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Case Study: ONYX 360 Rolling PDC Cutter in Colombia Foothills Saves More Than 2 Days and USD 454,200

Integrated drillbit design platform optimizes PDC bit to drill 324 ft in Mirador Formation, increases run footage by 116%

Challenge: Drill an 8 1/2-in section of the Mirador Formation to 250 ft in one run while reducing drilling time.

Solution: Use IDEAS integrated drillbit design platform to develop 8 1/2-in MDSiR813 PDC bit with ONYX 360 rolling PDC cutters.

Result: Drilled 324 ft in 100 h at ROP of 3.2 ft/h, which when compared with the performance of fixed cutters used in offset wells, increased run footage by 116%, saving the operator more than 2 days and USD 454,200.

Cutter damage limits drilling capability in abrasive formation

An operator wanted to drill 250 ft of an 8 1/2-in section in Colombia’s Mirador Formation in one run while reducing drill time. MSi813 PDC bits with fixed cutters drilled an average of 150 ft at 2.5 ft/h in offset wells, but the cutters wore out quickly due to the sandstone reservoir’s highly abrasive conditions and unconfined compressive strength at 25,000 psi.

PDC bit with rolling cutter improves run footage and ROP

To develop an optimized bit for the application, Smith Bits used the IDEAS integrated drillbit design platform to analyze BHA data, directional profiles, mud properties, and offset dull condition information. Based on the data from the offset bit, which was an 8 1/2-in MSi813 PDC bit with fixed cutters, an MDSiR813 bit with ONYX 360 rolling PDC cutters was recommended. The dynamic cutters rotate 360° to eliminate localized wear seen on conventional fixed cutters, increasing footage and average ROP.

ONYX 360 cutters significantly increase bit durability

The 8 1/2-in MDSiR813 PDC bit with ONYX 360 rolling cutters drilled 324 ft in 100 h at an average ROP of 3.2 ft/h. Compared with bits fitted with fixed cutters that drilled an average of 150 ft in offset wells, bits with rolling cutters increased footage by 116%, saving the operator 2 days and USD 454,200.


Download: ONYX 360 Rolling PDC Cutter in Colombia Foothills Saves More Than 2 Days and USD 454,200 (0.34 MB PDF)

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ONYX 360 Cutters Increase Run Footage by 116%

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ONYX 360 Rolling PDC Cutters—Drill Farther

ONYX 360
When compared with fixed-cutter-only bits, PDC bits that included ONYX 360 rolling cutters demonstrated run length increases of up to 57%, resulting in fewer bit trips and lower drilling costs.
Visit ONYX 360 PDC Cutter page