Heavy wall drill pipe

- LOR, Inc.
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Description

FIG. 1 is a side elevational view of the heavy wall drill pipe showing our new design, all sides being identical;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof.

Referenced Cited
U.S. Patent Documents
910891 January 1909 Atwood
2770873 November 1956 Ramsey
3193918 July 1965 Heldenbrand
3458922 August 1969 Schellstede et al.
3458922 August 1969 Schellstede et al.
3754609 August 1973 Garrett
3773359 November 1973 Chance et al.
3784238 January 1974 Chance et al.
4011918 March 15, 1977 Jurgens
4211440 July 8, 1980 Bergstrom
4349050 September 14, 1982 Bergstrom et al.
Foreign Patent Documents
2900678 July 1980 DEX
Patent History
Patent number: D297847
Type: Grant
Filed: Apr 20, 1984
Date of Patent: Sep 27, 1988
Assignee: LOR, Inc. (Lafayette, LA)
Inventors: Gregg S. Perkin (Kingwood, TX), Alonzo L. DeCell (Houston, TX), Peter Patarini (Paravara)
Primary Examiner: Susan J. Lucas
Assistant Examiner: Clare E. Heflin
Attorneys: Gregg S. Perkin, Alonzo L. DeCell, Peter Patarini
Application Number: 6/602,384