Abstract: A method and system for engineering a drilling bit program linked to rock removal at a cutting element/formation interface and specific to drilling of one or more wells in a given geographic area is disclosed. The system includes a first arrangement for planning the drilling of a particular well based upon a cascaded planning input and providing an engineered output which is a function of the cascaded planning input, wherein a level of the engineered output being dependent upon a level of the cascaded planning input. A second arrangement is provided for implementing the engineered output in the drilling of the particular well is also provided. Lastly, a third arrangement is provided for evaluating the implementation of the engineered output for the drilling of the particular well and providing an evaluation output. The evaluation output can be used by the planning arrangement as additional planning input for planning the drilling of a subsequent well in the geographic area.

Abstract: A rotary cone drill bit for forming a borehole having a bit body with an upper end portion adapted for connection to a drill string. A number of support arms extend from the bit body. Each support arm has an exterior surface with a stabilizer pad formed as an integral part thereof. A number of cutter cone assemblies equal to the number of support arms are rotatably mounted on respective support arms and project generally downwardly and inwardly from each support arm. A ramp may also be formed on the exterior surface of the support arm as an integral part thereof. Both the stabilizer pad and the ramp preferably have surfaces inclined at an angle from a leading edge of the support arm toward a trailing edge of the support arm such that a fluid flow channel is formed therebetween to direct drilling fluids and cuttings to flow upward in the borehole.