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:
Sep. 17, 2002
Filed:
Jun. 19, 2000
Applicant:
Inventor:
Neil I. Douglas, Clevedon, GB;
Assignee:
ABB Offshore Systems Limited, Bristol, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 4/706 ; E21B 4/400 ;
U.S. Cl.
CPC ...
E21B 4/706 ; E21B 4/400 ;
Abstract
It is desirable to be able to monitor the condition of a filter in a fluid flow system, for example a sandscreen in a fluid well. The invention provides monitoring apparatus including an optical fibre having a pressure sensor . Pressure is exerted on the sensor, by fluid flowing through the sandscreen, via ports and . The pressure sensor is responsive to a light signal, and to the exerted pressure, to produce a sensing light signal indicative of a characteristic of the fluid flow, such as pressure differential or fluid velocity. This, in turn, is indicative of the condition of the sandscreen or filter.