方钻杆旋塞阀在压差作用下转动困难,影响井控安全。消除压差尤为重要。研制新型测压式方钻杆旋塞阀精确测量钻柱内压力,实现压力平衡。该旋塞阀既可以实现常规旋塞阀功能,还可以进行测压,更好的满足钻井井控要求。通过实验分析,证实新型测压式方钻杆旋塞阀可以精确测量压力,具有较好的应用前景。 Square drill plug valve under pressure differential rotation difficult, affecting well control safety. Elimination of pressure is particularly important. Development of a new type of pressure-type square drill plug valve accurately measure the pressure inside the drill string to achieve pressure balance. The plug valve can not only achieve the conventional plug valve function, but also for pressure measurement, and better meet the drilling well control requirements. Through experimental analysis, it is confirmed that the new pressure-measuring square-pipe plug valve can accurately measure the pressure and has a good application prospect.