Abstract: The present disclosure provides methods and compositions for controlling asphaltenes in a subterranean formation. The compositions may include silica, a polymer, and optionally a charged surfactant. The compositions may also include a solvent or other additives. The methods may include injecting the compositions into subterranean formations and inhibiting asphaltene precipitation.

Abstract: The present disclosure provides methods and compositions for controlling asphaltenes in a subterranean formation. The compositions may include a halloysite nanotube. The nanotube has a lumen and a polymer, along with a charged surfactant, may be disposed in the lumen. A wax may be disposed on the nanotube. The wax may be disposed at either or both ends of the nanotube, thereby temporarily preventing the polymer and charged surfactant from leaving the lumen.

Abstract: The present disclosure provides methods and compositions for controlling asphaltenes in a subterranean formation. The compositions may include silica, a polymer, and optionally a charged surfactant. The compositions may also include a solvent or other additives. The methods may include injecting the compositions into subterranean formations and inhibiting asphaltene precipitation.

Abstract: The present disclosure provides methods and compositions for controlling asphaltenes in a subterranean formation. The compositions may include a halloysite nanotube. The nanotube has a lumen and a polymer, along with a charged surfactant, may be disposed in the lumen. A wax may be disposed on the nanotube. The wax may be disposed at either or both ends of the nanotube, thereby temporarily preventing the polymer and charged surfactant from leaving the lumen.

Abstract: The present disclosure provides methods and compositions for controlling asphaltenes in a subterranean formation. The compositions may include silica, a polymer, and optionally a charged surfactant. The compositions may also include a solvent or other additives. The methods may include injecting the compositions into subterranean formations and inhibiting asphaltene precipitation.

Abstract: A deposit-inhibiting composition has been developed that provides an advantageous reduction in the deposits of solids in the near wellbore region, and in equipment and lines used for crude oil production and processing. The deposit-inhibiting compositions contain a surface-active component comprising a phosphate ester component, a sulfurized olefin component, or a combination thereof; a polyalkylene ester; and an imidazoline compound. The deposit-inhibiting compositions are particularly useful as flow agents for delivery to a subsea wellhead via an umbilical line.

Abstract: A rotational positioning system in a wind turbine is provided that comprises a driven part, a plurality of positioning drives coupled to the driven part, a plurality of sensors each arranged to sense a load parameter indicative of the load of the respective positioning drive, and a load controller connected to the plurality of sensors. The load controller is arranged to determine a load of a respective positioning drive based on the sensed load parameter, to compare said load with an expected load value, and to output a signal indicative of a failure of the respective positioning drive in response to the load being smaller than the expected load value.

Abstract: This disclosure relates to anti-agglomerant low dosage hydrate inhibitors that can inhibit the formation of hydrate agglomerants and/or plugs. The anti-agglomerant low dosage hydrate inhibitors can be surfactants. The hydrate inhibitors can be used for inhibiting, retarding, mitigating, reducing, controlling and/or delaying formation of hydrocarbon hydrates, agglomerants of hydrates, and/or plugs. The hydrate inhibitors can be applied to prevent, reduce, and/or mitigate plugging of conduits, pipes, transfer lines, valves, and other places or equipment where hydrocarbon hydrate solids can form. The hydrate inhibitors can be zwitterionic or cationic ammonium surfactants.

Abstract: The present invention generally relates to one or more compositions and methods for inhibiting the formation of gas hydrate agglomerates in a fluid using a fluorine-containing agent and an anti-agglomerant. The fluid may be contained, for example, in an oil or gas pipeline or refinery.

Abstract: A rotational positioning system in a wind turbine is provided that comprises a driven part, a plurality of positioning drives coupled to the driven part, a plurality of sensors each arranged to sense a load parameter indicative of the load of the respective positioning drive, and a load controller connected to the plurality of sensors. The load controller is arranged to determine a load of a respective positioning drive based on the sensed load parameter, to compare said load with an expected load value, and to output a signal indicative of a failure of the respective positioning drive in response to the load being smaller than the expected load value.

Abstract: A rotational positioning system in a wind turbine is provided that comprises a driven part, a plurality of positioning drives coupled to the driven part, a plurality of sensors each arranged to sense a load parameter indicative of the load of the respective positioning drive, and a load controller connected to the plurality of sensors. The load controller is arranged to determine a load of a respective positioning drive based on the sensed load parameter, to compare said load with an expected load value, and to output a signal indicative of a failure of the respective positioning drive in response to the load being smaller than the expected load value.

Abstract: This disclosure relates to anti-agglomerant low dosage hydrate inhibitors that can inhibit the formation of hydrate agglomerants and/or plugs. The anti-agglomerant low dosage hydrate inhibitors can be surfactants. The hydrate inhibitors can be used for inhibiting, retarding, mitigating, reducing, controlling and/or delaying formation of hydrocarbon hydrates, agglomerants of hydrates, and/or plugs. The hydrate inhibitors can be applied to prevent, reduce, and/or mitigate plugging of conduits, pipes, transfer lines, valves, and other places or equipment where hydrocarbon hydrate solids can form. The hydrate inhibitors can be zwitterionic or cationic ammonium surfactants.

Abstract: This disclosure relates to anti-agglomerant low dosage hydrate inhibitors that can inhibit the formation of hydrate agglomerants and/or plugs. The anti-agglomerant low dosage hydrate inhibitors may be surfactants. The hydrate inhibitors may be used for inhibiting, retarding, mitigating, reducing, controlling and/or delaying formation of hydrocarbon hydrates, agglomerants of hydrates, and/or plugs. The hydrate inhibitors may be applied to prevent, reduce, and/or mitigate plugging of conduits, pipes, transfer lines, valves, and other places or equipment where hydrocarbon hydrate solids may form. The hydrate inhibitors may be cationic ammonium surfactants having an ionizable secondary amine.

Abstract: The present invention generally relates to methods and high molecular weight polymeric flocculants for removing a polymeric low dose hydrate inhibitor. More specifically, the method comprises contacting a high molecular weight polymeric flocculant to an aqueous fluid containing the polymer low dose hydrate inhibitor. The high molecular weight polymeric flocculants comprises repeating units derived from an anionic monomer.

Abstract: The present invention generally relates to one or more compositions and methods for inhibiting the formation of gas hydrate agglomerates in a fluid using a fluorine-containing agent and an anti-agglomerant. The fluid may be contained, for example, in an oil or gas pipeline or refinery.

Abstract: Provided is a wind turbine that includes a tower, a nacelle, a plurality of light sources mounted within the tower and the nacelle, and a wireless lighting control system. The wireless lighting control system includes a first locally controllable switch for controlling power to the plurality of light sources and a second locally controllable switch for controlling power to the plurality of light sources. The first and second locally controllable light switches are located remotely from each other. The wireless lighting control system further includes a remotely controllable light switch located at each of one or more of the light sources. The remotely controllable switch is configured to wirelessly receive a switch-on signal generated in response to manipulation of at least one of the first and second locally controllable switches, and switch on power to the corresponding light source in response to receiving the switch-on signal.

Abstract: This disclosure relates to anti-agglomerant low dosage hydrate inhibitors that can inhibit the formation of hydrate agglomerants and/or plugs. The anti-agglomerant low dosage hydrate inhibitors may be surfactants. The hydrate inhibitors may be used for inhibiting, retarding, mitigating, reducing, controlling and/or delaying formation of hydrocarbon hydrates, agglomerants of hydrates, and/or plugs. The hydrate inhibitors may be applied to prevent, reduce, and/or mitigate plugging of conduits, pipes, transfer lines, valves, and other places or equipment where hydrocarbon hydrate solids may form. The hydrate inhibitors may be cationic ammonium surfactants having an ionizable secondary amine.

Abstract: Provided is a wind turbine that includes a tower, a nacelle, a plurality of light sources mounted within the tower and the nacelle, and a wireless lighting control system. The wireless lighting control system includes a first locally controllable switch for controlling power to the plurality of light sources and a second locally controllable switch for controlling power to the plurality of light sources. The first and second locally controllable light switches are located remotely from each other. The wireless lighting control system further includes a remotely controllable light switch located at each of one or more of the light sources. The remotely controllable switch is configured to wirelessly receive a switch-on signal generated in response to manipulation of at least one of the first and second locally controllable switches, and switch on power to the corresponding light source in response to receiving the switch-on signal.

Abstract: A rotational positioning system in a wind turbine is provided that comprises a driven part (101), a plurality of positioning drives (102) coupled to the driven part (101), a plurality of sensors (111) each arranged to sense a load parameter indicative of the load of the respective positioning drive (102), and a load controller (112, 113, 114, 115) connected to the plurality of sensors (111). The load controller (112, 113, 114, 115) is arranged to determine a load of a respective positioning drive (102) based on the sensed load parameter, to compare said load with an expected load value, and to output a signal (115) indicative of a failure of the respective positioning drive (102) in response to the load being smaller than the expected load value.