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Submarine Pipeline Trenching by Multipass Ploughs
Offshore Technology Conference, 1985ABSTRACT A major development program for large ploughs to trench submarine pipelines began in 1975, and has led to the construction of 13 ploughs, which have been used in many parts of the world. Deep trenches are best cut in a sequence of separate passes.
R.J. Brown, A.C. Palmer
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Design of a Submarine Oil Pipeline
Journal of Transportation Engineering, 1993Submarine oil pipelines carry hot crude oil obtained from offshore oil wells to an onshore location. As the flow proceeds, the crude oil progressively cools down, drastically changing its kinematic viscosity. This cooling increases the surface resistance to flow considerably. Analysis of such a pipeline is complicated because it involves a large number
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Concrete coating for submarine pipelines
Magazine of Concrete Research, 1982Synopsis A submarine pipeline is usually externally coated with reinforced concrete, the function of which is to protect the corrosion coating against impact damage, and give the pipe additional weight to stabilize it on the sea bed. There are unusual requirements in design and application technology. The paper examines the current state of knowledge
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Three-Dimensional Scour at Submarine Pipelines
Journal of Hydraulic Engineering, 2012This paper presents results of an experimental study on three-dimensional scour at submarine pipelines with uniform sediment under a unidirectional current in clear-water conditions. The data show that propagation of the scour hole in the transverse direction of flow may be divided into a rapid and a slack phase of development.
Yushi Wu, Yee-Meng Chiew
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Hydrodynamic Force Characteristics for Submarine Pipelines
Offshore Technology Conference, 1989ABSTRACT Field and laboratory measurements of forces for pipelines in wave plus current flow conditions demonstrate that peak forces may not be proportional to the total ambient velocity squared. Horizontal and vertical peak forces occurring in the half cycle when the wave and current velocities oppose (smaller ...
J.C. Chao, K.F. Lambrakos, R.L.P. Verley
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Mechanical Analysis on the Scour of Submarine Pipeline
Advanced Materials Research, 2013The reason about the scour of the submarine pipeline is researched in this paper. Through the mechanical analysis about the sand grain in the downstream of the pipe, the critical condition about of scour start is derived. The balance condition about the scour is studied.
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High Accuracy Positioning for Submarine Pipelines
Journal of Navigation, 1976Among the many problems arising from the exploitation of North Sea oil is that of finding practicable landfalls for the proposed pipelines. The oil companies have been confronted with some of the most difficult landfalls yet experienced where the requirement for precise positioning has been paramount. This paper, which was presented at a meeting of the
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