A method of contemporaneously constructing more than one semi-submersible rig using transverse skidding

A technology of drilling platform, level height, applied in the field of construction of marine buildings

Active Publication Date: 2009-02-18
JURONG SHIPYARD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, this method only allows for the construction and assembly of one semi-submersible rig at a time

Method used

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  • A method of contemporaneously constructing more than one semi-submersible rig using transverse skidding
  • A method of contemporaneously constructing more than one semi-submersible rig using transverse skidding
  • A method of contemporaneously constructing more than one semi-submersible rig using transverse skidding

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with specific drawings. Figures 1-3 show the general arrangement of the shipyard area including the dry dock 4 where two semi-submersible drilling rigs of the present invention are constructed and combined. As shown in Fig. 2 and Fig. 3, the first semi-submersible drilling platform is composed of a first upper hull 1a and a first lower hull 2a. During construction, the first upper hull 1 a is supported by sliding trusses 3 located on land adjacent to the dry dock 4 . The sliding trusses 3 are designed to slide the completed upper hull 1a on the longitudinal sliding beams 5 using longitudinal sliding shoes 6 during the load-out operation.

[0027] As shown in FIG. 1 , the longitudinal sliding beam 5 extends parallel to the longitudinal axis of the sliding truss 3 . The detailed configuration of the unloading and bonding operations is further disclosed in detail in the previous International Publicatio...

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Abstract

A method of constructing two (or more) semi-submersible rigs simultaneously in a shipyard and completely assembling the rigs sequentially at the shipyard is disclosed. Two upper hulls of separate rigs are constructed side by side on land next to a dry dock, where the lower hulls are constructed. The first upper hull is then skidded longitudinally to a position above the first lower hull. The lower hull is floated by flooding the dry dock, and position of the lower hull is adjusted using the ballast tanks of the lower hull. Once the upper hull and the lower hull are aligned, they are permanently welded together, completing the first rig assembly in the dry dock. Concurrently, the second upper hull is then skidded transversely to the load-out position and subsequently jacked up to the required height. It is resting on the skidding truss after the truss is pulled back from the first rig's mating location. The load-out and mating operation is then repeated to assemble the second semi-submersible rig in the dry dock.

Description

[0001] Application related information [0002] This application is partly a continuation of our application number NO.200306086-0 filed on October 7, 2003, titled "A Method of Using Dry Dock Combined with Construction of a Half-submersible Vehicle", the application document All publications are hereby incorporated by reference and claim priority. technical field [0003] The present invention generally relates to the construction of marine structures, and in particular to a method for simultaneously constructing two (or multiple) semi-submersible drilling platforms in a dry dock in a shipyard. Background technique [0004] Due to the trend of increasing energy demand, oil prices may continue to rise in the foreseeable future, and exploration will increase significantly. A strong drive to explore in deep water will be key to ocean activity, meaning there will be a need for significant new construction of semi-submersible drilling rigs. From a shipyard's point of view, shor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B63B9/06
CPCB63B9/065B63B73/43B63B77/00E21B15/003E21B15/02B63C3/04
Inventor 萧丹枫吴金桂钟岿林添发
Owner JURONG SHIPYARD
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