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Unconventional Polycrystalline-Diamond-Bit Design Allows Significant Performance Gains

This paper discusses the design, manufacture, and application of a contiguous blade of polycrystalline diamond (PCD). This bit has full-length, contiguous PCD coverage, without gaps between cutters on each blade, as in a conventional PCD-compact (PDC) bit design. The implementation of this bit represents a step change in bit design.

Drill-Bit Damage

The traditional view has been that PCD cutters are the most important part of the PDC bit because they are required to engage the formation and maintain their geometrical properties long enough for shear drilling to be economical. The bit body, then, is necessary only in order to hold the cutters in their arranged layout, and to convey mechanical and hydraulic power to remove the rock in their path.

This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper SPE 156961, “Departure From the Norm in Polycrystalline-Diamond-Bit Design Allows Significant Performance Gains in Highly Erosive and Abrasive Formations,” by Aron Deen, Jason Maw, Craig Knull, and John Clegg, SPE, Ulterra Drilling Technologies, prepared for the 2012 SPE Annual Technical Conference and Exhibition, San Antonio, Texas, USA, 8–10 October. The paper has not been peer reviewed.
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Unconventional Polycrystalline-Diamond-Bit Design Allows Significant Performance Gains

01 December 2013

Volume: 65 | Issue: 12

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