The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 18, 2008
Filed:
Mar. 19, 2004
Svein Erling Johnstad, Bønes, NO;
Fan-nian Kong, Oslo, NO;
Harald Westerdahl, Dal, NO;
Norsk Hÿdro ASA, Oslo, NO;
Abstract
A device for monitoring the position of an oil/water contact (OWC,) between an oil-continuous fluid () overlying a water-continuous fluid () inside a casing pipe (). The device includes a transmitter () for a generating an electromagnetic signal (ST) and the transmitter () is provided with electrical energy (G) from a voltage signal generator (G). The transmitter () is arranged inside the casing pipe () in the oil-continuous fluid () and above the oil-water contact (). The electromagnetic wave signal (S) partly propagates downwards from the transmitter (), is partly reflected from the oil-water contact (), and is partly reflected by the end of the casing, giving rise to an upward propagating, reflected electro-magnetic signal (S). The device also includes a sensor () for detecting the reflected electromagnetic signal (S), and the sensor () is also arranged above the oil-water contact (), providing a sensor signal (R) to a receiver () for receiving the sensor signal (R) and further to an analyzing device () for analyzing the sensor signal (R), e.g. with respect to two-way propagation time or amplitude in order to calculate an elevation level for the oil-water contact.