Deepwater drilling riser state monitoring system and working method thereof

Abstract

The invention discloses a technique for monitoring riser states in real time during deepwater oil development, belongs to the field of marine oil development, and relates to a deepwater drilling riser state monitoring system and a working method thereof. A riser provided with an information acquisition nipple comprises a riser body and the information acquisition nipples mounted on the riser body. Pressure sensors used for measuring water pressure values, electronic compasses used for measuring geographic orientation values and temperature sensors used for measuring water temperature are arranged in each information acquisition nipple, stress strain gauge devices for monitoring variation of stresses and a CPU (central processing unit) processing module for information processing are attached to the inner wall of each nipple, and signal transmission modules can transmit information outwards. Sea bed base stations and signal collectors can receive and transmit signals from the signal collection nipples as well as transmit the signals to a signal collection processing and controlling center. The riser provided with the signal collection nipples can effectively monitor self states during drilling, and capability of the riser for dealing with deepwater complex environments is improved.

Description

technical field [0001] The invention relates to a working method for real-time monitoring of the state of a water riser during offshore oil development. Background technique [0002] In today's society, energy has become the main lifeline of a country's development, and oil, known as "black gold", as a non-renewable resource, is one of the most important energy and strategic materials in the world. According to the forecast of relevant agencies, oil and natural gas will maintain its important position in the next fifty years. Since the 1990s, with the rapid growth of the national economy and the gradual reduction of domestic onshore oil exploration and development, oil shortages have occurred. It has become a serious problem that restricts economic development and affects people's lives, which will lead to the continuous development of oil exploration in the direction of oceans with rich oil and gas reserves in the future, and deep-sea drilling platform technology will play ...

AI Technical Summary

Problems solved by technology

[0004] The riser system faces complex challenges from various aspects in the marine environment. When the ocean current flows through the system, it will be subjected to large drag force and lift force, which will cause the riser to deform continuously and cause structural fatigue damage; when the vortex of the riser falls off When it is close to its own natural frequency, it will produce a vortex induced resonance phenomenon that remains unchanged in a large flow velocity range. Under the action of this continuous resonance, the pipe structure such as the riser will be unstable or fatigued. Then affect offshore oil and gas exploration operations, and even cause serious engineering and environmental accidents

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