Underwater wellhead system load test device and test method thereof

Abstract

The invention discloses an underwater wellhead system load test device and a test method thereof. A portal frame is arranged above a foundation pit, a horizontal slider is mounted on a crossbeam of the portal frame, a vertical motion aid is mounted on the horizontal slider, and a horizontal motion aid is mounted on one side of the horizontal slider. A simulated underwater wellhead guide pipe pile is arranged in the foundation pit, and a simulated wellhead system is fixed in the portal frame through the guide pipe pile. The top end of a marine riser of the simulated wellhead system is hinged to the bottom end of the vertical motion aid, and the bottom of the marine riser is spherically hinged to a blowout preventer of the simulated wellhead system. Circulating load of drifting of a drilling ship or platform, movement of the marine riser and the like and tensile force of the marine riser under the action of load of marine environment can be simulated by the test device, and the rule of influences of various factors on stability of an underwater wellhead and bearing capacity of guide pipes and sensitivity are revealed.

Description

Technical field [0001] The invention relates to a simulation test device, in particular to a test device that simulates the stability of an underwater wellhead system for deep-water drilling. Background technique [0002] 90% of the undiscovered offshore oil and gas reserves in the world are lurking in the stratum with a water depth of more than 1000m, so the level of deepwater drilling technology is related to the pace of deep-sea oil and gas exploration and development. For marine deepwater drilling engineering, drilling environment conditions become more complicated with the increase of water depth, and technical problems that are difficult to overcome by conventional drilling engineering are prone to occur. Therefore, the development of deepwater drilling technology is an important factor affecting future oil development. [0003] At present, the underwater wellhead system used in deepwater drilling is generally composed of drilling riser, blowout preventer and wellhead. The fo...

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Problems solved by technology

2) How to fix the catheter safely and effectively

3) If the running depth of the conduit is too shallow, it may cause accidents such as casing string subsidence and instability; if the running depth is too large, it will cause economic waste

[0005] Although the relevant foreign literature has proposed the stability problem of the wellhead, but has not established a theoretical analysis method for this problem

At the same time, since the dynamic response of marine environmental loads to the riser directly acts on the underwater wellhead and the casing string below it, it is necessary to study the influence of dynamic factors on the wellhead stability, and there is no relevant literature report on this aspect

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