1
John D Barr: Manufacture of rotary drill bits. Reed Tool Company, Browning Bushman Zamecki & Anderson, October 25, 1988: US04780274 (68 worldwide citation)

A method of manufacturing by a powder metallurgy process a rotary drill bit including a bit body having a plurality of cutting elements mounted on the outer surface thereof comprises the steps of forming a hollow mould for moulding at least a portion of the bit body, packing the mould with powdered ...


2
Nigel D Griffin: Manufacture of rotary drill bits. NL Petroleum Products, William E Johnson Jr, June 2, 1987: US04669522 (40 worldwide citation)

A method of making a rotary drill bit comprises forming a hollow mould for moulding at least a portion of the bit body, packing at least a part of the mould with powdered matrix material, and infiltrating the material with a metal alloy in a furnace to form a matrix, the alloy being a copper based a ...


3
Stephen M Evans: Manufacture of rotary drill bits. Camco Drilling Group, June 20, 1995: US05425288 (23 worldwide citation)

A method of manufacturing a rotary drill bit includes the steps of forming the bit body with a plurality of sockets, inserting in each socket a projecting carbon former, applying a fusible hard facing material to the surface of the bit body, and around the formers, by the localised application of he ...


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John D Barr: Manufacture of rotary drill bits. NL Petroleum Products, William E Johnson Jr, November 25, 1986: US04624830 (21 worldwide citation)

A method of manufacturing by a powder metallurgy process a rotary drill bit including a bit body having a plurality of cutting elements mounted on the outer surface thereof comprises the steps of forming a hollow mould for moulding at least a portion of the bit body, packing the mould with powdered ...


6
Albert M Sciaky, William R Mello: Method and apparatus for manufacturing rotary drill bits. Sciaky Bros, Julius L Solomon, July 4, 1978: US04098448 (21 worldwide citation)

A method and apparatus for the manufacture of rotary drill bits such as are used for oil well drilling which are constructed from a multiplicity of segments. The segments are provided with registration means for positioning the segments relative to one another and are placed in a fixture where they ...


7
Barry D Calnan, Valerie R C M J Sillen: Molds and methods of forming molds associated with manufacture of rotary drill bits and other downhole tools. Halliburton Energy Services, Baker Botts L, November 16, 2010: US07832456 (18 worldwide citation)

Three dimensional printing equipment and techniques may be used in combination with three dimensional design data associated with well drilling equipment and well completion equipment to form molds associated with manufacture of such equipment. For example, such molds may be used to form a bit body ...


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Nigel D Griffin: Manufacture of rotary drill bits. Reed Tool Company, Browning Bushman Anderson & Brookhart, August 21, 1990: US04949598 (16 worldwide citation)

A rotary drill bit is manufactured by forming a main bit body part from a machinable metal, such as steel, machining sockets in the outer surface of the main bit, inserting in each socket a thermally stable cutting structure or former which substantially fills at least the mouth of the socket and pr ...


10
Calnan Barry D, Sillen Valerie Rcmj: Molds and methods of forming molds associated with manufacture of rotary drill bits and other downhole tools. Halliburton Energy Services, Calnan Barry D, Sillen Valerie Rcmj, FELGER Thomas R, November 8, 2007: WO/2007/127899 (15 worldwide citation)

Three dimensional printing equipment and techniques may be used in combination with three dimensional design data associated with, well drilling equipment and well completion equipment to form molds (200) associated with manufacture of such equipment. For example, such molds may be used to form a bi ...



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