ONGC Increases ROP by 40% to Save 15.7 Rig Days Using StingBlade Bit | Schlumberger
Tech Report
India, Asia

Gujarat-Saurashtra Basin
Offshore India

Kutch Saurashtra

Mumbai High

Volcanic dike


Oil and Natural Gas Corporation Limited (ONGC) in India needed to drill a minimum of 300 m [980 ft] through a volcanic dike formation. In an offset well, the operator encountered high variation in unconfined compressive strength (UCS) throughout the section—in some places as high as 33,000 psi [228 MPa].

While drilling the offset well, nine bits were used to penetrate through 550 m [1,804 ft] of Mesozoic formation with an average ROP of 0.5 m/h [1.6 ft/h]. This resulted in high drilling costs. Moving forward, ONGC needed to cut costs in order to drill the deepest offshore HT well in the India and Bangladesh region.

Products Used

ONGC Increases ROP by 40% to Save 15.7 Rig Days Using StingBlade Bit

StingBlade bit with PowerPak motor drills 8 times deeper than conventional roller cone bit and lowers cost per meter by more than 50%, offshore India

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The StingBlade bit drilled a cumulative 819 m [2,687 ft] with an average ROP of 2.3 m/h [8 ft/h] in the first run and 1.6 m/h [5.2 ft/h] in the second run. This was a 40% increase in average ROP. The bit increased the average length drilled per bit by 8 times, which resulted in a savings of 15.7 rig days and a more than 50% reduction in cost per meter as compared with drilling the offset well.
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