φ127 mm涡轮钻具在干热岩钻井取心钻进中的试验研究

Experimental Research on the Application of 127mm Turbodrill in Hot Dry Rock Core Drilling

摘要:

干热岩地层以火成岩为主，地层温度高，可钻性差。为解决干热岩钻探机械钻速低、钻具磨损严重等问题，针对干热岩特点研制了一套耐高温φ127 mm涡轮钻具，并在福建省漳州市干热I井进行了试验，试验井段平均机械钻速与φ165 mm螺杆配合金刚石钻头相比提高了30.3%，与转盘配合牙轮钻头相比提高98.5%。试验结果表明，该φ127 mm涡轮钻具结构设计合理，能够满足干热岩高温钻探的需要。

Abstract:

The hot dry rock resource is mainly made up of volcanic with high temperature and poor drillability. In order to resolve the difficulties of low drilling speed and serious drilling tools wear, a set of φ127mm high-temperature turbodrill is designed and manufactured, which was tested in a hot dry rock well, the ROP were increased by 30.3% and 98.5% compared with φ165mm PDM + diamond bit and rotary table matching cone bit respectively. The experiment results show that this φ127mm turbodrill has reasonable structure design and is suitable for the high-temperature hot dry rock drilling.