Abstract: A reamer for use in enlarging a borehole in a drilling operation, the reamer comprising: an elongate body defining a rotational axis about which the reamer is rotated in the drilling operation; and a plurality of reamer blocks configured to extend radially outwards from the elongate body relative to the rotational axis, wherein: each reamer block comprises at least a first row of cutters configured to engage a formation in which the borehole is being drilled with a given back rake in the drilling operation, a given portion of each first row extending longitudinally along its reamer block, a longitudinal direction being substantially parallel to the rotational axis; each back rake of said cutters is either a high back rake or a low back rake; and for at least one first row of cutters, the respective back rakes of the cutters alternate along the given portion of the row between one or more high back rakes and one or more low back rakes.

Abstract: A graphical user interface may provide visualization of comparison between planned value(s) and usage value(s) of a set of operating parameters for a tool. The graphical user interface may include a planned usage region and a usage region. The planned usage region may provide visualization of the planned value(s) for the tool. The usage region may provide visualization of the usage value(s) for the tool. The usage region may include a compliance section. The compliance section may provide visualization of whether the usage value(s) complies with the corresponding planned value(s) such that the compliance section includes different visual features based on whether the usage value(s) complies or does not comply with the corresponding planned value(s). The usage region may provide comments and/or recommendations based on the learnings from analysis of offset wells.

Abstract: A graphical user interface may provide visualization of comparison between planned value(s) and usage value(s) of a set of operating parameters for a tool. The graphical user interface may include a planned usage region and a usage region. The planned usage region may provide visualization of the planned value(s) for the tool. The usage region may provide visualization of the usage value(s) for the tool. The usage region may include a compliance section. The compliance section may provide visualization of whether the usage value(s) complies with the corresponding planned value(s) such that the compliance section includes different visual features based on whether the usage value(s) complies or does not comply with the corresponding planned value(s). The usage region may provide comments and/or recommendations based on the learnings from analysis of offset wells.

Abstract: The present disclosure provides a drill bit having cutters of different geometries, such as the combination of round cutters and scribe cutters. The drill bit includes at least one radial location at which both a round cutter and a scribe cutter are disposed. Thus, the drill bit leverages the high cutting efficiency of the scribe cutter as well as the high impact resistance of the round cutter. Additionally, the round cutter and the scribe cutter have the same maximum distance from the drill bit. Thus, the round cutter and the scribe cutter which share the same radial location contact the rock formation at substantially the same time when used in a drilling operation.

Abstract: A reamer is designed to enhance operation of a bottom hole assembly in which it is included. One or more capabilities and/or characteristics of the cutters carried by the reamer blocks of the reamer may be varied even in the same profile portion to enhance the functionality and/or durability of the reamer.

Abstract: The present disclosure provides a drill bit having cutters of different geometries, such as the combination of round cutters and scribe cutters. The drill bit includes at least one radial location at which both a round cutter and a scribe cutter are disposed. Thus, the drill bit leverages the high cutting efficiency of the scribe cutter as well as the high impact resistance of the round cutter. Additionally, the round cutter and the scribe cutter have the same maximum distance from the drill bit. Thus, the round cutter and the scribe cutter which share the same radial location contact the rock formation at substantially the same time when used in a drilling operation.

Abstract: A reamer is designed to enhance operation of a bottom hole assembly in which it is included. One or more capabilities and/or characteristics of the cutters carried by the reamer blocks of the reamer may be varied even in the same profile portion to enhance the functionality and/or durability of the reamer.

Abstract: A reamer is designed to enhance operation of a bottom hole assembly in which it is included. One or more capabilities and/or characteristics of the cutters carried by the reamer blocks of the reamer may be varied even in the same profile portion to enhance the functionality and/or durability of the reamer.

Abstract: A reamer is designed to enhance operation of a bottom hole assembly in which it is included. One or more capabilities and/or characteristics of the cutters carried by the reamer blocks of the reamer may be varied even in the same profile portion to enhance the functionality and/or durability of the reamer.

Abstract: A drill bit includes at least two different sets of cutting elements, each being the primary cutting set corresponding to a different formation. Upon encountering a significant change in formation characteristics, the first set of cutting elements may be sacrificed so that the second set of cutting elements becomes exposed, preventing the need to replace the drill bit immediately. The sets of cutting elements differ from one another, with each adapted to cut a different formation. The differences may include material toughness (impact resistance), bevel size, abrasion resistance, or backrake angle. Additional sets of cutting elements may be added to correspond to other formations or to otherwise improve performance.

Abstract: A drill bit has cutting elements with multiple cutting surface geometries that are positioned so that their cutting profiles overlap, but do not completely contain or engulf one another. The different cutting surface geometries and the specific overlap create a zone of high density in the middle regions of the cutting profiles and low density in the periphery, resulting in a cutting profile that becomes sharper with increasing wear. Such an arrangement is more effective and stable as the drill bit encounters hard and abrasive formation materials. Moreover, cutting elements with larger axial volumes may be combined with cutting elements having smaller axial volumes.

Abstract: A drill bit has cutting elements with multiple cutting surface geometries that are positioned so that their cutting profiles overlap, but do not completely contain or engulf one another. The different cutting surface geometries and the specific overlap create a zone of high density in the middle regions of the cutting profiles and low density in the periphery, resulting in a cutting profile that becomes sharper with increasing wear. Such an arrangement is more effective and stable as the drill bit encounters hard and abrasive formation materials. Moreover, cutting elements with larger axial volumes may be combined with cutting elements having smaller axial volumes, resulting in an even more effective drill bit in terms of durability and ability to drill efficiently in hard and abrasive formations.

Abstract: A drill bit has cutting elements with multiple cutting surface geometries that are positioned so that their cutting profiles overlap, but do not completely contain or engulf one another. The different cutting surface geometries and the specific overlap create a zone of high density in the middle regions of the cutting profiles and low density in the periphery, resulting in a cutting profile that becomes sharper with increasing wear. Such an arrangement is more effective and stable as the drill bit encounters hard and abrasive formation materials. Moreover, cutting elements with larger axial volumes may be combined with cutting elements having smaller axial volumes, resulting in an even more effective drill bit in terms of durability and ability to drill efficiently in hard and abrasive formations.

Abstract: A method of dynamically balancing a hole enlargement system is disclosed. The method includes modeling the hole enlargement system based on input parameters, simulating the hole enlargement system, adjusting one or more of the input parameters, and repeating the modeling, simulating, and adjusting until a balanced condition is met.

Abstract: A drill bit includes a drill bit body and first and second blades formed on the drill bit body. The first blade has first cutting elements defining a first profile length and an adjacent first gauge section having a first gauge length. The second blade has second cutting elements defining a second profile length and an adjacent second gauge section having a second gauge length which is shorter than the first gauge length of the first blade. Certain ones of the second cutting elements on the second blade rotationally overlap with a portion of the first gauge section on the first blade.

Abstract: Drill bit with multiple stages of durability and ROP characteristics is disclosed. The drill bit has multiple layers of cutters established by deploying the cutters on blades of different heights or maintaining the blades at the same height and deploying the cutters to have different heights on one or more blades. Each layer provides independent bottom hole coverage and has independent stabilization, ROP, and durability characteristics so as to effectively drill through different subsurface formations. Cutters deployed on the different layers have their respective centers at substantially different radial positions. Due to the different radial positions, cutters in different layers cut different swaths in the subsurface formation. Cutters in different layers may also have different initial peripheral portions or shear lengths, resulting in different impact resistance characteristics for the different layers.

Abstract: A drill bit has cutting elements with multiple cutting surface geometries that are positioned so that their cutting profiles overlap, but do not completely contain or engulf one another. The different cutting surface geometries and the specific overlap create a zone of high density in the middle regions of the cutting profiles and low density in the periphery, resulting in a cutting profile that becomes sharper with increasing wear. Such an arrangement is more effective and stable as the drill bit encounters hard and abrasive formation materials. Moreover, cutting elements with larger axial volumes may be combined with cutting elements having smaller axial volumes, resulting in an even more effective drill bit in terms of durability and ability to drill efficiently in hard and abrasive formations.

Abstract: A fixed cutter drill bit includes a plurality of gage pads, where certain of the gage pads have an active cutting region adjacent to the end of the gage pad adjacent to the bit face, and a passive region at the end of the gage pad adjacent to the pin-end of the bit. The active regions include forward-facing cutter elements. Other gage pads include an active region on the end adjacent to the pin-end, and a passive region on the gage pad end adjacent to the bit face. The passive and active regions have lengths within the range of 40 to 60 percent of the total axial length of the gage pads. A passive gage pad is positioned on the bit between the gage pads having both active and passive regions.

Abstract: A method for forming a drill bit body is disclosed which comprises infiltrating powdered tungsten carbide with a binder alloy in a mold. The mold has therein at least one displacement adapted to form a mounting pad for a cutting element. The displacement comprises a substantially cylindrical body having a diameter selected to substantially conform to a radius of the cutting element and a projection adapted to form a relief groove under a position of a diamond table in the cutting element when the cutting element is mounted on the pad. The width of the relief groove is selected so that the relief groove extends back from an outer surface of the bit body at least about 40 percent of that portion of a thickness of the diamond table which does not extend past the outer surface.

Abstract: A drill bit includes at least two different sets of cutting elements, each being the primary cutting set corresponding to a different formation. Upon encountering a significant change in formation characteristics, the first set of cutting elements may be sacrificed so that the second set of cutting elements becomes exposed, preventing the need to replace the drill bit immediately. The sets of cutting elements differ from one another, with each adapted to cut a different formation. The differences may include material toughness (impact resistance), bevel size, abrasion resistance, or backrake angle. Additional sets of cutting elements may be added to correspond to other formations or to otherwise improve performance.