Tool method and system for flushing a vertical riser

摘要

A system for cleaning of vertical risers at floating drilling rigs, which comprises the following main components: a high-pressure pump (16); an umbilical hose (26) comprised of a hydraulic tubing and an electric cable, a cable winch unit (18) and an internal flushing device (20). The flushing device comprises a number of spring loaded centring wheels (32) around the body (31), one or more rotary high-pressure jets (34) in the body (31), collecting means (38) for larger particles at the lower section of the body (31) and a camera (40) fitted to the underside of the tool (30).