Abstract: In one embodiment, a release mechanism for a latch is provided. The release mechanism having: a first release lever, the first release lever having a first lever and a second lever; a second release lever operatively coupled to the first release lever; and a spring operatively coupled to the first lever and the second lever such that a biasing force of the spring must be overcome in order to effectuate movement of the second release lever via the first release lever.

Abstract: A latch for a cabinet is described. The latch may be used to secure a door of the cabinet in a closed position. The latch includes a pawl member that pivots or rotates relative to a pivot plate. The pawl member includes a pawl tip generally opposite of a pawl fulcrum end. The latch includes a striker. The pawl member engages and disengages with the striker. The latch includes a handle that is configured to move. The handle includes an upper end. The upper end is configured to contact the pawl lever end to cause the pawl member to pivot or rotate relative to the pivot plate to disengage the pawl member from the striker.

Abstract: A hinge module assembled to a first body and a second body of an electronic device and including a first rotating shaft assembled to the first body and having a first limiting portion, a second rotating shaft movably and rotatably assembled to the second body, a linking member, a switching member, and a transmission couple is provided. The second rotating shaft is fixed to the linking member and has a second limiting portion. The first rotating shaft is rotatably assembled to the linking member. The switching member movably passes through the linking member. The first limiting portion and the second limiting portion are located at two opposite ends of a moving path of the switching member to be interfered therewith. The transmission couple is respectively disposed at the second rotating shaft and the second body.

Abstract: A rotary hinge assembly includes a fluid chamber filled with a fluid and a constricted section with a throat area which is tunable by a throat tuner to control the fluid flow passing through the constricted section. Within the fluid chamber, a rotary connecting pin is mounted so that a first longitudinal end of the pin is connected to a door, and a second longitudinal end of the pin is concentrically and rotatably mounted within the fluid chamber. On the second longitudinal end, a vane is connected and adapted to rotate for displacing the fluid present in the fluid chamber towards the constricted section, when the rotary connecting pin undergoes the rotational movement in response to opening and closing of the door.

Abstract: An electronic device and a hinge assembly thereof are provided. The hinge assembly has a first fixing block, a second fixing block, a first linking rod and a second linking rod. The first fixing block has a first end and a second end. The second fixing block has a third end and a fourth end. The first linking rod has a fifth end slidably and rotatably connected to the second end and a sixth end rotatably connected to the fourth end. The second linking rod has a seventh end slidably and rotatably connected to the fourth end and an eighth end rotatably connected to the second end. The sixth end has a groove portion and a first inclined surface, and the eighth end has a second inclined surface contacting the first inclined surface.

Abstract: An electromechanical door supporting system for temporarily maintaining a door in an open position having: a) a housing with an electric motor in communication with a power source; b) a base plate sized to pass underneath a swinging door; c) the base plate extending away from the housing; d) the electric motor causing rotational movement in a rod extending from inside the housing, to outside the housing and over a surface of the base plate; e) a door supporting element extending perpendicular to the extended rod; and f) the door supporting element being attached to the extended rod at a proximal location and extending over the surface of the base plate to a distal end so that rotation of the extended rod causes the distal end of the door supporting element to elevate above the base plate to secure an opened door.

Abstract: An architectural covering may include an adjustment member configured and positioned to adjust friction affecting movement of the covering. The adjustment member may be manipulated to increase friction in the architectural covering so a covering member (e.g., a panel) of the architectural covering does not move as freely as it would without the increased friction, yet the covering member nonetheless remains simple to operate. The additional friction may be effective to inhibit the covering member from moving across an associated architectural feature on its own without a user's input.

Abstract: Hinge device with long reciprocating stroke of a front panel (P) and having a first member (3) assigned to be fixed to an appliance (A) and a second member (5) assigned to be fixed to a door (D) of the appliance; the second member is pivoted to the first member by means of a hinge pin (7). A connection means (9) is assigned to be fixed to the front panel for actuating the translation thereof along the door during the rotation of the latter between its extreme closing (C) and opening (O) conditions. The hinge device includes kinematic means (11) having one end movable in the first member and an opposite end provided with a ring gear (13) centrally and rotatably pivoted to the second member or to an element fixed thereto, by means of a respective first pivot pin (15).

Abstract: A smart opening system is provided. The smart opening system includes a vehicle defining an aperture, a door coupled to the vehicle to assume a first position at which the aperture is closed and multiple second positions at which the aperture is open and to move between the first and second positions, a sensor disposed to sense obstructions surrounding the vehicle and a processing element coupled to the sensor and configured to determine whether any of the obstructions are within a range of motion of the door.

Abstract: A pinch sensor that is provided with: a capacitive sensor electrode (18) that is provided to window glass; a shield electrode that covers a selected portion of the sensor electrode in a non-contact manner and that sets a limited detection directivity for the pinch sensor; and a dummy electrode that is arranged between the sensor electrode and the shield electrode and that is set to the same voltage as the sensor electrode or to a voltage that is in the vicinity thereof.

Abstract: An automatic auto-sensing flood protection roller shutter with auto-locating reinforced column includes a door plate composed of a plurality of door panels, at least one reinforced column automatically movable by a motor to a reinforcing position behind the door plate when the door plate is lowered upon sensing a flood, and a bolt and bolt driving device for securing the at least one reinforced column in the reinforcing position.

Abstract: Disclosed is a method for attaching a pane element to a sash, including the steps of A) providing a pane element with a border element, thereby making a pane module, and B) bringing a contact surface of the border element into contact with a contact surface of the sash, and connecting the pane module to the sash. Further disclosed a pane module comprising a pane element and a border element, where the border element includes a contact surface adapted for being connected to a contact surface of the sash, wherein the contact surface of the border element is adapted for being connected to the contact surface of the sash by means of an adhesive or glue, where the border element includes one or more elongate support member(s), and where the border element comprises guiding elements projecting from the contact surface of the border element substantially perpendicularly to the pane plane, wherein the guiding elements are adapted for being inserted in openings in the contact surface of the sash.

Abstract: The invention relates to a glass element (1) having at least a first panel (2), which is formed from glass, at least a second panel (3) and at least one intermediate layer (8), wherein the intermediate layer (8) is arranged between the first panel (2) and the second panel (3). The first panel (2) has a first side (4) and a second side (5), wherein the first side (4) is arranged on the intermediate layer (8). An adapter unit (15) is adhesively bonded to the first side (4) of the first panel (2) and has a spacer plate (9). The intermediate layer (8) extends from the first panel (2) to the second panel (3) with a first longitudinal extent (L1). The spacer plate (9) extends from the first panel (2) to the second panel (3) with a second longitudinal extent (L2). The first longitudinal extent (L1) is identical to the second longitudinal extent (L2).

Abstract: A high speed parallel manufacturing line for manufacturing insulated glass units, the manufacturing line including a front conveyor system, a back conveyor system, a shuttle mechanism that distributes glass lites to the front conveyor system and the back conveyor system, an insulated glass unit spacer applicator having a spacer dispensing head configured to apply perimeter spacer material to one of the glass lites, the spacer head being proportionally movable relative to the glass lite as the glass lite is conveyed on the front conveyor mechanism to apply the perimeter spacer material to create a spacer applied lite and a gas press. A secondary edge sealing unit has a first secondary edge sealing head and a second secondary edge sealing head, each of the first secondary edge sealing head and the second secondary edge sealing head applying edge sealant to portion of a perimeter of an insulated glass unit.

Abstract: Implementations of a stiffener joint are provided. In some implementations, the stiffener joint comprises a pair of interlocking beams having a mechanical locking mechanism requiring no welding. In some implementations, the pair of interlocking beams comprises a first beam comprising a plurality of tabs extending from the first beam and forming a hook and a second beam comprising a plurality of opening. The tabs of the first beam extend through the respective openings of the second beam and a portion of the second beam is positioned in the hook formed by the tab of the first beam thereby interlocking the beams. In some implementations, the stiffener joints may be used inside hollow doors.

Abstract: A barrier for the inside of a home. The barrier includes two partitions that slide relative to each other to increase and decrease a distance between ends of the barrier. The partitions slide into and out of confronting relationships with each other. The partitions engage each other at upper and lower locations and further at a medial location where an elongate member of one partition is received in a tube engaged to the other partition. A threaded piece upon being turned brings pressure to bear upon an end of the tube such that the partitions can be incrementally expanded apart and thereby pressurized between two locations within the home so as to block off one portion of the home. The threaded piece is slideable along the elongate member.

Abstract: A protection system for an opening of a building is provided. The system includes a pair of side rails where the pair of side rails each has a pair of offset elongated protrusions contained within a cavity of the side rails. Further, at least one slat extending between the pair of side rails, the slat adapted to connect with the pair of offset protrusions within the side rails. In most embodiments, a plurality of slats are provided to roll up when not in use.

Abstract: The present disclosure relates to a winding assembly and a retractable curtain, which may adjust the tensile force of a cord. The winding assembly of the retractable curtain comprises a fixing seat and a winding shaft rotatably disposed on the fixing seat, wherein a threading hole and guiding holes are opened in the fixing seat for the cord to pass through successively; there is a plurality of guiding holes opened in different positions of the fixing seat, and the threading hole is located between the outer wall of the winding shaft and the plurality of guiding holes. The outer wall of the winding shaft tilts outward gradually along the axis thereof, and the threading hole is opened on a part of the fixing seat corresponding to one end of the winding shaft with a larger outer diameter.

Abstract: We disclose a self-cleaning window blind which includes a thin layer of photocatalytic material on at least one surface of the slats. The window blind includes an ultraviolet light source which directs ultraviolet light onto the photocatalytic material. Consequently, the window blind is not dependent on available sunlight. The ultraviolet light source may be located in either the headrail or the bottom rail of the window blinds. Upon exposure to ultraviolet light, organic material on the slats which may include dust, grease, or microorganisms, may be converted to carbon dioxide and water. One or both of the horizontal edges of the slats may include a lip which may collect water formed by the photocatalytic reaction. In some embodiments, the slats are slightly convex. This shape may inhibit water from collecting in droplets on the slat and help direct the water towards the lip. Consequently, water spots are not created on the slats.

Abstract: A cord winding structure for cordless blind is assembled in a cordless blind. A cord winder includes an upper case and a lower case which are respectively arranged a plurality of columns and posts and combined with each other by bolts. At least one winding wheel for winding a bearing rope, a driving wheel, and a driven wheel arranged corresponding to the driving wheel are assembled to the columns. The driving wheel, the driven wheel, and the winding wheel are respectively formed a gear-like driving portion. The gear-like driving portions of the wheels are engaged with one another. The driving wheel has a gradient coil spring which has different curvatures to result in a front end with weaker elasticity and a rear end with stronger elasticity. The front end of the gradient coil spring is winded on the driven wheel to make the cordless blind correctly be operated.

Abstract: Window blinds with automated mechanisms that require a power source often include a battery housing that is placed at least partially outside of the headrail. This is done to make room for mechanical devices that are required to be housed within the headrail. We disclose a battery housing which may be mounted within a headrail of a window blind. Consequently, the battery housing is not visible when the headrail is mounted. This creates a more aesthetically pleasing window treatment. The disclosed battery housing may include a base mounted on two elongated battery compartments. An elongated channel may separate the two elongated battery compartments.

Abstract: In one aspect, a cord retention assembly for a covering for an architectural structure may include a cord guide coupled to a shade panel of the covering that is configured to receive a corresponding cord of the covering. The cord guide may form a closed shape and may also be configured to define an entryway around at least a portion of a perimeter of the closed shape. In addition, the cord retention assembly may include at least one retention member installed relative to the cord guide such that the retention member(s) prevents the entryway of the cord guide from being rotated past the attachment location defined between the shade panel and the cord guide.

Abstract: The present disclosure relates to a retractor for retracting a curtain cord and a retractable curtain, which avoids stacking or intertwining of the cord and has a compact structure. The retractor comprises a synchronizing wheel group and transmission assemblies, the transmission assembly at each side being connected with a winding assembly; each transmission assembly comprises a first bevel gear and a second bevel gear which are engaged with each other, and the first bevel gear is connected with at least one synchronizing wheel; each winding assembly comprises a fixing seat, a winding shaft and a transmission shaft, the transmission shaft is connected with a corresponding second bevel gear, the winding shaft passes though and is coaxial with the transmission shaft, the outer wall of the winding shaft tilts outward gradually along the axis of the transmission shaft.

Abstract: The present disclosure provides an adjusting device for a curtain cord and a retractable curtain. The adjusting device for a curtain cord comprises a mounting base for fixedly connecting to the lower end of the curtain body, the mounting base is provided with a first threading hole for the cord to pass through, the mounting base is provided with a mounting groove thereon, the first threading hole is provided on the groove wall of the mounting base, and the adjusting device further comprises a stopper for winding and fixing the cord, a winding hole is provided throughout in the middle of the stopper for the cord to pass through, the stopper is detachably jammed within the mounting groove, and a gap for accommodating the cord wound on the outer surface of the stopper is located between the groove wall of the mounting groove and the stopper.

Abstract: Various embodiments of ladders, ladder legs, ladder feet, foot mechanisms for ladders, and related methods are provided herein. In one embodiment, a foot is pivotal relative to a leg or rail of the ladder between a first position and at least a second position. A biasing force is applied to the foot to maintain the foot in either of the user-selected positions until a force is applied to pivot the foot to another position. In one embodiment, the foot mechanism maintaining the foot at a desired position may include a pair of pins that couple the foot to another component (e.g., a housing member, an insert member or a rail of the ladder). At least one of the two pins may be displaceable relative to the other pin during pivoting of the foot.

Abstract: A stabiliser accessory releasably securable to a ladder having two one piece stiles and at least three rungs extending between the stiles, characterised by an elongate housing to be secured in use to the lower end of the stiles of the ladder and two stabilising arms retractably received within the housing and extendable laterally in opposite directions, when deployed, to contact the ground at points that are further spaced apart than the ends of the housing, wherein the stabilising arms are spring biased in a direction to protrude from the housing and are retained within the housing, and a catch mechanism is provided on the housing to retain the stabiliser arms in the retracted position.

Abstract: The invention relates to a ground processing tool and a method for creating a borehole in the ground, wherein ground material is removed by the ground processing tool and blended with a fluid in the created borehole to form a suspension, which is suctioned away via at least one opening in the at least one mixing blade and via the conducting channel in the central shaft.

Abstract: A bearing assembly for use in a bottom hole assembly includes a reactive portion and a fluid restrictor portion, the portions being operatively coupled by a mandrel of the bottom hole assembly. The fluid restrictor portion comprises a piston valve component disposed in a stationary valve component, the piston valve component and stationary valve component arranged to generate fluid pressure variations, the fluid pressure variations causing axial movement of the piston valve component. The reactive portion comprises an oscillation assembly mounted between a housing and the mandrel, the oscillation assembly responsive to movement of the mandrel in the housing applying force to the oscillation assembly. The mandrel of the bottom hole assembly is directly mounted to the piston valve component.

Abstract: A downhole assembly and method are provided for selective activation of a motor in a drilling string. The downhole assembly includes a stator and a rotor assembly. The rotor assembly comprises a rotor body having a fluid passage extending between an inlet and an outlet, the fluid passage extending through at least part of the length of the rotor; and a ball catch component comprising a receiving end and an interior seat for receiving and retaining a blocking implement, and a fluid passage. When no blocking implement is retained in the rotor assembly, the fluid passage permits flow of drilling fluid entering the receiving end to the fluid passage of the rotor body. The fluid thereby bypasses the motor, which is not activated. When a blocking implement is in place, drilling fluid flows around the ball catch component and into the motor to thereby activate the motor.

Abstract: Provided are systems and methods for drilling a horizontally-oriented well having a sigmoid-shaped wellbore including an upper sigmoid portion having a downward curving wellbore trajectory and a lower sigmoid portion having an upward curving wellbore trajectory. The upper sigmoid portion having a first trajectory having a generally horizontal gradient at an entry point of the wellbore and that increases in downward gradient to a vertical gradient at an inflection point. The lower sigmoid portion having a second trajectory that includes the vertical gradient at the inflection point and that decreases in downward gradient to a generally horizontal gradient at a horizontal transition point of the wellbore.

Abstract: A subterranean support-bolt drill bit has a bit body rotatable about a central axis, the bit body having a forward end and a rearward end axially spaced away from the forward end. The support-bolt drill bit includes at least one bit cutting element coupled to the bit body, the at least one bit cutting element including a cutting edge. The support-bolt drill bit also includes a central pilot projecting from the bit body beyond the at least one bit cutting element in an axially forward direction, the central pilot including a pilot cutting edge.

Abstract: A drilling tool includes a pilot bit coupled to an eccentric reamer that has a reaming side and a stabilizing side. A fluid passageway extends between the reamer and the pilot bit, and the tool includes at least one upwardly-directed nozzle in fluid communication with the fluid passageway and positioned on the stabilizing side of the reamer. The reamer may include a plurality of angularly spaced blades on the reaming side that radially extend a first distance, the reamer blades being disposed within a first arcuate segment defined by the two most distant reamer blades. One or more stabilizing blades extend a second distance that is less than the first distance, the stabilization blades being disposed within a second arcuate segment defined by the two most distant reamer blades and that has the angular measure equal to 360 degrees minus the first arcuate segment.

Abstract: A cutting table comprises a polycrystalline hard material and at least one rhenium-containing structure within the polycrystalline hard material and comprising greater than or equal to about 10 weight percent rhenium. A cutting element, an earth-boring tool, and method of forming a cutting element are also described.

Abstract: A metal matrix composite (MMC) may be formed with two or more portions each having different reinforcing particles that enhance strength, wear resistance, or both of their respective portions of the MMC. Selective placement of the different reinforcing particles may be achieved using magnetic members. For example, in some instances, forming an MMC may involve placing reinforcement materials within an infiltration chamber of a mold assembly, the reinforcement materials comprising magnetic reinforcing particles and non-magnetic reinforcing particles; positioning one or more magnetic members relative to the mold assembly to selectively locate the magnetic reinforcing particles within the infiltration chamber with respect to the non-magnetic reinforcing particles; and infiltrating the reinforcement materials with a binder material to form a hard composite.

Abstract: A drill bit for drilling a borehole in earth formations may include a bit body having a bit axis and a bit face; a plurality of blades extending radially along the bit face; and a plurality of cutting elements disposed on the plurality of blades, the plurality of cutting elements comprising: at least one cutter comprising a substrate and a diamond table having a substantially planar cutting face; and at least two non-planar cutting elements comprising a substrate and a diamond layer having a non-planar cutting end, wherein in a rotated view of the plurality of cutting elements into a single plane, the at least one cutter is located a radial position from the bit axis that is intermediate the radial positions of the at least two non-planar cutting elements.

Abstract: In accordance with embodiments of the present disclosure, a system includes a first tubular member having a first knurl surface and a second tubular member having a recessed slot located in the inner circumference of the second tubular member and a threaded hole from the external circumference of the second tubular member into the recessed slot. The system may further include an insert located within the recessed slot, the insert comprising a second knurl surface facing radially inward from the second tubular member and a set screw within the threaded hole of the second tubular member, the set screw having an unthreaded end mechanically coupled to the insert. The set screw rotatable to drive the second knurl surface of the insert into the first knurl surface of the first tubular member.

Abstract: In one embodiment, an anti-rotation system includes a first tubular member having an extended thread and a torque shoulder, the first tubular member comprising a radial recessed area, the radial recessed area located axially between the external thread and the torque shoulder of the first tubular member. The system may further include a second tubular member comprising a radial recessed slot, the radial recessed slot located in the inner circumference of the second tubular member. The system may also include a pin toothed insert mechanically coupled to the first tubular member within the recessed area, the pin toothed insert comprising a first circumferential tooth pattern facing radially outward from the first tubular member. The system may also include a spring loaded, radial ratchet dog located within the radial recessed slot, the spring loaded radial ratchet dog comprising a second circumferential tooth pattern facing radially inward from the second tubular member.

Abstract: A shock mitigation device (100) comprising: a first end (130), a second end (140), and an inner tubular (150), wherein the inner tubular defines an internal cavity (110). In certain embodiments the present disclosure relates to shock mitigation devices connected to a riser for use with emergency separation tools using explosive charges to sever a workstring at a location above a blowout preventer stack in a well.

Abstract: A cable guide for supporting a slack portion of a drill line during a slip and cut operation features a top body portion and a bottom body portion held together in spaced relation to one another such that inner ends of the top and bottom body portions are facing but spaced from one another. At least one contact surface is carried on each body portion, and a pair of the contact surfaces are aligned in a working position so as to collectively define a pathway between the inner ends of the top and bottom body portions along which the slack portion of the drill line is to be routed. The cable guide also features an adjustable coupling mechanism arranged for displacing the inner ends of the top and bottom body portions towards and away from one another so as to adjust a size of the pathway.

Abstract: A drilling fluid system and associated method for supplying drilling mud to a drilling operation includes a plurality of first sensors associated with a first mud pit, configured to measure a plurality of properties of the drilling mud in the first mud pit, a plurality of second sensors associated with a second mud pit, configured to measure the plurality of properties of the drilling mud in the second mud pit, and a control unit configured to receive measurements from the plurality of first sensors and the plurality of second sensors, determine which of the mud pits comprises drilling mud with a desired plurality of properties, and cause to operate a first valve associated with the first mud pit or a second valve associated with the second mud pit for selecting drilling mud from the first mud pit or the second mud pit based on the determination.

Abstract: An apparatus (10) for capturing drilling fluid returns in an exploration drilling process, as well as a related method of capturing the drilling fluid returns. The apparatus (10) is adapted to be fitted onto a drill collar/casing (11) adjacent its open top (13). The apparatus (10) comprises a body (21) defining a reservoir (23) for receiving the drilling fluid returns flowing out through the open top end (13) of the drill collar/casing (11) and spilling into the reservoir (23). The reservoir (23) comprises a collecting portion (25) in which the fluid returns spilling from the drill collar/casing (11) can be collected. The reservoir (23) also comprises a sump portion (27) which can receive the drilling fluid returns and from which the drilling fluid returns can be pumped by way of a sump pump (28). The reservoir (23) is configured to direct the drilling fluid returns collected by the collecting portion (25) to the sump portion (27) as a continuous flow.

Abstract: A pressure activated cyclical valve assembly includes a first sub, a second sub, a piston, and a biasing member. The first sub has a first passageway therethrough. The second sub is coupled to the first sub and has a second passageway therethrough. The piston is positioned within the second passageway and is shiftable between a deactivated position in which a bypass port is closed and an activated position in which the bypass port is open. The piston has a piston orifice and the first passageway is in fluid communication with the second passageway through the piston orifice. The biasing member exerts a force against the piston to maintain the piston in the deactivated position. The piston orifice is sized to restrict the flow of fluid therethrough such that the piston can be shifted between the deactivated and activated positions by changing flowrate of fluid in the first passageway.

Abstract: A system and method for positioning a tool within a tubular segment or a tubular tool, wherein the interior surface of the tubular segment or tubular tool is provided with one or more pluralities of grooves, each defining a selected profile. A downhole tool is lowered into the tubular segment or tubular tool, having a blade in communication therewith. The blade includes a plurality of protruding members thereon, which define a profile complementary to one of the selected profiles formed by one of the pluralities of grooves. A biasing member biases the blade toward the interior surface of the tubular segment or tubular tool to engage the protruding members of the blade within the complementary profile of the tubular segment or the tubular tool. The system and method further include a slip and wedge assembly usable to position a tubular segment or tubular tool within a tubular member or wellbore.

Abstract: A bottom hole assembly having a packing element, a lower cone disposed below the packing element, and a lower slip disposed below the packing element. The bottom hole assembly also includes a setting tool removably attached to the plug, the setting tool having a mandrel and a setting sleeve connected to the mandrel. Also, a method for sealing a well including disposing a bottom hole assembly having a plug and a removable setting tool in a well. The method further includes applying pressure to a setting sleeve, contacting an inner diameter of the well with a lower slip, locking the lower slip against an inner diameter of the well, shearing a shear mechanism, disconnecting the removable setting tool from the well, dropping a ball into the well, contacting the ball with the packing element, and separating the well into at least two sections.

Abstract: A rotary tool for milling tubing in a borehole comprises at least one cutter with a cutter body and a cutting surface on the body. Each cutter is shaped and positioned on the tool so as to reduce tensile stress in the cutter, thereby reducing risk of the cutter becoming chipped or broken in use and produces swarf of reduced rigidity, less likely to form a blockage in the borehole.

Abstract: A downhole tool for use within a wellbore extending into an underground formation includes a wellbore wall disengaging assembly having a tubular string defining a longitudinal axis, and a plurality of longitudinal blades forming a retractable sleeve around the tubular string, the retractable sleeve having a substantially contiguous inner profile in a closed position, and wherein the retractable sleeve is actuated based on an internal pressure in the tubular string proximate to the downhole tool. A method of disengaging a downhole tool from a wall of a wellbore extending into an underground formation includes lowering a wellbore wall disengaging assembly, the assembly comprising a tubular string defining a longitudinal axis, and a plurality of longitudinal blades forming a retractable sleeve around the tubular string, the retractable sleeve having a substantially contiguous inner profile in a closed position, and actuating the retractable sleeve.

Abstract: A safety node for a hydrocarbon extraction facility control system, the node comprising: a hydraulic input; a hydraulic output; a directional control valve disposed between the hydraulic input and the hydraulic output; and a functional safety electronics module containing a logic solver in operable communication with the directional control valve; wherein the logic solver is configured to operate the directional control valve to permit hydraulic communication between the hydraulic input and the hydraulic output in response to the presence of a given condition and inhibit hydraulic communication between the hydraulic input and the hydraulic output in response to the absence of a given condition.

Abstract: A downhole assembly comprises a first article; and a second article having a surface which accommodates a surface shape of the first article, wherein the first article is configured to provide a chemical, heat, or a combination thereof to facilitate the disintegration of the second article. A method comprises disposing a second article in a downhole environment; disposing a first article on the second article; the second article having a surface which accommodates a surface shape of the first article; performing a downhole operation; and disintegrating the first article to provide a chemical, heat, or a combination thereof that facilitates the disintegration of the second article.

Abstract: An improved plug for sealing a tubular as described. The improved plug comprises a plug body, the plug body comprising a propellant and an initiator adapted to initiate the propellant upon a signal. Upon initiation the propellant deflagrates causing the plug body to at least partially disintegrate.

Abstract: A layer of permeable material is positioned on an area of lost circulation lithology in a wellbore. An example of the permeable material includes a planar member with perforations that is rolled into and retained in an annular configuration. The permeable material is lowered into the wellbore adjacent the area of lost circulation and allowed to unroll and expand radially outward against walls of the wellbore. The wellbore wall along the area of lost circulation lithology can be reamed out so the layer of permeable material is out of the way of a drill bit. Applying a bridging agent on the interface where the permeable material contacts the wellbore wall forms a flow barrier.