Apparatus and method of conducting string shot operations
Abstract
Abstract STRING SHOT APPARATUS AND METHOD OF SERVICING PERFORATED WELL CASING USING ONE OR MORE EXPLOSIVE CORDS SUPPORTED ALONG A WIRE LINE AND EQUIPPED WITH DISCRIMINATOR MEANS FOR DETONATING THE CORDS INDEPENDENTLY OR IN GROUPS AT THE OPERATOR''S OPTION. THE WIRE LINE INCLUDES CENTRALIZERS DESIGNED TO BE QUICKLY ASSEMBLED TO AND DETACHED FROM THE LINE AS WELL AS MEANS FOR SECURING THE EXPLOSIVE CORD TO THE LINE IN A DESIRED DEGREE OF TANTNESS THE EXPLOSIVE CORD INCLUDES MEANS FOR ELIMINATING STRETCH AND PREFERABLY EMBODIED THEREIN TO SAFTGUARD AGAINST ITS ELONGATION BY FRICTIONAL OR OTHER FORCES ENCOUNTERED DURING THE SERVICING OPERATION. A READILY OPENED AND CLOSED BLOWOUT PROTECTOR IS SECURABLE ACROSS THE WELL HEAD TO SEAL THE WELL CLOSED ABOUT THE WIRE LINE TO AVOID A BLOWOUT IF THE SERVICING OPERATION RELEASES HIGH SUBSURFACE PRESSURES INTO THE WELL.
Inventors
- 👤 Bobby W Grayson
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-22 | 1974-09-21 | 1975-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-22 | 1978-09-21 | 1979-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-22 | 1982-09-21 | 1983-03-23 | $7700.00 | Window Closed / Lapsed |