Abstract: A flow monitoring system can have a plurality of sensors located at monitoring locations along a tubing string inserted into an injector well of a secondary recovery operation. The sensors are configured to monitor a measurable property of fluids flowing in a bore of the tubing string or in an annulus formed between the tubing string and injector bore to determine the presence of said injected fluids at each sensor. At least two fluids having different values of the measurable property are injected into the injector well in an alternating manner and at a known injection rate. The flow rates of the fluids out of various injection zones of the injection well can be calculated using the arrival times and the known injection flow rates of the fluids, cross-sectional area of the fluid conduit(s) through which the fluids travel, and distances between the sensors or between surface and the sensors.

Abstract: A method involving introducing a perforation string into a wellbore passing through a subterranean formation, the perforation string having a perforation gun and a releasable tracer, the releasable tracer being releasable in response to a fluid produced from the subterranean formation contacting the nearby perforation string. The method includes perforating, with the perforation gun, a surface of the wellbore and withdrawing fluid from a wellbore. The method further includes allowing the releasable tracer to release from the perforation string after the fluid produced from the formation contacts the perforation string and flows toward an entrance of the wellbore. Finally, measuring at least one of an amount or presence of the releasable tracer thereby indicating at least one of an amount or presence of the fluid produced from the subterranean formation.

Abstract: An inexpensive electrically conductive carrier is added to well bore fluids thereby allowing for a closed loop real-time data communication system for topside management of all downhole equipment including drilling, completion, production, logging, and workover equipment. Conductive carrier fluid provides a “real-time” digital and analog bi-directional data and communication solution between the surface operations of a well-bore and downhole tools. Conductive carrier fluid provides for the application of more sophisticated software essential for exact control requirements of sophisticated downhole equipment, thereby achieving optimized tool performance as well as future downhole tools.

Abstract: NMR tools are described having unidirectional magnetization throughout the magnet assembly. An antenna assembly is positioned around the magnet assembly in order to excite a volume in the surrounding subterranean formation. A layer of soft magnetic core material is positioned under the antenna assembly in order to shield all or most of the RF field generated by the RF antenna away from the conductive components inside the NMR tool. The conductive components may be conductive structural members or a conductive magnet assembly. The soft magnetic core material also shapes the static magnetic field by smoothing out the longitudinal magnetic field variation.

Abstract: A mineshaft-stratum fracture coupled flowing simulation experiment device includes a simulated mineshaft flowing system, a simulated stratum system, a simulated fracture system and a data acquisition system. The simulated mineshaft flowing system includes simulated mineshaft, simulated drilling rod, drilling fluid storage tank, stirring motor, and drilling fluid screw pump. The simulated drilling rod is located in center of the simulated mineshaft. The stirring motor is provided in the drilling fluid storage tank. The drilling fluid screw pump is connected to an inlet end of the simulated drilling rod through the drilling fluid storage tank. The simulated stratum system includes simulated stratum, clean water storage tank, separation tank, gas storage tank, gas air-compressor, and clean water screw pump. The gas storage tank is connected to the gas air-compressor and is connected to the simulated stratum through a gas pressure regulating valve.

Abstract: Respective embodiments disclosed herein include methods and apparatuses (1) for surveying a mine bench or other material body using at least seismic data obtained via geophone and measurement module data synchronized via a wireless link; (2) for generating hyperspectral panoramic imaging data of a blast hole or other borehole; or (3) for allowing a neural network to facilitate a differential blast design that targets a first bench part more weakly than the differential blast design targets a second bench part (along the same mine bench) at least partly based on data indicative of a much higher concentration of a valuable material in the second bench part than in the first.

Abstract: An improved formation testing method for measuring at least three formation parameters such as spherical permeability, permeability anisotropy, well bore skin damage, with at least two short duration pressure tests using a formation tester with two or more probe flow areas of different shapes.

Abstract: The invention relates to a method of determining an unknown property or information of a reservoir fluid. The method includes measuring a set of responses of a measuring instrument to the fluid and measuring one or more physical or chemical properties of the fluid. The method further includes determining the unknown property or information of the fluid based on the relationship between the instrument responses and the measured properties of the fluid using equation-of-state (EOS) model.

Abstract: A well testing tool mounted on a drill string is positioned within a zone of interest in a wellbore. An RFID tag with a density between 400 and 500 pounds per square foot is dropped through the drill string to activate the well testing tool. An uphole packer positioned at an uphole end of the well testing tool and a downhole packer positioned at a downhole end of the well testing tool are expanded to isolate a portion of the zone of interest between the expanded uphole packer and the expanded downhole packer. A three-way valve positioned between the uphole packer and the downhole packer is adjusted to allow fluid to flow from the isolated portion of the zone of interest into the drill string. One or more sensors within the well testing tool are activated.

Abstract: A cutting device for engaging a rock face includes a disc body supported for rotation about an axis of rotation, and a plurality of peripheral portions removably secured to the disc body. Each of the peripheral portions including a plurality of cutting bits positioned on a peripheral edge. The peripheral edge of each peripheral portion is aligned with the peripheral edges of adjacent peripheral portions.

Abstract: The present application describes a rapid burrowing robot (RBR) that can dig tunnels using ultra high temperature rotating plasma torches.

Abstract: The frost-resistant assembled initial support structure of the tunnel for supporting a surrounding rock includes a bearing layer, an elastic compressible structure and an inflatable airbag. A gap space is formed between the bearing layer and the surrounding rock, and the inflatable airbag and the elastic compressible structure are provided in the gap space; and the inflatable airbag after being inflated and the elastic compressible structure jointly fill up the gap space. A construction method includes providing the bearing layer in the tunnel, and forming the gap space between the bearing layer and the surrounding rock; providing the inflatable airbag and the elastic compressible structure in the gap space; and inflating the inflatable airbag and filling up the gap space with the inflatable airbag and the elastic compressible structure.

Abstract: Provided is a mounting method for an extensible reaming self-anchoring anchor rod, which is especially applicable to roadway construction in coal mines. A big helical structure is arranged on two rod sections of a sectional type anchor rod, a simple drill bit drills and reams a bore and cuts the coal mass in one operation, the outer diameter of the simple drill bit is smaller than the outer diameter of the big helical rod body, and the big helical structure accomplishes secondary reaming, self-drilling and self-anchoring in the drilling process; the big helical structure inhibits propagation and development of sheet cracks of the coal wall in the radial direction, and is embedded in the coal mass through a self-stabilization process of the rock mass.

Abstract: Disclosed is a ground wellhole dedicated protective pipe for gas extraction of a mining-induced area. The ground wellhole dedicated protective pipe for gas extraction of a mining-induced area is disposed inside a ground wellhole for gas extraction of the mining-induced area and the ground wellhole dedicated protective pipe for gas extraction of a mining-induced area includes a casing and a chain that is disposed inside the casing and slidable relative to the casing, wherein the chain includes a plurality of chain drums and connecting pieces movably connecting the adjacent chain drums, and a plurality of air holes are opened in the chain drum along an axial direction of the chain drum.

Abstract: A rotary compressor: a casing; a plurality of bearings provided in an internal space of the casing; at least one cylinder provided between the bearings to form a compression space and has a vane slot; a rolling piston accommodated in the compression space to perform an orbiting movement; at least one vane that is slidably inserted into the vane slot of the cylinder, the at least one vane configured to separate the compression space into a suction chamber and a discharge chamber; a discharge cover including a noise reducing space to accommodate refrigerant discharged from the compression space; and a bypass flow path that allows the noise reducing space of the discharge cover to be connected between a sidewall of the vane slot and a side of the vane facing the sidewall.

Abstract: A rotor disk for an exhaust turbocharger is mounted in a housing of the exhaust turbocharger so as to be able to rotate about an axis of rotation. The rotor disk has a disk hub including a disk back and a disk front facing away from the disk back. A plurality of rotor disk blades are formed on the disk hub in a manner extending between the disk back and the disk front. A balancing mark is arranged in a blade channel formed between a first blade of the plurality of rotor disk blades and a second blade, arranged adjacent to the first blade, of the plurality of rotor disk blades. The balancing mark is triangle-like. The disclosure also relates to an exhaust turbocharger comprising such a rotor disk and to a method for balancing a rotor assembly for such an exhaust turbocharger.

Abstract: A gas turbine engine includes a compressor section and a compressor case with a low pressure compressor (LPC) and a high pressure compressor (HPC). The HPC is aft of the LPC. The compressor case defines a centerline axis. The compressor section also includes a rotor disk defined between the compressor case and the centerline axis. A plurality of stages are defined radially inward relative to the compressor case. The plurality of stages include at least one tandem blade stage. The tandem blade stage includes a plurality of blade pairs. Each blade pair is circumferentially spaced apart from the other blade pairs, and is operatively connected to the rotor disk. Each blade pair includes a forward blade and an aft blade. The aft blade is configured to further condition air flow with respect to the forward blade without an intervening stator vane stage shrouded cavity therebetween.

Abstract: An airfoil member having a root end, a tip end, a leading edge, and a trailing edge, the airfoil member including an upper skin; a lower skin; and a support network having a plurality of interconnected support members in a lattice arrangement and/or a reticulated arrangement, the support network being configured to provide tailored characteristics of the airfoil member. Also provided are methods and systems for repairing an airfoil member.

Abstract: A member may have a primary major surface and a secondary major surface. The member may form an array of apertures extending from the primary major surface to the secondary major surface. The array of apertures includes at least one aperture comprising two or more conduits. The axis of each conduit intersects the axis of each other conduit in the aperture. The cross-section of at least one of the conduits perpendicular to its axis may be circular. In some embodiments, an aperture may comprise two or three conduits.

Abstract: A component for a gas turbine engine includes a body portion that extends between a leading edge and a trailing edge of the component. The trailing edge includes a flared region and a non-flared region. At least one discharge slot is disposed at least partially within the flared region of the component.

Abstract: An integrally bladed rotor, including: a plurality of blades integrally formed with a hub as a single component, each of the plurality of blades having a blade body extending from the hub to an opposed blade tip surface along a longitudinal axis, wherein the blade body defines a pressure side and a suction side, and wherein the blade body includes a cutting edge defined between the blade tip surface of the blade body and the pressure side of the blade body, wherein the cutting edge is configured to abrade a seal section of an engine case.

Abstract: The invention relates to a reinforcement, containing fibers and resin, for an element made of a composite material, particularly a wind turbine blade, characterized in that the reinforcement is produced by stacking at least two parts produced by pultrusion. A reinforcement, containing fibers and resin, for an element made of a composite material, particularly a wind turbine blade, is characterized in that the reinforcement is produced by stacking at least two parts produced by pultrusion.

Abstract: The present invention provides a method for optimizing multi-stage components of large-scale high-speed rotary equipment based on Monte Carlo bias evaluation. The method comprises: obtaining an offset of a contact surface between all stages of rotors according to a multi-stage rotor propagation relationship, and calculating coaxiality according to a coaxiality formula; calculating a cross sectional moment of inertia of the contact surface, and obtaining a bending stiffness according to a bending stiffness formula; obtaining the amount of unbalance of a rotor according to a rotor error propagation relationship; and obtaining a probability relationship between the assembly surface runout of all stages of aero-engine rotors and the final geometric concentricity, the amount of unbalance and stiffness of multi-stage rotors by using a Monte Carlo method, and optimizing the tolerance distribution and bending stiffness of the aero-engine multi-stage rotors.

Abstract: A turbine housing defining a pair of volutes with respective outlets divided by a divider wall, includes a diffuser space in the gas flow path between the volutes and the turbine wheel. The diffuser space has an upstream portion having a smaller axial extent than a downstream portion of the diffuser space. The widening of the diffuser space tends to direct exhaust gas entering the diffusion space from at least one side of the divider wall towards the corresponding axial end of the diffuser space. Thus reduces the tendency of this gas to interrupt the flow into the diffuser space of exhaust gas from the other inlet volute.

Abstract: A method of layering ceramic matrix composite (CMC) plies during a build of a component is disclosed. The method may include creating a plurality of CMC plies for creating the component. At least a first plurality of the plurality of the CMC plies each define both an outer portion and an inner portion of the component, each inner portion being defined within the outer portion by one or more openings in the respective CMC ply. The method may also include layering the plurality of CMC plies, and infiltrating the CMC plies with a binder to form the component. In one example, the component can be a turbine nozzle endwall.

Abstract: A rim seal between a stator and a rotor in a gas turbine engine is described. The seal includes an axial overlap between platform rims of the stator and the rotor. The axial length of the platform rim of one of the stator and the rotor is accommodated within a radially aligned trench defined in the other of the stator and the rotor.

Abstract: A hydrostatic seal configured to be disposed between relatively rotatable components includes a base. The seal also includes a seal housing. The seal further includes a shoe operatively coupled to the base and extending axially from a forward end to an aft end. The seal yet further includes a plurality of teeth extending radially from a sealing surface of the shoe, one of the teeth being a longest tooth that extends furthest radially from the sealing surface, the axial distance from the forward end of the shoe to the longest tooth being greater than a radial distance from a radial tooth tip to the sealing surface.

Abstract: A hydrostatic seal configured to be disposed between relatively rotatable components. The seal includes a base. The seal also includes a seal housing. The seal further includes a shoe operatively coupled to the base and extending axially from a forward end to an aft end. The seal yet further includes a plurality of teeth extending radially from a sealing surface of the shoe, one of the teeth being a longest tooth that extends furthest radially from the sealing surface, the axial distance from the forward end of the shoe to the longest tooth being greater than a radial distance from a radial tooth tip to the sealing surface.

Abstract: Seal (10) for an inter-blade platform intended to extend circumferentially about an axis and to be mounted between two axial ends of the inter-blade platform, including a first part (10a) in contact with a first blade adjacent to a first circumferential end of the platform, and a second part (10b) in contact with a second blade adjacent to a second circumferential end of the platform, the first part (10a) and the second part (10b) of the seal (10) being fixed to each other such that a displacement in the circumferential direction of one of the two parts (10a, 10b) of the seal (10) causes a displacement of the other part (10a, 10b) of the seal (10) in the same direction, when the two parts (10a, 10b) of the seal (10) are fixed to each other.

Abstract: The present invention provides a deep learning regulation and control and assembly method and device for large-scale high-speed rotary equipment based on dynamic vibration response properties. The present invention starts from geometrical deviation of multiple stages of rotor/stator of an aircraft engine, amount of unbalance of rotor/stator, rigidity of rotor/stator and vibration amplitude of rotor/stator, considers the influence of the area of the assembly contact surface between two stages of rotors/stators, and sets the rotation speed of rotor/stator to be the climbing rotation speed to obtain vibration amplitude parameters.

Abstract: The invention relates to a tank (32) for liquid, in particular of a turbine engine such as an aircraft turbojet engine, the tank comprising an external wall (36) with an inner surface (48); an inner chamber intended for containing the liquid of the tank (32) and defined by the inner surface of the external wall; and a system (42) for measuring the level of liquid. The system comprises: a submersible portion matching the inner surface of the wall (36); a clearance (52) separating the submersible portion from the inner surface; and a liquid detector (54) configured to emit a signal towards the submersible portion through the clearance, said signal being configured to be modified in the event that liquid is present in the clearance (52). The invention likewise relates to a method for measuring a level of liquid, and an associated computer program.

Abstract: This disclosure relates to a buffer system for a gas turbine engine. An exemplary gas turbine engine includes, among other features, a buffer manifold in an intershaft region. The buffer manifold is configured to direct a flow of air between a first air seal and a first oil seal, and to direct another flow of air between a second air seal and a second oil seal.

Abstract: There is disclosed a rotor for a turbocharger, wherein the rotor has a rotor shaft, a carrier sleeve, a bearing collar and an oil diverting ring. The oil diverting ring is arranged on the carrier sleeve and is spaced apart from the rotor shaft in the radial direction by means of the carrier sleeve.

Abstract: A deflector for the fairing of a pinion, which includes a teething, a barrel and a wall positioned between the teething and the barrel, the deflector extending around an axis and including an envelope of which the shape and the dimensions are suited to surrounding at least one part of the teething of the pinion, the deflector including an oil injection circuit including a first portion provided on an outer surface of the envelope, a first injection hole provided in the envelope and communicating with the first portion of the oil injection circuit, the first injection hole emerging on an inner surface of the envelope so as to inject oil in the direction of the pinion, a second portion communicating with the first portion, the second portion including a second injection hole intended to be facing the inside of the barrel of the pinion.

Abstract: The present invention provides a method for distributing relative gap parameters of large-scale high-speed rotary equipment components based on eccentricity vector following measurement and adjustment.

Abstract: A mounting system for a gas turbine, includes two rails, on each rail a fastening portion for fastening the rail on a manhole of the gas turbine, and for each rail at least one displacement element, which can be displaced along the rail. With the aid of such a mounting system, maintenance tools and/or turbine components are straightforwardly passed through a manhole and displaced to their location of use.

Abstract: The invention relates to an exhaust gas turbine, comprising a turbine wheel (7) with a multiplicity of moving blades (8) and an exhaust-gas outlet duct (15), which is arranged downstream of the moving blades of the turbine wheel. The exhaust-gas outlet duct (15) is delimited radially on the outside by an axial turbine diffuser (1) and radially on the inside, at least partially, by a spinner (2). The axial turbine diffuser (1) is formed by a number N>1 of successive conical diffuser segments. An axial diffuser opening angle A between successive diffuser segments is A>1.0°. A ratio L/H between an axial diffuser segment length L and an entry height H of the exhaust-gas outlet duct (15) is L/H>0.01. A ratio H/S between the entry height H of the exhaust-gas outlet duct and a maximum radius S of the spinner (2) is H/S>1.0. The spinner (2) is formed by a number P>1 of successive conical spinner segments. An axial spinner opening angle B between successive spinner segments is B>1.0°.

Abstract: A drive assembly for a gas turbine engine according to an exemplary embodiment includes, among other things, an epicyclic gear train having an input and an output, the input coupled to a first turbine, the output coupled to an accessory drive shaft, and at least one engagement feature on a component of the gear train. An actuator is engageable with the at least one engagement feature to cause the accessory drive shaft to rotate. A method of driving a section of a gas turbine engine is also disclosed.

Abstract: A method for recovering heat from a flue gas from an engine and a heat recovery system are described. The method involves contacting coolant in a vaporization chamber with a plurality of flow-modifying structures. The structures are arranged in series in the direction of the flow of coolant liquid and are each configured for modifying the flow of the coolant liquid and the vapour in said vaporization chamber.

Abstract: A valve operating device, in particular for an internal combustion engine, has a camshaft, a cam unit mounted in an axially moveably manner on the camshaft, and an actuator unit which has an actuator for displacing the cam unit on the camshaft. The actuator is periodically mechanically forcibly decoupled during operation.

Abstract: A hydraulic camshaft adjuster adjusts the control time of gas exchange of an internal combustion engine. A reservoir for storing pressure medium is formed on a cover of the hydraulic camshaft adjuster. An overflow opening of the cover is dimensioned such that a volume of pressure medium remains in the reservoir when the hydraulic camshaft adjuster is stationary. This ensures that pressure medium is supplied to the return valve of a central locking mechanism when the engine is running.

Abstract: A breather device and a snow removal machine having the breather device have a casing into which blowby gas of an engine flows, an air suction port for letting out gas from the inside of the casing, and a gas-liquid separation mechanism for separating moisture contained in the blowby gas. The gas-liquid separation mechanism separates an inlet, which allows the blowby gas to flow in, and the air suction port by a predetermined distance, and has the air suction port positioned above a liquid path through which the moisture flows. A gas path allows the blowby gas to flow from the inlet to the air suction port without passing through an air cleaner element.

Abstract: An exhaust pipe with a double pipe structure that can reduce generation of a turbulent flow of exhaust gases is provided. In one aspect of the present disclosure, the exhaust pipe includes a double pipe and a retention member. The double pipe includes an inner pipe and an outer pipe. The retention member is disposed in a gap provided between an outer circumferential surface of the inner pipe and an inner circumferential surface of the outer pipe. The retention member is disposed at at least one end of the double pipe. At the end of the double pipe where the retention member is disposed, a radial clearance between the outer circumferential surface of the inner pipe and the inner circumferential surface of the outer pipe at an opening of the inner pipe is smaller than the radial clearance in an arrangement area where the retention member is disposed.

Abstract: An exhaust system for an internal combustion engine includes an oxidation catalytic converter unit (12) with a first catalytic converter housing with a first housing axis (A1). An SCR catalytic converter unit (18) has a second catalytic converter housing (20), with a second housing axis (A2). A mixer housing (16) has an upstream connection area (24) adjoining a downstream end (26) of the first catalytic converter housing (14) and has a downstream connection area (28) adjoining an upstream end (30) of the second catalytic converter housing. A mixer (48) is carried in the mixer housing. A reactant release device (56) at the mixer housing releases reactant into a reactant-receiving duct (72) of the mixer. The mixer housing includes a first housing part (36) forming the upstream connection area (24) and a second housing part (38) forming the downstream connection area together with the first housing part.

Abstract: Provided is a tail gas post-treatment mixing device (3), comprising a shell (31), a mixing tube (32) located inside the shell (31), and a partition plate (33) fixed at the periphery of the mixing tube (32), wherein the partition plate (33) separates the shell (31) into a first space used to be in communication with a first post-treatment carrier assembly and a second space used to be in communication with a second post-treatment carrier assembly; the partition plate (33) comprises a first plate sheet (331) located at one side of the mixing tube (32), a second plate sheet (332) located at the other side of the mixing tube (32), and a third plate sheet (333) connecting the first plate sheet and the second plate sheet, with the third plate sheet being provided with a through hole (334) for the mixing tube (32) to pass through; and the mixing tube (32) comprises a first tube part (321) located in the first space and a second tube part (322) located in the second space, and the first tube part is provided with at

Abstract: An exhaust gas treatment system for an internal combustion engine includes an exhaust gas pathway configured to receive exhaust from the engine, a diesel particulate filter (DPF) element positioned in the exhaust gas pathway to capture particulate matter from the exhaust, and a regenerator operable to increase a temperature of the exhaust that passes through the DPF element. The system also includes a controller configured to selectively operate the exhaust gas treatment system in a first mode in which the regenerator is inactive such that a temperature of the exhaust is within a first range, a second mode in which the regenerator is activated to increase the temperature of the exhaust to a first target temperature beyond the first range, and a third mode in which the regenerator is activated to increase the temperature of the exhaust to a second target temperature greater than the first temperature.

Abstract: An exhaust purification system of an internal combustion engine comprises a filter trapping particulate matter in exhaust gas, a differential pressure sensor detecting a differential pressure before and after the filter or a differential pressure between a pressure in the exhaust passage and an atmospheric pressure, a temperature sensor detecting a temperature of exhaust gas, and a deposition calculating part configured to calculate an amount of particulate matter deposited at the filter. The deposition calculating part is configured to calculate a first estimated value of an amount of the particulate matter based on the differential pressure, calculate a second estimated value of an amount of the particulate matter based on an amount of increase of temperature of the exhaust gas, and calculate an amount of the particulate matter based on the first estimated value and the second estimated value.

Abstract: A heat shield assembly is provided for shielding a wire harness that is associated with a sensor in communication with a heat source. The heat shield assembly includes a base plate having a primary aperture that is configured to allow passage of the wire harness therethrough. The primary aperture is disposed in alignment with a hole defined on a shroud of the heat source. The heat shield assembly also includes a pair of walls extending upwardly from a pair of opposite edges of the base plate. Further, the heat shield assembly also includes a pair of ledge members that extend laterally from a pair of first ends associated with the pair of walls. Furthermore, the heat shield assembly also includes a pair of thermal diverter plates that extend angularly from a pair of second ends associated with the pair of ledge members.

Abstract: A heat shield for shielding hot regions of a component is described. The component may be an exhaust manifold with a heat shield and also an internal combustion engine with an exhaust manifold or heat shield.

Abstract: An internal combustion engine exhaust system mixer includes a mixer body (12) with deflection elements (16) extending radially outwards from a mixer body center (14). A ring-shaped carrier area (22) adjoins the mixer body radially on the outside and encloses a mixer longitudinal axis. The carrier area includes a mixer connection area (24) for connecting the mixer (10) to an exhaust system component. A pipe connection wall (30) adjoins the mixer connection area and has a wall inner surface (32). A mixer body carrier wall (34) adjoins the mixer connection area, carries the mixer body, and is enclosed by the pipe connection wall. A first transition surface (40) adjoins the wall and is arched essentially continuously concavely between the wall inner surface and the wall outer surface, and axially defines a ring-shaped pipe-mounting intermediate space (38) between the pipe connection wall and the mixer body carrier wall.