Abstract: A hybrid wellbore drilling bit assembly and a method for drilling a borehole with a hybrid wellbore drilling bit assembly are described. A base connects the hybrid wellbore drill bit assembly to a drill string. Blades are connected to the base, extending away from the base along the longitudinal axis and tapering toward the longitudinal axis of the hybrid wellbore drilling bit assembly base creating a tapered cavity. The blades have cutters to shear a core of the Earth that enters the cavity. The core of Earth expands in the cavity. A crusher is connected to the base and positioned within the cavity which crushes the core of Earth.

Abstract: A method of manufacturing, assembling, configuring, and/or using a hybrid drill bit is disclosed. An illustrative example includes inserting a rolling cutting structure into a central bore of a bit body through an upper connector section of the bit body toward a lower end portion of the bit body. The bit body has a rotational axis and a plurality of blades at the lower end portion. The upper connector section is configured to be coupled to a lower end of a drill string. Each of the plurality of blades extends radially from the bit body about the rotational axis at the lower end portion and includes a plurality of cutters embedded therein.

Abstract: A hybrid earth-boring bit comprising a bit body having a central axis, at least one, preferably three fixed blades, depending downwardly from the bit body, each fixed blade having a leading edge, and at least one rolling cutter, preferably three rolling cutters, mounted for rotation on the bit body. A rolling cutter is located between two fixed blades.

Abstract: A drill bit including: a main body portion including three legs extending therefrom, the three legs arranged around a periphery of the main body portion; a conical cutter rotatably mounted on each leg, the conical cutters positioned to allow a clearance between the conical cutter and the main body portion; a protrusion extending from the main body portion into the clearance, wherein the protrusion encourages drill cuttings away from a base region of the main body portion where the legs meet the main body portion.

Abstract: An earth-boring drill bit is described, the bit having a bit body having a central longitudinal axis that defines an axial center of the bit body and configured at its upper extent for connection into a drill string; at least one primary fixed blade extending downwardly from the bit body and inwardly toward, but not proximate to, the central axis of the drill bit; at least one secondary fixed blade extending radially outward from proximate the central axis of the drill bit; a plurality of fixed cutting elements secured to the primary and secondary fixed blades; at least one bit leg secured to the bit body; and a rolling cutter mounted for rotation on the bit leg; wherein the fixed cutting elements on at least one fixed blade extend from a center of the bit outward toward a gage region of the bit but do not include a gage cutting region, and wherein at least one roller-cone cutter portion extends from substantially the drill bit's gage region inwardly toward the center of the bit, an apex of the roller-cone cu

Abstract: An earth boring drill bit is described, the bit having a bit body having a central longitudinal axis that defines an axial center of the bit body and configured at its upper extent for connection into a drillstring; at least one primary fixed blade extending downwardly from the bit body and inwardly toward, but not proximate to, the central axis of the drill bit; at least one secondary fixed blade extending radially outward from proximate the central axis of the drill bit; a plurality of fixed cutting elements secured to the primary and secondary fixed blades; at least one bit leg secured to the bit body; and a rolling cutter mounted for rotation on the bit leg; wherein the fixed cutting elements on at least one fixed blade extend from the center of the bit outward toward the gage of the bit but do not include a gage cutting region, and wherein at least one roller cone cutter portion extends from substantially the drill bit's gage region inwardly toward the center of the bit, the apex of the roller cone cutte

Abstract: A drill bit configured for boring holes or wells into the earth include a plurality of blades configured with a recessed center such that the blades cut a core therebetween. Cutting elements in the recessed center are configured to cut and remove the core. The recessed center has a first diameter at a height from the cutting elements in the recessed center and a second diameter smaller than the first diameter such that the confining stress on the core is relieved prior to being cut by the cutting elements in the recessed center.

Abstract: A drill bit (20) for connection to a casing string (R), wherein the bit (20) comprises an annular bit face (21) which is built-up by a matrix and which comprises a sintered diamond-metal powder mixture, wherein the bit face (21) includes a plurality of radially orientated liquid delivery slots (16, 23, 26) for cooling and cleansing the bit face (21), wherein at least one of the liquid delivery slots is comprised of an inner slot (23) which extends radially outwards from the inside (24) of the bit face (21), wherein the slot (23) is terminated with an inner bottom (24) in the bit face (21), wherein a further liquid delivery slot comprises an outer slot (26) that extends radially inwards from the outside (27) of the bit face, and wherein said outer slot is terminated with an outer bottom (28) in the bit face (21).

Abstract: Advanced masonry coring systems for coring and grouting masonry walls are disclosed in this patent. The systems include rotating machinery and a drill column in the form of a cylindrical double-piped string of pipe sections, rotating a cylindrical drill body. The drill body mounts cutting end faces having alternative means of employing carbide or diamond cutting and/or pulverizing elements. The double drill pipe weight is made workable through new aerospace composite fabrication. The double pipe permits more efficient routing of air and removal of drill cuttings. Advancement in various system components and means of placing reinforcement into walls is disclosed. Further disclosure is included of advanced means of optimizing resin grouting materials and procedures to fill the wall cavities created by the core drill, integrating the reinforcement into the walls.

Abstract: A rotary drill bit for drilling subterranean formations configured with at least one protective structure proximate to the rotationally leading and trailing edges of a gage trimmer, wherein the at least one protective structure is positioned at substantially the same exposure as its associated gage trimmer. Particularly, the apparatus of the present invention may provide protection for gage trimmers during drilling, tripping, and/or rotation within a casing; i.e., when changing a drilling fluid. Protective structures may be configured and located according to anticipated drilling conditions including helix angles. In addition, a protective structure may be proximate to more than one gage trimmer while having a substantially equal exposure to each associated gage trimmer. Methods of use and a method of rotary bit design are also disclosed.

Abstract: A core drill bit with at least two geometrically defined, flat cutting elements (2a, 2b), wherein at least a first cutting element (2a) has an axial rake angle (&agr;1) and a radial rake angle (&bgr;1) and a second cutting element (2b) with an axial rake angle (&agr;2) and a radial rake angle (&bgr;2) is present, wherein different axial rake angles (&agr;1≠&agr;2) and/or different radial rake angles (&bgr;1≠&bgr;2) are present or at least one cutting element (2a) is present with a radial rake angle not equal to zero (&bgr;1≠0)

Abstract: A core bit for cutting core samples in subterranean formations. The core bit has interior geometric features configured to control the quantity of drilling fluid, or flow split, flowing into a narrow annulus defined by an inside diameter of the core bit and an outside diameter of a core shoe. Reducing the flow split minimizes fluid invasion of a core being cut; thus, the core bit provides increased core quality and recoverability. The core bit is also adaptable for use with conventional core barrel assemblies and conventional coring techniques.

Abstract: A rotary cone drill bit (10) with two-stage cutting action is provided. The drill bit (10) includes at least two truncated conical cutter assemblies (20) rotatably coupled to support arms (18), where each cutter assembly (20) is rotatable about a respective axis (44) directed downwardly and inwardly. The truncated conical cutter assemblies (20) are frusto-conical or conical frustums in shape, with a back face (60) connected to a flat truncated face (22, 62) by conical sides. The truncated face (22, 62) may or may not be parallel with the back face (60) of the cutter assembly (20). A plurality of primary cutting elements or inserts (24) are arranged in a predetermined pattern on the flat truncated face (22, 62) of the truncated conical cutter assemblies (20). The teeth (26) of the cutter assemblies (20) are not meshed or engaged with one another and the plurality of cutting elements (24) of each cutter assembly (20) are spaced from cutting elements (24) of other cutter assemblies (20).

Abstract: A masonry coring system for drilling vertical holes in a masonry wall comprises a drill bit in the form of a thin-walled cylinder having a cutting end face, a plurality of cutting elements fastened to the cutting end face, and a core breaker located within the interior of the cylinder. The coring system further comprises a driver plate fastened to the drill bit opposite the cutting end face, a driver shaft having a small axial hole therein fastened to the upper surface of the driver plate, a hydraulic motor to rotate the driver shaft, a non-rotating plastic pipe slightly larger than and surrounding the driver shaft, the plastic pipe resting on the driver plate and containing a plurality of holes located at the end near the driver plate. An air compressor forces compressed air through the axial hole in the driver shaft. An evacuation system withdraws the drilling dust through the annulus between the driver shaft and pipe and into a dust collector.

Abstract: A drill bit for drilling a hole in the ground, with cutting elements annular by cutting a core which, when it has reached a certain height, is continuously crushed by teeth on rolling cones. By combining these two processes, cutting and crushing, in this manner an improved drilling advancement is achieved as compared to separate use of these processes. The cutting elements show relatively small variations as to radial positioning, which renders it possible to find a common approximately optimal rotational speed of said elements. The core is weak and may be drilled out relatively easily by the aid of crushing, as compared to drilling pure holes. This is due to the fact that the core geometry causes a more efficient growth of fractures for each tooth penetration, and that the core, due to annular cutting, is free from radial tensions from the surrounding rock formations.

Abstract: An improved earth drilling bit and method that cuts at least one annular kerf ahead of at least one rolling cutter and provides for rock chip removal and bit cooling thereby increasing drilling rate and bit performance. One embodiment of the invention includes a bit body having a lower end forming an annular kerf cutter for cutting an outer annular kerf, an inner drill member positioned concentrically within the bit body having a lower end forming an annular kerf cutter for cutting an inner annular kerf, and at least one rolling cutter mounted to the bit body and extending from the interior of the outer kerf cutter to the longitudinal axis of the drill bit. Other embodiments include a chipway port defined by the drill bit for channeling rock chips away from beneath the bit; baffles for directing and accelerating drilling fluid flow; cutting edges having connecting webbs providing egress for rock chip and drilling fluid; and slots extending along the bit body for reducing surge and swab pressure.

Abstract: Disclosed herein is a drill stem having a core bit mounted thereon and an inner tube assembly having an inner tube mounting a corebreaker case that either has or in conjunction with the inner tube provides a corebreaker recess having an upwardly facing planar edge. Advantageously a stop ring and a non-axial split annular corebreaker are mounted in the recess with the stop ring being between the corebreaker and inner tube, even though the corebreaker may be axially slit and/or no stop ring used. The corebreaker has inner and outer peripheral surfaces that are of constant diameters, axial opposite transverse inner and outer planar edges while the recess is in part defined by planar edges. At least one of the parallel edges is inclined to the tube central axis when the core breaker is in its core taking position.

Abstract: A drill bit for drilling a hole in the ground, with cutting elements annularly cutting a core which, when it has reached a certain height, is continuously crushed by teeth on rolling cones. By combining these two processes, cutting and crushing, in this manner an improved drilling advancement is achieved as compared to separate use of the same processes. The cutting elements show relatively small variations as to radial positioning, which renders it possible to find a common approximately optimal rotational speed of said elements. The core is weak and may be drilled out relatively easily by the aid of crushing, as compared to drilling pure holes. This is due to the fact that the core geometry causes a more efficient growth of fractures for each tooth penetration, and that the core, due to annular cutting, is free from radial tensions from the surrounding rock formations.

Abstract: A drilling bit comprising a drill body formed from a base portion and a crown portion having a plurality of cutting elements; the base and crown portions are interengaged by a connection portion. An external opening in the crown portion communicates with a core-receiving section in the connecting portion. A core milling assembly, comprising a pair of rotatable, frustum-shaped rotary members, is supported in the connecting section. Each rotary member carries a plurality of cutting elements. During drilling, a core is received in the core-receiving section, where it is milled by the rotation of the rotary members.

Abstract: An earth boring machine with a rotating cutter head having a multiple of individual cutters positioned at different distances from the center of rotation and angularly spaced from one another on the cutter head while the cutter head itself is shaped to direct the cuttings into a collecting area, which may be under the center of the rotary head or which may be concentric about the center area, has elevator means, which may be mechanical, hydraulic or pneumatic, to remove the cuttings from the collection area, and has one or more crushing rollers thereon arranged to crush cuttings which are too large for effective removal by the elevator means into small chips or fragments together with barrier means for restraining such oversize pieces in the path of the crushing roll or rollers so as to prevent their entry into the collection area until they have been adequately crushed. The barrier means so provided are arranged to permit the smaller fragments and chips to move into the collection area with little impedance.