Richard N Greer

US Patent:

45836043, Apr 22, 1986

Filed:

Oct 19, 1984

Appl. No.:

6/663301

Inventors:

Richard L. Greer - Houston TX

Assignee:

Hytech International, Inc. - Houston TX

International Classification:

E21B 1030
E21B 1710

US Classification:

175346

Abstract:

A roller reamer for an earth boring tool is provided in which rollers are carried by shafts in pockets in the reamer body. The shafts are supported in bearing blocks which have segmental cylindrical surfaces at their widths, and a relatively shorter length as measured along the axis of the opening in the block for the shaft. The bearing blocks are passed through an entryway communicating the pocket with a recess adjacent the end of the pocket. The bearing block is passed through the entryway in a position transverse to its operative position and into the recess, and is then rotated in the recess, by cooperation of the cylindrical walls of the bearing block and mating cylindrical walls of the recess, to the operative position. The movement of the bearing block is readily achieved since it has a clearance fit with the recess to permit free assembly and disassembly of the bearing block.

US Patent:

59274107, Jul 27, 1999

Filed:

May 30, 1997

Appl. No.:

8/866677

Inventors:

Richard L. Greer - Spring TX
Robert W. Arfele - Houston TX

Assignee:

Dresser Industries, Inc. - Dallas TX

International Classification:

E21B 1060

US Classification:

175393

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.