... completion installation and operations resistance penetration process geologist plate penetrometer penetration resistance curve spudcan penetration resistance geology penetrometer resistance curve penetrometer and spudcan soil strength ratio mechanism strength ratio foundation...

... decreases as spudcan extraction progresses. Comparing simulation data to a theoretical model shows a relative error of about 3% for maximum pulling force. These findings provide valuable guidance for field spudcan extraction operations, addressing the limitations of empirical formulas commonly used in field...

... Abstract Most of the studies on spudcans are currently based on circular geometry; in this paper, the penetration process in the clay of rectangular spudcans is investigated. Centrifuge experiments and the PIV technique report the soil flow state in the penetration. Subsequently...

... subsea system slippage spudcan slip chord platform design jack up drilling platform uc value operation upstream oil & gas platform contact position footprint truss leg drilling equipment spudcan calculation result von mise stress strength great significance pinion stress...

... ABSTRACT Safe installation of mobile jack-up platforms requires accurate prediction of the vertical load-penetration curves of their large ∼20 m diameter spudcan footings. Difficulties can arise due to a change of soil strength from a soft to a stiff layer. A substantial increase...

... ABSTRACT The bearing capacity envelopes for a spudcan foundation in single layer sand or clay soil are well-documented based on model tests and finite element analyses. In reality, layered soils are common in the field and in such conditions it is also important to consider the combined...

... ABSTRACT To study the spudcan punch through in a kind of multilayered clay which is composed of thick soft-thin stiff-thick soft layers, centrifuge model tests were conducted. The results indicate that there are two typical resistance profiles determined by the strength ratios of the soft...

... ABSTRACT The interaction between the spudcan foundation of mobile jack-up rig and the piled foundation supporting the adjacent jacket platform is commonly referred as "spudcan-pile interaction". In the present study, this issue was investigated using small-scale model tests under normal...

... spudcans. The legs were fixed to the hull and had scaled flexural rigidity to ensure stress similitude between the model and prototype. A flexible connection was used between the loading device and platform model. The horizontal force and bending moments on the leg and inclination angle of the platform...

... Mechanism and Prediction of Spudcan Extraction Resistance Due to Base Suction Pan Gao1, Menglan Duan2, Ji Zeng1, Jianbo Li3 1. College of Ocean Science and Engineering, Shanghai Maritime University. Shanghai, China 2. Institute for Ocean Engineering, China University of Petroleum, Beijing. Beijing...

... ABSTRACT Installation of a jack-up platform is challenging on a hard sloping seabed. The installation and pre-loading can generate large bending moments on the spudcan and hence in the legs. Consequently, it may reduce the safety of the whole jack up system. The ISO jack-up standard (ISO 19905...

... ABSTRACT The reinstallation of jack-up rigs near an existing footprint has been identified as one of the key challenges in the offshore oil and gas industry. This study introduces the effect of spudcan shapes to minimise spudcan-footprint interaction. A series of 3D large-deformation finite...

... Study on Punch-Through Prediction and Risk Control Method of Jack-Up Spudcan Hao Xu, Zhenwen Liu, Lei Qi, Haifeng Deng, chun Li Key Laboratory of Offshore Engineering of CNPC, CNPC Engineering Technology Research Company Limited. Binhai New District, Tianjin, China ABSTRACT Jack-up rig...

... ABSTRACT Before well repairing operation, it is often necessary to install the jackup very close to the existing spudcan pits, which called footprints. The spudcan is prone to slide towards the footprint in this process, which can lead to damage of legs, jacking system and the hull structure...

... Research on Methodology of Jack-up Spudcan Pullout Analysis Chang Gao, Hongtao Li, Jianbing Qu, Qilei Tian Offshore Engineering Technology Center of China Classification Society Tianjin, China ABSTRACT Jack-up spudcan pullout is an important process to transmit the platform from elevated condition...

... ABSTRACT The jack-up barge or vessel is usually used to construct the offshore sub-structure or to install the wind turbine. Generally, legs of a jack-up barge equipped with spudcan to share the loading and to decrease the penetrated depth while they are set down on the seabed, but also left...

... Abstract A mobile jackup is an important facility in offshore oil and gas development and often works in close proximity to a permanent jacket platform. The unique operation method and foundation tip (spudcan) configurations of jackups have induced a number of geotechnical challenges. Among...

... Abstract This paper addresses spudcan penetration in stiff-over-soft clay, the reverse and multilayer deposits. Centrifuge model tests and large deformation finite element (LDFE) analyses were undertaken to provide insight into spudcan foundation behavior during vertical penetration through...

.... An axisymmetric model with layered seabed is established according to ZUOYE-5 jack-up. And the seabed is simulated with the Mohr-Coulomb elastoplasticity constitutive model. The ALE method can accurately simulate the large deformation of spudcan penetration, the ultimate bearing capacity of foundation...

... Abstract For the problem that the suction force forms at the bottom of spudcan during uplift operation for jack-up, based on correlative soil mechanics and permeation fluid mechanics computational theories and methods, the law and formation mechanism of the suction force at the bottom...