Method for sealing pipelines
Abstract
Abstract A slinger nozzle or head assembly is moved through a pipeline to coat the interior thereof. The nozzle is normally positioned adjacent joint seams or other leak sites and rotated to develop centrifugal action. A cureable sealing composition is fed into the nozzle to be thrown by centrifugal force outwardly through openings in the sides of the nozzle. The sealing composition can then be distributed about the leak site on the interior surface of the pipeline. The operative assembly includes a closed circuit TV camera in a protective casing (or other detector) to which can be attached the slinger head followed by a supply container having a load of sealing composition. The composition is cureable and can be of the epoxy type with varying proportions of fillers to control the viscosity and catalyst curing agent to regulate the curing time. An inhibitor and/or accelerator can be included to prolong or lessen the pot life of the composition, particularly at higher temperatures.
Inventors
- 👤 G Brown
- 👤 F Hinds
Bibliographic Details
Claims Analysis
Total Claims: 4References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |