Abstract: A drill pipe assembly has an inner tubular member with a Trojan central bore. An outer tubular member circumscribes the inner tubular member. An annular storage space is defined between the outer tubular member and the inner tubular member. An uphole connection member connects to an uphole drill string so that the Trojan central bore is in communication with the uphole drill string. A downhole connection member connects to a downhole drill string so that the Trojan central bore is in communication with the downhole drill string. A window assembly is moveable between a closed position and an open position. In the open position the window assembly provides a flow path between the annular storage space and an outside of the outer tubular member. In the closed position the window assembly prevents a flow between the annular storage space and the outside of the outer tubular member.

Abstract: A drill pipe assembly has an inner tubular member with a Trojan central bore. An outer tubular member circumscribes the inner tubular member. An annular storage space is defined between the outer tubular member and the inner tubular member. An uphole connection member connects to an uphole drill string so that the Trojan central bore is in communication with the uphole drill string. A downhole connection member connects to a downhole drill string so that the Trojan central bore is in communication with the downhole drill string. A window assembly is moveable between a closed position and an open position. In the open position the window assembly provides a flow path between the annular storage space and an outside of the outer tubular member. In the closed position the window assembly prevents a flow between the annular storage space and the outside of the outer tubular member.

Abstract: Systems and methods include a computer-implemented method for manufacturing a binder for spraying onto tools. A binder is manufactured for binding compacts onto a tool substrate. The binder is designed to provide a coating strength on the tool substrate. The binder includes: a metal selected from iron (Fe), cobalt (Co), and nickel (Ni); an alloy including the metal selected from Fe, Co, and Ni; or a refractory alloy selected from tungsten, tantalum (Ta), molybdenum (Mo), and niobium (Nb). An ultra-high-pressure, high-temperature operation is performed on pure wurtzite boron nitride (w-BN) powder to synthesize w-BN and cubic boron nitride (c-BN) compact. A binder-compact mixture is produced by turbulently mixing the binder with the compact in a mixer within a vacuum. The binder-compact mixture is thermally sprayed onto a tool substrate to coat the tool.

Abstract: Systems and methods include a computer-implemented method can be used to make milling tools from new wurtzite boron nitride (w-BN) superhard material. An ultra-high-pressure, high-temperature operation is performed on pure w-BN powder to synthesize w-BN and cubic boron nitride (c-BN) compact having a first size greater than particles of the pure w-BN powder. The ultra-high-pressure, high-temperature operation includes pressurizing the w-BN powder to a pressure of approximately 20 Gigapascal, heating the w-BN powder at a heating rate of 100° C./minute and cooling the w-BN powder at a cooling rate of 50° C./minute. The compact is cut to a second size smaller than the first size using laser cutting tools. The cut compact is turbulently mixed with additives in a mixer under vacuum. The cut compact mixed with the additives is thermally sprayed onto a tool substrate to form the tool.