Testing device and method for mechanical and fluid flow performance of pipe-in-pipe system

Abstract

The invention belongs to the technical field of pipe column mechanical test simulation, and relates to a testing device and method for the mechanical and fluid flow performance of a pipe-in-pipe system. A test barrel is hermetically welded on a base; an outer pipe is arranged in the test barrel in a threaded manner through an outer pipe adapter substitute which is fixedly arranged on the base; a top cover is hermetically arranged on the test barrel on the top of the outer pipe through a fixing bolt; the outer pipe is hermetically and fixedly connected with the top cover through a chuck; an inner pipe bracket is arranged on the test barrel above the top cover through a fixing bolt; and an inner pipe is arranged in the outer pipe. Through adoption of the testing device and method, the outerpipe is subjected to water current impact and the vibration behavior under the condition that fluid flows in the inner pipe; the influences of different pipe column combinations, water current magnitude and the water current acting depth on the pipe columns can be realized; and the powerful technical guarantee is provided for deep-water and ultradeep-water pipe-column operation safety.

Description

technical field [0001] The invention belongs to the technical field of pipe string mechanical test simulation, and relates to a "pipe-in-pipe system" mechanical and fluid flow performance testing device and testing method. Background technique [0002] String testing is an essential part of oil and gas exploration and development, and its main purpose is to accurately evaluate the fluid properties of deep-sea formations and the potential production of wells to be put into production before or at the initial stage of oil and gas reservoir production. During the test, there is formation oil and gas flow inside the test pipe string, well fluid exists between the test pipe and the riser, and there is the impact of water flow outside the riser. Due to the severe environmental loads on the pipe string under the action of seawater, the fluid action on the inside and outside of the test pipe string, and the interaction force between the pipes in the "pipe-in-pipe system", the perfor...

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Problems solved by technology

At present, most studies in this area use finite element analysis, and there are few studies on the influence of real seawater environmental loads, oil and gas loads, and interaction between pipes and pipes on pipe strings. Existing experimental methods cannot fully simulate pipe strings. The influence between pipe and pipe, marine environmental load and the influence of oil and gas on pipe string cannot provide effective guarantee for the safety assessment of "pipe-in-pipe system"

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