Boring or penetrating the earth – Bit or bit element – With fluid conduit lining or element
Patent
1997-05-30
1999-07-27
Bagnell, David J.
Boring or penetrating the earth
Bit or bit element
With fluid conduit lining or element
175424, E21B 1060
Patent
active
059274107
ABSTRACT:
A fluid nozzle for threaded insertion into a drill bit. The nozzle is equipped with a drive head that receives a socket-type torquing tool. The torque forces exerted by the tool compress the drive head, permitting larger torque forces to be exerted on the nozzle without breakage of the drive head that occurs where a tension force is produced in the drive area by the torquing tool. Use of a compressive drive structure permits the use of less material, which in turn permits a larger flow passage to be formed through the nozzle for a given nozzle size. The facets of the drive area may be inclined relative to the nozzle axis to limit the torque force applied by a drive tool. When the torque force exceeds a limit determined by the configuration and inclination of the facets, the tool is forced axially off of the drive area. This feature controls the amount of torque applied to the nozzle and prevents nozzle damage. Inclining the lands of the drive area also assists in preventing breakage of a nozzle formed from tungsten carbide as the nozzle shrinks away from a die form during the heating step in the fabrication process of the nozzle.
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Arfele Robert W.
Greer Richard L.
Bagnell David J.
Dresser Industries Inc.
Elkassed Abdel G.
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