Patent ID: 8752656
Filing Date: 2014-06-17
Classification: C22C,E21B

Abstract:
1. A method of designing a bottom hole assembly comprising a drill bit having a bit body and a plurality of cutter elements attached thereto, which method comprises: selecting a design; determining at least one or more properties of the drill bit; and determining an arrangement for the plurality of cutter elements to be positioned upon the bit body; wherein the plurality of cutter elements comprise at least one of a first cutter element and at least one of a second cutter element; wherein the first cutter element is a thermally stable polycrystalline diamond cutter element containing a diamond body having a material microstructure comprising a matrix phase of bonded together diamond crystals formed at high pressure/high temperature conditions in the presence of a catalyst material, the diamond body having a working surface for contacting an earthen formation and including interstitial regions disposed between the diamond crystals, wherein the interstitial regions within the diamond body are substantially free of the catalyst material and the diamond body further comprises: wherein one or more areas of the drill bit have different properties relative to other areas of the drill bit; wherein the second cutter element comprises a polycrystalline ultra hard material and differs from the first cutter element in at least one cutter element property; and wherein the at least one first cutter element and the at least one second cutter element are positioned on the surface of the bit body based on the one or more drill bit properties and the cutter element properties.