A Platform Riser Coupled Pool Simulation Experiment System
A technology for simulating experiments and risers, which is applied in the field of simulating experimental systems and can solve the problems of difficulty in simulating external fluid loads and the inability to keep the Reynolds number consistent.
Active Publication Date: 2017-12-26
CHINA NAT OFFSHORE OIL CORP +1
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Problems solved by technology
But the difficulty lies in: (1) Simulation of the mechanical properties of the riser itself and the external fluid load it receives
Although the outer diameter, length, mass distribution, axial and bending stiffness of the riser can be treated according to the geometric similarity method according to the scale ratio, there are still some difficulties in the simulation of the external fluid load
Since the external fluid load on the riser is mainly viscous drag force, but in the tank experiment, because the fluid medium is water, the Reynolds number cannot be kept consistent. Fluid loads are simulated in different ways
Method used
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[0016] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0017] like figure 1 , figure 2 As shown, the present invention proposes a platform riser coupled pool simulation experiment system, which includes a fixed frame 2 straddling the platform moon pool 1 and a fixed support 3 fastened to the bottom of the deep well of the pool. Wherein, the center of the fixed support 3 is provided with a through hole 31, and the top of the fixed support 3 is provided with a groove (not shown in the figure). Two fixed pulleys 4 are arranged at intervals on the top of the fixed frame 2 , and a connector 5 is fastened to the fixed frame 2 between the two fixed pulleys 4 . The end of the connector 5 is connected to the upper end of a vertically arranged riser 7 passing through the moon pool 1 through a pipe body 6 . Both sides of the part near the upper end of the riser 7 are respectively connected to one end of a rope b...
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The invention relates to a pool simulation experiment system for platform marine riser coupling. The system is characterized in that the system comprises a fixed rack crossing over a platform moon pool and a fixed support seat connected to the bottom of a pool well bottom firmly. A through hole is formed in the center of the fixed support seat; and a groove body is formed in the top of the fixed support seat. Two fixed pulleys are arranged on the top of a fixed rack at an interval; a first connector is firmly connected to the fixed rack between the two fixed pulleys; the end portion of the first connector is connected to a top end of a marine riser by a first pipe body; each of two sides of the part, approaching the top end, of the marine riser is connected with one end of one rope body; and the other end of each rope body passes through one fixed pulley and is connected with a solid object in a fastening mode. A height adjusting rack is arranged in the groove body of the fixed support seat; and a hole passing ball is arranged at the center of the top of the height adjusting rack. A second connector is arranged in the through hole of the fixed support seat and is connected to the bottom of the pool well firmly; the end portion of the second connector is connected with one end of a second pipe body; and the other end of the second pipe body passes through the hole passing hole and is connected with the lower end of the marine riser by a third connector.
Description
technical field [0001] The invention relates to a simulation experiment system, in particular to a simulation experiment system for a platform water riser coupling pool. Background technique [0002] In the prior art, the riser is an indispensable engineering equipment for the offshore operation of the drilling platform. During drilling operations, the riser connects the subsea blowout preventer and the floating platform, and is used to isolate seawater, guide drilling tools and casings, and form a channel for mud circulation. The deepwater riser is a flexible rod with a large length-to-diameter ratio. It will bear a wide range of fluid loads and be affected by the movement of the upper floating platform during deepwater operations. Its role in the movement of the floating platform and the underwater wellhead cannot be ignored. For this reason, the industry has carried out a large number of numerical simulations and experimental studies on the dynamic mechanism of the float...
Claims
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IPC IPC(8): G01M10/00
CPCG01M10/00
Inventor 周建良许亮斌赵晶瑞盛磊祥
Owner CHINA NAT OFFSHORE OIL CORP