Abstract: A heat sink includes a base panel having parallel channels located on the top wall, first ribs protruding from the top wall and respectively extending along one side of each channel and second ribs protruding from the top wall and respectively extending along the other side of each channel, and radiation fins respectively mounted in the channels of the base panel and supported on the second ribs in vertical positions, each radiation fin having an angled foot portion, which is inserted into one channel and secured thereto by the associated first rib upon deformation of the associated first rib by an external force.

Abstract: A heat-transfer mechanism which transfers heat of a heat-generating component mounted on a board to a housing includes a heat-transfer plate having a bottom face portion which has contact with the heat-generating component, a first heat-transfer portion which is screwed near one end portion of the housing and a second heat-transfer portion which is screwed near the other end portion of the housing.

Abstract: Providing a plurality of fans within an enclosure. A system implementing this technique can include an enclosure, a heat sink in thermal communication with the enclosure, electronic components at least partially sealed within the enclosure, an eXclusive OR (XOR) fan array, a monitoring engine, and a control engine. A method implementing this technique can include using a heat sink to dissipate heat generated by electronic components within an enclosure; determining that each of the fans of a XOR fan array are stopped, selecting one and only one of the fans of the XOR fan array for operation, and operating the fan to increase air flow within the enclosure, thereby increasing the efficiency of the heat sink.

Abstract: A heat exchanger includes a first regenerator core and a second regenerator core and a four-way valve coupled to a cold section of the first regenerator core and to a cold section of the second regenerator core. The four-way valve directs input air to the first regenerator core or to the second regenerator core. A high-temperature passive check valve is coupled to a hot section of the first regenerator core and to a hot section of the second regenerator core. The high-temperature passive check valve comprises an inlet header coupled to the hot section of the first regenerator core or the second regenerator core, a valve poppet coupled to a valve stem and a valve seat located on a surface parallel to a surface of the valve poppet. Air entering the inlet header moves the valve poppet away from the valve seat, creating an opening through which air passes.

Abstract: A heat exchanger for an internal combustion engine's cooling system, said heat exchanger comprising a main and an auxiliary circuit and comprising two separated regions, one large region communicating by means of a first radiator tank with the main cooling circuit and the other, small region communicating by means of a second radiator tank with the auxiliary cooling circuit, characterized in that the radiator tanks may communicate with each other through a connection aperture receiving a controlled closing element and in that a drive acting on said closing element is used to selectively open or close the said connection aperture.

Abstract: A method, system, and computer program product are provided for controlling liquid-cooled electronics, which includes measuring a first set point temperature, Ta, wherein the Ta is based on a dew point temperature, Tdp of a computer room. A second set point temperature, Tb, is measured, wherein the Tb is based on a facility chilled liquid inlet temperature, Tci, and a rack power, Prack, of an electronics rack. A Modular Cooling Unit (MCU) set point temperature, Tsp, is selected. The Tsp is the higher value of said Ta and said Tb. Responsive to the selected Tsp, a control valve is regulated. The control valve controls a flow of liquid that passes through a heat exchanger.

Abstract: A bottom hole assembly is run into the wellbore on slickline with a tractor to assist in movement of the bottom hole assembly through a deviation in either direction. The tractor can have retractable drive components and can be responsive to tension in the slickline to turn it on and to avoid overrunning the slickline if driving out.

Abstract: A downhole plug is provided. In one or more embodiments, the plug includes a body and an element system disposed about the body. The plug further includes a first and second back-up ring member having two or more tapered wedges. The tapered wedges are at least partially separated by two or more converging grooves. First and second cones are disposed adjacent the first and second back-up ring members.

Abstract: A swelling seal comprises a swellable material configured to swell upon exposure to an activator medium, and a de-emulsifying component configured to encourage separation of at least one constituent phase from an emulsion comprising an activator medium. Once separated, the activating medium may be used to activate the swellable material to swell and establish a seal.

Abstract: A wellbore system is disclosed, comprising a wellbore extending into an earth formation, the wellbore containing a body of fluid, and an expandable tubular element arranged in the wellbore, whereby a lower end portion of the wall of the tubular element is bent radially outward and in axially reverse direction so as to define an expanded tubular section extending around a remaining tubular section of the tubular element. The expanded tubular section is axially extendable by downward movement of the remaining tubular section relative to the expanded tubular section. The body of fluid is located in the remaining tubular section, and a fluid conduit extends from the body of fluid to a location above the remaining tubular section, the fluid conduit being movable in upward direction relative to the remaining tubular section.

Abstract: A technique enables improved efficiency with respect to various coiled tubing and well servicing operations. The technique utilizes a combined mobile unit having several types of equipment combined into at least one transportable unit. The combined mobile unit may comprise a coiled tubing reel having coiled tubing, a well servicing system mounted to deliver material through the coiled tubing, and/or other well servicing components with the gas delivery system. The gas delivery system has a pressurized liquid gas vessel to deliver gas that can be used for well servicing operations, including purging material from coiled tubing.

Abstract: A system for optimizing gravel deposition in a completion interval of a well. The system includes a pumping system that is operable to deliver a gravel pack slurry to the completion interval, an actuator system that is operable to control properties of the gravel pack slurry and a sensor system that is operable to monitor parameters representative of gravel deposition in the completion interval. A dynamic gravel pack model defined in a computer is operable to receive data from the sensor system and provides estimates of gravel deposition in the completion interval. A control system is operable to control the pumping system and the actuator system in relation to a gravel pack deposition plan and the dynamic gravel pack model, wherein the estimates of the dynamic gravel pack model are input into the control system to automatically modify the gravel pack deposition plan.

Abstract: In-situ formation fluid evaluation methods and apparatus configured to measure a first resonance frequency of a first fluid using a first densimeter downhole, wherein a first density of the first fluid is known; measure a second resonance frequency of a second fluid using a second densimeter downhole, wherein the second fluid is a formation fluid received by the second densimeter downhole, and wherein a second density of the second fluid is unknown; and determine the second density of the second fluid using the first and second resonance frequencies and the known first density.

Abstract: Nanoemulsions, miniemulsions, microemulsion systems with excess oil or water or both (Winsor III) or single phase microemulsions (Winsor IV) may be pre-formed and used as one or more fluid pills during hydrocarbon recovery operations after drilling with OBM or SBM. The nanoemulsions, miniemulsions, microemulsion systems with excess oil or water or both or single phase microemulsions remove oil and solids from the well and wellbore surfaces. In one non-limiting embodiment, a single phase microemulsion (SPME) or other pre-formed fluid may be created from a polar phase, a nonpolar phase, an optional viscosifier, and at least one surfactant.

Abstract: Systems and methods for bidirectional gravel packing of wells. A gravel packing method includes flowing a gravel slurry in one direction in an annulus formed between a wellbore and a gravel packing assembly, and flowing another gravel slurry in an opposite direction in the annulus. A well system includes a gravel packing assembly positioned in a wellbore; one or more well screens interconnected in the gravel packing assembly; a flow control device, interconnected in the gravel packing assembly, and which selectively permits and prevents flow of a gravel slurry outward from the gravel packing assembly to an exterior of the well screens; another flow control device, interconnected in the gravel packing assembly, and which selectively permits and prevents flow of another gravel slurry outward from the gravel packing assembly to the exterior of the well screens; and the well screens being positioned between the flow control devices.

Abstract: Compositions comprising a proppant core having an outer surface and polymeric microspheres attached to at least a portion of the outer surface are described. The compositions are useful, for example, to increase the productivity of a hydrocarbon oil or gas bearing well.

Abstract: An aqueous, viscoelastic fluid gelled with a viscosifier, e.g. a viscoelastic surfactant, is stabilized and improved with an effective amount of a particulate additive such as alkaline earth metal oxides, alkaline earth metal hydroxides, transition metal oxides, transition metal hydroxides, post-transition metal oxides, and post-transition metal hydroxides. These fluids are more stable and have a reduced or no tendency to precipitate, particularly at elevated temperatures, and may also help control fluid loss. These particulate additives have unique particle charges that use chemisorption, “crosslinking” and/or other chemistries to associate and stabilize the VES fluids, and also help trap or fixate formation fines when placed in a gravel pack or a proppant pack in a fracture. Some of these effects may be more pronounced the smaller the size of the particulate additive.

Abstract: A downhole wellbore filtercake breaker is disclosed comprising one or more breaker chemicals (or activators thereof) capable of being activated with radiation to form one or more breaker reaction products which in turn are capable of reacting with the filtercake to chemically break down the filtercake. There is also disclosed a conventional reservoir drilling fluid modified to include an inactive, delayed, or sequestered breaker chemical or an activator thereof, wherein the breaker chemical (or activator) may be activated directly or indirectly by radiation, such as, microwave, visible, uV, soft x-ray, or other electromagnetic radiation. Also disclosed are methods for creating these filtercakes, and then breaking them via deploying a source of radiation that can be energized proximate to the filtercake. The breaker may be regenerated downhole by reaction with the filtercake breakdown products, and subjected again to a source of radiation to continue the breakdown of filtercake.

Abstract: An abrasive slurry tool, the tool being attachable to a running string, the tool including a high-pressure assembly, the assembly including a nozzle assembly; and a low-pressure assembly in abrasive fluid communication with the high-pressure assembly, the low-pressure assembly comprising a low pressure holding tank configured to carry recharge abrasive fluid with the tool and method.

Abstract: In a well stimulation method, a subsurface formation is fractured by freezing a water-containing zone within the formation in the vicinity of a well, thereby generating expansive pressures which expand or created cracks and fissures in the formation. The frozen zone is then allowed to thaw. This freeze-thaw process causes rock particles in existing cracks and fissures to become dislodged and reoriented therewithin, and also causes new or additional rock particles to become disposed within both existing and newly-formed cracks and fissures. The particles present in the cracks and fissures act as natural proppants to help keep the cracks and fissures open, thereby facilitating the flow of fluids from the formation into the well after the formation has thawed. Preferably, the freeze-thaw steps are carried out on a cyclic basis. Optionally, propagation of the freezing front into the formation may be enhanced by the introduction of low-frequency wave energy into the formation.

Abstract: Methods of contacting a subterranean formation are described which provide improved control or reduction of particulate migration, transport or flowback in wellbores and reservoirs, and which may do so without sacrificing substantial hydraulic conductivity. One method comprises injecting into a well-bore intersecting the subterranean formation a fluid composition comprising a first component and a second component dispersed in a carrier fluid, at least a portion of the first component or second component being provided as at least one multicomponent article having an aspect ratio greater than 1:1.1; forming a network comprising the first component; and binding the network with the second component.

Abstract: A fracturing operation is done in open hole without annular space isolation. The annular space is spanned by telescoping members that are located behind isolation valves. A given bank of telescoping members can be uncovered and the telescoping members extended to span the annular space and engage the formation in a sealing manner. Pressurized fracturing fluid can be pumped through the telescoped passages and the portion of the desired formation fractured. In a proper formation, cementing is not needed to maintain wellbore integrity. The telescoping members can optionally have screens. Normally, the nature of the formation is such that gravel packing is also not required. A production string can be inserted into the string with the telescoping devices and the formation portions of interest can be produced through the selectively exposed telescoping members.

Abstract: A wellbore servicing apparatus, comprising an inlet space, a central space adjacent and in fluid communication with the inlet space along a central axis, a dome space adjacent and in fluid communication with the central space along the central axis, and a plurality of channels adjacent to and in fluid communication with the dome space, wherein the plurality of channels are radially spaced about the central axis, and wherein a channel axis of the at least one of the plurality of channels is incident the central axis by less than ninety degrees.

Abstract: An apparatus for selectively fracing a well includes a tubular body having an exterior surface, and an interior surface that defines an interior bore. An annular flow area that has at least one fluid flow port extends radially through the tubular body to permit fluids from the interior bore to pass through the at least one fluid flow port into a surrounding earth formation. An external sealing sleeve selectively covers the annular flow area. There is a pressure actuated sleeve shifting mechanism, where increasing pressure tending to cause axial movement of the external sealing sleeve. The axial movement is resisted until a pre-selected pressure threshold is reached to permit movement of the external sealing sleeve to open the at least one fluid flow port.

Abstract: A method and apparatus for introducing refrigerant into a wellbore, for freeze-fracturing a selected region of a subsurface formation, uses refrigerant diffuser pipe having multiple orifices in a selected pattern along a designated section of its length. The orificed supply tubing is disposed within a refrigerant return conduit, thereby forming a tubing annulus. A flow of liquid refrigerant is introduced into the diffuser pipe and flows through the orifices into the tubing annulus, with the orifices acting as expander means creating a pressure drop and causing vaporization of the refrigerant as it passes into the annulus. To facilitate use of the same diffuser pipe in different wells having different requirements, a helical orifice-isolation wrap may be disposed around the diffuser pipe, with the orifice-isolation wrap having orifice-plugging elements arrayed to effectively block fluid flow through selected orifices, while leaving other orifices open as required.

Abstract: Wellbore cleaning bits include a bit body, at least one cutting structure on the bit body, and a shank configured to attach the bit body to a drill string. Drilling systems for cleaning wellbores include a wellbore cleaning bit coupled to a drill string. The wellbore cleaning bit may include a casing bit body and a shank attached to the casing bit body and the drill string. A casing bit may be attached to a shank having a connection portion configured for attachment to a drill string to form wellbore cleaning bits for cleaning at least a section of a wellbore. Furthermore, a casing bit may be advanced into a wellbore using a drill string to clean a wellbore.

Abstract: A series of down hole tools are assembled from a common subassembly to which are added various specialty parts to make a flow back plug, a bridge plug or a plug with a disintegratable check valve. The subassembly may be used, as is, as a ball drop plug. The components may be added through either end of the subassembly without having to take the subassembly apart. The subassembly and specialty parts may be shipped to the customer so the end user may customize the subassembly to provide a plug operable to provide a variety of functions.

Abstract: A system for supporting tubing with an installable load shoulder. The system includes a wellhead formed with an enlarged first circumferential groove in the wall of the vertical bore of the wellhead, and a second circumferential groove extending upwardly or downwardly from the first circumferential groove. At least one opening is formed in communication with the second circumferential groove. An annular load shoulder is received within the first circumferential groove, and has an inner surface adapted to support a tubing hanger. The load shoulder is formed from at least three arc-shaped shoulder segments adapted to be received within the first circumferential groove. At least one of the shoulder segments has an engagement member configured to pass through the opening to be received within the second circumferential groove. Rotating the load shoulder such that the engagement member is out of alignment with the opening secures the load shoulder within the wellhead.

Abstract: A method of radially expanding a tubular element in a wellbore formed in an earth formation comprises arranging the tubular element in the wellbore such that a lower end portion of the wall of the tubular element extends radially outward and in an axially reverse direction so as to form an expanded tubular section extending around a remaining tubular section of the tubular element, whereby an annulus is defined between said expanded and remaining tubular sections, and axially extending the expanded tubular section by moving the remaining tubular section downward relative to the expanded tubular section so that said lower end portion of the wall bends radially outward and in an axially reverse direction. A diameter of the expanded tubular section is controlled by controlling a fluid pressure in the annulus.

Abstract: A technique facilitates coiled tubing operations in offshore environments. The technique employs a spooled device, which is disposed on a reel located on an offshore facility. A guide system is mounted on the offshore facility to guide the spooled device from the reel, along a desired path, and down through the floor of the offshore facility. The guide system enables the coiled tubing job to be conducted without requiring a line of sight along the coiled tubing as it is delivered down through the offshore facility.

Abstract: A downhole seal comprises a seal body having a swellable material configured to swell upon exposure to a swelling activator to establish a seal within a wellbore, and at least one protection element configured to protect at least a portion of the seal body when the downhole seal is translated within a wellbore. The protection element defines a reaming element configured to ream a portion of the wellbore while the downhole seal is translated therethrough.

Abstract: An method and apparatus for disbursing a pressurized liquid in the absence of electricity are disclosed. The method and apparatus for disbursing a pressurized liquid in the absence of electricity can include a gas source, a liquid source, a liquid pressurization system, and a liquid delivery system.

Abstract: An inert gas Fire Protection System (FPS) uses an inert gas rather than air in a dry or pre-action type FPS. The inert gas inhibits oxidation, galvanic corrosion, and/or bacterial growth, and hence mitigates Microbiologically Influenced Corrosion (MIC) and galvanic corrosion in the FPS piping. A zone purging valve, which may include a gas purity analyzer, is disposed at the end of each zone in the FPS. A controller over-pressurizes the FPS with inert gas, and bleeds the gas through the zone purging valves to a predetermined supervisory pressure. The pressurize/purge cycle is repeated to ensure inert gas of a predetermined purity level reaches all areas within the FPS. The purity of the inert gas is periodically measured in bleed operations. The inert gas may comprise Nitrogen, which additionally dries out residual water in the FPS due to a low dew point, further inhibiting MIC.

Abstract: A concealed sprinkler including a body having a proximal portion and a distal portion. The distal portion includes an annular wall defining a chamber and an opening in communication with the chamber. A deflector assembly is disposed within the chamber. A trigger assembly having a lever assembly engaged with an inner surface of the annular wall supports the deflector assembly in the first position, the trigger assembly including and a thermally rated plate assembly having a lip portion to substantially circumscribe and substantially cover opening and chamber.

Abstract: CPVC piping systems comprising a network of CPVC pipe lengths in which at least some of the pipe lengths are interconnected with mechanical devices having resilient sealing members that are chemically compatible with the CPVC composition are described herein. Repairs and system modifications can be made without the use of solvent cement. In-line joints are formed with a coupling device including a pair of arcuate coupling segments having a first end, a second end, and an interior concave surface extending between the first end and the second end. A longitudinal channel extends along the concave surface. At least one mechanical fastener is operative to detachably connect the pair of coupling segments. A resilient annular seal is located within the longitudinal channel of each segment. A branching device connects a branch pipe to a main pipe through an orifice in the main pipe utilizing a saddle-like sealing member.

Abstract: Protection systems and methods for heat-generating electronic devices are provided that include thermal management fluids that are fire extinguishing agents or can extinguish flames. The provided systems and methods include a recirculating thermal management fluid. The fluid circulates through a conduit that includes at least one valve. The valve can be opened in response to a stimulus, such as a flame or fire, diverting the fluid onto the heat-generating electronic device or onto a flame.

Abstract: The various embodiments herein provide a system and method for fire extinguishing in forests. The fire extinguishing system herein includes a first storage tank, a second storage tank, a first fire extinguishing element, a second fire extinguishing element, a cover provided on top side of the first storage tank, a compressed air inlet, an air regulator, one or more hosing hasps, one or more tarpaulin hoses, one or more hooks, one or more clips and locks, a nozzle attached to a bottom side of the tank and a pipe to lead compressed air to nozzle. In the first stage the helicopter carries the sand tank from the station/depot to the firing woods and starts bombarding the sand around and top of the fire and a second helicopter carries the water tank from the station to the top of the bombarded flames and starts spraying water before the flame starts again.

Abstract: A soil aeration apparatus may include aeration tines that are actuated by a relatively compact gear system that reduces the size and weight of the apparatus. In addition, a soil aeration apparatus may operate without a centrally disposed support shaft, thus enabling the tine-holder shafts to be positioned closer to one another and reducing the size of the apparatus.

Abstract: A soil aeration device may include a plurality of arcuate blades mounted to an assembly adapted to rotate and translate the blades proximate a ground surface, thereby forming aeration pockets in the soil. In certain embodiments, the arcuate tines penetrate and fracture the soil while minimizing the amount of soil lifted from the pocket deposited on the top of the soil. In various embodiments, a planetary gear assembly imparts to the tine a translational and rotational movement which creates a fractured pocket in the soil while minimizing the amount of soil lifted from the pocket and deposited on the surface of the soil. In still other embodiments, the arcuate tine may have mounted thereon a coring tube that cuts and removes a plug from the pocket formed in the soil.

Abstract: An aerating device for attachment to a self-propelled lawnmower is disclosed. The device comprises a frame having a proximal end, a distal end, and a pair of sides extending between the proximal end and the distal end. An axle is mounted to the frame and extends between the sides of the frame. At least one tine assembly is mounted to the axle for rotation about a tine axis extending longitudinally through the axle. A platform is secured to the frame and extends outwardly from one of the proximal and distal ends of the frame for supporting an operator in front of or behind the at least one tine assembly.

Abstract: A control method according for an impact wrench includes ascertaining whether the impact wrench applies an impact when the drive shaft rotates in a lower speed range. The speed of the drive shaft then is increased to a higher speed range as a function of an ascertained impact during the rotation in the lower speed range.

Abstract: An improved method is provided for controlling a power tool having a rotary shaft. The method includes: disposing an inertial mass in a housing of the power tool, such that the inertial mass is freely rotatable about an axis of rotation which is axially aligned with the rotary shaft; monitoring rotational motion of the power tool in relation to the inertial mass during operation of the power tool; and activating a protective operation based on the rotational motion of the power tool in relation to the inertial mass.

Abstract: A vibratory pile driver configured to insert curved sheet pile beneath a conduit by rotating the pile driver about a fixed pivot element to advance the curved sheet pile along a fixed arc. In one exemplary embodiment, the distance between the fixed pivot element and the clamps that secured the curved sheet pile to the pile driver is the same as the radius of curvature of the curved sheet pile. In another exemplary embodiment, when the curved sheet pile is secured to the pile driver by the clamps, the center of the radius of curvature of the curved sheet pile lies substantially on the rotational axis of the fixed pivot element. In this embodiment, the vibratory pile driver may be rotated about the fixed pivot element to advance the curved sheet pile along an arc having curvature substantially identical to the radius of curvature of the curved sheet pile.

Abstract: A hand-held power tool includes a main handle, a percussion mechanism striking along a percussion axis, a counter mass displaceable along an oscillation axis which is inclined to the percussion axis and biasing means for preloading the counter mass to a rest position on the oscillation axis. The counter mass is arranged such that the rest position is closer to the main handle than the center of gravity is to the main handle.

Abstract: A pneumatic striking mechanism includes a guide cylinder in which a freely moving piston and an exciter piston are arranged movably along a striking axis. The guide cylinder has a plastic. The striking mechanism includes a pneumatic chamber sealed off by the guide cylinder, by the freely moving piston and by the exciter piston, as well as a drive for periodically moving the exciter piston, as a result of which the freely moving piston is excited to execute a periodical movement between the striking surface and the exciter piston.

Abstract: The invention relates to a hand-guided electric tool having a motor and a pulse width modulator for generating a pulse width modulated signal for operating the motor. A unit is provided for reducing the EMC interferences emitted by the electric tool.

Abstract: The invention relates to a hand-held power tool having a two-part housing, both housing parts being held together, by means of a connecting part, in such a manner that the housing parts can move in relation to each other.

Abstract: A grounding assembly for electronic equipment provides a discharge path for the energy arising from lightning strikes. A conductive strap connects the ground lug of the equipment to a ground plate buried in the earth. The conductive strap has a length, width and thickness, with the width being greater than the thickness. This reduces the inductance of the conductor from the controller to the ground plate, thereby enhancing the ability of the grounding assembly to dissipate energy from lightning strikes.

Abstract: A lightning protection system is provided, typically for use on an outer surface of an aircraft, which includes the use of a lightning protection sheet that includes an electrically conductive film patterned into a plurality of hill features. The lightning protection sheet may additionally include an electrically non-conductive discriminator layer over the electrically conductive film.

Abstract: An electrical box includes a top side wall, a right side wall, a bottom side wall, a left side wall, and a rear side wall. At least one check valve is disposed in an opening through at least one of the top side wall, the right side wall, the bottom side wall, the left side wall, or the rear side wall. The check valve defines a central opening through which insulation may be introduced to fill an air gap at least one of behind or around the electrical box. A method for introducing insulation through the electrical box also is described.