Neyrfor 4 3/4-in T1XL MK1 vs. conventional high speed PDM

In a West Oklahoma Operator’s Colony Wash horizontal well in Washita Co., Oklahoma, a Neyrfor turbodrill 4 3/4-in T1XL MK1 was tested against a conventional high performance downhole motor. Both were fitted with 6 1/8-in Kinetic diamond impregnated bits which are extremely effective with turbodrills, as well as high speed PDMs. The turbodrill had the more difficult challenge of drilling off the open hole whipstock and building the majority of the 14°/100ft. curve. It had a maximum bit RPM of 1674, while that of the PDM was 1244.

Neyrfor turbodrill remains the drive system of choice

The turbodrill outperformed the high speed PDM by 55%, with an ROP of 10.02 ft/hr vs. 6.46 ft/hr. In 64.5 hours the Neyrfor turbodrill footage was 646 ft, compared to 420 ft achieved by the PDM in 65 hours.

With over 60 directional runs in the area for a West Oklahoma Operator, Neyrfor remains the preferred drive system, drilling the curve three to four days faster and extending the lateral 2.66 times further per run than conventional assemblies.