Abstract: A valve includes a housing having an inlet (3), an outlet (1) and a movable sealing member (2) which allows the inlet (3) and the outlet (1) to be connected in fluid communication with each other, the sealing member (2) having associated therewith effective areas (4b) to which pressure can be applied, and sealing areas (4), and the sealing member (2) further having associated therewith a sealing seat (4a) for sealing the inlet (3) from the outlet (1). In order to provide a valve by which pressure can be relieved in a very short time, the sealing member (2) has associated therewith a conduit (2a) by which the inlet (3) and the outlet (1) can be connected in fluid communication with each other when the sealing member (2) rests on the sealing seat (4a).

Abstract: To prevent plastic deformation of a bellows due to a pressure difference between inner and outer sides of the bellows in an outside gas type or inside gas type accumulator, a disc-like gasket is held in a floatable state to a surface close to a stay in a bellows cap by a gasket holder, so that, the disc-like gasket moves together with the bellows cap at a steady operation time, the disc-like gasket moves together with the bellows cap to contact with an end surface portion of the stay, thereby closing the liquid chamber at a zero-down time, and the bellow cap moves toward a position where liquid pressure and gas pressure balance while the disc-like gasket keeps contacting with the stay due to a difference of pressure receiving areas in both the surfaces when the liquid in the liquid chamber is thermally expanded at a zero-down time.

Abstract: A hydraulic restrictor comprising: a passage along which hydraulic fluid flows; a member which extends along the passage, the member restricting the flow along the passage; and structure for selectively securing the member at a plurality of different positions along the passage thereby to enable variation in the restriction on flow along the passage, the securing structure securing the member at each position by securing the member against the side wall of the passage.

Abstract: A magnetic dust cap for a pneumatic tire comprising an external valve stem having a threaded top portion having a width, a length, a top end and a bottom end and a rubberized bottom portion having a width and a top end. The magnetic dust cap comprises a body for capping the external valve stem and magnetic means disposed within the body to removably adhere to a washer. The washer is adapted for threaded engagement over the threaded top portion of the valve stem.

Abstract: The present invention relates to a double wall pipe with an inner high pressure pipe (1) having an inner flow space for harmful and/or flammable liquids, particularly fuel to be infected or hydraulic oil, and with an outer protection pipe (2) coaxially arranged around the inner pipe, having an enter flow space between inner pipe and outer pipe, for possibly leaking or spilling liquid from the inner pipe, wherein the protection pipe (2) has several substantially longitudinal arranged grooves (23) throughout its inner surface (21); the inner high pressure pipe (1) is fitted tightly into the protection pipe (2); and after bending the double wall pipe (100), the double wall pipe (100) is unified by surface pressure due to deformation of bending process.

Abstract: A flexible tubular conduit for transporting hydrocarbons comprising at least two metal sheathing covers which are separated by a plastic anti-wear layer. Each cover is produced by helically winding a metal longitudinal element. The anti-wear layer is produced by helically winding a plastic material strip. The plastic material comprises an amorphous polymer with a glass transition temperature ranging from 175 to 255° C.

Abstract: This invention relates to a hollow profile (1) used for the manufacture of a spirally wound double-walled thermoplastic pipe, which hollow profile has essentially a rectangular cross section and the wall (2) of the hollow profile intended to form the inner wall of the pipe is thicker than the wall (4) intended to form the outer wall (4) of the pipe. The invention is characterized in that the inner rounding radius (7a) of the edges adjacent to the thicker wall (2) of the hollow profile is considerably larger than the rounding radius (7) of the two other edges of the cavity (6).

Abstract: Fabric support and a weaving machine using the support, in which the fabric support (1) includes several supporting elements (10, 11, 12, 13, 14, 15, 16, 17, 18, 19) which can be arranged next to one another and a profiled section (20, 30, 40, 50, 60) which is supported by the supporting elements (10, 11, 12, 13, 14, 15, 16, 17 18, 19) and includes a guide surface (22) for a fabric (3).

Abstract: An upper side for a multiple-layer sheet-forming fabric has a multiplicity of longitudinal threads woven with a multiplicity of transverse threads and thereby form repeats in the longitudinal and transverse directions. The transverse-thread repeat contains three times as many threads as the longitudinal-thread repeat. The longitudinal-thread repeat has at least three threads. The transverse-thread repeat has at least nine threads. All longitudinal threads run alternately over three transverse threads and under three transverse threads, and subsequently under the remaining transverse threads of a transverse thread repeat. Two directly adjacent longitudinal threads are displaced with respect to one another in the longitudinal direction by at least three transverse threads.

Abstract: A double yarn airbag fabric is disclosed, which may include an inflatable fabric portion, comprising multiple first yarns that form multiple sets of first yarns, and multiple second yarns. At least two sets of first yarns are alternately woven around at least two adjacent second yarns at each weave. The result of weaving are two opposing woven fabric layers formed from two pairs of the alternating second yarn sets, such that a space to be inflated is formed between the two opposing fabric layers. The two opposing fabric layers may be formed in a continuous weaving process. The fabric also includes a non-inflatable fabric portion by alternately weaving two pairs of alternating first yarn sets around two adjacent second yarns at each weave, to form a single, woven fabric layer. The multiple first yarns may include warp yarns and the multiple second yarns may include weft yarns, or vice versa.

Abstract: A portable device for delivering nitrogen to multiple tires includes a gas source and supply line connected to a controller. The device also includes a gas delivery line comprising a manifold with a plurality of outlets in fluid communication with each other. A gas delivery line is operably connected to the controller and a plurality of extension lines with engagement chucks are operably connected to the outlets. The controller controls the supply of gas to the gas delivery line and controls a relief valve for venting the gas delivery line. The device also includes a sensor and a processor connected the controller and sensor which accepts user inputs. The controller, manifold and processor are affixed to a stand.

Abstract: A method of conditioning a compacted polymeric powder to a flowable and meterable state. The polymeric powder is compacted during transport such that the flowability is hindered. To increase flowability, gas is introduced into the polymeric powder to condition the same to an improved flowable and meterable state.

Abstract: An in-structure air delivery system comprises a control panel and a plurality of air delivery lines. The control panel is located at a first location in the structure and has an air supply inlet. Each air delivery line extends from the control panel to a different location in the structure. Valves are configured to selectively control the flow of air through each of the air delivery lines. In a method of use, a high pressure air supply such as a portable compressor is connected to the inlet of the system. Air is selectively delivered to one or more of the delivery lines. A control unit is connected to the outlet of the delivery line. Air is supplied to the control unit. The control unit is used to regulate the flow of air to a component of breathing equipment, such as to a firefighter's breathing equipment air cylinder to be re-filled.

Abstract: The present invention provides a peelable seal for a multi-chambered container including a first edge and a second edge. At least one of the first edge or second edge includes a stress bearing portion and a non-stress bearing portion.

Abstract: A pressure-actuated air gun having an actuating port in the nozzle of the gun such that, when the actuating port becomes blocked, as by inserting the nozzle of the gun into a coupling on an article to be inflated or deflated, air is caused to pass from a source of pressurized air to the gun. When the actuating port becomes unblocked, as by disengaging the nozzle of the gun from the coupling, air is inhibited from passing from the source of pressurized air to the gun. An air pilot actuated valve is interposed between the source and the gun, and is controlled by air pressure that builds up when the actuating port becomes blocked by the coupling.

Abstract: Methods and apparatus are disclosed for filling solid particles into a vertical tube by conveying the particles downwardly into the tube along a loading tool that softens the fall of the particles and provides even filling of the tube. The loading tool includes a center member and a plurality of damper members that can be adapted in particular cases to the actual type of particles and the tube diameter. The damper members can be stiff or flexible since they do not occupy a substantial portion of the cross section of the tube at any particular axial location. In operation, the center member can be jerked during the filling operation while simultaneously being lifted up gradually as the tube fills or it can be sequentially lifted. The damper members reduce the falling velocity of the particles and divert the particles from falling in straight downward paths. This avoids bridge formation and breakage of the particles during filling.

Abstract: A funnel system and method for introducing and dispensing a material are presented. In this funnel system two frusto-conical devices having intake ports which have a larger diameter than the diameter of their exit ports may be mated. When mated, a passage exists through the devices' exit ports. Both frusto-conical devices may have partially eclipsed exit ports such that when one device rotates with respect to the other, the passage throttles between a substantially open and a substantially closed position. In this method the devices may be rotated such that the passage may be in the substantially closed position and a material may then be introduced into the second device's intake port. To dispense the material, the devices may be rotated such that the passage may be in a substantially open position whereupon the material may be dispensed from the first device's exit port.

Abstract: A ring saw includes a disc body having a circumferential edge with a first circumferential bearing groove. A cutting ring is mounted for rotation about the circumferential edge of the body. The cutting ring has an inner annular surface that carries both a circumferential gear profile and a second circumferential bearing groove. Ball bearings are positioned in side by side relation in a circumferential bearing race defined by the first circumferential bearing groove and the second circumferential bearing groove. A circumferential seal is provided between the body and the cutting ring, which is adapted to prevent abrasives from entering into the bearing race and interfering with ball bearings. At least one driving gear is carried by the body and engaged with the circumferential gear profile to impart rotational movement to the cutting ring.

Abstract: A device for machining, in particular, profiling tree trunks is provided, which includes two rotating machining tools (2, 3), whose axes (A, B) are essentially offset by 90° in relation to one another and are oriented in an essentially perpendicular direction to the longitudinal axis of the tree trunk. The first machining tool (2) and the second machining tool (3) are arranged in relation to one another in such a way that the first axis (A) and the second axis (B) lie on a common plane (E) and/or that their respective workpiece machining zones (I, II) at least partially overlap one another in the transversal direction of the tree trunk or adjoin one another.

Abstract: The present invention relates to a safety workbench having a working inner chamber enclosed by a housing, whose bottom terminus is formed by a floor trough and which is accessible on a housing front side via a work opening closable using an adjustable front pane. The floor trough is implemented as double-walled and has an internal and an external wall, which enclose an intermediate chamber, which may be placed under vacuum, between them, at least one of the walls having at least one opening which is connected to means for generating the partial vacuum.

Abstract: A pneumatic tire is provided with an electrically conductive path extending continuously from a position in the rim contacting surface to a position in the ground contacting surface through a sidewall portion, wherein a sidewall rubber is a high-performance rubber compound and almost-insulative, having a volume resistivity of not less than 1×10^8 ohm cm. The electrically conductive path includes a helical path made of an electrically conductive rubber having a volume resistivity of not more than 1×10^7 ohm cm. The helical path is disposed axially inside the sidewall rubber and extends spirally around the tire rotational axis. Preferably, the tread rubber, clinch rubber and carcass topping rubber are also almost-insulative high-performance rubber compounds.

Abstract: Provided is a pneumatic tire in which left- and right-side lateral grooves extend between first main grooves and second main grooves, and in which left- and right-side sub grooves extend halfway from the second main grooves toward the first main grooves. The lateral grooves and the sub grooves are disposed alternately with each other at predetermined pitches in tire circumferential directions. The left- and right-side lateral grooves respectively include: first groove portions extending from the first main grooves; and second groove portions extending from the second main grooves while curving inwardly toward tire width directions. The left- and right-side lateral grooves are offset from each other in the tire circumferential directions. Opening portions at both ends of each of the lateral grooves, which are opened to the first main grooves and the second main grooves, are shifted from one another in the tire circumferential directions.

Abstract: The present invention provides a reinforced lightweight air bladder for a safety tire which can effectively suppress a radial growth under the normal running condition even if it is used for a long tire and, on the other hand, to suppress an occurrence of a crack in a tube under the runflat running condition, thereby exhibiting a superior durability. A hollow toric reinforced air bladder 1 is to be accommodated in a tire 2 to form a safety tire. The reinforced air bladder 1 is filled with the air at an internal pressure determined in relation to a given air pressure of the tire 2 to form a cavity S1 in tire 2. When the internal pressure of the cavity S1 of the tire 2 is dropped due to getting punctured or the like, the reinforced air bladder 2 is radially expanded to take over load support from the tire 2. The reinforced air bladder 1 comprises an air-impermeable tube 6 and a reinforcing hoop layer 7 surrounding entirely an outer circumference of a crown portion of the tube 6.

Abstract: According to the invention, a processing aid is used to improve processing in a green (uncured) rubber composition, such as in downstream in-plant processing of an innerliner compound, and maintaining, or more preferably, reducing the air permeability of the cured composition, e.g., innerliner compound. In embodiments, another of the advantages of the present invention is that the processing aid according to the invention can be used in very low levels relative to the other processing aids and oils.

Abstract: A plant for producing types of tyres different from each other includes a manufacturing unit including a plurality of work stations, devices for transfer and movement of the tyres being produced, and a vulcanizing unit including vulcanizing moulds for the tyres being produced. Each work station is designed to assemble at least one corresponding structural component on at least one type of tyre being produced. The devices for transfer and movement operate between the work stations and provide selective movement for each of the types of tyres being produced in proximity to corresponding work stations. The plant may also include a central processing unit. The central processing unit may control the devices for transfer and movement to coordinate processing stages for each type of tyre in the manufacturing unit and in the vulcanizing unit. Additionally, the plant may include holding stations associated with at least some of the work stations.

Abstract: The invention relates to a shutter for a roller shutter assembly, the shutter comprising a series of shutter panels (10) and a plurality of connecting arms (20). The shutter panels (10) each have an upper edge (11) and a lower edge (12), a first face (13) and a second face (14), and the first faces (18) all face to a first side of the shutter and the second faces (14) all face to an opposite second side of the shutter. The connecting arms (20) each have a lower edge (21) and an upper edge (22), a lower one of two adjacent shutter panels in the series is pivotally connected to a higher one of the two adjacent shutter panels by at least two of the connecting arms (20). The lower edge (21) of each of the at least two connecting arms (20) is pivotally connected to an upper pivotal connection on the first face (13) of the lower of the two adjacent shutter panels, the upper pivotal connection being spaced below the upper edge of the lower shutter panel (10).

Abstract: An overhead garage door has an apparatus for pinch resistant operation. The garage door may include horizontal sections and the door may be formed from a plurality of these sections, arranged in a stack, and pivotally connected to adjacent sections. The apparatus, such as meeting rails, may be attached to adjacent horizontal sections to mask the appearance of a seam created as adjacent sections are joined or provide pinch resistant operation.

Abstract: A support assembly is provided for a roller tube having a sheet material wound therearound. The support assembly has opposed first and second mounts adapted to support the roller tube, which is rotatably coupled to the mounts. At least one support cradle is disposed between the first and second mounts. The support cradle is configured to support the roller tube along a length thereof A biasing member is arranged to reduce a force of the roller tube in a direction toward the support cradle, thereby preventing the sheet material from binding against the support cradle as it winds and/or unwinds.

Abstract: A release agent spray method and apparatus for a die casting machine. As a movable die plate is moved in a die closing direction, a spray head is moved in a perpendicular direction to a spray position. The movable die plate is stopped when it has reached a position at which the distance between the spray head and a die cavity surface of a movable die and the distance between the spray head and die cavity surface of a fixed die both become equal to a spray distance. A release agent is sprayed from the spray head onto the cavity surfaces of the movable die and the fixed die.

Abstract: A vent assembly (453) for a high pressure die casting system including a pair of opposed chill blocks (450, 452) having corresponding chill surfaces defining a continuous vent chamber therebetween, each of the chill surfaces comprising a plurality of adjoining chill faces (62, 136, 162, 163, 170) extending the length of the vent chamber, each chill face having a corresponding chill face on the paired chill block defining a section of the vent chamber, the plane of each chill face being oriented at an angle to an adjoining chill face on the corresponding block. Preferably the chill face on a chill block is substantially equidistant from the chill face of the corresponding chill block defining the respective section of the vent chamber.

Abstract: Control is provided over the pouring of iron in the casting of iron pipe in a centrifugal casting machine. The initial flow of molten iron from the pouring ladle into the trough actuates an electric eye. A second electric eye is actuated when the molten iron has filled the pouring ladle. The centrifugal casting machine is rolled up to surround the trough, the bell end of the pipe to be formed being at the end of the trough. The molten iron is poured into the casting machine trough and flows into the bell section of the pipe being cast. The casting machine is then moved away from the trough end to form the rest of the pipe.

Abstract: The invention relates to a moulding mixture for producing casting moulds for metalworking, a process for producing casting moulds, casting moulds obtained by the process and also their use. To produce the casting moulds, a refractory mould raw material and a binder based on water glass are used. A proportion of a particulate metal oxide selected from the group consisting of silicon dioxide, aluminium oxide, titanium oxide and zinc oxide is added to the binder. Particular preference is given to using synthetic amorphous silicon dioxide as metal oxide.

Abstract: A modular capillary pump loop (CPL) cooling system and associated components. The modular CPL cooling system transfers heat from high-power circuit components, such as microprocessors disposed within computer chassis, to other locations within or external to the chassis, where the heat can be more easily removed. In various embodiments, the CPL cooling system includes one or more evaporators connected to one or more condensers via flexible liquid transport and vapor transport lines. A wicking structure, such as a volume of sintered copper, is disposed within each condenser. The wicking structure draws working fluid (e.g., water) in a liquid state into the evaporator based on a capillary mechanism and a pressure differential across a meniscus/vapor interface on an upper surface of the wicking structure. As the liquid meniscus is evaporated, additional fluid is drawn into the evaporator. The working fluid is then condensed back into a liquid in the condenser.

Abstract: A supporting body within an isothermal plate includes a flat plate having two surfaces, and a plurality of bosses and pits arranged on both surfaces of the plate. The plate is provided thereon with a plurality of through holes. The though holes are located between the bosses and pits respectively. A portion of the bosses and pits protrudes from one surface of the plate, and the other portion thereof protrudes from the other surface of the plate.

Abstract: The invention provides for an orientation insensitive heat exchanger assembly for cooling an electronic device comprising a hermetically sealed housing defining a boiling chamber and two condensing chambers. A partition is disposed in the boiling chamber and defines two sets of alternating channels extending in overlapping relationship to one another and with one set of alternating channels open to one of the condensing chambers and the other set of alternating channels open to the other condensing chamber for sealing the condensing chambers from one another. Coolant is maintained in each of the condensing chambers. In operation, if the thermosiphon is tilted with one side lower than the other, the channels open to the lower side are empty of coolant into the lower condensing chamber while the channels open to the opposite upper side hold the coolant over the entire boiling chamber aligning with an electronic device to continue cooling.

Abstract: A method for manufacturing a plate-type heat exchanger in which a heat medium is sealed in a hollow part of an airtight structure formed in the interior of a plate-like container, and the heat medium is moved by capillary force from a condensing part to an evaporating part in the hollow part along heat-medium-guiding grooves formed in the container's inside surface portions that face the hollow part; wherein a plastic workable metal plate of specific thermal conductivity is prepared; a carving tool is used to repeatedly carve out a surface portion of the metal plate at specific intervals along the surface portion, forming a plurality of plate-like fins; and a plurality of grooves formed between these fins is used as heat-medium-guiding grooves.

Abstract: A gas lift production apparatus is provided for use in flushing and snubbing well operation. The apparatus comprises upper production string and lower production string. The upper production string includes at least one side pocket mandrel carrying a gas lift valve, tubular strings connected with every side pocket mandrel, a sliding sleeve installed as part of the production string below side pocket mandrels and a latch seal assembly threaded in the tubular string below the sliding sleeve. The lower production string includes a single bore packer below the latch seal assembly, tubular strings, a landing nipple and a bell mouth at the bottom of the production string. The upper production string are run in and removed as a single unit from the packer which is anchored within the well casing. It is emphasized that this apparatus is provided with three functions such as producing a gas lift well, flushing well and snubbing well operation.

Abstract: A tubular handling torque multiplier includes a torque input end for connection to the quill of a top drive, a torque output end for connection at least indirectly to a well tubular joint to be driven to rotate, gears for adjusting the torque output from the torque output end from that torque input at the torque input end, an axial support between the torque input end and the torque output end to allow axial stress to be communicated from the torque output end to the torque input end and a fluid circulating path open between the torque input end and the torque output end.

Abstract: A groundwater collecting apparatus which can continuously collect groundwater, and can selectively collect groundwater at a specific depth by directly generating vertical movement is provided. The groundwater collecting apparatus includes: a vibration unit selectively admitting groundwater which exists in the monitoring well according to vibration in a vertical direction; a driving unit being supplied a power to vibrate the vibration unit in a vertical direction; and a hollow guide pipe being connected to the vibration unit to guide the groundwater to a ground, the groundwater having flowed into the vibration unit through a channel inlet of the vibration unit.

Abstract: The completion system for delivering lifting gas supplied from surface via a casing annulus thru the packer for injecting to the wellbore at bottom hole as lifting gas for maximizing hydrocarbon producing from a subterranean well while maintaining integrity and serviceability as a typical gas lift well. A single completion, which uses the same tubing string for both producing the well and delivering lifting gas to the wellbore at downhole. The top section of the tubing is used for producing the well while the bottom section of the tubing is used for delivering lifting gas for injecting at bottom hole. The lifting gas will be injected to the wellbore proximately at perforation intervals for helping unloading liquid and producing the well. The use of modified equipment named “TK Bypass Mandrel” and “JP Bypass Nipple Sub” allows delivering and controlling of the lifting gas for injecting at bottom hole via a single tubing string.

Abstract: A method for inducing motion in solid particulates in a solid/liquid mixture located in proximity to the periphery of a wellbore or in the formation zone adjacent to a wellbore in an oil or gas formation. The method includes introducing a gas impulse device into the wellbore. It then requires firing the gas impulse device so as to generate impulses of high pressure compressed gas, thereby to produce pressure waves within the wellbore and its surrounding formation. This causes motion of the solid particulates which permits settling and/or redistribution of the solid particulates. In some cases it even causes particulate flow, as in cold heavy oil production with sand (CHOPS). The method also frees blockages caused by the solid particulates and stimulates productivity. The method may inter alia be used in gravel pack construction and maintenance, well cementing operations and in CHOPS stimulation.

Abstract: Downhole tools attached to a wireline are frequently used to perform well operations at a selected depth. However, the downhole tools may be placed at the incorrect depth if the well operator fails to account for creep, i.e. the movement of downhole tools after the wireline is stopped at the surface. This invention provides a method for determining when the well operator should account for creep. The invention further provides methods for determining the magnitude of creep when it is determined to be present. The subsequent positioning of downhole tools may be adjusted according to the magnitude of creep, thus preventing incorrect placement of downhole tools within the wellbore. The methods use equipment and logging data that are readily available during any wireline operation.

Abstract: A process for enhanced oil and gas recovery. An enriched flue gas is synthesized from utility plant flue gas. The enriched flue gas is customizable for specific requirements; however, the gas is formed to have a high concentration of carbon dioxide. This is used as an injectant for enhancing the liberation of gas and/or oil from subterranean formations. The injection elevates recovery while sequestering carbon dioxide from the power plant source.

Abstract: A method for enhancing oil recovery includes the step of providing a subsurface reservoir containing hydrocarbons therewithin. A wellbore is provided in fluid communication with the subsurface reservoir. A surfactant-polymer solution is formed for injection into the reservoir. The surfactant-polymer solution is formed by mixing a composition with at least one surfactant, at least one polymer, and at least one co-solvent or co-surfactant such that the surfactant-polymer solution is clear and aqueous stable. The surfactant-polymer solution is injected through the wellbore into the reservoir. A chaser solution is formed for injection into the reservoir. The chaser solution has an additional predetermined quantity of the co-solvent or co-surfactant. The chaser solution is injected through the injection wellbore into the reservoir to increase the production of hydrocarbons from the reservoir while maintaining the clear and aqueous stability of the surfactant-polymer solution.

Abstract: There is a method for enhancing the recovery of oil from a reservoir. The method has the step of a) introducing a flooding fluid into the reservoir and b) extracting the oil through a wellbore at a location different than the point of introduction of the flooding fluid into the reservoir. The flooding fluid has water and an amount of one or more non-polymeric viscoelastic surfactants sufficient to provide an interfacial surface tension of about 1 mNm or less and a viscosity of about 10 cps or more. The one or more surfactants is selected from the group of one or more cationic surfactants, one or more zwitterionic surfactants, one or more amphoteric surfactants, one or more anionic surfactants, and combinations thereof.

Abstract: The recovery of hydrocarbons from hydrocarbon bearing rock, sands or other geological materials (collectively “rock”) uses a recovery fluid. In certain embodiments, the recovery fluid includes miscible compounds or an azeotrope-forming mixture (including an azeotrope), used alone or with other compositions. Two or more compounds in the recovery fluid yield a mixture with different and/or improved characteristics over those of one or more of the component compounds in both liquid and vapor states.

Abstract: A method is described for treating a subterranean formation with a low viscosity fluid system that contains a viscoelastic surfactant at a concentration too low to viscosify the fluid, but that is concentrated in the formation so that the fluid system gels. The fluid optionally contains a formation-dissolving agent. The fluid is used in matrix acidizing, acid fracturing, and diversion.

Abstract: Methods and system are described for providing electric power in a wellbore including at least one thermoelectric generator at a downhole location; and one or more thermally insulated sections of wellbore tubing located such as to reduce heat loss of fluid flowing through the wellbore from the entry point of the fluid to the location of the generator.

Abstract: A downhole burner for a steam generator includes an injector and a cooling liner. Steam enters the burner through holes in the cooling liner. Combustion occurring within the cooling liner heats the steam and increases its quality and may superheat it. The heated, high-quality steam and combustion products exit the burner and enter an oil-bearing formation to upgrade and improve the mobility of heavy crude oils held in the formation. The injector includes a face plate, a cover plate, an oxidizer distribution manifold plate, and a fuel distribution manifold plate. The cooling liner has an effusion cooling section and effusion cooling and jet mixing section. The effusion cooling section includes effusion holes for injecting steam along the cooling liner surface to protect the liner. The effusion cooling and jet mixing section has both effusion holes and mixing holes for injecting steam further toward central portions of the burner.

Abstract: Methods of hydraulically fracturing subterranean coal seams and formations resulting in improved permeability to stimulate Coalbed Methane. In one method, the coal seam is fractured using a proppant-containing fracturing fluid in alternating stages with an aqueous base solution that etches the fracture faces of the coal thereby creating channels for fluid flow. In another method, the coal seam is fractured using a fracturing fluid without propping agents in alternating stages with an aqueous base solution that is pumped at a pressure sufficient to maintain the fractures in an open position thereby etching the fracture faces to create channels for fluid flow. In yet another embodiment, a base solution is injected into the formation at a pressure sufficient to create fractures therein and simultaneously etch the faces of the open fractures to thereby form channels in the faces for increased fluid flow.