US 9,810,613 B2
System and method for sensing displacement of subsea structures
Fadhel Rezgui, Clamart (FR); Erik Rhein-Knudsen, Clamart (FR); Olivier Sindt, Sugar Land, TX (US); Vincent Alliot, Paris (FR); and Patrice Ligneul, Elancourt (FR)
Appl. No. 14/417,114
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
PCT Filed Jul. 24, 2013, PCT No. PCT/IB2013/056078
§ 371(c)(1), (2) Date Jan. 23, 2015,
PCT Pub. No. WO2014/016784, PCT Pub. Date Jan. 30, 2014.
Claims priority of provisional application 61/762,576, filed on Feb. 8, 2013.
Claims priority of provisional application 61/729,983, filed on Nov. 26, 2012.
Claims priority of provisional application 61/675,739, filed on Jul. 25, 2012.
Claims priority of application No. 12290250 (EP), filed on Jul. 24, 2012; and application No. 12189912 (EP), filed on Oct. 25, 2012.
Prior Publication US 2015/0211968 A1, Jul. 30, 2015
Int. Cl. G01N 3/08 (2006.01); E21B 47/00 (2012.01); G01M 5/00 (2006.01); G01B 7/16 (2006.01); G01L 1/22 (2006.01); G01L 5/10 (2006.01); E21B 17/01 (2006.01); G01D 5/02 (2006.01)
CPC G01N 3/08 (2013.01) [E21B 17/012 (2013.01); E21B 47/0006 (2013.01); G01B 7/18 (2013.01); G01D 5/02 (2013.01); G01L 1/2243 (2013.01); G01L 5/102 (2013.01); G01M 5/0025 (2013.01); G01M 5/0083 (2013.01)] 31 Claims
OG exemplary drawing
 
1. A system for sensing displacement on a subsea structural system, the system comprising:
an elongated frame having a first end and a second end;
a first anchoring spike mounted to the first end of said elongated frame and configured to anchor said sensing system to a structural element of the subsea structural system at a first location;
a second anchoring spike configured to anchor said sensing system to the structural element at a second location;
and a sensing blade with a longitudinal axis, first and second ends, and at least one sensor instrument formed thereon configured to sense bending of said sensing blade, said sensing blade being mounted and configured such that displacement between said first and second locations can be sensed as bending of the sensing blade;
wherein said longitudinal axis of the sensing blade is non-parallel to a direction of sensed displacement.