	US 12,264,991 B2
	Apparatus, system and method for maintenance of a structure carrying a fluid
Frode Holte, Mandal (NO); Karsten Lien, Mandal (NO); and Amund Breland, Lindesnes (NO)
Assigned to Prosence AS, Mandal (NO)
Appl. No. 17/617,079
Filed by Prosence AS, Mandal (NO)
PCT Filed Jun. 11, 2020, PCT No. PCT/NO2020/050155 § 371(c)(1), (2) Date Dec. 7, 2021, PCT Pub. No. WO2020/251370, PCT Pub. Date Dec. 17, 2020.
Claims priority of application No. 20190720 (NO), filed on Jun. 12, 2019.
Prior Publication US 2022/0236134 A1, Jul. 28, 2022
Int. Cl. G01M 3/18 (2006.01)

CPC G01M 3/18 (2013.01)

21 Claims

1. A method of maintaining a condition of a non-leaking structure, the non-leaking structure carrying a fluid, the non-leaking structure provided with a jacket covering at least a portion of the structure, the jacket forming a pocket between the jacket and the structure, the pocket having an inlet and an outlet, the pocket acquiring a fluid therein, the method comprising:

injecting a drive fluid into the pocket in a flow through the inlet; and

moving the fluid in the pocket with the flow of injected drive fluid out of the pocket through the outlet, wherein the fluid is a corrosive fluid which has not leaked from the structure and which if not moved out of the pocket is capable of damaging the structure.