Riser safety monitoring system and method in soft suspension state

Abstract

The invention relates to a riser safety monitoring system and method in a soft suspension state. The system includes a riser stress and strain monitoring system, a top flexible joint inclination monitoring system, a laser interference monitoring system, an information fusion center and a platform control center; platform control When there is a typhoon or other dangerous situation near the platform, the center sends a typhoon warning command to each monitoring system; the stress and strain monitoring system of the information riser measures the stress and strain parameters of the riser in real time; The joint deflection parameters are measured in real time; the laser interference monitoring system is used to measure the riser center offset parameters in real time; the information fusion center compares each real-time measured value with the parameter warning value, and when it is greater than the parameter warning value, the warning information is sent to Platform control center; the platform control center adjusts the speed and direction of the platform. The invention can be widely used in the field of oil pipeline monitoring.

Description

technical field [0001] The invention belongs to the field of oil pipeline monitoring, and relates to theories of sensor measurement, underwater signal detection, underwater acoustic signal wireless transmission, etc., in particular to a riser safety monitoring system and method in a soft suspension state. Background technique [0002] During drilling operations, the riser connects the drilling ship (or floating drilling platform) to the subsea wellhead. When encountering a typhoon, the drilling ship sometimes cannot continue to stay in place. Such as figure 1 As shown, if the typhoon path can be accurately predicted in advance, the riser can be disconnected from the connection between the bottom riser assembly (LMRP) and the wellhead blowout preventer (BOP) and recovered on the upper deck, and then the drillship can be driven to a safe area. However, in ultra-deep waters, it will take several days of drilling time to recover the riser as a whole before the typhoon and reco...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned problem of safety monitoring of soft-hanging risers in deepwater drilling during typhoons, the purpose of the present invention is to provide a safety monitoring system and method for risers in a soft-suspension state, which can solve various dangerous situations such as typhoons when the riser is in soft-suspension. Real-time monitoring of status and safe evacuation

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