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利用比重大于正常压井泥浆比重的泥浆压井,可以降低套压及地层所受的压力,是防止地下井喷的一种有效手段。本文给出了确定超重泥浆比重及用量的方法,推导和研究了立管压力的计算公式和变化规律。
It is an effective way to prevent the underground blowout by using the mud kill that has a larger specific gravity than that of the normal kill mud to reduce the pressure of casing pressure and formation. This paper gives a method to determine the specific gravity and dosage of overweight mud, derives and studies the calculation formula and variation rule of riser pressure.