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Keywords: mudmat
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Proceedings Papers

Paper presented at the The 33rd International Ocean and Polar Engineering Conference, June 19–23, 2023
Paper Number: ISOPE-I-23-130
... seabed treatment, the platform is relocated 180m to the southwest of the original location. The mudmats are designed below jacket bottom framing to adapt to sand waves profile. The jacket was successfully installed using accurate positioning and monitoring system, which provides reference for the design...
Proceedings Papers

Paper presented at the The 31st International Ocean and Polar Engineering Conference, June 20–25, 2021
Paper Number: ISOPE-I-21-2103
... than the minimum lateral dimension of the foundation element. Mudmat with skirts or without skirt is the typical shallow foundation. It is not sensitive to the water depth and easy to be installed. So, it is widely used for the foundation of subsea products in deep water if the geophysical condition...
Proceedings Papers

Paper presented at the The 31st International Ocean and Polar Engineering Conference, June 20–25, 2021
Paper Number: ISOPE-I-21-2104
... 681 to 753m. Several leading technologies were implemented in this project, such as highly integrated subsea PLEM, high reliable design for first deep water application of a newly developed multiphase flow meter (MPFM), light-weight mudmat and heavy PLEM J-Mode installation etc. The Liuhua 29-2 field...
Proceedings Papers

Paper presented at the The 31st International Ocean and Polar Engineering Conference, June 20–25, 2021
Paper Number: ISOPE-I-21-2165
... as a gravity base, but a hybrid pile foundation may also be applied coupled with mudmat depending on the API = American Petroleum Institute soil, loads and installation preferences. CAPEX = Capital Expenditure CALM = Catenary Anchor Leg Mooring COOEC = China Offshore Oil Engineering Corporation DNV GL = Det...
Proceedings Papers

Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-148
... ABSTRACT The simplest and most cost effective foundation to support deepwater subsea structures is a mudmat. As loads and weights increase, the attractiveness of a mudmat foundation disappears and the typical solution has been a costly suction caisson. A hybrid subsea foundation (HSF...
Proceedings Papers

Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-179
... plan. cage structure installation ssiv ssiv system support platform upstream oil & gas hydraulic system platform indicator design implementation subsea production equipment umbilical subsea pipeline subsea system protection structure mudmat controls and umbilicals valve...
Proceedings Papers

Paper presented at the The Twenty-fifth International Ocean and Polar Engineering Conference, June 21–26, 2015
Paper Number: ISOPE-I-15-126
... were developed to predict the failure envelopes under different scenarios. circular foundation loading aspect ratio equal torsion foundation undrained bearing capacity bearing capacity aspect ratio gourvenec mudmat mechanism shallow foundation square foundation soil heterogeneity...
Proceedings Papers

Paper presented at the The Twenty-fifth International Ocean and Polar Engineering Conference, June 21–26, 2015
Paper Number: ISOPE-I-15-602
... a representation of the mudmat, four corner piles, connected rigidly to the mudmat, and the seabed soil. The loading steps in the analyses were set such that the loading path in the foundation soils follow closely the anticipated actual loading history in the soil. Soil's strain softening behavior under large...
Proceedings Papers

Paper presented at the The Twenty-fifth International Ocean and Polar Engineering Conference, June 21–26, 2015
Paper Number: ISOPE-I-15-544
... Abstract Hybrid foundations, mudmats with corner pin-piles, were proposed recently to effectively resist the large lateral and vertical loads from the jumper and flowline walking loads. Previous hybrid foundation designs did not fully utilize the pin-pile axial capacity. Through a design case...
Proceedings Papers

Paper presented at the The Twenty-fourth International Ocean and Polar Engineering Conference, June 15–20, 2014
Paper Number: ISOPE-I-14-146
... of PY35-2 subsea manifold were presented, and the challenge and solution during the manifold development were presented as well. These can provide a good reference to the subsequent project in South China Sea. upstream oil & gas protection system mudmat valve stabplate fabrication...
Proceedings Papers

Paper presented at the The Twenty-third International Offshore and Polar Engineering Conference, June 30–July 5, 2013
Paper Number: ISOPE-I-13-206
... ABSTRACT The traditional method of subsea mudmat foundation stability analysis is to calculate the bearing capacity factor of safety using the classical approach given in the API RP 2GEO (2011, updated 2A). This classical approach can be overly conservative for foundations under complex...
Proceedings Papers

Paper presented at the The Twenty-third International Offshore and Polar Engineering Conference, June 30–July 5, 2013
Paper Number: ISOPE-I-13-070
... clearance south china sea buoyancy installation launch simulation mudmat coefficient rocker arm clearance compartment variation enhanced recovery launch barge stability Design and Operation Considerations for Large Jacket Installations in South China Sea Changsheng Yu,(1) Zhigang Li,(1...
Proceedings Papers

Paper presented at the The Twenty-second International Offshore and Polar Engineering Conference, June 17–22, 2012
Paper Number: ISOPE-I-12-622
... load prediction investigation experimental investigation compressibility free surface computation inclination fluid dynamics consequence equivalent porosity model pressure peak mudmat upstream oil & gas CFD and Experimental Investigations of Slamming Load Prediction on Subsea...
Proceedings Papers

Paper presented at the The Twenty-first International Offshore and Polar Engineering Conference, June 19–24, 2011
Paper Number: ISOPE-I-11-579
.... The heights of two driven piles are different, further reducing installation difficulty. (4) The mudmat is larger than the conventional design, making the installation of new structure is more stable; (5) The construction process has little effect on existing platform s production and living facilities...
Proceedings Papers

Paper presented at the The Sixteenth International Offshore and Polar Engineering Conference, May 28–June 2, 2006
Paper Number: ISOPE-I-06-252
... ABSTRACT The current "standard" code methods of analysis of mudmats (e.g. API, DnV) use the concept of stability envelopes to determine the required size of shallow foundations. This Paper reports on the recent experience of using advanced finite element techniques to optimize the bearing...
Proceedings Papers

Paper presented at the The Ninth International Offshore and Polar Engineering Conference, May 30–June 4, 1999
Paper Number: ISOPE-I-99-096
... ABSTRACT A unique temporary foundation system, which combined skirted mudmats with an air lift system, was used during the installation of two fixed offshore platforms. The skirts on the mudmats allowed the use of active suction to penetrate the mats. To optimize simplicity, reliability...
Proceedings Papers

Paper presented at the The First International Offshore and Polar Engineering Conference, August 11–16, 1991
Paper Number: ISOPE-I-91-020
... ABSTRACT This paper presents a new technique by which considerable saving on the mudmat of an onshore platform jacket could be achieved. By attaching a dilatable / flexible diaphragm close to the driven end of the lead pile section, the load transferred to the mudmat due to this pile...

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