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Geir Tandberg Patents |
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Inventor: Tandberg; Geir
Address: N-3408 Tranby, NO
No. of patents: 3
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 5368114 |
Under-reaming tool for boreholes |
November 29, 1994 |
| An under-reaming tool for use in preferably horizontal and extended reach bore holes includes a succession of stabilizers, under-reamers and expandable stabilizers. A common drilling mud activator is provided for the expandable elements of under-reamers and expandable stabilizers. A |
| 5176212 |
Combination drill bit |
January 5, 1993 |
| A drill bit for drilling a hole in the ground, with cutting elements annular by cutting a core which, when it has reached a certain height, is continuously crushed by teeth on rolling cones. By combining these two processes, cutting and crushing, in this manner an improved drilling a |
| 5016718 |
Combination drill bit |
May 21, 1991 |
| A drill bit for drilling a hole in the ground, with cutting elements annularly cutting a core which, when it has reached a certain height, is continuously crushed by teeth on rolling cones. By combining these two processes, cutting and crushing, in this manner an improved drilling ad |
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