Oceaneering International, Inc.

Subsea 7 Norway as

Christopher S Mancini

Nathaniel Dieringer

Peter Andrew Robert Moles

Kevin Frances Kerins

Charles Tyrrell

Kevin Francis Kerins

Hans Anton Kros

Daniel J Scoville

Thomas Chance

Olivier Benjamin Labulle

Nathaniel James Dieringer

Jason Caulk

A method of sanitising seawater at a subsea location comprises: exposing flow of seawater in a treatment reactor to UV radiation that sanitises the seawater without the addition of sanitising chemicals; and outputting the sanitised seawater from the reactor into a subsea structure such as a pipeline or a wellhead. The flow of seawater may be exposed to successive emitters of UV radiation such as pressure-compensated LEDs. The efficacy of sanitisation may be determined by: injecting a tracer fluid into the flow of seawater upstream of the reactor; and, downstream of the reactor, sensing transformation of the tracer fluid due to exposure of the tracer fluid to the UV radiation in the reactor.

Sanitising seawater at subsea locations

A resident remotely operated vehicle may be deployed subsea by deploying a remotely operated vehicle (ROV) () configured to be disposed and remain resident subsea for an extended time where the ROV comprises an ROV electrical power connector port () to be operatively connected to an electrical power supply () dedicated to the ROV. An RTMS configured to be disposed subsea for an extended time is also deployed subsea (), typically proximate the ROV. A subsea docking hub subsea is also deployed subsea proximate the RTMS and operatively connected to the ROV and the RTMS. In addition, an umbilical is connected from the subsea docking hub to a subsea structure and a signal supplied from the subsea structure to the ROV.

Autonomous ROVs with offshore power source that can return to recharge

Systems and methods comprise structures and methods for using a plurality of chemicals which are mixed subsea, resulting in a heated fluid which can be delivered by various means to an area about a subsea structure such as a pipe or other structure which has been compromised by a plug such as a solid gas hydrate or paraffinic plug. Various embodiments allow for selective use of insulated chambers and baffled conduits and the like, or combinations thereof, to aid in the mixing of the various chemicals and achieving a desired temperature.

System and method for subsea structure obstruction remediation using an exothermic chemical reaction

The invention relates to a running tool for subsea junction plate assembly installation. The invention further relates to a method for installing a junction plate assembly using the running tool of the present invention.

Subsea junction plate assembly running tool and method of installation

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Houston, TX, United States of America

Christopher S Mancini