Abstract: A subsea electrical unit is provided. The subsea electrical unit includes a first electric power connection for receiving electric power for operating the subsea electrical unit and a second electric power connection towards a further subsea electrical unit. A line insulation monitor is coupled to the second electric power connection. A control unit is adapted to determine whether electric power is present on the second electric power connection, and is further adapted to disconnect the line insulation monitor form the second electric power connection if it determines that power is present on the second electric power connection.

Abstract: An electrical generator positionable downhole in a well bore includes a tubular housing having a first longitudinal end and a second longitudinal end, the housing having an internal passageway with a plurality of layers. The layers comprise at least a first protective layer, a second protective layer, and an electrically conductive layer positioned between the first and second protective layers. The layers define an internal cavity. A shaft with magnetic inserts is movably positioned in the internal cavity. Electrical current is generated when the shaft is moved. Alternatively, the device may be supplied with electrical power and used as a downhole motor.

Abstract: Aspects of the disclosure can relate to a system including a rotatable input shaft and an output shaft to be rotationally driven by the input shaft. The system can also include a coupling that couples the input shaft to the output shaft. The coupling can transmit a predefined torque before slipping. The system can further include an electrical generator coupled with the output shaft. The electrical generator can be electrically connected to a primary electrical load and a secondary electrical load, where the secondary electrical load is adjustable to maintain the torque transmitted by the coupling approximately at the predefined torque after the coupling slips.

Abstract: The invention discloses a method for surface enhancement of a pipe. The method includes the steps of: introducing the pipe in a wellbore; introducing cement slurry in the pipe from surface; introducing an expander cone in the pipe on top of the cement slurry, the expander cone having a largest outer diameter which is larger than the initial inner diameter of the pipe; pumping the expander cone towards the downhole end of the pipe, thereby moving the cement slurry to the downhole end and out of the downhole end and into an annulus enclosing the pipe, while and at the same time expanding the inner diameter of the pipe.

Abstract: The present invention relates to a downhole expandable tubular to be expanded in a well downhole from a first outer diameter to a second outer diameter to abut against an inner face of a casing or borehole, the downhole expandable tubular having an axial extension, wherein the downhole expandable tubular is made of metal and is machined from one metal tubular blank, providing the downhole expandable tubular with at least one circumferential projection. Furthermore, the present invention relates to an annular barrier, to a downhole completion comprising a downhole expandable tubular according to the present invention, to a downhole completion comprising a well tubular structure and an annular barrier according to the present invention and to a manufacturing method for the manufacture of the downhole expandable tubular according to the present invention.

Abstract: There is provided a perforating tool comprising a housing, an inlet defined within the housing, a perforator fluid passage defined within the housing, and disposed in fluid communication with the inlet, and a nozzle, press-fit into the housing, and disposed in fluid communication with the perforator fluid passage.

Abstract: A method of optimizing the operation of a gas lift well. The method includes the steps of: collecting data from at least one surface mounted sensor, the at least one surface mounted sensor including a skin-mounted temperature sensor, the at least one surface mounted sensor mounted to the gas lift well's surface equipment; collecting ambient temperature data; and determining gas lift performance from data so obtained. A system and field test kits for optimizing the operation of a gas lift well are also provided.

Abstract: A method of Enhanced Oil Recovery from oil zones in a subterranean geological formation, and from oil zones, the method comprising: a first injecting step of injecting a first composition comprising CO2 into the subterranean geological formation for a period of time; a second injecting step of injecting a second composition comprising CO2 and a hydrocarbon into the subterranean geological formation for a period of time, wherein the first composition and the second composition are different; and extracting oil from the subterranean geological formation.

Abstract: Extracting of Heavy Oil (Hydrocarbon) from Tar Sand and Oil Shale in deep reservoirs 7,000-12,000 feet below the ground surface by using Circular Waveguides Technology and Microwave Energy High Power System. Using Circular Waveguides as microwave energy radiator connects to the Microwave High Power System is the most practical method and provides a relatively cost-effective means of extract heavy oil from target Tar Sand or Oil Shale in deep reservoirs. This invention method can be applied for future new well bores that are in the plan to be drilled. It also can be used for existing un-use well bores that are being closed; waiting for cleaner new enhance oil recovery technology becoming available in order to reclaim of heavy oil without damaging the environment.

Abstract: Electrical down-hole heating devices help enhance the recovery of thick waxy oil, heavy oil, bitumen, natural gas, hydrocarbons, and related commodities by lowering the viscosity and raising the pressures of the surrounding fluid and gas. In addition, the use of the more energy efficient electrical heat can help reduce the amount, and in some cases eliminate the use altogether, of less energy efficient steam to heat the oil. The higher power density superconducting down-hole heating system can enable the in-situ generation of steam down-hole within the confines of the well-bore. The in-situ generation of steam with this device has multiple benefits including reductions in capital costs of the above ground steam plant, increased energy efficiency, reduced greenhouse gas emission, and minimizing water usage and its corresponding reclamation costs. Common types of electrical down-hole heaters include: a) radiative type, b) inductive type, or c) resistive type.

Abstract: Methods and apparatuses for hydraulically fracturing a subterranean wellbore while drilling and/or tripping are disclosed. A method for hydraulically fracturing a subterranean formation may include rotating a drill string to drill the wellbore and hydraulically fracturing the subterranean formation at a plurality of axially spaced locations along the wellbore while tripping the drill string out of the wellbore. The drill string may include a hydraulic fracturing assembly. The hydraulic fracturing operation may include translating the drill string in an uphole direction so that a set of frac ports in the hydraulic fracturing assembly is adjacent a region of the formation selected for fracturing, expanding at least one pair of packers to seal an annular region of the wellbore exterior to the frac ports, and pumping fracturing fluid downhole through the frac ports to hydraulically fracture the subterranean formation.

Abstract: A method for fracturing a hydrocarbon-containing formation includes running a tubing string into an open hole and uncased, non-vertical section of the wellbore, and expanding first, second, and third solid body packers until each sets and seals against the wellbore wall. The method also includes applying a first pressure within the tubing string inner bore such that the hydraulically actuated sliding sleeve moves from a closed port position to an open port position without engaging any fluid conveyed sealing device. The method also includes conveying a sealing device through the tubing string, passing through a first sliding sleeve and landing in and sealing against a second sliding sleeve's seat moving the second sliding sleeve to an open port position permitting fluid flow through a second port. And the method includes pumping fracturing fluid through the second port and into an annular wellbore segment to fracture the hydrocarbon-containing formation.

Abstract: A low-polymer-load fracturing fluid may include an aqueous carrier fluid, proppant, and polymer-treated degradable fibers. The polymer-treated degradable fibers may include degradable fibers that have been at least partially treated with a crosslinkable, hydratable polymer. In some instances, a method may involve placing a low-polymer-load fracturing fluid having an initial viscosity into a subterranean formation penetrated by a wellbore at a rate to generate pressure above fracture gradient to form or enhance at least one fracture in the formation matrix surrounding a designated portion of the wellbore; placing the low-polymer-load fracturing fluid into the fracture and allowing the polymer to crosslink and increase the initial viscosity to a gelled viscosity; and allowing the polymer-treated degradable fibers to degrade and reduce the gelled viscosity to a broken viscosity.

Abstract: A method of extracting hydrocarbon-containing organic matter from a hydrocarbon-containing material includes the steps of providing a first liquid comprising a turpentine liquid; contacting the hydrocarbon-containing material with the turpentine liquid to form an extraction mixture; extracting the hydrocarbon material into the turpentine liquid; and separating the extracted hydrocarbon material from a residual material not extracted.

Abstract: An oil recovery process includes recovering an oil-water mixture from an oil-bearing formation and separating the produced water from the oil-water mixture. The produced water includes dissolved gases and the method includes heating and pressurizing the produced water. After the produced water is heated and pressurized, it is flash vaporized through a lesser pressure which produces a vapor and residual produced water. The flash vaporization of the produced water evaporates dissolved gases and the dissolved gases are vented away with the vapor.

Abstract: A system for drilling a borehole according to the present invention includes a drill rig and a control system. The drill rig includes a drill, an air injection system and a water injection system. The control system, which is operatively associates with the drill rig, receives information from the drill rig that relates to at least one drill parameter. The control system processes information relating to the drill parameter, determines whether the drill parameter is within a predetermined specification for the monitored drill parameter, chooses a hole defect mitigation routine based on the monitored drill parameter when the monitored drill parameter is outside the predetermined specification, and controls the drill rig to implement the chosen hole defect mitigation routine.

Abstract: A well advisor system and console for monitoring and managing well drilling and production operations. The system may be accessed through one or more workstations, or other computing devices, which may be located at a well site or remotely. The system is in communication with and receives input from various sensors. It collects real-time sensor data sampled during operations at the well site. The system processes the data, and provides nearly instantaneous numerical and visual feedback through a variety of graphical user interfaces (“GUIs”), which are presented in the form of an operation-specific console. The input and data provides information related to rate of penetration concerning a well being drilled, and present the information for related parameters in real time against a plotted “fairway” of determined maximum and minimum values, with a focus on the safety of the drilling operation.

Abstract: A well advisor system and console for monitoring and managing drilling operations at a well site. The system may be accessed through one or more workstations, or other computing devices, which may be located at a well site or remotely. The system is in communication with and receives input from various sensors. It collects real-time sensor data sampled during operations at the well site. The system processes the data, and provides nearly instantaneous numerical and visual feedback through a variety of graphical user interfaces (“GUIs”), which are presented in the form of an operation-specific console. The input and data provides information related to drilling operations at a well site, including, but not limited to, hole cleaning status and wellbore stability.

Abstract: A well advisor system and console for monitoring and managing tubular tripping operations at a well site. The system may be accessed through one or more workstations, or other computing devices, which may be located at a well site or remotely. The system is in communication with and receives input from various sensors. It collects real-time sensor data sampled during operations at the well site. The system processes the data, and provides nearly instantaneous numerical and visual feedback through a variety of graphical user interfaces (“GUIs”), which are presented in the form of an operation-specific console. The input and data provides information related to tubular tripping operations at a well site.

Abstract: A method for determining a stimulated rock volume includes determining a position of a plurality of seismic events from seismic signals recorded in response to pumping fracturing fluid into a formation penetrated by a wellbore. The signals generated by recording output of a plurality of seismic receivers disposed proximate a volume of the Earth's subsurface to be evaluated. A source mechanism of each seismic event is determined and is used to determine a fracture volume and orientation of a fracture associated with each seismic event. A volume of each fracture, beginning with fractures closest to a wellbore in which the fracturing fluid was pumped is subtracted from a total volume of proppant pumped with the fracture fluid until all proppant volume is associated with fractures. A stimulated rock volume is determined from the total volume of fractures associated with the volume of proppant pumped.

Abstract: Various methods for detecting and accounting for the effects of half-stroking by a pump are provided. In one embodiment, a method includes operating a pump of a downhole tool to pump fluid from a formation through the downhole tool and determining pressure differentials between a formation pressure and pressure of the fluid within the downhole tool. The pressure differentials for each of a forward stroke and reverse stroke of the pump can be summed and then compared to enable identification of onset of half-stroking by the pump. Additional systems, devices, and methods are also disclosed.

Abstract: Systems and methods identify and/or detect one or more features of a well casing by utilizing one or more downhole measurements obtainable by a downhole component. The one or more features of the well casing are identifiable and/or detectable from the one or more measurements associated with one or more properties of the one or more features of the well casing.

Abstract: A method of treating a subsurface formation includes circulating at least one molten salt through at least one conduit of a conduit-in-conduit heater located in the formation to heat hydrocarbons in the formation to at least a mobilization temperature of the hydrocarbons. At least some of the hydrocarbons are produced from the formation. An electrical resistance of at least one of the conduits of the conduit-in-conduit heater is assessed to assess a presence of a leak in at least one of the conduits.

Abstract: A wireless communications system for a downhole drilling operation comprises surface communications equipment and a downhole telemetry tool. The surface communications equipment comprises a surface EM communications module with an EM downlink transmitter configured to transmit an EM downlink transmission at a frequency between 0.01 Hz and 0.1 Hz. The downhole telemetry tool is mountable to a drill string and has a downhole electromagnetic (EM) communications unit with an EM downlink receiver configured to receive the EM downlink transmission. The downhole EM communications unit can further comprise an EM uplink transmitter configured to transmit an EM uplink transmission at a frequency greater than 0.5 Hz, in which case the surface EM communications module further comprises an EM uplink receiver configured to receive the FIG. 1 EM uplink transmission.

Abstract: A system and method of applying periodic energy pulses to a portion of a wellbore, fracture(s), and/or near wellbore to interrogate and/or stimulate at least a portion of the wellbore, fracture(s), and/or near wellbore. The system includes a downhole device that is configured to deliver periodic energy pulses to a portion of the wellbore. The downhole device may deliver various energy pulses such as pressure waves, seismic waves, and/or acoustic waves. Sensors may determine properties of a portion of the wellbore and/or fracture based on energy pulses detected within the wellbore. The sensors may be connected to the downhole tool, may be positioned within the wellbore, and/or may be positioned at the surface. The magnitude and/or frequency of the periodic energy pulses may be varied to change the stimulation and/or interrogation of the wellbore.

Abstract: A downhole formation testing and sampling apparatus. The apparatus includes a setting assembly and an actuation module that is operable to apply an axial compressive force to the setting assembly shifting the setting assembly from a radially contracted running configuration to a radially expanded deployed configuration. A plurality of probes is coupled to the setting assembly. Each probe has a sealing pad with an outer surface operable to seal a region along a surface of the formation to establish the hydraulic connection therewith when the setting assembly is operated from the running configuration to the deployed configuration. Each sealing pad has at least one opening establishing fluid communication between the formation and the interior of the apparatus. In addition, each sealing pad has at least one recess operable to establish fluid flow from the formation to the at least one opening.

Abstract: A method of moving a component or a material to and within a level of a shaft boring system. The shaft boring system is positioned within a shaft and the method comprises lowering the component or the material inside a cage into the shaft and to a level of the shaft boring system. The method further comprises suspending the component or the material from a transport system within the level of the shaft boring system. In addition, the method comprises moving the component or the material within the level of the shaft boring system using the transport system. The component is a component of the shaft boring system and the material is a material for forming the shaft boring system.

Abstract: The invention relates to a protective element for connecting to a concrete element (10) of a tunnel lining and having at least one protective portion (21, 22, 23) which has a side which faces the concrete element (10) and on which is provided at least one connecting element (24, 25, 26, 27, 28) for producing a durable connection of the protective portion (21, 22, 23) to the concrete element (10), wherein the protective portion (21, 22, 23) has a base portion (21) and/or a wall portion (22, 23) and at least one region consisting of at least one plastics material, and the protective element has at least one seal (30) which is connected in a single piece to the protective portion (21, 22, 23), wherein the connection is gas-tight and liquid-tight, and the single-piece connection of the seal to the protective portion is produced by injection moulding with the at least one plastics material and thereby forms a first portion of the base portion (21) and/or of the wall portion (22, 23) of the protective portion (21,

Abstract: A method for repairing a blade row, wherein the blades have cover plates and a disruptive gap has occurred between the cover plates, wherein in a first method step, a bracing element is arranged in the gap between the cover plates and, in a second method step, the element and the plates are welded together.

Abstract: A turbine wheel (1) of an exhaust-gas turbocharger (2), formed from a titanium aluminide material, having a wheel back (7) which is of closed configuration as viewed from an axial direction (A) and which has an outer contour (17), a hub (3) which extends from the wheel back (7) and which tapers along the axial direction (A), and a multiplicity of turbine blades (4) which extend from the wheel back (7) and from the hub (3) and which blades extend outward in a radial direction (R), as far as a connection region outer diameter (DAB) at least in a connection region (5). The wheel back (7) has, in an outer region (11) adjoining the connection region (5), a wheel back outer diameter (DRR) which is greater than or equal to the connection region outer diameter (DAB).

Abstract: A rotor assembly for a gas turbine engine includes a rotor defining an outer periphery; and a plurality of blades attached to the outer periphery. The plurality of blades includes a material property different than the other of the plurality of blades to provide mistuning of the rotor.

Abstract: A manufacturing method includes forming one or more grooves in a component that comprises a substrate with an outer surface. The substrate has at least one interior space. Each groove extends at least partially along the substrate and has a base and a top. The manufacturing method further includes applying a structural coating on at least a portion of the substrate and processing at least a portion of the surface of the structural coating so as to plastically deform the structural coating at least in the vicinity of the top of a respective groove, such that a gap across the top of the groove is reduced. A component is also disclosed and includes a structural coating disposed on at least a portion of a substrate, where the surface of the structural coating is faceted in the vicinity of the respective groove.

Abstract: A method of forming a component for use in a gas turbine engine includes the steps of forming an airfoil/root assembly; creating a platform assembly structure having an opening; inserting the airfoil/root assembly into the opening; and bonding the platform assembly structure to the airfoil/root assembly to form the component.

Abstract: A locking device for use in a rotor blade, said locking device comprising: a locking member that is arranged to be movable from an unlocked position to a locking position upon experiencing sufficiently fast rotation; and a selectively engagable retaining device arranged when engaged to retain the locking member in the unlocked position. The locking device will typically default to an unlocked position during normal rotation and will only be locked so as to prevent movement when the retaining device is de-activated. A method of locking an actuator is also disclosed. The locking device has applications in helicopter rotor blades and wind turbine blades amongst others.

Abstract: An airfoil component for a gas turbine engine includes a platform. The airfoil component includes a flow path surface from which an airfoil extends. A laterally extending aft surface is adjacent to the flow path surface. A contoured surface adjoins the flow path surface and the aft surface. An airfoil component for a gas turbine engine includes a platform. The airfoil component includes a flow path surface from which an airfoil extends. A laterally extending aft surface is adjacent to the flow path surface. A contoured surface adjoins the flow path surface and the aft surface. The aft surface extends from a first aft edge to a second aft edge at a circumferentially extending edge. The contoured surface is arranged inboard from at least one of the first and second edges.

Abstract: A stator vane arrangement for a turbine engine includes a first vane platform, a second vane platform and a plurality of stator vanes extending radially between the first and the second vane platforms. The first and the second vane platforms extend circumferentially around an axis, and the first vane platform includes an aperture. The stator vanes are arranged circumferentially around the axis, and include a first stator vane that extends radially into the aperture and is fastened to the first vane platform.

Abstract: A seal for a gas turbine engine includes a first seal structure and a second seal structure. The first seal structure is separated from the second seal structure by a gap. The first seal structure includes an injector extending into the gap with an outlet that is in fluid communication with a fluid source. Fluid issuing from the outlet and against the second seal structure magnifies a vortex formed within the gap by fluid traversing the gap.

Abstract: A radial position control assembly for a gas turbine engine stage includes a case structure. A supported structure is operatively supported by the case structure. A support ring operatively supports the supported structure. The supported structure and the support ring have different coefficients of thermal expansion. A sealing structure is adjacent to the supported structure. The support ring maintains the supported structure relative to the sealing structure at a clearance during thermal transients based upon a circumferential gap between adjacent supported structure and based upon a radial gap between the support ring and the supported structure. A pin supports the supported structure relative to the case structure and is configured to isolate the support ring from loads on the supported structure.

Abstract: A gas turbine engine includes a plurality of airfoils that are circumferentially arranged to rotate about an engine central axis. Each of the airfoils includes a base and a free tip end. The tip end includes first and second porous abradable elements that are axially spaced apart. The first porous abradable elements of the airfoils circumferentially align with each other, and the second porous abradable elements of the airfoils circumferentially align with each other.

Abstract: An active clearance control system of a gas turbine engine includes an air seal segment with a bridge hook having a lugged aperture.

Abstract: An active clearance control system for a gas turbine engine includes an intersegment seal engaged with each pair of a multiple of air seal segments.

Abstract: An active clearance control system for a gas turbine engine includes an air seal segment and a puller engageable with the air seal segment.

Abstract: An active clearance control system for a gas turbine engine includes a ring seal engageable with a multiple of air seal segments.

Abstract: An energy recovery apparatus adapted for use in a refrigeration system comprises a housing, a turbine, a first nozzle, and a second nozzle. The housing has a nozzle receiving opening and a discharge port. The first and second nozzles are each operably connectable to the housing in alignment with the nozzle receiving opening. Each nozzle is adapted to expand refrigerant and discharge it in a liquid-vapor state. The size or shape of the second nozzle is different from the size or shape of the first nozzle to enable a user to selectively choose one of the first and second nozzles for operable connection to the housing. The user may make the choice that accomplishes the better refrigerant flow characteristics when the passageway of the chosen nozzle is within the refrigeration system.

Abstract: A turbine section of a gas turbine engine according to an example of the present disclosure includes, among other things, a first turbine section and a second turbine section. The first turbine section has a first exit area and rotates at a first speed. The second turbine section has a second exit area and rotates at a second speed. A first performance quantity is defined as the product of the first speed squared and the first exit area. A second performance quantity is defined as the product of the second speed squared and the second exit area.

Abstract: Fan blade containment systems and methods for producing the same are provided. The fan blade containment system comprise a first ballistic material configured to be wrapped in overlapping layers around a fan casing to form a containment covering of a fan containment case for the fan casing. A plurality of patches comprised of a second ballistic material are configured to be loosely disposed between adjacent overlapping layers of the first ballistic material with each patch partially overlapping a circumferentially adjacent patch.

Abstract: A seal may be used in a shroud ring of a turbine. The seal includes a first strip, a second strip, and a flow-control band that extends between and interconnects the first and second strips to control the flow of a fluid through the seal.

Abstract: A turbine section of a gas turbine engine according to an example of the present disclosure includes, among other things, a fan drive turbine section and a second turbine section. The fan drive turbine section has a first exit area at a first exit point and is configured to rotate at a first speed. The second turbine section has a second exit area at a second exit point and is configured to rotate at a second speed, which is faster than the first speed.

Abstract: A gas turbine engine according to an example of the present disclosure includes, among other things, a fan shaft configured to drive a fan, a support configured to support at least a portion of the fan shaft, the support defining a support transverse stiffness and a support lateral stiffness, a gear system coupled to the fan shaft, and a flexible support configured to at least partially support the gear system. The flexible support defines a flexible support transverse stiffness with respect to the support transverse stiffness and a flexible support lateral stiffness with respect to the support lateral stiffness. The input defines an input transverse stiffness with respect to the support transverse stiffness and an input lateral stiffness with respect to the support lateral stiffness.

Abstract: A fan platform for a gas turbine engine may include an outer flow path surface extending between a first side and a second side. An inner surface extends between the first side and the second side, and faces radially oppositely the outer flow path surface. A plurality of platform hooks may extend radially inwardly from the inner surface.