Well-drilling safety intelligent monitoring method and well-drilling safety monitoring alarming device

Abstract

The invention discloses a well-drilling safety intelligent monitoring method for monitoring liquid flow speed at an outlet of an overflow pipe and alarming while achieving an alarming condition. According to the well-drilling safety intelligent monitoring method, the well kick or well leakage dangerous case can be timely detected in the early days. The monitoring on the liquid flow speed is in real time, so that the misinformation situation as a mud tank is avoided and the safety stability is increased. The invention also discloses a well-drilling safety monitoring alarming device which comprises an outlet flow meter utilizing a sonar sensor to monitor the liquid flow speed at the outlet. Due to the non-contact property of the sonar sensor, the stability of the work of the outlet flow meter is ensured, the conditions, such as fault operation, caused by the blocking of the mud slurry are avoided, and the stability of the well-drilling safety monitoring alarming device is increased.

Description

technical field [0001] The invention belongs to the field of petroleum and natural gas exploration and production, and in particular relates to a method for intelligently monitoring the safety of drilling mud by using a sensor and a device for monitoring and alarming drilling safety. Background technique [0002] Existing drilling mud liquid level monitoring methods, such as the disclosed "method and system for tripping and tripping mud automatic injection" disclosed by the Chinese Patent Office Publication No. Method", one is to automatically monitor the fluid volume and total fluid volume of the mud tank in the drilling cycle, and when the fluid volume increases and decreases continuously exceeds the set value by 2m 3 The second is to monitor whether there is mud at the outlet of the overflow pipe of the drilling cycle, and to perform early warning of well leakage when the drilling circulation mud has no liquid flow, and to perform an early warning of well leakage at t...

AI Technical Summary

Problems solved by technology

[0003] The problem with the above method is: firstly, this method does not monitor and alarm the mud outlet flow, but only alarms by monitoring the liquid volume in the tank

During the drilling mud circulation process, the blades of the flowmeter and the rotating shaft will stick to the sediment, and the mud cake will thicken and dry for a long time, which will affect the accurate measurement, and even cause the blades to stick and cause the flowmeter to fail, thus causing the monitoring system to lag or fail. , with potentially catastrophic consequences

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