Abstract: An apparatus for and method of cleaning a fire main associated with a deluge system. The method comprises injecting a chemical treatment fluid into the fire main via a first inlet and causing it to flow along a section of the fire main and out through an outlet while the fire main is in an operative condition associated with a deluge system. In one aspect, the method comprises biociding the fire main with a solution of chlorine dioxide to treat or remove tuberculation from the fire main.

Abstract: A method of cleaning a fluid conduit in a hydrocarbon production installation is described. The method comprises introducing a flexible hose into a fluid conduit system through a pressure control device, and running the flexible hose into a conduit to be cleaned while a fluid stream flows in the conduit. At least one substance is cleaned from the conduit by pumping a cleaning fluid into a bore of the flexible hose and expelling the cleaning fluid from the flexible hose into the conduit through at least one outlet in the flexible hose. The substance is carried the at least one substance in the fluid stream to a conduit outlet.

Abstract: The invention provides a method and apparatus for removing a blockage from a fluid conduit. An apparatus comprises a first portion containing a fluid volume separated from the fluid conduit via a controllable valve. The valve is cyclically opened and closed such that a pressure differential between the first portion and the fluid conduit causes a series of pressure pulses in the fluid conduit. The pressure differential is regulated to control the amplitude of the pressure pulses of the series.

Abstract: A method and apparatus for monitoring a fluid that is to be transported through a fluid conduit within a hydrocarbon exploration and production installation is described. A monitoring zone is established upstream of the fluid conduit configured such the fluid supply to the fluid conduit is introduced via the monitoring zone. The fluid supply within the monitoring zone is monitored for the occurrence of events detrimental to the flow of the fluid supply through the fluid conduit. Monitoring the fluid supply prior to entering the fluid conduit allows for the early detection of an event detrimental to the flow of the fluid supply e.g. a chemical reaction indicative of corrosion of the fluid conduit or the formation of a potential blockage within the fluid conduit. In this way the risk of costly blockages or structural failure occurring within the fluid conduit is reduced.