Abstract: A downhole cleaning apparatus (10) comprising a tubular body (12). The tubular body (12) comprises comprising a plurality of openings (20) therethrough. Each opening (20) defines at least part of a helix extending longitudinally and circumferentially about the tubular body (12). The downhole cleaning apparatus (10) also includes a plurality of cleaning elements (22). Each cleaning element (22) is configured to extend through an opening (20) and to extend outwards from an outer surface of the tubular body (12). The cleaning elements (22) are distributed about the tubular body (12) and each cleaning element (22) defines at least part of a helix extending longitudinally and circumferentially about the tubular body. The openings (20) and the cleaning elements (22) are grouped to define a plurality of substantially continuous helical paths (18).

Abstract: An in-line treatment cartridge and methods of using same are disclosed. The in-line treatment cartridge can include a cylindrical body configured to allow fluid to flow therethrough and a plurality of particulates contained within the body. At least one particulate of the plurality of particulates can include a chemical treatment agent. The at least one chemical treatment agent can separate from the at least one particulate upon contact with a fluid.

Abstract: Aspects of the disclosure can relate to an adapter for power and communication connections between electronic devices in a drill string. In embodiments, the adapter can include a first terminal configured to couple with an output terminal of a first tool and a second terminal configured to couple with an input terminal of a second tool. The adapter can further include a power converter that adjusts a voltage received at the first terminal and supplies the adjusted voltage to the second terminal and a communications adapter that converts a signal format of a communications signal received at the first terminal to a second signal format for the second terminal.

Abstract: A centralized power system including at least one engine having a plurality of discharge connectors; a plurality of articulating power connectors, each articulating power connector comprising a first end connected to a corresponding discharge connector, and a second end connectable to at least one piece of oilfield equipment thereby supplying power from the at least one engine to the oilfield equipment.

Abstract: The present disclosure generally relates to a modular connection system for a top drive. The modular connection system may include two tubular components, each having a bore, a seal profile, and two or more load transfer features. The first tubular component may be inserted to the second tubular component to make a connection to transfer fluid, axial loads, and torsional loads. Each of the two tubular components may also include a coupler configured to transfer pressured fluid, data, or other signals.

Abstract: Embodiments disclosed prove a method for improving power usage for an oilfield operation. The method includes analyzing power usage for the oilfield operation, mapping power consumption for the oilfield operation; mapping power utilization for the oilfield operation; and improving power utilization for the oilfield operation.

Abstract: A screen system formed of a first screen sub and a second screen sub joined by a connector sub. The connector sub includes (i) a pipe coupling assembly connecting the base pipes of the first and second screen subs; (ii) a substantially impermeable shroud formed around the pipe coupling assembly and creating a connector annulus between the shroud and pipe coupling assembly; and (iii) end rings including a substantially annular flow passage connecting the first and second screen annuluses to the connector annulus.

Abstract: According to an aspect an initiator head assembly (10, 110) is provided having particular application with a perforating gun assembly, in particular for oil well drilling applications. The initiator head assembly includes a body (20, 120) and an electrical contact component (40, 140) with the electrical contact component embedded therein. In another aspect, the initiator head assembly with the embedded electrical contact component is configured as a unitary component and also to hold a pressure differential across the top and bottom parts of the initiator head assembly. In an aspect, the method of forming the initiator head assembly is also generally described.

Abstract: A closed loop pneumatic pumping system is provided. The system uses a gas compressor and a high pressure gas tank to exert pneumatic pressure against a reciprocating piston over a wellbore. The piston is connected to a rod string and downhole pump for pumping formation fluids from a wellbore. The system includes an electronic controller that controls movement, including pump speed of the piston as it cycles between upstrokes and downstrokes within a cylinder over the wellbore. In one aspect, speed is controlled by adjusting a speed of the compressor. In another aspect, speed is controlled by adjusting the position of an upstroke control valve and a downstroke control valve. In one aspect, the pump stroke controller is configured to adjust a speed of the upstroke and a speed of the downstroke in response to signals indicative of pump fillage. A method for optimizing pneumatic pumping speed at a wellbore is also provided herein.

Abstract: A method to dislodge debris from a pump system in which the pump system includes a down-hole pump coupled by a rod string to an above-ground pump actuator, which is coupled to a controller configured to operate the pump system. The method also includes determining that the pump system should begin operating in a pump clean mode, and implementing the pump clean mode configured in the controller. The method also includes impressing a preset vibration frequency during a portion of a pump stroke of at least one pump cycle. Further, the method calls for determining that the pump clean mode is complete, and returning the pump system to a normal operation mode.

Abstract: A fluid extraction system is presented. The fluid extraction system includes a direct current (DC) bus and a plurality of fluid extraction sub-systems configured to be electrically coupled to the DC-bus. At least one fluid extraction sub-system includes an electric machine configured to aid in the extraction of a fluid from a well. The electric machine includes a plurality of phase windings and a rotor. The at least one fluid extraction sub-system further includes a control sub-system to control a rotational speed of the rotor by selectively controlling a supply of a phase current to the plurality of phase windings such that the rotational speed of the rotor of the electric machine is different from rotational speed of a rotor of another electric machine in at least one of other fluid extraction sub-systems. Related method for controlling rotational speeds of electric machines is also presented.

Abstract: Systems and methods for variable rate steam injection, including via solar power for enhanced oil recovery, are disclosed. Several embodiments include using the variable nature of solar-generated steam to improve the efficiency and cost-effectiveness of enhanced oil recovery processes. In particular embodiments, the variable rate injection can provide more uniform steam distribution in an oil-bearing formation, at a lower cost than if the same amount of steam were provided on a continuous basis.

Abstract: A static gas separator interposed between an electric submersible pump and a downhole motor to separate entrained gas from production fluid in a subterranean well. The gas separator includes an elongate cylindrical mandrel concentrically surrounded an outer static filter sleeve. A base member is attached at a lower end of the gas separator and includes a flange for connection with a mating flange on the pump. The upper end of the gas separator includes a head member attached thereto and includes a flange for connection with a mating flange on the motor. The gas separator includes a plurality of radially aligned, axial flow intakes in fluid communication with a hollow interior of the head member and a separating annulus formed between the outer static filter sleeve and the mandrel. The gas separator may also include radially protruding helical fins or vanes that impart a centrifugal force or vortex to the production well fluid flowing through the annulus.

Abstract: A device for use in recovery of gas trapped by fluid and suspended solids in a gas or oil well includes a body defining a cavity with a cap at its upper end and an opening for entry of fluid at its bottom end. A lower valve controls fluid flow into, and an upper valve controls flow out of, the cavity. Pressurized gas pushes downward on fluid in the cavity in a compression stroke which closes the lower valve and opens the upper valve. Gas is exhausted from the cavity during an exhaust stroke. An effluent line allows exit of the fluid and suspended solids during the compression stroke. A probe line provides electrical power to a pair of probes for initiating and halting entry of the stream of pressurized gas into the cavity.

Abstract: One implementation of the disclosure provides a computer implemented method for underbalanced drilling. The implementation may include determining an initial 2D UBD operation envelope based on a set of initial operating points for a selected TVD or time, displaying the initial 2D UBD operation envelope on a computer display, providing at least one data point representing actual data from a well, determining at least one actual UBD operation point using the at least one data point and displaying it a on the computer display along with the 2D UBD operation envelope, selecting an optimization parameter, determining a set of optimized operating points based on the optimization parameter, and displaying the set of optimized operating points on the computer display along with the 2D UBD operation envelope.

Abstract: An apparatus, rock drilling rig and method for rock drilling includes a turning device for moving a drilling tool around longitudinal axis of the tool. The turning movement is controlled by an alternating turning system so that direction of turning movement is continuously reversed to first and second turning directions. The turning angle of the tool is restricted and a safety system (is configured to monitor the operation and to ensure that a predetermined turning angle is not exceeded.

Abstract: Methods and systems are described that can be used for locating conductive bodies such as wellbore casing or piping disposed below the earth's surface. An electrical current can be excited in a conductive body in each wellbore in a given area to produce a magnetic field, and the magnetic field can be detected by a ranging tool. Location and current parameters can be determined for an estimated number of wellbores producing non-negligible contributions to the magnetic field, and the estimated number of wellbores can be adjusted until the number of contributing wellbores is determined. Location solutions can be returned for each of the contributing wellbores, and the location solutions can be employed to facilitate exploration of drilling applications such as well avoidance, well intersection and/or steam assisted gravity drainage (SAGD) steering operations.

Abstract: Apparatus and methods for detecting subsurface tunnels employ an aboveground air pressure sensor and one or more subsurface air pressure sensors. The output of the aboveground sensor forms the input to a numerical model whose input parameters account for the effects of depth and permeability and porosity of the earth on the propagation of pressure variations from the surface to the location of each subsurface sensor. Tunnels are detected on the basis of a growing deviation between measured and modeled subsurface pressures using static model input parameters, or on the basis of changes in the model input parameters required to continue accurately approximating measured subsurface pressures, or on the basis of spatially anomalous values of the model input parameters corresponding to multiple horizontally separated subsurface sensors.

Abstract: Methods and apparatus are provided for sensing a cavitation-related event in an artificial lift system for hydrocarbon production and operating the system based on the sensed event. One example method of operating an artificial lift system for a wellbore generally includes monitoring the wellbore for an indication (e.g., an acoustic or vibrational indication) of an event associated with cavitation in the artificial lift system and adjusting at least one parameter of the artificial lift system if the event is detected. One example system for hydrocarbon production generally includes an artificial lift system for a wellbore and at least one sensor configured to detect an indication of an event associated with cavitation in the artificial lift system.

Abstract: The invention relates to a telemetry system for use in a pipe having a wall, comprising a transmitter adapted to generate at least one acoustic wave in a frequency range of about 50-300 kHz, and to inject the acoustic wave in the wall of the pipe, wherein the transmitter is further arranged to binary code information conceived to be transmitted with the acoustic wave. The invention further relates to a pipe comprising the telemetry system, and to a method of transmitting information via a pipe.

Abstract: The present disclosure relates generally to data communication in subsea oil and gas drilling and production operations. In particular, data communication from sensors located on a piece of subsea oil and gas drilling and/or production equipment to a remote location, such as to a demodulation system, is disclosed. The data communication system can include sensors for measuring various characteristics of the subsea equipment, for coding the measured data into a signal, for transmitting the signal, and for ultimately decoding the signal. The signal is transmitted along the structures which provide the containment for existing hydraulic fluid lines associated with the subsea equipment by a variety of methods, such as by pulse position modulation and/or reverse time pulse position modulation. The communication system can further include a local power generator assembly to power associated sensors and transmitters.

Abstract: Exemplary embodiments of rotary pulsers are provided that include a stator and a rotor rotationally disposed adjacent to the stator. The rotary pulsers can include a regulator mechanism and a pump. Based on a parameter or condition associated with the rotary pulser, the regulator mechanism can adjust a parameter of the pump to control rotation of the rotor. Exemplary embodiments are also directed to methods of regulating a rotary pulser.

Abstract: A well-bore monitoring process involving logging the temperature of a soil, rock, and brine mixture present in a carbonate formation continuously, and simultaneously logging the resistivity of the soil, rock, and brine mixture in the carbonate formation continuously. The logged temperature and the logged resistivity are interpreted whereby concurrent events in the logged temperature and the logged resistivity identify dissolution of rock into the mixture and precipitation of scale from the mixture. The simultaneous logging of the temperature and the resistivity is conducted in a well-bore in the carbonate rock formation.

Abstract: A method for downhole formation evaluation includes extracting a fluid sample from a drilling fluid using a controlled gas separator. The evaluation further includes extracting a plurality of individual chemical species from the fluid sample, wherein the individual chemical species include methane, ethane, propane, and CO2 and identifying isotope concentrations in each of the individual chemical species. Identified isotope concentrations in each of the individual chemical species are output for a first time period.

Abstract: Apparatus and methods for assessing contamination of formation fluid. A downhole sampling tool is operated to draw fluid from a subterranean formation into a chamber of the downhole sampling tool. The downhole sampling tool is then operated to discharge the fluid from the chamber while monitoring pressure of the fluid and volume of the chamber. Contamination of the discharged fluid is assessed based on the monitored fluid pressure and the monitored chamber volume.

Abstract: Methods and apparatus are provided for the measurement of the compressibility of reservoir fluid. A piezoelectric material is coupled to a wall of a fluid chamber. Compressibility is derived from measured pressure changes to the fluid resulting from volumetric changes to the fluid chamber imposed by the mechanical strain of the piezoelectric material resulting from an applied electric field.

Abstract: A system for guiding movement of a chassis of a mining machine along a rack includes a shoe and a fluid line for receiving fluid from a fluid source. The shoe is configured to be coupled to the chassis and slidably engage the rack. The shoe is configured to extend at least partially around the rack. The shoe includes a first end, a second end, an inner surface, and an outer surface. At least a portion of the inner surface is configured to be positioned adjacent the rack. The fluid line includes an outlet positioned proximate the shoe for dispensing the fluid at an interface between the shoe and the rack.

Abstract: The present invention relates to a shank chisel with a chisel head and a chisel shank, wherein the chisel shank has a securing element receptacle in which a securing element is arranged. In order to be able to make simple installation of the shank chisel in a chisel holder possible in a safe and maintenance-optimized manner of operation, it is provided according to the invention that a clamping element is adjustable relative to the chisel shank in such a manner that at least one part of the outer contour of the securing element is changed. The invention furthermore relates to a corresponding fixing assembly for a shank chisel in a chisel holder.

Abstract: A device usable as an impeller has a plurality of vanes rotating eccentrically about a shaft. Eccentric rotation is enabled by a cam mounted on the shaft. The vanes are received within slots in a rotor which surrounds the shaft and rotates about an axis coaxial with the shaft. The rotor rotates within a housing having a cylindrical surface facing the rotor. The surface is eccentric to the shaft. The vanes execute reciprocal motion upon rotation of the rotor. The vane motion is constrained so that the edges of the vanes remain proximate to the cylindrical surface during rotation.

Abstract: Techniques involve a motor assembly including a rotor and a stator. The stator includes a contact surface for contacting an outer surface of the rotor. The contact surface includes a rigid material. The motor assembly also includes at least one constraint disposed along a length of the motor assembly, where the constraint constrains a radial and/or tangential movement of the rotor relative to the stator. The at least one constraint may be disposed at one or more proximate ends of the motor assembly, and/or along the length of the motor assembly. The contact surface of the stator may have a profile including peaks and valleys, and in some embodiments, the contact surface may be treated to reduce friction and/or wear.

Abstract: An axial turbo machine includes: a plurality of blades that constitutes a moving blade row or a stationary blade row; an end wall 1 to which the plurality of blades is fixed and which forms a channel of a fluid together with the blades; and at least one concave portion that is locally formed in a region located between the adjacent blades or on the upstream side of a front edge of the blade on a surface of the end wall and that controls a secondary flow of the fluid.

Abstract: The present invention generally relates to rotary turbomachinery methods and integrated processes requiring high-energy efficiency. In one embodiment, the present invention relates to rim-rotor configurations enabling long-term survival under conditions of either high temperature or oxidation resistance or saturated fluid abrasion.

Abstract: A method of balancing turbocharger rotating assembly (50) includes installing a shaft-and-turbine wheel sub-assembly (40) into a ball bearing cartridge (20) within a bearing housing (8) of a turbocharger (1), connecting a compressor wheel (5) to the shaft (6), and testing the balance of the turbocharger rotating assembly (50) while the turbocharger rotating assembly (50) is installed within the bearing housing (8) of the turbocharger (1). Based on the results of the balance testing, material is removed from the turbine wheel (4) while the shaft-and-turbine wheel sub-assembly (40) is installed within the bearing housing (8) of the turbocharger (1). The step of removing the material from the turbine wheel (4) comprises removing material from a peripheral edge (35) of a backwall (34) of the turbine wheel (4).

Abstract: A method of balancing a gas turbine engine rotor comprises the step of obtaining a rotor disc with a circumferential array of balance tabs projecting from a peripheral rim of the disc. Stress shielding scallops are defined in the rotor disc between the tabs. The balancing is achieved by removing material from at least one of the tabs.

Abstract: A method of producing a turbine rotor, in particular a steam turbine rotor, is provided. A forged and machined existing steam turbine rotor having partially larger dimensions as dimensions of an intended rotor is provided. The form of the existing rotor is compared with the form of the intended rotor and a position of the intended rotor within the existing rotor is chosen. Material is applied by build-up welding on portions of the existing rotor where not enough material is present for machining the intended rotor at the chosen position. The intended rotor is produced at the chosen position by machining the existing rotor.

Abstract: The present application provides a purge flow delivery system that may be used with a gas turbine engine. The purge flow delivery system may include a mixing chamber with a first sidewall, a second sidewall, and a cover plate, a first inlet tube positioned about the first sidewall, the first inlet tube configured to deliver a first fluid to the mixing chamber, a second inlet tube positioned about the second sidewall, the second inlet tube configured to deliver a second fluid to the mixing chamber, and a baffle plate attached to the cover plate and positioned to direct the first fluid at a first angle and the second fluid at a second angle.

Abstract: The present application thus provides a method for reducing stress on at least one of a turbine disk and a turbine blade. The method may include the steps of (a) determining a starting line for a dovetail backcut relative to a datum line, (b) determining a cut angle for the dovetail backcut, and (c) removing material from at least one of the blade dovetail or the disk dovetail slot according to the starting line and the cut angle to form the dovetail backcut. The datum line may be positioned about 2.866 inches (about 72.796 millimeters) from a forward face of the blade dovetail and wherein step (a) is practiced such that for the pressure side of the dovetail, the starting line of the dovetail backcut is at least about 2.566 inches (about 65.176 millimeters) in a forward direction from the datum line.

Abstract: A nozzle module for an energy converter, in particular for a power plant, including a first nozzle for the introduction of a motive fluid into a mixing chamber and an introduction opening for the introduction of a suction fluid into the mixing chamber, the mixing chamber having a geometry for merging the motive fluid and the suction fluid in the mixing chamber in a flow-intensifying manner. To specify a nozzle module which effects an increase in efficiency of the power plant, a vapor pressure of the motive fluid upstream of the first nozzle is lower than a vapor pressure of the suction fluid upstream of the introduction opening, and a gas pressure in the mixing chamber in a region downstream of the first nozzle is lower than a gas pressure in the mixing chamber in a region downstream of the introduction opening.

Abstract: A support device supports an inner member of a fixed body including the inner member and an outer member, the inner member being arranged around a rotating body and divided into upper and lower sections and the outer member being arranged in at least a part around the inner member and divided into upper and lower sections.

Abstract: A sector for a turbine stator includes vanes made of composite material, each including an airfoil extending between first and second ends. The sector has first and second platforms made of composite material, the first platform having openings in which the first ends of the vanes are engaged, and the second platform having openings in which the second ends of the vanes are engaged. The openings in the first platform present dimensions greater than the dimensions of the first ends of the vanes engaged in the openings so as to leave clearance between the first end of each vane and the opening. Each vane first end engaged in an opening presents dimensions that are less than the dimensions of the airfoil so as to define a shoulder extending around the first end. The shoulder presents dimensions that are greater than the dimensions of the openings in the first platform.

Abstract: In one aspect, the present subject matter is directed to a gas turbine sealing assembly that includes a first static gas turbine wall and a second static gas turbine wall. A seal is disposed between the first static gas turbine wall and the second static gas turbine wall. The seal includes a first seal layer defining a first seal layer aperture extending therethrough. A second seal layer defines an elongated slot extending therethrough. The elongated slot includes a first end and a second end. A third seal layer defines a third seal layer aperture extending therethrough. The second seal layer is positioned between the first seal layer and the third seal layer such that the first seal layer aperture is in fluid communication with the first end and the third seal layer aperture is in fluid communication with the second end.

Abstract: A gas turbine engine includes a conduit that is configured to direct a fluid to at least one manifold that is adjacent to a turbine section. A first intake is in fluid communication with the conduit. A second intake is in fluid communication with the conduit. A valve is configured to selectively direct a fluid from at least one of the first intake and the second intake.

Abstract: An oil film damper of a bearing structure is located between facing surfaces of two bearings. The oil film damper includes two protrusions protruding inward in a radial direction from an inner circumferential surface of a main body portion, an oil guiding passage penetrating through from the protrusion to an outer circumferential surface of the main body portion and guiding a lubricating oil from the outer circumference of the main body portion to the bearing, an inclined surface provided on a side opposite to the adjacent surface adjacent to the bearing in the protrusion and having an inner diameter gradually increasing as the diameter is separate from the adjacent surface in the rotation axis direction of the shaft, and an oil discharge hole provided between the two protrusions of the main body portion and discharging the lubricating oil to an outside from an inside of the main body portion.

Abstract: A turbocharger includes: a bearing portion which is provided in a turbine housing; a shaft rotatably inserted into a bearing hole of the bearing portion; an attaching member fixed to the shaft; and a valve coupled to the shaft via the attaching member and configured to open and close a flow path opened to an internal space along with rotation of the shaft. The attaching member includes: a base portion provided with an insertion hole of the shaft; and an extension portion integrally formed with the base portion and extending from the base portion in a radial direction of the shaft to thereby hold the valve. The base portion is provided at least at a part of a range of the shaft in a circumferential direction of the shaft, and protrudes more in the radial direction of the shaft than the bearing portion.

Abstract: A turbocharger includes: a turbine housing including an internal space formed therein; a bearing portion provided in the turbine housing; a shaft rotatably inserted into a bearing hole in a state where at least one end protrudes more to an inside of the turbine housing than the bearing portion; and a valve fixed to the shaft and configured to open and close a flow path opened to the internal space. The bearing portion includes a protrusion portion which protrudes from an inner wall of the turbine housing. The radial hole of the protrusion portion penetrates the bearing portion in a radial direction of the shaft, from the outer circumferential surface of the bearing portion to the bearing hole.

Abstract: A method for forming a gas turbine engine component comprises the steps of forming a first portion from a high temperature alloy material, and forming a second portion from the high temperature alloy material, the first and second portions each defining an external surface and an internal surface. At least one heat transfer feature is formed directly on the internal surface of at least one of the first and second portions. The first and second portions are attached together to form a component. A component for a gas turbine engine is also disclosed.

Abstract: The liquid cooling system has a heat exchanger having a fluid inlet and an outlet; a fluid supply conduit leading to the inlet of the heat exchanger; a fluid return conduit extending from the outlet of the heat exchanger; a bypass conduit extending between the fluid supply conduit and the fluid return conduit; a thermal valve configured for selectively closing the bypass conduit, the valve having a temperature sensing element positioned downstream of both the heat exchanger and the bypass conduit, the temperature sensing element configured to selectively move the thermal valve in response to a temperature change of the liquid which the temperature sensing element is exposed to relative to a temperature threshold of the valve; and a deflector positioned between the temperature sensing element and at least one of the bypass conduit and the heat exchanger outlet.

Abstract: A shim assembly includes a shim having a first side and a second side, at least one of the first side and the second side being oriented to form a wedge-shaped shim. Also included is a threaded fastener operatively coupled to the shim and configured to translate the shim in a direction parallel to a longitudinal direction of the threaded fastener.

Abstract: A bearing housing of an exhaust gas turbocharger may include an encircling and inwardly open groove arranged in the bearing housing. The bearing housing may also include a housing cover that may have at least one forming portion formed plastically into the groove. The housing cover may be secured on the bearing housing via the at least one forming portion.

Abstract: The present disclosure relates to a device (30) for positioning an inspection tool (130) relative to a flange (10) of a casing (1). The device (30) comprises first and second positioning parts (40, 70) that are assembled together. The first part (40) has a fastener portion (45) suitable for being fastened to the flange (10). The second part (70) includes a hole (75) defining a reference axis (X) for positioning the inspection tool (130); and a positioning surface (85) suitable for co-operating with a circumferential surface (12) of the flange (10) so as to position the reference axis (X) so as to intersect an axis of revolution (Z) of the flange (10). The first and second parts (40, 70) include respective setting surfaces (50, 80) suitable for co-operating together while positioning the reference axis (X) perpendicularly to the axis of revolution (Z).