Iranian Experts Manufacture Downhole Drilling Motor for Oil Industry

“Downhole motors are of great importance in the oil well drilling industry, specially directional drilling, and the most important feature of this product is that it enables producers around the world to extract from reservoirs that are not economically feasible to extract by using traditional methods,” said Fatemeh Hafezi, the deputy director of technological research at the Academic Center for Education, Culture and Research of Sharif University of Technology.

“In this project, the indigenization of production of two types of downhole motors in sizes of 6 and 3-quarters inches and 2 and one-eighth inches, which have many uses, can play a significant role in solving the problems of the country's oil industry,” she added.

Compared to conventional rotary drilling operations, the use of a downhole motor (also known as mud motor or drilling motor) allows a higher drilling performance.

In addition, the drill string rotation can be lowered, whereby the wear on drill string and casing is reduced. In combination with a MWD system (Measurement While Drilling) numerous directional drilling applications are possible. 
Downhole motors basically consist of a helical rotor and a rubber coated stator housing.

When the drill mud flows through the motor, the cavities between the stator and rotor are filled. The rotor then performs an eccentric rotational motion that is forwarded to the drill bit as drive power.

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