The Calculation Method and Experimental Research on Throttling Pressure Drop during Kill a Well

Abstract:

There is a common problem during kill a well, which is how to quickly and accurately control the surface casing pressure according to the requirements for killing a well. A step-by-step exploration process is employed on operation sites. Continuously adjusting throttle valve to acquire surface casing pressure may lead to failure of kill operation because of its long time and low control accuracy. Obviously, if the calculation problems of throttling drawdown can be resolved,the relationship between drawdown and throttle valve opening can be found and the course of explorating can be converted into a straight course.Then the success rate of killing well can be improved. More importantly, this can make automatic controll of surface casing pressure possible. The paper built the calculation method of throttling pressure drop by theoretical analysis and verified the calculation method by adopting it into field test. The result has showed that the calculation method of throttling pressure drop coincides with experimental results and it can be used in engineering practice.

• Periodical: Applied Mechanics and Materials (Volumes 229-231)
• Pages: 495-498
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.229-231.495
• Online since: November 2012
• Authors: Hui Xin Liu, Xian Min Yang, Cheng Tao Li, Xiang Cheng
• Keywords: Kill Operation, Pressure Control, Throttle, Throttling Pressure Drop

References

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