Lloyd H Garner

US Patent:

40687317, Jan 17, 1978

Filed:

Nov 17, 1976

Appl. No.:

5/742590

Inventors:

Lloyd L. Garner - San Clemente CA
Charles Richard Harris - Whittier CA

Assignee:

Smith International, Inc. - Newport Beach CA

International Classification:

E21B 910

US Classification:

175339

Abstract:

A rotary drill bit with downwardly extended circulation nozzle means an outwardly facing portion of which serves as a bit stabilizer wherein the upper portion of the nozzle means is on a greater diameter than the lower portion thereof so that the lower portion is inset from the wall of the formation, the upper portion of the nozzle means being machined from a given larger diameter to a diameter approximately but preferably slightly less than that of the bit body, and providing in the machine surface hardened inserts such as tungsten carbide.

US Patent:

42602033, Apr 7, 1981

Filed:

Sep 10, 1979

Appl. No.:

6/073751

Inventors:

Lloyd L. Garner - Dana Point CA

Assignee:

Smith International, Inc. - Newport Beach CA

International Classification:

F16C 3312

US Classification:

308 82

Abstract:

A rotary rock bit is disclosed having bearing surfaces utilized therein which have extremely long wear resistant properties. The rock bit comprises a plurality of legs extending downwardly from a main bit body. A cone cutter is rotatively mounted on a journal formed on each leg. One or more of the interengaging bearing surfaces between the cone and the journal includes a layer of diamond material mounted on a substrate of carbide. In one embodiment, the bearing material forms the thrust button adjacent the spindle located at the end of the journal. In another embodiment, the bearing material is located on the interengaging axial faces of the journal and cone. In still another embodiment, the bearing material is a segmented cylindrical bearing located in a circumferential groove formed in the journal.

US Patent:

43593356, Nov 16, 1982

Filed:

Jun 5, 1980

Appl. No.:

6/156717

Inventors:

Lloyd L. Garner - Dana Point CA

Assignee:

Smith International, Inc. - Newport Beach CA

International Classification:

B22F 700
C04B 3556
E21B 936
E21C 3518

US Classification:

75208R

Abstract:

A method of fabricating a rock bit insert which has improved wear characteristics is disclosed. Selected surfaces of the insert are implanted with a harder grade of tungsten carbide and sintered thereto. The special insert then would find application in the gage row of, for example, a roller cone rock bit.

US Patent:

43433715, Aug 10, 1982

Filed:

Apr 28, 1980

Appl. No.:

6/144515

Inventors:

William Baker - Irvine CA
Lloyd L. Garner - Dana Point CA
Charles R. Harris - Whittier CA

Assignee:

Smith International, Inc. - Newport Beach CA

International Classification:

E21B 1014

US Classification:

175329

Abstract:

A hybrid rock bit is disclosed wherein a pair of opposing extended nozzle drag bit legs are positioned adjacent a pair of opposed tungsten carbide roller cones. The extended nozzle face nearest the hole bottom has a multiplicity of diamond inserts mounted therein. The diamond inserts are strategically positioned to remove the ridges between the kerf rows in the hole bottom formed by the inserts in the roller cones.

US Patent:

40674061, Jan 10, 1978

Filed:

Jul 29, 1976

Appl. No.:

5/709797

Inventors:

Lloyd L. Garner - San Clemente CA
Charles Richard Harris - Whittier CA

Assignee:

Smith International, Inc. - Newport Beach CA

International Classification:

E21B 910

US Classification:

175341

Abstract:

A rock bit with rotary cone cutter means having hardened insert teeth utilizing fewer than the normal number of teeth or of cutters used for a given gage hole wherein the cone cutter body is of greater diameter and for approximately the same axial length, of a greater wall thickness and to accommodate a greater insert tooth depth or grip length and permit a proportional increase in extension of the insert from the cutter body to provide greater penetration with fewer insert teeth in contact at a given time, and also providing for increased journal bearing area to increase the life of the extended insert cutters.

US Patent:

40373002, Jul 26, 1977

Filed:

Apr 5, 1976

Appl. No.:

5/673391

Inventors:

Lloyd L. Garner - Los Alamitos CA

Assignee:

Smith International, Inc. - Irvine CA

International Classification:

B21D 5310

US Classification:

291484R

Abstract:

A rock drilling bit has a plurality of rolling cutters for pulverizing rock. The loads on the bearings between these cutters and their mounting pins are extreme and are carried by a friction bearing. The bearing surface in the cutter has a plurality of spaced apart pockets filled with a material harder than the carburized hardened steel of the balance of the bearing surface and having essentially zero ductility. Such a bearing surface is made by machining a plurality of shallow pockets in the cylindrical bearing surface either before or after carburizing. If formed before carburizing, the pockets are painted off to prevent carburizing in that area. Each of the pockets is then filled with the wear resistant hard material as a weld deposit. Finally, the steel body is hardened and the exposed steel portions of the bearing surface and wear resistant material are ground to form a finished bearing surface. Bearing life is increased substantially as compared with the best known prior bearing.

US Patent:

41507282, Apr 24, 1979

Filed:

Oct 28, 1977

Appl. No.:

5/846570

Inventors:

Lloyd L. Garner - San Clemente CA
George R. Herrick - Irvine CA
Charles R. Harris - Whittier CA

Assignee:

Smith International, Inc. - Newport Beach CA

International Classification:

E21B 908

US Classification:

175374

Abstract:

A rock bit for drilling hard formations has a bit body with a plurality of rolling cone cutters mounted on it for rotation with rotation of the bit body. The cutters each have a plurality of recesses in their outer surfaces and a tungsten carbide insert is interference fitted into each of said recesses. A large diameter rock bit has such inserts larger than about 3/4 inch diameter and a cavity is provided in the cylindrical base of such an insert. The cavity has a volume in the range of from about 15 to 30% of the volume of the cylindrical base and extends into the cylindrical base a distance of at least about 40% of the diameter of the base. The depth of the recess is more than half of the length of the portion of the insert that grips the recess in which it is inserted. Large savings in expensive tungsten carbide can be made without decreasing performance of the tungsten carbide inserts.

US Patent:

40210847, May 3, 1977

Filed:

Feb 4, 1975

Appl. No.:

5/546936

Inventors:

Lloyd L. Garner - Los Alamitos CA

International Classification:

F16C 1900

US Classification:

308 82

Abstract:

A rock drilling bit has a plurality of rolling cutters for pulverizing rock. The loads on the bearings between these cutters and their mounting pins are extreme and are carried by a friction bearing. The bearing surface in the cutter has a plurality of spaced apart pockets filled with a material harder that the carburized hardened steel of the balance of the bearing surface and having essentially zero ductility. Such a bearing surface is made by machining a plurality of shallow pockets in the cylindrical bearing surface either before or after carburizing. If formed before carburizing, the pockets are painted off to prevent carburizing in that area. Each of the pockets is then filled with the wear resistant hard material as a weld deposit. Finally, the steel body is hardened and the exposed steel portions of the bearing surface and wear resistant material are ground to form a finished bearing surface. Bearing life is increased substantially as compared with the best known prior bearing.