Screw bolt type continuous lifting system and screw bolt type continuous lifting method for offshore platform

Abstract

The invention discloses a screw bolt type continuous lifting system and a screw bolt type continuous lifting method for an offshore platform. The screw bolt type continuous lifting system comprises apile fixing chamber, a pile leg and a lifting unit, wherein the lifting unit comprises a first lifting device, a second lifting device, a third lifting device and a fourth lifting device; the first lifting device and the third lifting device are respectively arranged in two opposite first guide grooves of the pile fixing chamber; the second lifting device and the fourth lifting device are respectively arranged in another two opposite guide grooves of the pile fixing chamber. According to the screw bolt type continuous lifting system for the offshore platform, screw type lifting is realized byadopting the first lifting device, the second lifting device, the third lifting device and the fourth lifting device of which maximum stroke is sequentially reduced; the distribution of pin holes in four lines of pin hole groups of the pile leg is consistent; the pile leg is simpler and general in processing; the first lifting device, the second lifting device, the third lifting device and the fourth lifting device are arranged on the same horizontal plane, so that higher accuracy and reliability in control are realized.

Description

technical field [0001] The invention relates to the field of self-elevating offshore platform lifting systems, in particular to a screw bolt type continuous lifting system and a lifting method for offshore platforms. Background technique [0002] All offshore work platforms need to use a lifting mechanism to drive the legs of the platform to move up and down to realize the lifting of the offshore work platform. When the offshore operation platform reaches the working position, lower the pile legs, lift the offshore operation platform to the specified height on the sea surface and then ballast, so that the pile legs are firmly positioned on the seabed; when the operation is completed and return to the voyage, lower the offshore operation platform to the sea level , pull out the legs, and keep the legs up during the return voyage. In order to save the lifting time, some existing offshore work platforms have changed from the original intermittent pin lifting method to the spir...

AI Technical Summary

Problems solved by technology

In order to save the lifting time, some existing offshore work platforms have changed from the original intermittent pin lifting method to the spiral continuous lifting method, but the existing spiral continuous lifting needs to use pile legs with spiral distribution of pin holes or a lifting unit It is built on a helical surface, the processing of the legs is difficult, the lifting stroke of each lifting device is different, the lifting control is difficult and prone to errors, and when one of the lifting devices fails, the legs cannot be lifted and lowered, reliable poor sex

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