Rigs and VesselsChinese yard completes sea trial for deep-water pipelay vesselNewbuild for Petrofac will be delivered this yearFinal tests: the JSD 6000 is a customised Ulstein SOC5000 design able to perform J-lay and S-lay pipelay work in water depths up to 3000 metres.Photo: ZPMCXu YiheHouston