Highly reinforced elastomer for use in downhole stators

Details Highly reinforced elastomer for use in downhole stators Highly reinforced elastomer for use in downhole stators

E - Fixed Constructions

21

B

E21B 4/02 (2006.01) F01C 1/107 (2006.01) F04C 2/107 (2006.01)

Patent

CA 2598813

A Moineau stator for a downhole drilling motor and a method for fabricating the stator are disclosed. The stator includes an internal helical cavity component fabricated from an improved elastomeric material formulated to provide both high resilience and good processability. For example, in one exemplary embodiment the elastomer material includes rheological parameters M L in a range from about 1.0 to about 4.0 lb .cndot. in and M H in a range from about 75 to about 110 lb.cndot.in according to ASTM D2084 at 380 degrees F. Stators in accordance with this invention may exhibit improved efficiency (and may thus provide improved torque output) as compared with conventional stators without substantially increasing manufacturing costs.

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