Pipeline Stressanalysis And Pipe Handling Structures Design Of The Pipeline Plough

Accompanied by the development of marine energy development, and to keep the deep-sea submarineoil pipeline to become an important way to transport oil resources from the deep-sea oil fields to themainland, security issues highlight the growing offshore oil pipeline. Today’s mainstream method for theprotection of submarine pipelines after trenching method, complete the laying of submarine pipelines alongthe pipeline dig out a certain depth of the trench and the pipe fell into which increase the stability ofsubmarine pipelines. Pipeline plough as a simple structure, high efficiency, and adaptability of conditionsafter trenching equipment has broad application prospects. Thesis topics from Offshore Oil EngineeringCo., Ltd. hard soil trenching technology and equipment research project aims to develop a pipeline ploughwith independent intellectual property rights.Pipeline plough plow is generally designed to open and close the symmetrical split structure,operations around plow, is located above the submarine pipeline; the trailing located trencher pipe grabcrawl pipes and upgrade to the required height, placed inside the pipe roller cradles around plow closedtrenching job by job mothership traction. Pipe handing by pipe grab and pipe roller cradles, trencher placepipe crawl, release, trencher guide in the working process, and the protection of the pipeline, in the trencherentire job process only this portion of the structure with the pipe in direct contact. The trencher premise isnot allowed to cause mechanical damage of the pipeline, and has important theoretical significance andapplication value for the entire job process piping stress state and its relations with pipe handing structures.This thesis is a theoretical analysis pipeline stress state in the working process, based on the pipehanding structure design, and experimental verification. The papers main contents are as follows:Operating procedures under the pipeline plough has elevated pipeline pipeline holding structuresdesign-oriented functions. Suspended for the the pipeline holding structure crawl submarine pipelinespanning segment, the establishment of the submarine pipeline stress analysis model, using the finiteelement software to calculate the force of submarine pipeline, hanging span by analyzing the soil resistancein different stiffness of the soil surface contact point distribution of soil deformation, determine the initialoperating point of the pipeline trenching machine. Crawl submarine pipeline lifting force is based on thecompletion of the the pipeline holding structure design stress analysis and structural design, and the use offinite element software for structural strength check. To verify the operating principle of the pipelineplough, the workflow job agency action design process pipeline plough onshore test Pipelines lifting force,validation pipeline installed in pipe roller cradles load cell measurement by force Analysis.