The Mule Downhole Mumerical Analysis Of Drag Force On

Easy to transport, the simple operation and getting location accurate are the good quality of the Mule Downhole Tractor. It reduces the logging cost. As the most economic logging tool for servicing horizontal wells, the Mule Downhole Tractor plays the most important role in horizontal logging, perforation and fishing jobs. Therefore the research and development is very important, and the social benefits will be accumulated in the future.The paper analyzes the theory of operation about Mule Downhole Tractor. And completes the research of the Mule Downhole Tractor movement unit and mechanics drive by applying the Flexible body and dynamic simulationsAt first, the paper shows the operating procedure of tracting the logging tools. And then analyzes the operating procedure of the movement unit. It builds the model of the movement unit in SoildWorks.After transfering the movement unit model from SoildWorks environment into ADAMS environment, the movement unit simulation model is built and the important simulation data is recorded during the simulation of the movement unit in the horizontal well.At last, the paper discusses the friction of the tractor in Complex environment and analyzes the force of logging cable in different situations. It builds the logging cable model in the ADAMS environment and the mechanical simulation about the logging cable passing the directional hole. It provides the curves of the force during the logging cable passing the directional hole.