Neural network modelling has been applied to search for novel high strength steel weld metal compositions, potentially offering improved tolerance to variations in the weld thermal cycle. An experimental 7 wt% Ni manual metal arc electrode, formulated on these predictions, was used to produce all-weld metals and welds in high strength steel. Mechanical properties were correlated to weld metal m...

Sir Humphry Davy witnessed the first chlorine hydrate crystallizing in 1811. Couple of century later his discovery, natural gas hydrates has begun to play an important role in energy business. From being a mere chemical curiosity, they have proven to be a nuisance for the natural gas industry. The problem of hydrate induced blockage in “wet gas” flow systems has been widely reported and became ...

Emulsion of waxy crude oil is one of the common states in the subsea pipeline. At low temperatures in offshore environment, waxy crude oils with water could form the crude oil emulsion gel of oil-in-water emulsion. Thus, the waxy crude oil emulsion viscoelastic behavior for deep sea transportation and restarting pipeline safety is particularly important. By means of MASIII HAAKE rheometer which...

This paper empirically explores the concept of co-materialization to explain the digital innovation dynamics in offshore petroleum production. The central insight developed is that the very nature of subsurface processes and phenomena that may be monitored and controlled is transformed as offshore petroleum production is digitalized. The paper shows how digital technologies are intrinsic to thi...

Abstract Pressure pipelines use pressure to transport gas, liquefied and steam in the process of use. If there are defects pipeline, it is easy leak or burst, even cause secondary accidents. To ensure safety, necessary inspect regularly. However, difficult for pipeline empty internal medium. Therefore, great significance industrial under operating conditions. In this paper, X-ray testing experi...

ABSTRACT Excessive residual stress of the girth weld in pipes will directly damage pipe strength during its operation. Accurate measurement and effective reduction can ensure safety natural gas their service. In this paper, an X80-type large-diameter section with welds is taken as research object. The coercive force method used to characterize surroundings, then distribution law surroundings ob...