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:
Jan. 07, 2014
Filed:
Sep. 29, 2009
Johannis Josephus Den Boer, Rijswijk, NL;
Andre Franzen, Rijswijk, NL;
Daniel Joinson, Rijswijk, NL;
Kari-mikko Jääskeläinen, Houston, TX (US);
Johannis Josephus Den Boer, Rijswijk, NL;
Andre Franzen, Rijswijk, NL;
Daniel Joinson, Rijswijk, NL;
Kari-Mikko Jääskeläinen, Houston, TX (US);
Shell Oil Company, Houston, TX (US);
Abstract
A system for monitoring subsidence and/or rising of a waterbottom has string of pressure sensors along the interior of a sealed -protective tube(q−) that rests on the waterbottom and is filled with a low pressure liquid, so that any subsidence and/or rising of the can be deduced from subsidence and/or rising of a section of the tube and associated pressure variations measured by the sensors due to variation of the hydrostatic fluid pressure of the liquid in the of the tube. The tube interior is divided into segments by valves during descent to protect the sensors against hydrostatic pressure of the liquid within the tube during installation. The use of a low pressure liquid in the tube allows the use of sensitive pressure sensors which are able to monitor pressure variations of −0.001 Bar associated with a waterbottom subsidence of −1 cm, at a water depth of >km where the ambient water pressure may be >100 Bar.