Construction method for stabilizing piercing of jack-up platform spud can

Abstract

The invention relates to a construction method for stably puncturing a spud shoe of a jack-up platform, comprising the following steps: a. Location of the spud shoe: using communication equipment to locate the spud shoe in an offshore oil field, and confirming the heading of the jack-up platform and the spud shoe position; b drilling and grouting: drill a circle around the spud can position determined in step a, and inject cement slurry to form a cement sheath; c jack-up platform in place: place in place according to the pre-surveyed position , adjust its heading, and confirm that the spud can position in step a matches the drilling and grouting position in step b; d. into the seabed until the spud cans are seated on the cement sheath of step b. The construction method of the invention avoids the phenomenon of puncture of the spud shoes of the self-elevating platform, can increase the running speed during the running of the spud shoes, and can improve the efficiency of on-site operations.

Description

technical field [0001] The invention relates to a construction method for stable puncturing of self-elevating platform pile shoes, belonging to the technical field of offshore oilfield exploitation. Background technique [0002] The self-elevating platform has pile legs that can be lifted freely. During operation, the pile legs extend to the seabed, stand on the seabed, use the pile legs to hold up the platform, and make the bottom of the platform a certain distance from the sea surface, so as to avoid sea waves and currents. The influence of the platform, the work can be carried out on the platform. Due to the unique way jack-up platforms are driven into the mud, there is also a specific risk during platform placement – ​​the risk of piercing of the stilettos. [0003] In order to avoid the risk in the process of placing the similar pile boots, it is particularly important to analyze the special stratum and formulate construction methods and construction techniques to prev...

AI Technical Summary

Problems solved by technology

However, this technology has the following disadvantages: 1. The spud cans are above the hard ground, and because there is a soft mud layer below the hard ground, the stability is very poor and there is a high risk; Hard strata that may be punctured. When the hard stratum cannot reach the required bearing capacity of the spud cans, the spud cans will also puncture, resulting in platform instability

This technology has the following disadvantages: 1. The drilling area is too large, the operation is difficult, the cost is extremely high, and the effect is not significant; 2. The spud shoe piercing process is unstable, and the three pile legs cannot be pierced at the same time. It is also very easy to cause the platform to tilt, which may easily cause equipment damage or personal injury

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