公开(公告)号：US20180094520A1

公开(公告)日：2018-04-05

申请号：US15564972

申请日：2015-04-15

Applicant: STATOIL PETROLEUM AS

Inventor： Torbjørn Vegard LØKKEN ,  Dag Hendrik FLØLO

IPC: E21B47/10 ,  E21B33/035 ,  E21B47/00 ,  E21B41/00

CPC classification number: E21B47/10 ,  E21B33/0355 ,  E21B41/0007 ,  E21B47/0001

Abstract: A method of calibration of an in-line monitoring instrument in a subsea installation (6), comprises using an umbilical (4) for transportation of a sample fluid from the subsea installation (6) to a topside installation (2) and/or for transportation of a reference fluid from the topside installation (2) to the subsea installation (6); comparing measurements of the sample fluid or the reference fluid by the in-line monitoring instrument with measurements of the same fluid obtained previously or subsequently by topside instruments; and adjusting the calibration of the in-line monitoring instrument in the subsea installation (6), if required, based on the results of the comparison of measurements.