| RE39869 |
High efficiency drill pipe |
Michael Payne, Edmond I. Bailey |
2007-10-09 |
| 6447025 |
Oilfield tubular connection |
— |
2002-09-10 |
| 6305723 |
Tool joint and drill pipe made therefrom |
Ronald W. Schutz, Edmond I. Bailey |
2001-10-23 |
| 6244631 |
High efficiency drill pipe |
Michael Payne, Edmond I. Bailey |
2001-06-12 |
| 5908212 |
Ultra high torque double shoulder tool joint |
Thomas E. Winship, Gerald E. Wilson |
1999-06-01 |
| 5492375 |
Drill pipe with improved connectors |
— |
1996-02-20 |
| 5433130 |
Shoulder dressing apparatus |
Terry L. Fite, Clarence J. Hayes |
1995-07-18 |
| 5355968 |
Tool joint stress relief groove |
— |
1994-10-18 |
| 4506432 |
Method of connecting joints of drill pipe |
— |
1985-03-26 |