National Oilwell Norway AS Patent applications |
Patent application number | Title | Published |
20150108377 | Internal Blow Out Preventer - An internal blow out preventer for use in a drill string, comprising a housing having an outer valve closure element and where the outer valve closure element is configured to be moved between an open and a closed position, wherein the outer valve closure element is provided with an inner valve closure element that is configured to be moved between an open and a closed position inside the outer valve closure element. | 04-23-2015 |
20120305102 | Internal Blow Out Preventer - An internal blow out preventer for use in a drill string, comprising a housing having an outer valve closure element and where the outer valve closure element is configured to be moved between an open and a closed position, wherein the outer valve closure element is provided with an inner valve closure element that is configured to be moved between an open and a closed position inside the outer valve closure element. | 12-06-2012 |
20120217016 | RISER TENSIONER - An apparatus for tensioning a marine riser comprising a support for a number of actuators, where the support is connected to a vessel's structure, and where each actuator is connected to the support and to a marine riser, and where elements of the riser tensioner apparatus are enclosed. | 08-30-2012 |
20110156921 | METHOD FOR DETECTION OF A FLUID LEAK RELATED TO A PISTON MACHINE - A machine includes at least one piston and a pump shaft. A method for detecting a leak in the machine includes receiving a vibration signal from a vibration sensor disposed on at least one of an upstream pipe and a downstream pipe of the machine, receiving a rotational speed signal and an angular shaft position signal from a speed and position sensor disposed on the machine, calculating a rotational speed and an angular shaft position of the pump shaft, calculating at least one complex harmonic Fourier amplitude of the received vibration signal, low pass filtering the at least one complex harmonic Fourier amplitude, calculating a deviation amplitude as a magnitude of a complex difference between the filtered amplitude and a base amplitude, and monitoring the deviation amplitude to detect a leakage. | 06-30-2011 |
20110046902 | Method for Detection of a Fluid Leak Related to a Piston Machine - A method for detection of a fluid leak related to at least one piston machine ( | 02-24-2011 |
20100303591 | MEANS FOR EMPTYING PACKAGES - The invention relates to a sack cutting means ( | 12-02-2010 |
20100206562 | CENTRALIZING DEVICE FOR AN ELONGATED BODY IN A MOUSE HOLE MACHINE - A centralizing device ( | 08-19-2010 |
20100200216 | Collector Device for Drilling Fluid - A collector device ( | 08-12-2010 |
20100189580 | METHOD FOR DETECTION OF A MALFUNCTION RELATED TO A FLUID AFFECTED COMPONENT IN A PISTON MACHINE - A method for detection of a leak in a fluid affected component of a piston machine includes obtaining a vibration signal from a vibration sensor disposed proximate to at least one valve block of the piston machine. The vibration signal includes vibration generated by valves in the valve block. The method further includes presenting the obtained vibration signal for analysis by at least one of a human or a computer, analyzing the obtained vibration signal with respect to revealing a malfunction related to a fluid affected component of the piston machine, and selecting the obtained vibration signal emitted from the valve block during the closed periods of the valves for presentation. | 07-29-2010 |
20100157722 | MEANS AND METHOD FOR MIXING A PARTICULATE MATERIAL AND A LIQUID - A means for securing a proper mixing of a particle shaped material, such as powder, into a liquid by supplying shear forces in a mixing zone, the shear forces being produced by pumping liquid through a restriction ( | 06-24-2010 |