Evaluation method for the influence of jack-up drilling ship's pile insertion on the pile foundation adjacent to the jacket platform

Abstract

The invention relates to a method for evaluating influence of self-elevating drilling ship pile pitching on an adjacent jacket platform pile foundation. The method comprises the steps of 1, determining the uniform equivalent elasticity modulus of a soil layer on one side of a jacket pile; 2, building a three dimensional structure analysis model and a three dimensional elastic-plastic finite element CEL (Couple Eulerian-Lagrangian) model and setting an elasticity modulus; 3, determining angles of environmental parameters; 4, determining UC value distribution of a pile body, pile head force and pile head displacement data under the environmental load effect; 5, determining the pile body displacement of the jacket pile foundation under the pile pitching squeezing effect; 6, building a pile soil non-linear footing beam module and calculating pile body internal force; 7, programming under MS EXCEL according to design codes in oceaneering to obtain the UC value distribution of the pile body under the action of the squeezing effect; 8, determining the UC value of the pile body under the coupling of the environmental load effect and the squeezing effect; 9, checking the UC value of the pile body under the coupling condition; 10, analyzing the jacket pile foundation; 11, checking the analysis result and judging whether the design requirement is met or not.

Description

technical field [0001] The invention relates to an evaluation method in the field of offshore oil development, in particular to an evaluation method for the impact of jack-up drilling ship pile insertion on pile foundations adjacent to jacket platforms in the offshore oil development process. Background technique [0002] The jack-up drilling ship is a special marine engineering equipment used for drilling and completion operations in offshore oil development, and is suitable for sea areas with a water depth of up to 120m. In the development of oil and gas fields with a water depth of 100 meters, compared with the scheme of setting up modular drilling rigs or workover rigs on newly built platforms and the scheme of using semi-submersible drilling ships for drilling operations, the scheme of using jack-up drilling ships generally has better economic benefits . Therefore, in recent years, jack-up drilling ships have been more and more used in the engineering schemes of my cou...

AI Technical Summary

Problems solved by technology

[0005] In view of the above problems, the purpose of the present invention is to provide a method for evaluating the impact of jack-up drilling ship pile insertion on pile foundations adjacent to the jacket platform, which solves the serious deformation of the jacket pile foundation that may be caused by the large deformation of the soil when the spud boots go deep into the mud. Distortion problem, which can be used to guide the design of platform pile foundations in engineering practice

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