Around synchronization hydraumatic jacking process of upper module of ultra-large marine oil platform

Abstract

The invention discloses an around synchronization hydraumatic jacking process of upper module of an ultra-large marine oil platform. The around synchronization hydraumatic jacking process comprises the following steps of: step 1, arranging a jacking and supporting mechanism at the bottom of each landing leg; step 2, controlling a jacking device to jack a set height journey, supporting an upper structure by virtue of a radial arm, and enabling a jacking device to retract; step 3, enabling a support beam slippage rail to enter a position below the upper structure; step 4, the jacking device supports jacking the set height journey by virtue of the jacking device, rotating the radial arm to support the upper structure, and enabling the jacking device to retract; step 5, enabling a next group of support beam slippage rails to enter the lower part of the support beam, enabling the jacking device to retract, and jacking the upper module for a set height; step 6, repeating the step 3, the step 4 and the step 5 until jacking the upper module to a preset height; step 7, transporting a lower structure to the bottom of the upper module; step 8, enabling the jacking device to retract, and connecting the upper module and the lower structure in a butt joint manner; and step 9, unloading and dismantling auxiliary equipment. The jacking process provided by the invention can realize the multipoint and around synchronization jacking of the upper module and can be used for carrying out effective control on the lifting speed and the displacement precision.

Description

technical field [0001] The invention relates to a jacking process for a large structure, in particular to a circulating synchronous hydraulic jacking process for the upper block of an ultra-large offshore oil platform, which belongs to the field of offshore oil engineering. Background technique [0002] The development of offshore oil and gas resources requires a certain number of offshore oil platforms. There are two main types of offshore oil platforms: fixed platforms and floating platforms. [0003] A fixed offshore oil platform generally includes: an upper module and an underwater fixed support structure. This type of offshore oil platform is generally built separately on land with the upper module and the underwater fixed support structure, and adopts the float-over method for offshore installation operations. During the shipping of large topside modules it is often necessary to arrange a substructure between its lower part and the deck of the ship. For a floating p...

AI Technical Summary

Problems solved by technology

[0005] 1. Increased the number of cranes used on the construction site and the difficulty of crane operations, especially the need to increase the number of times that large cranes are used;

[0006] 2. Increased the overall size and precision control difficulty of the upper block;

[0009] 5. The construction of the upper block can only be carried out after the completion of the lower structure, which is not conducive to the control of the construction period

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