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| Technology of deviation control and drilling fast by decelerating turbine in superdeep wells |
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JIANG Jinbao1,2, SUN Xue1, ZHAO Guoshun3, DONG Weizhe4, WANG Jiachang1, WANG Huiwen1
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(1.Drilling Engineering ＆ Technology Institute, Zhongyuan Petroleum Exploration Bureau, Puyang 457001, China;2.College of Petroleum Engineering in China University of Petroleum, Beijing 102249, China;3.The Third Drilling Company, Zhongyuan Petroleum Exploration Bureau, Puyang 457001, China;4.Tarim Drilling Company, Zhongyuan Petroleum Exploration Bureau, Korla 841000, China)
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| Abstract: |
| The problems of low penetration rate of superdeep slim hole drilling and difficulty of deviation control seriously restrict the development of deep reservoirs in Western China. By analyzing the domestic research and application of deviation control and drilling fast technology, the decelerating turbine drilling technology to control deviation and increase drilling speed was introduced. And then, small size decelerating turbine tools were developed. The results of field testing show that the decelerating turbine compound drilling technology has obvious effect on increasing drilling speed. The experimental well TH12509 was drilled by decelarating turbine compound drilling tools, whose drilling rate is increased by 90％-150％ compared to rotary drilling of adjacent section, and by 1.2-1.7 times compared to adjacent well. The deviation angle decreases from 2.66°(5.89 km) to 0.33°(6.225 km). This technology provides a new way to deviation control and drilling fast in superdeep slim hole wells in Western China. |
| Key words: oil well drilling superdeep slim hole well deviation control and drilling fast decelerating turbine |
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