Ultra-short Radius Horizontal Well Drilling Technology Based on Wireless Follow-Drill Measurement
In order to solve the problem of low production and high water content in old wells at the late stage of oilfield development,the ultra-short radius horizontal wells were drilled on the upper well section side of the old wells by adopting the method of small-size and high-curvature MWDfollow-drill instrumentwith high slope-rate screw,and the technology of large-curvature inclination and horizontal drilling was researched.Through the design and development of the small-size and high-curvature MWD follow-drill instrument,high inclination screw and other special tools,and the combination with the design and development of special tools such as small-size and high-curvature MWD drilling instruments and high inclination screws,and the combination with the requirements of field construction,the ultra-short radius horizontal well drilling technology based on the wireless drilling measurement method was developed.The results show that this technology has the advantages of high construction efficiency,real-time monitoring of downhole parameters and high precision of trajectory control,and the indexes have reached the domestic leading technology level,which can realize the directional digging and transformation of the residual oil reservoir in old wells,expand the oil drainage area,improve the production conditions of wells and increase the recovery rate.
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