E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
255/73
E21B 10/60 (2006.01) E21B 10/62 (2006.01)
Patent
CA 1234562
ABSTRACT OF THE DISCLOSURE A drilling fluid nozzle for an earth boring bit is formed entirely of tungsten carbide, having hard-ground threads on its exterior for securing in the bit passage. The nozzle has an upwardly facing shoulder located below the threads which sealingly engages a downwardly facing shoulder formed in the bit passage. An O-ring seal is located above the threads.
481351
Gowling Lafleur Henderson Llp
Halliburton Energy Services Inc.
Hughes Tool Company-Usa
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