肯尼亚OLKARIA地热井空气泡沫流体定向钻井综合技术研究

定向钻井技术是在石油钻探中发展起来的,以后引用到地热钻井中来。肯尼亚地热井中由于地层漏失严重,须采用空气泡沫钻井方式,而井下温度又高,这对于地热井定向钻井技术是一种挑战,需要解决钻速低、井眼轨迹控制难度大、地热井测斜工具与方法、耐高温马达等困难,通过长城钻探公司在肯尼亚所打地热井的实践,成功地解决了以上难题,缩短了钻井周期,节约了钻井成本。

Stduy on Geothermal Well Directional Drilling with Air Foam in Kenya Olkaria

Directional drilling is developed from petroleum drilling,then is applied in geothermal drilling.Due to circulation loss,air foam should be applied;additionally the bottom hoel temperaure is high,these factors bring a chanllenge to directional drilling geothermal well.Several difficulties should be settled,such as:the low drilling rate,the difficult to control hole track,the survey method & tool applied in geothermal well,the motor resisting high temperature.GWDC have drilled several geothermal wells succes...