A rotary drill tool for cutting rock includes at least one journal leg mounting a spindle and a respective rotary cone cutter. The spindle includes a plurality of fluid distribution passageways arrnaged to provide a supply of a cooling and cleaning fluid to the bearing assembly. Vent holes are provided through the cutter to allow an exhaust flow of fluid and an annular seal is provided at a base region of the spindle to maintain a positive fluid pressure within the cutter cavity to prevent dust and dirt ingress.

A cutting element has an intercrystalline-bonded diamond body that includes an inner region and an outer surface that includes a working surface of the cutting element. The outer surface is treated, after formation of the intercrystalline-bonded diamond by high-pressure/high-temperature process, to have a level of surface compressive stress that is greater than a compressive stress of the inner region.

A cutting element has an intercrystalline-bonded diamond body that includes an inner region and an outer surface that includes a working surface of the cutting element. The outer surface is treated, after formation of the intercrystalline-bonded diamond by high-pressure/high-temperature process, to have a level of surface compressive stress that is greater than a compressive stress of the inner region.

A drill bit assembly for drilling a hole through earth, the drill bit comprising: a bit body extending between a first end and a second end along a longitudinal axis of the bit body with a connecting arrangement positioned at the first end of the bit body for coupling the bit body to a rotating shaft for providing rotational torque to the bit body; a cutting head including a leading tip portion for cutting into earth and a trailing receiving portion for receiving the second end of the bit body in an internal cavity defined by the receiving portion to allow the cutting head to be removably coupled to the second end of the bit body; a retaining arrangement to retain the second end of the bit body in the receiving portion of the cutting tip.

A well drilling bit for drilling bedrocks includes a columnar bit body, and a drilling fluid flow path formed in the bit body to wash away drilled cuttings from a bottomhole and/or a periphery of the bit body. The flow path is provided with a venturi mechanism including a venturi tube having a reduced-diameter portion where a cross sectional area is reduced and capable of generating a decompression region around a tip of the bit body, the decompression region being more decompressed than a surrounding by the Venturi effect.

A well drilling bit for drilling bedrocks includes a columnar bit body, and a drilling fluid flow path formed in the bit body to wash away drilled cuttings from a bottomhole and/or a periphery of the bit body. The flow path is provided with a venturi mechanism including a venturi tube having a reduced-diameter portion where a cross sectional area is reduced and capable of generating a decompression region around a tip of the bit body, the decompression region being more decompressed than a surrounding by the Venturi effect.

A method of manufacturing a drill bit or other oil-field tool includes aligning a cutting element support structure or a support structure for an alternative tool element to an image of a computer-generated model of a drill bit assembly or a computer-generated model of an alternative tool assembly. The method further includes placing a tool element on the support structure and comparing the placement of the tool element on the support structure to the placement of a model of the tool element on the image of the model of the tool assembly using real-time continuous deviation feedback. The method also includes adjusting the placement of the tool element on the element support structure to match the placement of the model of the tool element on the image of the model of the tool assembly and joining the tool element to the support structure.

A method of manufacturing a drill bit or other oil-field tool includes aligning a cutting element support structure or a support structure for an alternative tool element to an image of a computer-generated model of a drill bit assembly or a computer-generated model of an alternative tool assembly. The method further includes placing a tool element on the support structure and comparing the placement of the tool element on the support structure to the placement of a model of the tool element on the image of the model of the tool assembly using real-time continuous deviation feedback. The method also includes adjusting the placement of the tool element on the element support structure to match the placement of the model of the tool element on the image of the model of the tool assembly and joining the tool element to the support structure.

The present disclosure provides downhole tools, methods for three dimensional printing hardfacing on such downhole tools, and systems for implementing such methods.

The present disclosure provides downhole tools, methods for three dimensional printing hardfacing on such downhole tools, and systems for implementing such methods.