New low-speed high-torque motor experience in Europe
New low-speed high-torque motor experience in Europe
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欧洲低速大扭矩电机新体验
DOI：
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发表时间：
1982
期刊：
影响因子：
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通讯作者：
J. Forrest
中科院分区：
文献类型：
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作者：
A. Beswick;J. Forrest
苏联设计的新一代多叶正排量泥浆马达自 1981 年初以来已在欧洲使用。全面的经验已经证明了这一开发对于各种钻井应用的重要性和潜力。本文描述了根据 Moineau 原理运行的电机的设计概念，并参考最近的一些应用（包括直孔钻进、定向钻进和取芯）讨论了其性能。低速、高扭矩特性允许持续高钻头重量，首次使用井下电机在钻头处提供接近旋转的条件，从而在钻井中提供许多优势。案例参考包括英国康沃尔郡干热岩地热能研究项目中在花岗岩中的两口 7000 英尺深井中综合使用电机进行定向钻探的总结。此外，还介绍了使用带有多晶金刚石和三牙轮钻头的电机进行直孔钻探的评论，以及取芯应用的大量参考。概述了基于早期运行经验对原始设计的技术改进，并讨论了未来的潜在应用。
A new generation of multi-lobe positive displacement mud motors designed in the USSR has been used in Europe since early 1981. A comprehensive range of experience has already demonstrated the importance and potential of this development for a wide variety of drilling applications. This paper describes the design concept of the motor which operates on the Moineau principle and discusses the performance with reference to a number of recent applications including straight hole drilling, directional drilling and coring. The slow-speed, high-torque characteristics, which permit sustained high bit weights, give near rotary conditions at the bit for the first time with a downhole motor, offering many advantages in drilling. The references to case histories include a summary of the comprehensive use of the motors for directional drilling in two 7000 ft deep wells in granite for a hot dry rock geothermal energy research project in Cornwall, UK. In addition comments on the use of the motors with polycrystalline diamond and tricone bits for straight hole drilling are presented, together with a number of references to coring applications. The technical improvements to the original design based on early operational experience are outlined and future potential applications discussed.