|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||405/154 ; 730/40..5R ; 730/407|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 23 인용 특허 : 28|
A method is disclosed for pipeline leak detection in which a vacuum is maintained in the annulus of a pipe-in-pipe flowline with a vacuum pump having a discharge reservoir which is monitored for the appearance of water and hydrocarbon vapors. In another aspect of the invention pipeline leak detection is accomplished through maintaining a gas at a nominally constant pressure in an annulus of a pipe-in-pipe flowline and monitoring the annulus for pressure increase indicative of water or product intrusion into the annulus.
[ What is claimed is:] [1.] A method for pipeline leak detection in extended subsea pipelines, comprising:maintaining a vacuum in the annulus of a pipe-in-pipe flowline with a vacuum pump having a discharge reservoir; andmonitoring the discharge reservoir for the appearance of seawater leaking into the annulus through an outer pipe and hydrocarbon vapors leaking into the annulus through an inner pipe.