Pile soil interaction mechanism testing device for riser

Abstract

The invention relates to a pile soil interaction mechanism testing device for a riser, which comprises a sealed cylinder, a sealed cover, an electric piston hoisting machine force transducer, a testing conduit, a plurality of strain force transducers, a liquid pressure gauge, a hydraulic pump and a control device, wherein the electric piston hoisting machine force transducer is connected with the testing conduit through a transverse lever and transmits the measured data to the control device; the strain force transducers are arranged at different heights at intervals on the outer wall of the testing guiding pipe which is covered by seafloor soil so as to detect the stresses on the testing conduit at different seawater depths and transmit the stresses to the control device in real time; the liquid pressure gauge is used for transmitting the acquired pressure information on the upper part of liquid to the control device in real time; the output end of the hydraulic pump is connected with a water inlet on the sealed cover through a hydraulic transmission pipe; the control device is electrically connected with the control end of the hydraulic pump; and a liquid pressure threshold computing module and a friction factor computing module for the control device to control the water depth in the sealed cylinder are pre-arranged in the control device. The testing device can measure the action mechanism between the riser and the seafloor soil conveniently, quickly and accurately, and the reliability of the result is high.

Description

technical field [0001] The invention relates to a pile-soil interaction mechanism test device for a water-resisting conduit, in particular to a pile-soil interaction mechanism test device for a water-resisting conduit capable of simulating different water depth conditions. Background technique [0002] In offshore oil exploration, the safety and economy of the drilling riser play a vital role in the entire oil exploration and exploitation, and the determination of the depth of the riser into the mud is one of the key technologies for the drilling riser , and the key to determine the mud entry depth of the deep sea riser is to determine the mechanism of action between the riser and the seabed soil. The mechanism of action between the riser and the seabed soil includes the relationship between the friction coefficient between the riser and the seabed soil and the water depth, the consolidation time of the seabed soil, the diameter of the riser and the properties of the seabed ...

AI Technical Summary

Problems solved by technology

At present, the mechanism of action between the riser and sand and the calculation theory of the friction between the two are not perfect, and there is a lack of relevant theoretical guidance, which brings great challenges to the determination of the mud entry depth of the deep sea riser. big difficulty

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