Drilling rig control
Abstract
Abstract THE OPERATION OF A DRILLING RIG IS MONITORED AND CONTROLLED TO PREVENT DAMAGE OR UNNECESSARY DELAY DUE TO THE OCCURRENCE OF OFF-NORMAL OPERATION. FOR EXAMPLE, DRILL STRING TWISTOFF MAY BE INDICATED BY A SUDDEN DECREASE IN THE TOTAL WEIGHT OF THE DRILL STRING, A SUDDEN DECREASE IN DRILLING TORQUE, OR A SUDDEN DECREASE IN MUD PUMP PRESSURE. EACH OF THESE THREE VARIABLES IN MONITORED, AND A DEPARTURE OF ANY ONE OF THE THREE FROM AN ESTABLISHED LEVEL MAY BE USED TO SOUND AN ALARM. A SUDDEN DECREASE IN THE DRILL STRING WEIGHT ACTUATES A CONTROL RELAT WHICH MAY SHUT DOWN THE DRILLING RIG OPERATION COMPLETELY, OR ANY PART THEREOF. A SUDDEN DECREASE IN DRILLING TORQUE AND/OR A SUDDEN DECREASE IN MUD PUMP PRESSURE SIMILARLY OPERATES A CONTROL RELATY TO SHUT DOWN THE DRILLING RIG OPERATION COMPLETELY, OR ANY PART THEREOF.
Inventors
- 👤 Raymond J Bromell
- 👤 George Homanick
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |