Abstract: A hollow hinge includes a first hollow component, a second hollow component and a plurality of support assemblies. The first hollow component has a first surface and a second surface opposite to the first surface, and a plurality of concave portions are disposed on the second surface. The second hollow component is disposed on the second surface of the first hollow component and a plurality of receiving portions corresponding to the concave portions are disposed on the second hollow component. The support assemblies are respectively contained in the receiving portions and continuously butt against the first hollow component through a force. The hollow hinge avoids friction between components and strengthens support, thereby prolonging durability and improving assembly and production yield rate.

Abstract: A hinge mounting structure is provided whose appearance can be improved. In a hinge mounting structure including a hinge (1) having a first piece (3) and a second piece (4) that are coupled together via a shaft (2) in such a manner as to be rotatable relative to each other, the first piece (3) being mounted on a side jamb (6), the second piece (4) being mounted on a door (5), the side jamb (6) is provided with a protruding portion (8) protruding forward of a wall surface, and a center (C) of the shaft (2) is placed backward of a front surface line (X) of the protruding portion (8) of the side jamb (6).

Abstract: A refrigerator includes a cabinet, a door for opening and closing the cabinet, and a hinge assembly for connecting the cabinet and the door, wherein the cabinet includes a rear wall and an opening provided opposite to each other, a direction from the rear wall towards the opening serves as a first direction, and when the door is in an opening process, the hinge assembly drives the door to move away from the cabinet in the first direction. Mutual separation of the door and the cabinet may be assisted under the action of the hinge assembly, thereby improving door opening smoothness.

Abstract: The present invention provides an anti-pinch detection method and system comprising: determining a first current change rate according to a current collected in a present period and a previous period; determining a second current change rate according to the current collected in the present period and a target period, there being N periods between the target period and present period; detecting whether a closure component encounters an obstacle according to the second current change rate. If yes, determining the stiffness of the obstacle according to the first current change rate; determining a real-time obstacle compression distance according to a contact position zero point and a motor position collected in real time; and determining a real-time anti-pinch force according to the stiffness of the obstacle and the real-time obstacle compression distance, and controlling a motor to reverse when the real-time anti-pinch force is greater than a preset anti-pinch detection threshold.

Abstract: A co-extruded safety contact strip includes at least one contact or switching chamber situated in a section or profile and containing contactor or switching strips. One end of the base of the section is pivotally connected to a first side part and the other end of the base can be form-lockingly locked onto a second side piece. A method for securing the safety contact strip is also provided.

Abstract: A truck is provided that includes a bed section located rear of a cab section. The bed section is bounded on each side by opposing first and second upward-extending sidewalls, respectively. The truck also includes a truck bed cover that sits over the bed section on at least the first and second upward-extending sidewalls, and includes a door portion to create selective accessibility to the bed section of the pickup truck. The door portion is movable with respect to the first and second upward-extending sidewalls between open and closed positons via an automatic bed cover drive assembly that moves the door portion between open and closed positons according to a plurality of velocities within a predetermined variance.

Abstract: A refrigerator and a controlling method thereof are provided. The refrigerator includes a main body including first and second doors, a first motor for opening the first door and a second motor for opening the second door, and a processor configured to, based on a user command for opening the door being obtained, start driving the first motor to open the first door, and after a first time from the time when the first motor has started being driven, start driving the second motor to open the second door.

Abstract: A door system includes a controller for controlling the door system. A user computer system transmits information to the controller over a wireless connection to modify operating parameters for controlling the operation of the door system. During installation of the door system sensors may be utilized to determine if the door system has been installed properly. The sensors may be used to identify if the door system is mounted level and plum, and to review the movement, vibration, speed, acceleration, force, or the like of the sensors, and thus, the components to which the sensors are operatively coupled in order to make adjustments to the door assembly. Furthermore, the operating parameters of the installed door system, may be cloned and provided to other door systems in order to quickly clone and distribute the operating parameters of one or more door systems to one or more other door systems.

Abstract: A retrofit module configured for use with a door closer having a pinion. The retrofit module generally includes a case, an output shaft, a motor, and a control assembly. The output shaft is rotatably mounted in the case, and is configured for rotational coupling with the pinion. The motor is mounted to the case, and is operable to rotate the output shaft in a door-opening direction. The control assembly is mounted to the case, and is configured to operate the motor to drive the output shaft in the door-opening direction in response to an actuating signal.

Abstract: The object of the invention is the hinge for controlled door closing and opening with damper which solves the technical problem of smooth and controlled closing and opening of the door before the end positions of the hinge, i.e. the open or closed position of the door. The damper fit surface (25) and the damper head fit surface (26) are always in contact with two of the limiting surfaces, i.e.

Abstract: A hydraulic door closer capable of reducing oil-pressure therein at high temperature, comprises a housing with an oil chamber, an oil storage cavity, and a piston in the housing of the hydraulic door closer. The oil storage cavity is in communication with the oil chamber; when the oil temperature increases, hydraulic oil in the oil chamber and oil storage cavity generates an increased oil pressure move the piston, whereby volume of the oil storage cavity is enlarged, such that oil from the chamber will flow into the cavity, to reduce the oil pressure of the chamber and cavity. When the oil temperature decreases, the oil pressure in the chamber and cavity is reduced, whereby the storage piston restores its original position, whereby volume of the cavity will be reduced, and the oil in the cavity flows back into the chamber. The pressure in the oil chamber is reduced when the hydraulic oil expands due to increased temperature to prevent failure of the seal and to avoid hydraulic oil leakage.

Abstract: An exemplary modular hold-open device is configured for use with a door closer comprising a body, a pinion rotatably mounted to the body, and an armature connected with the pinion. The modular hold-open device is configured to be mounted to the door closer, to selectively prevent rotation of the pinion by exerting on the pinion a resistive torque in a door-opening direction, and to cease exerting the resistive torque in response to a door-closing torque on the pinion exceeding a threshold torque to thereby permit rotation of the pinion in the door-closing direction.

Abstract: In an aspect, an insulation kit for insulating an interior side of a window is provided. The window includes a window pane and a window frame having a window aperture in which the window pane is mounted, and at least one surface on the interior side of the window which extends around an exterior edge of the window aperture. The insulation kit includes a adhesive member and a sheet of insulating, biodegradable film sized to be mounted to a surface of the window frame by the adhesive member so as to cover the window aperture, and being heat shrinkable to form an airtight seal, insulating the window pane on the interior side of the window. The sheet of film is constructed to be mounted to the at least one surface of the window frame for a period of at least four months before degradation of the film occurs.

Abstract: A high load retention system for a sectional overhead door enables uninhibited operation of a standard roller track mechanism of a sectional overhead door, while allowing high wind loads to be seamlessly transferred from the track mechanism to a more robust high load jamb retaining element. The system comprises: a plurality of primary door panels, each having a front face; a primary track; engagement elements each having a first end connected to a primary door panel and a second end that rides in the primary track; a high load jamb retaining element positioned adjacent to the primary track and having a clasping portion; and a high load door retaining element connected to a primary door panel and having a clasping portion corresponding to the clasping portion of the high load jamb retaining element.

Abstract: A flexible seal may be attachable to a moveable barrier and usable to seal selectively along a horizontal surface adjacent the moveable barrier and along a vertical surface adjacent the moveable barrier. The flexible seal may assume a first orientation to be affixed to a lower edge of the movable barrier and may assume a second orientation to be affixed to an upper edge of the movable barrier.

Abstract: A glazing unit with a glass panel that is low in reflectance for RF radiation, a coating system that is high in reflectance for RF radiation disposed on the glass panel and creating onto the glazing unit a dual band bandpass filter. The glazing unit further features at least one frequencies selective decoated portion of the coating system extending along a plane, P, defined by a longitudinal axis, X, and a vertical axis, Z; having a width, DW, measured along the longitudinal axis, X, and a length, DL, measured along the vertical axis, Z. The frequencies selective decoated portion includes a first decoated element with a plurality of unit cells forming a regular grid, and a plurality of second decoated elements wherein a second decoated element is placed in each unit cell of the first decoated element and no second decoated element is in contact with the first decoated element.

Abstract: Systems and methods for configuring a user device to remotely control a plurality of architectural structural coverings are described. A user device receives a plurality of broadcast signals from a plurality of architectural structural coverings. Each individual broadcast signal is associated with an individual architectural structural covering and relays position information for the individual architectural structural covering. Each broadcast signal is also associated with an individual entry in a list of entries displayed on a user interface of the user device. Each entry comprises a representation of an architectural structural covering having a displayed position that matches position information from the broadcast signal and a position control for controlling a physical position of the associated architectural structural covering. When a user adjusts the position via the position control, an adjusted position instruction is sent to the associated architectural structural covering.

Abstract: A method for heating a door guide area includes: channeling a flow of heated air in a longitudinal first direction in a first conduit; channeling the flow of heated air in a longitudinal second direction different than the first direction in a second conduit; providing heated air to the second and first conduits by routing the heated air directly from a heater laterally across the first conduit to the second conduit; transferring heat from the flow of heated air in the second conduit to a heated space outside of the first and second conduits; and configuring a side portion of a roll-up door to be in the heated space when the roll-up door is in a closed position.

Abstract: A drill comprising a drill bit comprising a first drill part and a second drill part configured to slide relative to each other, wherein the first and second drill parts are pivotally coupled at one end to a first member and a second member respectively; a cam engaged with the first member and the second member, wherein the first and second members act as followers to slide the parts of the drill bit in a reciprocating motion with respect to each other, between a retracted and an extended position; and a wedge comprising a first angled surface engaged with the first member and a second angled surface engaged with the second member, the wedge configured to urge the drill bit to pivot in a first direction when the first member is moved towards the retracted position and to pivot in a second direction when the second member is moved towards the retracted position.

Abstract: A well tool for generating a notch in an open-hole wellbore, includes a tool body having a housing defining at least one slot and an interior volume. The tool body includes a cutting device disposed in the interior volume, configured to form a notch in a formation. The cutting device includes a shaft disposed in the interior volume of the housing having a first portion with a first exterior threads that extend around the first portion in a first direction, and a second portion having second exterior threads that extend around the second portion in a second direction opposite the first direction. The cutting device includes multiple blades configured to extend radially outward toward the formation through the slot or inward away from the formation and having a first blade extending from the first portion of the shaft and a second blade extending from a second portion of the shaft.

Abstract: Provided is a whipstock and well system. The whipstock, in one aspect, includes a coupling section having a first radius of curvature, the coupling section configured to engage with a mill bit when running in hole. The whipstock, in accordance with this aspect, further includes a casing breakthrough section having a second radius of curvature, and a controlled exit section having a third radius of curvature, wherein the second radius of curvature is less than the third radius of curvature.

Abstract: A hole opener configured for use with a power unit to open a hole. The hole opener comprises a gearbox including a hydraulic inlet fluidly coupled to the power unit and an exciter fluidly coupled to the hydraulic inlet, the exciter being coupled to a gear train including an imbalanced mass which is configured to generate vibrations upon receipt of pressurized hydraulic fluid from the hydraulic inlet. The hole opener further comprises a connector coupled to the gearbox for receiving the vibrations, the connector defining a void, and a hammer slidably coupled to the connector within the void, the hammer configured to receive the vibrations from the connector and to transmit the vibrations to the hole.

Abstract: Downhole tools with fixed cutters for engaging subterranean formations, removing rock, and drilling wellbores may include drill bits (e.g., polycrystalline-diamond compact bits) adapted to smooth torque and to minimize vibration during operation. The drill bits may have alternately arranged or designed blades. In some cases, one or more blades of the drill bit may have a wave-shaped blade. In some cases, the drill bit may have multiple blades with patterns that differ from each other in shape or orientation.

Abstract: Methods for attaching cutting elements to an earth-boring bit rely on keying the cutting elements inside cavities formed in the earth-boring bit. The attachment methods may involve specific shapes of the cutting elements and the cavities in which the cutting elements are received, and/or mechanical retainers. Preferably, the blade of the earth-boring bit is thicker around the opening in the edge of the blade than when the cavity is shaped for receiving a cutting element that has a circular cross-section.

Abstract: A technique facilitates assembly of well equipment at a wellsite. To help lift certain types of well tools, a mounting frame may be releasably coupled to a well string, e.g. a coiled tubing string. A cable guide and a cable attachment member may be releasably coupled to a well tool which is to be moved into engagement with the well string. A cable may be routed from the cable attachment member, through the cable guide, to a cable mounting feature of the mounting frame, and to a winch. The winch is operable to draw in the cable so as to move the well tool into alignment with and up into engagement with a connector of the well string.

Abstract: A high-temperature and high-pressure simulator for a deep in-situ environment is provided. The simulator includes a high-fidelity sample chamber, where a lower end of the high-fidelity sample chamber is provided with a bottom cylinder. A lower end of the bottom cylinder is provided on a base. A piston rod of the bottom cylinder extends into the high-fidelity sample chamber, and an upper end of the piston rod is provided with a rock sample seat. An upper end of the high-fidelity sample chamber is provided with a rock sample cap. The top of the high-fidelity sample chamber is sealed by an end cap of the high-fidelity sample chamber. An upper end of the end cap of the high-fidelity sample chamber is provided with a multi-section coring drill chamber. The uppermost section of the coring drill chamber is connected to a lift cylinder.

Abstract: A loss prevention screen includes a housing and a first plurality of rods, each rod having an uphole end and a downhole end. The plurality of rods is arranged within the housing to form a flow path that forces a fluid flowing through the housing to pass through gaps formed between the plurality of rods. A loss prevention tool includes a housing having a through bore and first and second loss prevention screens positioned within the housing.

Abstract: A system can be used for generating a pressure signal in a flow path defined by a tubular. The system can include a pressure source, a valve, and a controller. The controller can output a command to control the pressure source for outputting a fluid hammer, according to the command, through the valve and into a flow path defined by a wellbore tubular. The system can be positioned external to the flow path. The system can determine, based on the reflection signal, a presence of a deposition, a blockage, or a leak within the flowline while the flowline is in operation.

Abstract: Provided is an anchoring mechanism, a method for anchoring a downhole tool, and a well system. The anchoring mechanism, in one aspect, includes a tubular housing, a hub disposed about to the tubular housing, and a wedge hub disposed about the tubular housing, wherein at least one of the hub or wedge hub is slidably disposed about the tubular housing. The anchoring mechanism, according to this aspect, further includes one or more telescoping arms and one or more fixed toggle arms, wherein a first end of the one or more telescoping arms is coupled to one of the hub or the wedge hub, a first end of the one or more fixed toggle arms is coupled to an other of the wedge hub or the hub, and a second end of the one or more telescoping arms and a second end of the one or more fixed toggle arms are coupled to one another at a location between the first end of the one or more telescoping arms and the first end of the fixed toggle arms.

Abstract: A milling tool for use in a cased wellbore. The milling tool has a housing having a plurality of pockets formed therein. A blade is installed within each pocket and is movable between open and closed positions. The blade projects from the pocket when in an open position. Rotation of the housing causes the blades to move to an open position. The blades remain in a closed position when the housing is not rotating.

Abstract: An annular cutter catching device includes a housing having an inner bore therethrough, a cutter configured to cut a coupon, and a coupon catching device configured to grip an outer surface of the coupon. In an embodiment, an annular cutter catching device includes one or more split rings disposed within the inner bore of the housing. In the embodiment, at least one split ring is configured to grip an outer surface of the coupon within the inner bore of the housing. In an embodiment, an annular cutter catching device includes a coupon catcher disposed within the inner bore of the housing. In an embodiment, the coupon catcher includes a set of fingers movable between an open position and a closed position. In an embodiment, the set of fingers are configured to retain the coupon within the inner bore of the housing in the closed position.

Abstract: A method for operating an apparatus for installing a tubing hanger in a subsea wellhead or X-mas tree without hydraulic cables from the surface and without valves for controlling hydraulic functions. The method includes: providing an apparatus for installing the tubing hanger; preparing the apparatus for installation; actuating the tubing hanger's locking function via pressurized completion fluid that causes direct actuation of ring pistons that are arranged to operate the locking sleeve and the locking segments of the tubing hanger; verifying the tubing hanger is locked; and releasing the apparatus mechanically or hydraulically from the installed tubing hanger.

Abstract: A modular valve tree may have two or more blocks. Additionally, a first block may have a flow passage therethrougt, with an inlet and an outlet and a second block may have a flow passage therethrough with including an inlet and an outlet. Further, an insert may be provided comprising sealing elements. The insert may be partially disposed within each of the first block and the second block and the insert has a throughbore fluidly connecting the first block outlet to the second block inlet. Furthermore, the sealing elements are configured to seal external surfaces of the insert against an internal surface of the respective flow passages. A retention system may retain the blocks in position and compress and engage one or more of the sealing elements.

Abstract: A subsea tree including a fluid swivel, the fluid swivel comprising: (a) a fixed inner body defining an inlet for fluid communication with a production conduit fora subsea well; (b) a rotatable outer body defining an outlet and an attachment point for fluid communication with a riser; (c) a first interface between the fixed inner body and the rotatable outer body defining a fluid chamber in fluid communication with the inlet and the outlet; and (d) a first seal between the fixed inner body and the rotatable outer body; wherein, when the fluid swivel is attached to the riser, the riser is capable of rotational movement around the subsea tree.

Abstract: A wellhead adaptor for fluidly connecting to a well tubing system, the wellhead adaptor including an outer body having a bore; and an inner body located inside the bore and having an annulus A. The inner body and the outer body define an annulus B, which is concentric to annulus A.

Abstract: A wellbore intervention system for repairing a wall failure within a wellbore includes a fluid conduit installed to an outer surface of a casing string within the wellbore. The fluid conduit includes a tube to which a remedial substance is delivered, multiple ports arranged along a length of the tube for communicating the remedial substance to the wall failure in a cement region along the wellbore, and a one-way valve for preventing a reservoir fluid at the wall failure from flowing in an uphole direction through the tube.

Abstract: A tool and method for selectively allowing a transmission of torque to a casing string at a position below installation of the tool along the casing string. The tool includes an upper body to engage with an upper portion of a casing string, a lower body to engage with a lower portion of a casing string, and a swivel assembly connecting the upper body to the lower body, the swivel assembly is to operate in multiple configurations such that the upper body and the lower body are selectively locked together to allow or prevent torque transmission through the tool from the upper portion of the casing string to the lower portion of the casing string.

Abstract: A well completion including an electric safety valve and a female inductive coupler is provided. A corresponding male inductive coupler is aligned with the female inductive coupler to provide for the transfer of power and/or telemetry during deployment. The male inductive coupler can be removed for normal operation. In the event of safety valve failure during operation, a service male inductive coupler and contingency safety valve can be deployed such that the service male inductive coupler is aligned with the female inductive coupler.

Abstract: A method for evaluating and optimizing scale management at a subsurface for improved well performance may include performing multiple first tests, where each first test combines a first fluid with a second fluid, wherein the first fluid comprises a concentration of a scale inhibitor and a chemistry of additional fluid components. The method may also include identifying an optimal mixture of the first fluid among the first tests, where the optimal mixture comprises a minimum concentration of the scale inhibitor that reduces scale deposition. The method may further include performing a second test that combines the first fluid with the scale inhibitor, the second fluid, and rock. The method may also include evaluating a concentration of the scale inhibitor in aqueous phase after a period of time after initiating the second test. The method may further include identifying a target fluid for use in a field operation at the subsurface.

Abstract: A downhole cutting tool (13) for perforating a tubular (14) in an oil or gas well comprises a body (4); radially moveable cutting members (3) mounted on the body (4); a helical profiled member (1) rotatable relative to the body (4); and activation members (2) axially movable relative to the body (4). Rotation of the helical profiled member (1) generates axial movement of the activation members (2), and the activation members (2) configured to actuate the cutting members (3) from a retracted configuration to an extended configuration.

Abstract: A perforating gun for use in oil and gas operations. The gun is carried to a desired area of a wellbore using only fluid pressure. The gun comprises a charge housing disposed within a removable sleeve. The charge housing comprises a plurality of shaped charges in communication with one or more sensors. The sensors are programmed to initiate the detonation sequence of the shaped charges upon measuring set parameters. Upon detonation, the gun fragments into a plurality of pieces that may be washed away from the detonation site.

Abstract: An electrically operated catcher mechanism that is part of a lubricator and catcher unit used in conjunction with a bypass plunger in an oil or gas well include an electrically operated mechanism to move between the catch and release positions. The electrically operated catcher mechanism includes a cam rotated by a motor which causes the device to move between catch and release positions.

Abstract: Methods for providing wellbores for electromagnetic heating of a hydrocarbon formation positioned below a ground surface and apparatus thereof are provided. The apparatus includes two or more wellbore casings positioned within two or more wellbores. The two or more wellbores extend from a proximal end at the ground surface to a distal end at the underground hydrocarbon formation. Each of the two or more wellbore casings have a proximal portion and a distal portion. The two or more wellbores are in proximity to one another at a junction. The apparatus also includes a first electrical connection between the proximal portions of the two or more wellbore casings for grounding the two or more wellbore casings and a second electrical connection between the distal portions of the two or more wellbore casings. The second electrical connection is located at the junction and provides a short circuit that reduces current traveling on the two or more wellbore casings to the ground surface.

Abstract: A method of controlling a permeability zone in a reservoir includes introducing a diverter agent comprising a morpholinium based zwitterionic surfactant including a sulfonate terminal moiety, an ammonium-based zwitterionic surfactant, and an activator in a wellbore. Once introduced, the diverter agent contacts a high permeability zone in the reservoir. The diverter agent heats and gels to form a gelled diverter agent in the high permeability zone, subsequently forming a zone of decreased permeability.

Abstract: A fracture tool and a system includes a housing having a port, a sleeve disposed adjacent the housing and movable relative to the housing between a first position where the sleeve blocks the port and a second position where the sleeve unblocks the port, and a biaser operably connected between the housing and the sleeve. The biaser biases the sleeve to the first position. A method for fracturing a formation and producing a fluid includes opening a fracture sleeve, shifting a pressure-operated valve from an unarmed position to an armed position based upon the opening of the fracture sleeve. The method further includes applying fracture pressure to the formation, allowing the fracture sleeve to automatically close, actuating the valve with applied pressure, and flowing fluid through the valve. A borehole system including a borehole in a subsurface formation, and a fracture and production system disposed in the borehole.

Abstract: A wellsite system for electrically-driven fracturing may include a power supply system, one or more electrically-driven fracturing systems, one or more electrically-driven sand blenders, a sand supply system, a liquid supply system, and one or more manifolds. The power supply system includes a gas turbine generator set configured to provide power to the one or more electrically-driven fracturing systems and the one or more electrically-driven sand blenders respectively. The sand supply system and the liquid supply system are both connected to input ends of the electrically-driven sand blenders. Output ends of the electrically-driven sand blenders are connected to the electrically-driven fracturing systems through the one or more manifolds. The electrically-driven fracturing systems are connected to a wellhead through the one or more manifolds.

Abstract: A blender power unit (BPU) for use in fracturing jobs. The BPU comprises a transformer having an input and an output and configured to receive electrical power via the input at a first voltage to output electrical power via the output at a second voltage; a motor power bus coupled to the output of the transformer; a motor starter bus; at least one motor soft starter having an input coupled to the motor power bus and having an coupled to the motor starter bus; a plurality of electric power relays coupled to the motor power bus and configured to supply electric power from the motor power bus to a load when in a closed state; and a plurality of start electric power relays coupled to the motor starter bus and configured to supply electric power from the motor starter bus to a load when in a closed state.

Abstract: A technique facilitates mixing of fluids for use in well treatment operations. According to an embodiment, a dry powder material, e.g. a friction reducer, may be thoroughly mixed into fluid or fluids associated with a well treatment operation. The powder material is combined with liquid, e.g. water, via a series of Venturi mixers arranged to thoroughly mix the materials. In some applications, the Venturi mixers are mounted on a modular unit which is readily moved to a desired wellsite. Additional modular units may be added to increase the amount of product being mixed according to the demands of a given well treatment operation, e.g. a hydraulic fracturing operation.

Abstract: A method, apparatus, and system according to which a discharge manifold is pressurized by at least a first fracturing pump, said discharge manifold being adapted to communicate pressurized fluid to an oil and gas wellbore.

Abstract: A method for drilling a well includes generating a plurality of proposed drilling actions using a plurality of working agents based on a working environment, simulating drilling responses to the proposed drilling actions using a plurality of validation agents in a validation environment that initially represents the working environment, determining rewards for the proposed drilling actions based on the simulating, using the validation agents, selecting one of the proposed drilling actions, and causing a drilling rig to execute the selected one of the proposed actions.