IJE TRANSACTIONS A: Basics Vol. 30, No. 10 (October 2017) 1615-1621    Article in Press

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M. Dvoynikov, V. Syzrantsev and K. Syzrantseva
( Received: June 19, 2017 – Accepted in Revised Form: September 08, 2017 )

Abstract    Downhole drilling motors or mud motors are frequently used during the oil and gas well construction, especially for construction of directional and horizontal segments. However, low operation life of the down hole drilling motors and high rate of wear in their working elements may constrain their application due to technical and economical disadvantageousness. In this work, a high-torque modular motor is designed and used. Results of the theoretical and experimental investigations show that the developed down hole motor is characterized by lower torsional vibrations, improved operation stability and restored energy characteristics of the gerotor machine.


Keywords    Drilling, Downhole drilling motors, Working elements, Gerotor mechanism of modular design, Torsional vibrations


چکیده    موتورهای درون چاهی به صورت رایجی برای ساخت چاه های نفت و گاز مخصوصا چاه های جهت دار و افقی استفاده می شوند. به هر حال، عمر عملیاتی کم و درصد بالای استهلاک قطعات متحرک این موتورها، کاربرد آن ها را از نظر فنی و اقتصادی محدود می کنند. در این پژوهش یک موتور مدولار طراحی و استفاده شده است. نتایج آزمایشات تئوری و آزمایشگاهی نشان می دهد که موتور طراحی شده دارای نوسانات کششی کم، پایداری عملیاتی بهتر و خواص انرژی بالایی است.


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