关键词: 压力源, 封井器试压, 事故后果, 风险对比

Abstract: In order to study the effects of three common pressure sources (test pump, cementing unit, mud pump) on the accident consequences in case of physical explosion during pressure test of blowout preventer, this paper takes a certain accident as an example and carries out quantitative calculation of the explosion energy produced by different pressure sources including the released total energy, the explosion equivalent, the initial flying velocity and hazard radius of the debris, the initial velocity of liquid jet, the jet hazard radius and so on. The results indicate that once an explosion occurs during the pressure test, the energy released by the mud pump during the pressure test is the largest; that by the pressure test pump is the smallest and that by the cementing unit is in between. The reason is mainly related to the volume of the access system. Therefore, when performing pressure test operations on site, the method with the smallest system volume should be selected. The pressure test pump is the first choice, followed by the cementing truck and the use of mud pumps is not recommended.

Key words: pressure sources, pressure test of blowout preventer (BOP), accident consequence, risk comparison