Segmented crawler crane closing and hoisting technology for pile legs of jack-up offshore oil platform

Abstract

The invention relates to a process for sectionally closing and hoisting pile legs of a self-elevating offshore oil platform through a crawler crane, and belongs to the technical field of equipment hoisting processes. The crawler crane at the corresponding energy level is used for closing the pile legs; the pile legs of the self-elevating platform can be closed on land or closed after entering the sea according to the height difference and the performance parameters of the crawler crane. According to the process, the traditional construction process is changed; the construction cost is reduced; the construction safety is ensured; the construction period is decreased; the crawler crane is used for closing the pile legs, so that the construction cost can be reduced; the hoisting of the pile legs and the azimuth adjusting of the self-elevating platform are integrated and comprehensively managed, thereby accelerating the construction progress.

Description

technical field [0001] The invention relates to a process for closing and hoisting the leg of a self-elevating offshore oil platform with a segmented crawler crane, and belongs to the technical field of equipment hoisting technology. Background technique [0002] At present, my country's offshore oil exploration and development equipment has entered a period of rapid development, and the localization process of offshore oil equipment is also accelerating. After more than half a century of development, self-elevating mobile platforms have accounted for 60% of the total number of the four main offshore platforms. %. Jack-up mobile platforms play an important role in the exploration and development of marine energy. Since 1970, many jack-up mobile platforms have been built in China, and the construction technology has become increasingly mature; there are many domestic and foreign platform and hull construction experience. , In the field of self-elevating mobile platform constr...

AI Technical Summary

Problems solved by technology

[0003] 1) At present, the vertical splicing of pile legs mainly depends on the use of floating cranes above 3000t for hoisting operations. The construction cost is huge and the construction period is long. Satisfies the hoisting tasks of offshore oil platform pile legs, while the floating crane also takes into account construction tasks such as marine rescue and fixed platforms in the South China Sea, which cannot meet the growing domestic requirements for the lifting of jack-up offshore oil platform pile legs

[0004] 2) The traditional pile connection method of pile legs is offshore floating pile connection. Since the jack-up offshore oil platform pile connection method requires relatively floating pile connection, offshore floating pile connection, after the pile legs are hoisted to high altitude, due to the action of sea wind and waves, As a result, the equipment shakes violently, causing great difficulties in the aerial docking of the pile legs. It is difficult to guarantee the docking accuracy and welding quality of the pile legs, and there is a large construction risk

[0005] 3) There are many auxiliary ships and machinery for offshore floating crane hoisting, and the cost of long-distance transportation is huge. In addition, it has been monopolizing the leg hoisting market of jack-up offshore oil platforms, resulting in an increase in the construction cost of jack-up offshore oil platforms, which affects the platform to a certain extent. increase in number

[0006] 4) The offshore pile connection method is commonly used in the world, and the traditional thinking habit of pile leg hoisting has not been broken through, and the feasibility of the land pile connection method has not been considered

[0007] 5) The total height of the pile legs is over 167m. The existing domestic crawler cranes have certain deficiencies in the lifting performance of the pile legs (if the sections are not suitable), which limits the pioneering method of crawler cranes to connect piles on land to a certain extent.

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