... ABSTRACT This paper presents a case study of an offshore oilfield development project in the South China Sea, where the Dynamic Impact Loading Method by hydraulic hammering was successfully employed to drive suction buckets to the design depth. The project involved nine suction buckets, each...

... followers with different lengths and diameters during piling. The results show that shorter pile followers exhibit higher energy transfer efficiency, and the presence of stress wave rebound also impacts efficiency. Additionally, when the pile diameter is larger than the pile hammer diameter and closer...

... element method equation element model flexible body passenger transportation excitation element method coefficient deformation impact noise ship cabin hammer numerical prediction model virtual modal method iso frequency Proceedings of the Thirty-third (2023) International Ocean and Polar...

... foundation installation in deep-water, in order to fit the requirements of pile strength and stability when the hammer is placed on the pile top. specification foundation magnification factor deep-water platform requirement sea surface maximum base shear environmental load offshore platform...

... conservation. Principle of momentum conservation is also used by many people (Skeem, Friedman and Walker, 1979; Zhang, Li and Wang, 2004). packer upstream oil & gas axial force collar length tensile force time interval unstuck force impact force calculation hammer testing string slip...

... Abstract Hammer peening is widely adopted for steel structures in order to improve fatigue life of welded joints. The effect of hammer peening, under specific conditions, have been already confirmed in the previous experiments carried out by Morikage (2015). However, two main aspects need...

... Abstract Open ended steel piles, driven by underwater impact hammers, are used offshore for a range of subsea applications, including pipeline initiation, hold-down and hold-back anchors, subsea structures and platform piles, amongst others. The pile driveability analysis of such piles...

... design and driveability analysis. soil resistance friction distribution subsea system impact energy setup factor hsdt penetration restrike foundation capwap analysis silty clay ultimate capacity restrike test initial driving resistance upstream oil & gas hammer blow count...

... Abstract Driven piles are subjected to large impact forces delivered by hammers during installation. The excessive cyclic stresses raise the concern for both strength and fatigue. Pile drivability and stress and have become routine analysis using one dimensional discrete elements...

... analysis was performed to help determine the capacities of other piles not tested. installation restrike uw cable srd transducer wire transducer foundation upstream oil & gas application main cable capwap analysis mhu 1200 subsea system uw main cable penetration hammer soil...

... strength. Experiments with high frequency hammer peening techniques in comparison to shot peening processes reveal, that the penetration depth of the induced compressive residual stresses is higher after the application of the hammer peening processes. However this does not necessarily lead to the best...

... of hammering energy, hammering number, hammering frequency, and the time of stopping hammering. These differences are enough to change the accuracy of the original pile drivability analysis result. platform design strength soil skin friction subsea system upstream oil & gas pile drivability...

... parameter impact hammer matrix vibration composite beam composite material monitoring hammer modal property variation temperature change mode shape composite structure natural frequency Temperature Effect on the Modal Properties of Laminated Composite Structures Han-il Park , Hezhen Yang...

... using empirical calculations for a range of possible conditions. Design assumptions and acceptance criteria were modified during pile installation using hammer resistance observations as the primary indicator of geotechnical conditions. INTRODUCTION Following tragic sinking of the Ehime Maru fishing...

... and silt layers. The possibility of liquefaction of the loose layers as a result of cyclic loads such as earthquake, and therefore, reduction in shaft resistance of the pile are investigated. The Pile Driving Analyzer (PDA) was used for dynamic testing of the pile during driving by the hammer. The data...

.... The initial prototype uses a pneumatic hammer to drive a video camera probe into the seabed. During penetration, the tool, which is shaped like a wood chisel, slices through the unconsolidated material leaving a virtually undisturbed face exposed to the camera. A selection of other physical, chemical...

... Abstract The Ursa Tension Leg Platform is located in the Gulf of Mexico in approximately 4,000 ft of water. The foundation design for the platform requires the installation of sixteen 96" diameter piles, each to be driven to a depth of 396 ft with an underwater hammer. The predicted hammer...

... 1. Abstract: Pile monitoring was used most recently by SARAWAK SHELL for five offshore platform installations where piles and conductors were installed using steam hammers. This paper describes the experience with pile monitoring, detailing the information obtained during the pile...