Self-elevating ocean platform pile shoe pile jetting system capable of preventing jetting pipeline from being blocked

Abstract

A self-elevating ocean platform pile shoe pile jetting system capable of preventing a jetting pipeline from being blocked comprises a pile shoe, a shell of the pile shoe is composed of an upper top plate, a lower bottom plate and side plates, a circle of upper pile jetting holes are formed in the upper top plate at intervals, two circles of lower pile jetting holes are formed in the lower bottom plate at intervals, the outer sides of each upper and lower pile jetting holes are each provided with a closed type pile jetting nozzle, the nozzles are fixed to the upper top plate and the lower bottom plate in a welded mode, and water inlets of each circle of pile jetting holes are communicated with a pump set water outlet pipe through the jetting pipeline. By reasonably arranging the pile jetting holes and water outlets, the actual positions of jetting points are deeper than the lower bottom plate of the pile shoe, the extensionality is higher, a pile foundation soil body structure can be more effectively damaged, the adsorption capacity effect is restrained, the pile jetting holes are reasonably converted into the multi-directional water outlets with the smaller diameter, the effective jetting pressure is higher, and the pile jetting efficiency is higher; by adopting the closed type pile jetting nozzles, and then the problem that the jetting pipeline is blocked by seabed sediment is effectively solved by taking multistep progressive anti-blocking measures.

Description

technical field [0001] The invention belongs to the technical field of offshore platforms, and in particular relates to a self-elevating pile shoe flushing system for offshore platforms that prevents pile flushing pipelines from being clogged. Background technique [0002] In the exploration and development of offshore oil and gas resources, jack-up platforms are widely used and occupy the main force. The jack-up platform is a mobile offshore platform that can be used for offshore oil drilling, workover, oil testing and production testing. It has the advantages of flexible movement, good stability, and low daily rent. It usually needs to operate in different sea areas. Carry out operations such as inserting piles and pulling piles. [0003] The jack-up offshore platform inserts the spud legs and spud cans into the seabed at a certain depth through ballasting to provide the required bearing capacity of the platform and ensure the safety of the platform operation. When the o...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problems that the pile flushing system of the existing self-elevating offshore platform pile shoes often has poor pile flushing effect and difficult pile extraction due to the blockage of the pile flushing pipeline, the purpose of the present invention is to provide a self-elevating type that prevents the pile flushing pipeline from being blocked. Offshore platform spud shoe flushing system has the characteristics of simple structure, easy operation and high efficiency

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