Mat Supported Jackup

Mat supported jackup rigs often experience mat penetrations approaching the thickness of the mat in soft soil penetrations approaching the thickness of the mat in soft soil areas.

Mat supported jackup.

The mat is carried just under the hull during mobilization usually with 5 ft gap. However while these equations deal with bearing capacity for shallow mats and strip footings the designer is left with uncertainties as to how to treat mats with large cut outs and fingers around the mat slot. The operating procedure involves floating the platform to the desired location and then jacking the mat toward the seafloor until the drilling platform is entirely supported by the mat. Mat type jackup unit the mat type jackup also usually consists of three legs that are cylindrical and are from 8 to 12 ft in diameter fig.

The mat supported type is relatively cheap compared to the independent legged type. Www jeffweber eu we would like to. Mat supported jack up foundation on soft clay overturning storm stability this paper is in regards to the maleo producer a mat supported jack up converted to a mopu mobile offshore production platform located in a seismically active offshore region of indonesia. A more logical choice for drilling environments that have soft floors mat supported jackups distribute the weight of the rig across the ocean s bottom like a snow shoe.

A type of mat supported jack up rig where all the legs are connected to one common footing since the legs of the mat supported jackup are merely resting on the seafloor the support they provide is more susceptible to failure. Stewart technology associates undertook a large role in jack up analysis and design related to the structures stability and. Selling an older mat supported jack up offshore drilling rig. Jack up unit with the leg s rigidly connected by a foundation structure such that the leg s are raised and lowered in unison.

Usually shaped like an. Mat supported jack up rigs consist of three or more legs that are connected at their lower ends to a large horizontal mat. I want to buy. Iso 19905 1 202 petroleum and natural gas industries site specific assessment of mobile offshore units part 1.