... basin drilling operation otc 5808 water depth completion upstream oil & gas marlim vehicle sea bottom foundation OTC 5808 Deepwater Drilling by L.C. Chita and A.L. Cordeiro, Petrobras SA This paper was presented at the 20th Annual OTe in Houston, Texas, May 2-5, 1988. The material...

... and wave induced oscillatory water particle motions near the sea bottom. The velocity profile close to the bottom depends on many factors including wave action, stratification, moveable bed effects, and topography. To evaluate a model that predicts the velocity profile (boundary layer), it is therefore...

... is positioned by an acoustic system. Two structures bearing a sheave for the pulling cables are lowered to the sea bottom and stabbed to the two bases respectively. All re-entries are performed by the acoustic guidelineless drilling method. Final direct or side pulling is done by winches and heave compensators...

... in areas of active scouring, "glory holes" or excavations are prepared in which the blowout preventors are placed for protection from the ice. The first good records of sea bottom scouring in the Canadian Beaufort Sea were obtained during the summer of 1970 (1). These side scan sonar and echo sounder...

...-temperature of the internal fluid, is further increased by cyclic loads of sensible extent, resulting from hydro elastic phenomena of interaction between spanning pipe and sea bottom currents; the synchronization between the characteristic frequencies Forte-shedding and the natural frequencies of the spans...

... ABSTRACT The greater part of submarine cable failures are, at present, caused by ship anchors or fishing gear. The technique for burying cable in the sea bottom, as an effective counter-measure to this, was developed by KDD. It was first adopted in the Japan-China submarine cable system...

... module upstream oil & gas arrangement umbilical cable surface equipment digging tool operation vehicle offshore pipeline means tm 402 sea bottom burial cable guidance arm support vessel installation OTC 3983 TM 402 - ANEW OPERATING CABLE AND PIPE BURYING SYSTEM by Vincenzo Di Tella...

... Abstract When a pipelaying operation is performed in deep water, a joint of pipe may take 'one or two days to travel from the lay barge to the sea bottom. During this time, it is subjected to dynamic loads due to barge motion, waves, and currents. The oscillatory stresses induced by the loads...

... Abstract A method for analyzing the dynamic behaviour of marine pipelines subjected to impact loads or sudden forced movements is outlined. Inertia forces (also from hydrodynamic mass), hydrodynamic drag forces as well as friction and lift effects for a pipe at the sea bottom are accounted...

... towards the dredger. This has been observed and described by De Koning (see Ref.2) Figure 5 makes it clear what is happening when sand is sucked up from the sea bottom A. The suction pit D is filled continuously by sand slides B, which results in an ever-enlarging pit around the deep central suction pit...

... consideration requirement submarine cable paper impregnated power submarine cable new orleans sea bottom operation otec project voltage otec application cable possible alternative generating plant development work water depth riser cable bottom cable OTC 3339 POWER SUBMARINE CABLES FOR OTEC...

... ABSTRACT Echo sounding, side scan sonar and seismic profile records in the Canadian Beaufort Sea provide evidence of trenches or "scours" on the continental shelf sea bottom. These are generally believed to be caused due to grounding of ice masses. Records obtained over a three year period...

... off and the clean cuttings drop to the sea bottom. Figure 1 is a photograph taken under a drilling well at a time when a particularly large pile of cuttings had dropped off the shale shaker so that there would be sufficient mud and chips in the water to make a good picture. The downpipe is poorly...

... are, of course, sensitive to elevation angle e, and water depth. The sea surface was considered a perfectly reflecting, free surface and the effects of cavitation were neglected. The reflection coefficient for the sea bottom was based on a bottom of dense, wet clay. 5 The wave is considered to reflect from...

... in the year. chemical spill sea bottom ringed seal permafrost federal government oil spill environmental research program program canadian beufort research sea sea ice reservoir characterization drilling migration water depth discharge upstream oil & gas blowout assessment...

... capable of carrying out earth-moving jobs in deep water. For example, the installation of gravity structures (storage tanks, drilling-production platforms, subsea production systems) may require the execution of various underwater operations for the leveling of the sea bottom. In particular the burial...

..., the depths of the sea were a great mystery. He had a few soundings made with a rope or wire line to tell him tantalizing bits of information about the topography of the sea bottom. But even so prominent and ubiquitous a submarine topographic feature as the sea mount or guyot had to wait until World War II...

... described in this paper is especially suited for the applications in those deep sea areas where Doppler Sonar does not reach the sea bottom and where Loran-C signals can be received. As the accuracy of the system proved to be a few hundred meters it meets the requirements of many research vessels especially...

...) measurements of horizontally stratified, multilayered bottom sediments can be made to a penetration depth of approximately 100 beneath the sea floor. The data can be used, together with _other parameters, to determine the seismic response of sea-bottom sediments for use in establishing seismic design criteria...

... diameter. This long wave solution, however, converges towards exact solutions when the cylinder top is either approaching the sea surface or the sea bottom. From the formulae obtained, a set of still simpler asymptotic expressions for the forces due to very' long waves are deduced. The very long wave...