应用水力空化射流技术提高灰岩地层钻速

水力空化射流技术具有安全、可靠、效果好等特点，在石油钻井中得到了推广应用。针对伊朗Y油田中下部中硬灰岩地层可钻性差、机械钻速低的情况，试验应用了水力空化射流工具。研究了试验油田的地层强度及可钻性参数，优选了水力脉冲空化射流装置和下部钻具组合，优化了机械及水力参数。现场实钻资料表明，水力空化射流工具提高钻速明显，对中硬地层的灰岩具有良好的钻进效果。

Application of Hydraulic Cavitation Jet Technology to Improve Penetration Rate in Limestone Formation

Hydraulic cavitation jet technology is widely used in petroleum drilling for its safety and reliabiligy with good effects. According to the conditions of poor drillability and low ROP in lower part of medium hard limestone formation of Y oil field in Iran, hydraulic cavitation jet tools are tested. By the study on the formation strength of test oil field and the drillability parameters, hydraulic pulsed cavitation jet device and BHA were selected; the mechanical and hydraulic parameters have been optimized. The real drilling data indicate the obvious improvement of hydraulic cavitation jet drilling tool, which is good for drilling in medium hard limestone formation.