Hydraulic drilling tool
Abstract
Abstract THE PRESENT INVENTION PERTAINS TO AN IMPROVED APPARATUS FOR USE WITH POSITIVE DISPLACEMENT MUD MOTORS EMPLOYED IN PRESENT DAY DIRECTIONAL DRILLING OPERATIONS. DOWNHOLE DEVIATIONS ARE USUALLY ACCOMPLISHED TODAY BY THE USE OF THESE DRILLING MACHINES IN COMBINATION WITH A BENT SUB PLACED ABOVE THE MACHINE WHICH THEREBY FORCES THE DRILL BIT TO DRILL IN THE DESIRED DIRECTION. THE INSTANT INVENTION PROVIDES A HYDRAULIC SUB WHICH IS PREFERABLY POSITIONED ABOVE THE DRILL MOTOR AND BENT SUB WHEREBY JAMMING OF THE DRILL BIT IS ELIMINATED. THE PRESENT HYDRAULIC FEED SUB BASICALLY COM- PRISES A PISTON-AND-CYLINDER ASSEMBLY WHICH IS ACTUATED BY THE DRILLING FLUID THAT OPERATES THE MUD MOTOR.
Inventors
- 👤 Bobby R Herring
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |