The power section of a positive displacement drill motor (PDM) consists of a steel rotor and a tube with a molded elastomeric lining (stator). Power section failures are typically due to the failure of the stator elastomer. Stator life depends on many factors such as design, materials of construction, and down hole operating conditions. This paper focuses on the stator failure mechanisms and factors affecting stator life. An analytical method for predicting the effect of various design and operating parameters on the strain state and heat build-up within elastomers is discussed. The effect of parameters such as rotor/stator design, down hole temperature, drilling fluid, stator elastomer properties, motor speed, and motor differential pressure on the stator life is discussed. Non-linear finite element analysis is used to perform thermal and structural analysis on the stator elastomer. Data from laboratory accelerated life tests on power section stators is presented to demonstrate the effect of operating conditions on stator life.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Stator life of a positive displacement down-hole drilling motor


    Contributors:


    Publication date :

    1999


    Size :

    Seiten


    Type of media :

    Conference paper


    Type of material :

    Storage medium


    Language :

    English




    Development of Down-sized Motor Stator

    Utaka, R. / Kaneiwa, H. / Umeda, A. et al. | British Library Conference Proceedings | 2013



    Tethered, Down-Hole-Motor Drilling System - A Benefit to Mars Exploration

    Hill, J. L. / Shenhar, J. / Lombardo, M. et al. | British Library Conference Proceedings | 2003


    Development of Down-sized Motor Stator

    Takasaki, Akira / Umeda, Atsushi / Kaneiwa, Hiroshi et al. | SAE Technical Papers | 2013


    Hub motor stator cooling structure, hub motor stator and hub motor

    ZHANG HENGLIANG / LI CHEN / XUE PUZHEN | European Patent Office | 2023

    Free access