Water-secluding pipe mechanical behavior testing system and method based on coupling effect of marine environment and drilling conditions

Abstract

The invention discloses a water-secluding pipe mechanical behavior testing system based on a coupling effect of a marine environment and drilling conditions. A water pump (21), a light source (1), a camera A (3) parallel to the water flow direction, a contrast board A (5) parallel to the water flow direction, a camera B (4) perpendicular to the water flow direction and a contrast board B (6) perpendicular to the water flow direction are installed on the outer wall surface of a pool (2), a motor supporting frame (9) is arranged on a tension supporting board (17), and an upper connecting structure, a water-secluding pipe (8) and a lower connecting structure which are connected in sequence are arranged between the motor supporting frame (9) and the bottom of the pool (2) from top to bottom. The invention further discloses a testing method. The water-secluding pipe mechanical behavior testing system and method have the advantages that mechanical behaviors of the water-secluding pipe can be comprehensively, accurately and really simulated under the coupling effect of the deep sea drilling conditions and the marine environment, and the system can simulate the marine environment, apply tension to the top of the water-secluding pipe, simulate rotation of drill strings different in rotating speed and apply different magnitudes of bit pressure.

Description

technical field [0001] The invention relates to a riser mechanical behavior test system and a test method based on the coupled action of marine environment and drilling working conditions. Background technique [0002] The South China Sea is rich in oil and gas resources, with geological reserves of 30 billion tons, about 70% of which are stored in the deep sea. The strategic goal of my country's future oil and gas exploration and development will shift to the deep sea. In the exploitation of deepwater oil and gas resources, apart from the drilling platform, the riser is also very important. The riser is the key equipment connecting the platform and the subsea blowout preventer. In the process of deepwater drilling, drilling tools and drilling fluid have to pass through the riser with a water depth of several thousand meters. Under the coupling effect of the two, the riser is prone to failure, which affects the safety of deepwater drilling. Therefore, it is of great signi...

AI Technical Summary

Problems solved by technology

As mentioned in the patent, in the experiment process, a trailer drags the standpipe model to simulate the uniform incoming flow. This method is easier to control the flow rate accurately. When the inertial force disturbs the flow field greatly and the experimental device does not consider the fluid flow inside the riser model, adding the drill string model, and

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