... 2.2). deepwater offshore ghana conductor location conductor jetted conductor performance offshore ghana wob investigation load demand soak time conductor jetted upstream oil & gas reciprocation penetration soil condition dataset reservoir characterization jubilee field...

... a full geotechnical profile at a given location, down to a depth of 35m below mudline. Cone penetration test (CPT) data are collected during initial free-fall insertion of the CPT Stinger apparatus. These data could be used to provide a continuous stratigraphic profile from mudline down to the depth...

...1. Introduction Understanding the processes associated with dy- namic penetration of rigid bodies from water into soft soil is challenging. This is principally because of: (a) an ill-defined transition from water to soil and selection of appropriate material re- sponses in this zone; (b) an extreme...

... for axial degradation analyses are reviewed in section 4, together with the available pile test data. reduction degradation penetration jardine offshore wind turbine renewable energy cyclic loading storm history axial pile capacity pile capacity hse cyclic axial loading capacity...

... new framework pipe weight offshore pipeline proc strength white dj pipe-soil interaction axial pipe-soil resistance penetration model test displacement interaction resistance friction factor axial pipe-soil interaction axial resistance randolph mf upstream oil & gas 1...

... 3 6m diameter steel mo- nopiles becoming commonplace. Pile driveability assesses the ability for a pile to be economically driven with an acceptably low risk of refusal and, ul- timately, to reach a desired penetration or capacity within a reasonable number of blows without over- stressing the steel...

... in segments before, and assembled during, installation. Assemblage re- quires a successive segment to be attached to a for- merly penetrated one by welding and often takes one day or more for two segments. During this period of time, the build-up of excess pore pressure in the soil below and around the pile...

... engineer. This paper reports experimental investigation of an iceberg keel shape penetrating sediment and discusses the influence of the depth of penetration on the drag force with its corresponding components. The study was aimed at estimating the drag force and its components in relation to scour...

..., or footprint ) at the site. The depth and con- figuration of a footprint are a function of several fac- tors. These include: (a) the soil type, strength and stratification; (b) the spudcan final penetration depth before extraction; (c) the degree of soil backfill dur- ing installation (unless the backfilled...

... Abstract Accurate spudcan penetration prediction is important for the safe and economic management of mobile offshore jack-ups. However, the current method for dealing with loose sand - by selection of a low friction angle in a general shear failure analysis - is unsatisfactory because...

..., they are not suitable for a site where soil layers with high-penetration resistance are present near the seafloor. In relation with geological fea- tures, such as pockmarks, gas hydrates, carbonates or mass flow deposits, penetration of suction piles might prove impossible. In this case, driven anchor piles may become...

... production system resistance norwegian geotechnical institute geotechnical design skarv fpso penetration upstream oil & gas prediction misorientation anchor location anchor geometry anchor suction anchor loading shear strength fpso offshore norway te langford subsea system strength...

... soft clay, must be assessed. This is because in these conditions the spudcan can push the stronger overlying layer into the softer underlying soil. Known as a punch-through, the subsequent re- duction of vertical load can cause the jack-up leg to uncontrollably penetrate. Several platform failures have...

.... Then the z displacements were obtained by a double integration versus time of the measured acceleration. The analyses of results allowed the authors to estimate the amplitude and the duration of the elastic recoil of the aramid cable, andto distinguish four steps during the 4 seconds of penetration...

... frames in order to reduce soil disturbance and frame penetration in the soil. The continuous piezocone test (CPTU) is a standardised test which involves pushing a rod at a constant speed into the soil. The rod is equipped with sensors that allow the measurement of three parameters: cone resistance, qc...

... ABSTRACT In most offshore design projects, in situ penetrometer tests are first correlated with element test data in order to assess a suitable resistance factor, so that effectively the absolute value of penetration resistance is not used directly. However, given the difficulty in obtaining...

...), as this offered the possibility of conducting multiple spudcan penetration tests with one sample. The ring channel of this machine has an outer di- ameter of 1.2m, an inner diameter of 0.8m and a channel height (sample width) of 0.3m. When testing at 250g, this size provides a full-scale testing area of 360m...

... Investigation and Geotechnics Conference: Confronting New Challenges and Sharing Knowledge, 11 13 September 2007, London, UK 295 4.2 Calibration studies Magellan spudcan installation In order to analyse the response of the GSF Galaxy-I struc- ture to eccentric spudcan penetration, it was first necessary...

... at the location to a maximum penetration of 78.2m below the seafloor. The boreholes confirmed the predominance of granular soils in the top 75m except for two minor clay layers above 11m penetration and a 3m thick layer below 31m penetration. A generalised soil stratigraphy and related design soil param- eters...

... calculated (solid line in Figure 2d). The method is repeated until reaching the desired penetration. 2.3 Numerical solution Using the equations given in Section 2.1 and finite differences at each grid points, a non-linear sys- tem of equations can be derived, governing the path of the pile. Figure 3 shows...