Parametric Design of Key Components in Downhole Motor

Abstract

Downhole motor is an instrument to drill oil wells, different from rotary drilling in working methods. While downhole motor works, the drilling stem of which remains still supplies power to bits directly so that a much higher transmission efficiency of power can be achieved. Downhole motor has been a key developing downhole tool recently. It is installed in a limited space with a certain diameter, asking for a higher power, so the design of which is rather difficult. This paper mainly studies the key components of downhole motor in structure design and its working characteristics. And parametric design employed in series design to shorten design cycle is presented in this paper. After taken Solidworks as a basic software platform and turbodrill turbine section with diameter of 245mm as an original model, parametric design of key components in downhole motor has been achieved by setting the parameters of key components, adding relations, editing program, creating a new part etc. Parametric design methods presented in this paper has already been applied in series design of downhole motor at Yangtze University.