced air system through which air flows into the room includes hollow core stiles and rails and which hollow cores define a chamber and a panel having an outer periphery secured to spacers to secure the outer periphery of the panel within chamber to provide a perimeter air flow about the panel. Air flow from the room is through the door by flowing into the chamber and about the outer periphery of the panel and outwardly from the chamber and outwardly from the room in a non linear manner.

Abstract: A safety device for a window covering comprises a head rail and a shade panel extending from the head rail. A lift cord extends along one side of the shade panel between the head rail and the bottom of the shade panel. A safety device engages the lift cord to control the movement of the lift cord away from the shade panel. The safety device may also shroud the lift cord to limit access to the lift cord portion.

Abstract: The present invention provides a mechanism for controlling the spacing between louvers, e.g. in a blind. The louvers are secured to a top rail and a bottom rail. The connections are at an angle to each other so that the louvers are naturally twisted. The louvers extend through slots in a comb 16 that can be moved up and down the louvers. The function of the comb is to alter the position of the twist as it is moved up and down the louvers, thereby opening and closing the blind.

Abstract: The invention discloses a louver roller system with a cam pin turning mechanism, including a base and a top cover, wherein a roller mechanism and a cam pin turning mechanism are mounted on the base, the roller mechanism is wound with ladder tapes, the roller mechanism is in axial connection with the cam pin turning mechanism, and the roller mechanism and the cam pin turning mechanism are driven to rotate by a square shaft. The roller mechanism controls horizontal rising and falling of secondary louver blades, and the roller within the roller mechanism rotates to wind or unwind the ladder tapes thereon and sequentially drives various secondary louver blades to rise and fall horizontally. When various secondary louver blades rise to a predetermined position, the roller drives the cam pin turning mechanism to bring a turning cylinder to rotate, so as to achieve turning of all louver blades.

Abstract: An example door includes a track and a curtain that includes a leading section. The curtain is to be in a breakaway state associated with a folded condition when the lateral section in an area proximate the leading section is dislodged from the track and folded over onto a main section to define an enfolded space. The curtain is to be in the breakaway state associated with an unfolded condition when the lateral section in the area proximate the leading section is dislodged from the track but not folded over onto the main section. The example door also includes an unfolder to extend into the enfolded space as the leading section moves toward an open position while the curtain is in the folded condition.

Abstract: A top drive includes a hydraulic motor in fluid communication with first inlet for a supply of pressurized drilling fluid. A drill string adapter is mechanically coupled to the hydraulic motor and is in fluid communication with the first inlet.

Abstract: Injection of gas into a managed pressure drilling system to provide for operation of the drilling system in a downhole pressure window defined by the pore pressure of a formation being drilled and a fracture pressure of the formation. Gas injection being controlled so as to produce the desired downhole pressure without causing large oscillations in borehole pressure.

Abstract: A technique facilitates control over the orientation of a bottom hole assembly. The bottom hole assembly comprises an orienting tool having a dual-spline drive which, in turn, comprises a first lead screw portion and a second lead screw portion having threads of a first pitch and a second pitch, respectively. A motor is connected to the dual-spline drive to impart rotational motion with respect to the first threads having the first pitch. A difference in pitch between the first pitch and the second pitch enables the rotational motion imparted by the motor to be converted to a slower, higher torque, output via the second lead screw portion. As a result, the orienting tool is able to provide a selective, high torque, low-speed adjustment to the drilling orientation of the bottom hole assembly.

Abstract: A whipstock is supported adjacent the lower end of a string during the drilling of the lateral. It has no integrated anchor. The BHA is delivered through the string that supports the whipstock. After a lateral is drilled the BHA is retracted and the support string is manipulated to advance the whipstock to a new location for proper orientation with a gyroscopic tool. The BHA is then advanced through the support string for drilling of another lateral in the same trip in the hole. The process can be repeated as many times as needed. Peripheral pads on the lower end of the whipstock push the lower end of the whipstock ramp to the borehole wall for proper tracking of the lateral. The laterals can be in open or cased hole and the support string can have circulation ports near the whipstock to cool the BHA in geothermal wells.

Abstract: A method of forming a wellbore includes providing a drilling assembly comprising one or more lengths of casing and an axially retracting assembly having a first tubular; a second tubular at least partially disposed in the first tubular and axially fixed thereto; and a support member disposed in the second tubular and movable from a first axial position to a second axial position relative to the second tubular, wherein, in the first axial position, the support member maintains the second tubular axially fixed to the first tubular, and in the second axial position, allows the second tubular to move relative to the first tubular; and an earth removal member disposed below the axially retracting assembly. The method also includes rotating the earth removal member to form the wellbore; moving the support member to the second axial position; and reducing a length of the axially retracting assembly.

Abstract: A roller cone drill bit may include optimally designed bearing structures and cutting structures. The roller cone drill bit may include three cone assemblies rotatably mounted on respective spindles via respective bearing structures. Each cone assembly may have a respective cutting structure with a minimal moment center located along each respective axis of rotation. Each respective bearing structure has a center point located proximate each respective minimal moment center.

Abstract: Cutting structures for use with downhole tools in subterranean boreholes include a blade, a plurality of primary cutting elements coupled to the blade, and at least one secondary element rotationally leading the plurality of primary cutting elements in a direction of intended rotation of the cutting structure. The at least one secondary element is coupled to the blade proximate a leading surface of the blade and comprises at least one of a rubbing surface and a cutting surface. An exposure of at least one primary cutting element of the plurality of primary cutting elements is greater than an exposure of the at least one secondary element. Downhole tools such as reamers include cutting structures. Methods of enlarging a subterranean borehole include reaming a borehole with cutting structures.

Abstract: A cutting device includes, at least one stack of cutting elements attached to a cutter surface having, a first element and a second element attached to the cutter surface. A third element is attached to the first element and the second element. The three elements are sized and shaped such that prior to attachment to the cutter surface the three elements are restable in a stable manner on the cutter surface due to gravity alone. A plane-defined-surface defined by one of the two planes of a modified gilmoid of the third element positioned further from the cutter surface is oriented at an angle of about 35 to 55 degrees relative to the cutter surface.

Abstract: A work string for completing long lateral well bores is assembled using small diameter drill pipe having a nigh make-up torque for a curved section and lateral bore of a well. A larger diameter drill pipe is used in the vertical section of the well to facilitate pushing the small diameter drill pipe through the long lateral bore.

Abstract: A centralizer comprises a first collar, a second collar, a plurality of bow springs coupling the first collar to the second collar, and a plurality of particulates disposed on an outer surface of at least one bow spring. One or more of the first collar, the second collar, and the bow springs comprises a composite material. In some embodiments, the centralizer comprises a third collar, wherein the plurality of bow springs comprise a first portion of bow springs and a second portion of bow springs, and wherein the first portion of the bow springs couple the first collar to the third collar and the second portion of the bow springs couple the second collar to the third collar.

Abstract: The present invention is an add-on tool to the standard barrel wrench that comprises a heavy duty T-shaped member and a foot ring where the operator fits their foot into the ring and applies force. Using the device of the present invention the operator no longer needs to stand on an angled surface and hope the barrel will instantly snap open after a few bounces without slipping and falling. The interior diameter (ID) of the foot ring of the device is about 6.5 inches which offers plenty of room for the operator to insert their foot in and apply pressure to the Barrel.

Abstract: An attachment is described that is configured for attachment to an arm of a piece of heavy construction equipment. The attachment is configured to rotate a section of pipe during break out (i.e. disconnection or disassembly) from another section of pipe and/or make up (i.e. connection or assembly) with another section of pipe. The attachment is configured to break the joint or torque the joint to a predetermined torque value, unthread or thread pipe, and lift the pipe under the power of the heavy construction equipment.

Abstract: A floating clamping device for an injection head of a continuous oil pipe, including a drive sprocket, a transmission chain, a supporting plate, a pushing plate, clamping oil cylinders and a clamping assembly. At least two clamping oil cylinders are installed on the supporting plate fixedly. The pushing plate is fixed on the supporting plate through a pin shaft. The clamping assembly includes a saddle-shaped clamping block, a clamping block seat and rollers which are mounted on the clamping block seat. The clamping assembly is mounted on the transmission chain. A piston rod of the clamping oil cylinder is pressed on one face of the pushing plate, while the other face of the pushing plate is pressed on the rollers. The pushing plate has a simple structure and is convenient for maintenance; the clamping device has a compact structure and a reduced volume.

Abstract: A drill string tubular component for use in an oil or gas well, in the form of a tubular having a central bore and a mechanism for mobilizing drill cuttings comprising at least one radial impeller (30) configured to apply radial thrust cuttings passing it, the radial impeller being located between first and second axial impellers (10, 20) configured to apply axial thrust to the fluids in opposite directions. Typically helical components of the first and second axial impellers extend in respective opposite directions, typically toward the radial impeller. Fluids are thus diverted radially away from the outer surface of the tubular component, and thereby enter a more turbulent region of the annulus, there reducing the tendency of the drill cuttings to settle out of suspension.

Abstract: A gas-separator for separating trapped gases from drilling fluids retrieved from a well-bore being drilled is disclosed. The gas-separator includes a cylindrical separator which is capable of rotating on its longitudinal axis when fluid and gases flow out through fluid ejection ports, which access the center bore of the cylindrical separator. The fluid ejection ports have a narrower cross-section towards the center bore and a wider cross-section at the opposite end, and are preferably aligned substantially tangentially with periphery of center bore, such that outflow of drilling fluid (and gases) from the center bore through the ejection ports induces a rotational torque on the cylindrical separator. Spinning of cylindrical separator enhances the gas-separation effect.

Abstract: This Application addresses maintaining a hydrostatic pressure exerted on a wall of a wellbore in different intervals of the wellbore. This is done by flowing a liquid through at least a pressure regulator in each interval, and wherein each pressure regulators regulates the amount of pressure exerted by the liquid on the wall of the wellbore. The amount of pressure may be maintained for a specific period of time. The wellbore is part of a soft subterranean formation.

Abstract: The present invention relates to a downhole tool comprising a tool housing for accommodating components of the downhole tool, the tool housing comprising; a first tool housing part having a first end face and a second end face, and an activation unit removably connected with the first tool housing part, the activation unit comprising: a second tool housing part, and a closing member removably connected with the second tool housing part, wherein the second tool housing part and the closing member together constitute a fluid-tight chamber wherein a fluid is retained, the fluid-tight chamber housing mechanical and/or hydraulic and/or electrical components, and wherein the activation unit may be separated from the first tool housing part while the closing member is connected with the second tool housing part. The invention further relates to a downhole system and to a method of performing services of a downhole tool.

Abstract: A latching assembly has a tubular housing having an inner surface that defines an inner bore and an outer surface. A latch moves between a latch position that extends out from the outer surface and an unlatched position that is retracted from the latch position. A latching actuator moves between a first axial position that moves the latch to the latch position and a second axial position that moves the latch to the unlatched position. A manual release moves axially in response to a mechanical force to selectively move the latching actuator to the second axial position.

Abstract: An improved downhole well control tool (“WCT”) allows for the control of in-situ fluid flow from a production well having one or more production zones. The WCT is installed in a tubing string in a zone to be controlled. An extensible flow is provided having a threaded connection on its lower end for coupling a pressure gauge or other instrumentation. The extensible flow nipple at its upper end is coupled to a lock body, thereby forming a fully-assembled extensible seal. The seal stem and the gauge may then be lowered using wireline tool into engagement with a tubular sub-assembly having a port. Advantageously, the exterior lateral channels of the extensible flow nipple seal the ports in the tubular sub-assembly. Then, for example, a pressure test may be performed.

Abstract: A coring extender for a coring tool is provided. The coring tool is deployable by a downhole tool into a wellbore. The coring extender includes a housing operatively connectable to the downhole tool, a mandrel, and seals. The housing has fluid chambers therein. The mandrel is positionable in the housing, and includes a locking tube operatively connectable to the housing and a coupling tube operatively connectable to the coring tool. The coupling tube is adjustably positionable relative to the locking tube such that a length of the mandrel is adjustably defined therebetween. The coupling tube has an outer surface slidably positionable along an inner surface of the housing. Seals are positionable between the mandrel and the housing to define a fluid pocket to isolate the fluid therebetween as the coupling tube moves along the housing whereby the fluid permitted to flow about the fluid pocket to balance between the fluid chambers.

Abstract: A debris removal device for subterranean use features a debris laden inlet tube within a housing to define a debris collection space at the lower end of the housing. An eductor draws the debris laden fluid to the top of the inlet tube where the flow stream is returned to a downhole direction with discrete passages formed between the housing and the inlet tube by spaced parallel plates. The plates feature extending tabs on diametrically opposed lower ends of the plates. As a result flow heading back downhole can release debris and turn back uphole in passages defined between the outside of the plates and the inside wall of the housing. The tabs allow the flow turning uphole to make a greater radius turn because of a crossing over effect created by the tabs. There is less turbulence and narrower width to the flowing stream going uphole.

Abstract: Implementations described herein are directed to a pressure pulse well tool, which may include an upper valve assembly configured to move between a start position and a stop position in a housing. The pressure pulse well tool may also include an activation valve subassembly disposed within the upper valve assembly. The activation valve subassembly may be configured to restrict a fluid flow through the upper valve assembly and increase a fluid pressure across the upper valve assembly. The pressure pulse well tool may further include a lower valve assembly disposed inside the housing and configured to receive the fluid flow from the upper valve assembly. The lower valve assembly may be configured to separate from the upper valve assembly after the upper valve assembly reaches the stop position, causing the fluid flow to pass through the lower valve assembly and to decrease the fluid pressure across the upper valve assembly.

Abstract: A subsea energy storage for well control equipment, wherein stored energy near a well on the sea floor monitors and activates well control equipment independently of, or in conjunction with, hydraulic energy. Energy to the subsea energy storage can be supplied by surface umbilical, remotely-operated vehicle, or by subsea electrical generation from stored hydraulic energy. Stored electrical energy may also recharge stored hydraulic energy. A subsea control system is configured to record data, compare the data to predetermined event signatures, and operate the well control equipment with stored electrical energy.

Abstract: A segmented seat adapted to be placed in subterranean wellbore equipment and engaged by an obturator. The segmented seat includes an annular body that is radially divided into a plurality of separate segments, the annular body defining a central bore extending axially therethrough, a generally cylindrical outer wall, and an end wall; an annular seat formed on the end wall and extending about the central bore of the annular body, the annular seat being of a size and shape to engage the obturator; at least one recess formed into each of the segments and offset from the outer wall of the annular body so that at least a portion of the annular body is located radially between the outer wall and the recess; and a non-metallic material disposed within the recess and joining adjacent segments together.

Abstract: Disclosed herein is a segmented seat for use in wellbore servicing systems, comprising an annular-shaped seat with an upward facing surface for receiving an obturator, the seat defining a central passageway. The segments are locked together at their faces by protrusions and matching recesses.

Abstract: A downhole tool having a first packing element and a second packing element configured to synchronically set to selectively hydraulically isolate a portion of the wellbore. The movement of a pin along a j-slot track on a second sleeve sets the second packer in compression and the movement of a pin along a j-slot track on a first sleeve the first packer in tension after the second packer has been set. The j-slot track on the first sleeve has six different pin positions and the j-slot track on the second sleeve has four different pin positions. The pin positions and direction of travel of the j-slot tracks are adapted to permit the synchronized setting of the two packing elements to hydraulically isolate a portion of the wellbore. The wellbore may then be treated by flowing fluid out of a ported sub positioned between the packing elements.

Abstract: A platform is formed in a well below a target plug zone by lowering a thermite reaction charge into the well and igniting it, whereby the products of the reaction are allowed to cool and expand to form a platform or support in the well. A main thermite reaction charge is placed above the platform and ignited to form a main sealing plug for the well. In some embodiments an upper plug is formed by igniting an upper thermite reaction charge above the main thermite reaction charge. The upper plug confines the products of ignition of the main thermite reaction charge.

Abstract: The invention relates to cement compositions containing a metal silicide such as an alkali metal silicide or an alkaline earth metal silicide. Upon mixing with water, the metal silicide reacts to generate hydrogen gas, a silicate, and heat—each of which is advantageous for the large variety of uses to which cements are put. The invention relates to a foamable cement composition comprising about 99.999 wt % to about 98.5 wt % of a cement, and about 0.001 wt % to about 1.5 wt % of a metal silicide or a mixture of metal silicides. Concretes and grouts containing the cement composition are also disclosed. Other embodiments provide methods for forming cement structures, including in subterranean formations and wells.

Abstract: A configurable metering cartridge includes a body having a tortuous pathway between an inlet and an outlet, and the tortuous pathway includes a plurality of restrictors. At least one valve is in fluid communication with the tortuous pathway and is selectively positionable to allow or prevent fluid flow through one or more of the plurality of restrictors.

Abstract: A circulating valve assembly can include a valve controlling flow between an interior and an exterior of the assembly, another valve controlling flow between sections of a flow passage extending through the assembly, and an actuator that both opens one valve and closes the other valve in response to each of multiple positive pressure differentials from the interior to the exterior. A system for use with a well can include a circulating valve assembly controlling flow through a tubular string and a well tool connected in the tubular string downstream of the assembly. In one configuration of the assembly, the flow passes through the well tool. In another configuration, the flow passes from the tubular string to an annulus external to the tubular string, with the flow substantially bypassing the well tool. The assembly cycles between the configurations in response to alternating increases and decreases in the flow.