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:
Jun. 18, 1985
Filed:
Dec. 20, 1982
Hans J Paap, Bellaire, TX (US);
Harry D Smith, Jr, Houston, TX (US);
Texaco Inc., White Plains, NY (US);
Abstract
A method for measuring the location, linear flow rate, and volume flow rate of undesired water flow behind well casing in a well includes irradiating borehole environs with high energy neutrons from a neutron source located in a well tool in the borehole. Gamma rays from the decay of an unstable isotope which comprises a portion of any undesired behind casing flow present are detected with gamma ray detectors located in the well logging tool. Count signals representative of the detected gamma rays from at least one of the detectors are separated into at least three energy dependent signals. A ratio signal corresponding to the ratio of at least two of the three energy dependent signals is generated and an indication of the linear flow rate of the undesired behind casing water flow in a preferred direction is determined from the count signals from the detectors and from the first predetermined relationship. An indication of the volume flow rate of the water flow is generated from said ratio signal, the energy dependent signal not used in a generation of the ratio signal and the linear flow indication from a second predetermined relationship.