2013
DOI: 10.2118/168224-pa
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A New Theory on Cutter Layout for Improving PDC-Bit Performance in Hard-and Transit-Formation Drilling

Abstract: Summary It is well-known that cutter layout on a polycrystalline-diamond compact (PDC) bit plays a key role in bit stability and drilling efficiency. In today's PDC bit, cutters are laid out according to two general principles: single set or track set. A single-set cutter layout is defined as having no cutters at the same radial or axial position after cutters are rotationally projected into a radial plane passing through the bit axis (this is referred to as bit profile in the ind… Show more

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Cited by 22 publications
(4 citation statements)
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“…The force-balanced condition of a PDC bit withsingle-set cutters may be violated during transit-formation drilling was found. A new cutter layout procedure is proposed, which not only ensures the force-balanced condition during transit drilling but also significantly improves drilling efficiency [18]. When the front rake angle is between 15˚ and 20˚, the rockbreaking effect of the PDC bit cutter is desirable.…”
Section: /13mentioning
confidence: 99%
“…The force-balanced condition of a PDC bit withsingle-set cutters may be violated during transit-formation drilling was found. A new cutter layout procedure is proposed, which not only ensures the force-balanced condition during transit drilling but also significantly improves drilling efficiency [18]. When the front rake angle is between 15˚ and 20˚, the rockbreaking effect of the PDC bit cutter is desirable.…”
Section: /13mentioning
confidence: 99%
“…In this respect, bit profiles, cutter sizes, blade counts, cutting structures (Weaver, et al, 1993), back rakes, etc can be adapted to project and/or application specific project objectives. Additionally, force balancing (Chen, et al, 2013), which contributes to the dampening of cutting action induced vibrations, can be better executed for bits.…”
Section: Drilling Mechanics Drilling Dynamics and Drilling Parametersmentioning
confidence: 99%
“…5,6 A grouping cutter layout method was proposed to keep the lateral force balanced under transit drilling conditions. 7 Based on the aforementioned research, multilevel force-balanced drilling tools and methods are researched. The PDC bit will be in a good force state during the drilling process when the ratio of M b to M t is less than 4%, and the ratio of F l to F w is less than 4%.…”
Section: Introductionmentioning
confidence: 99%