Time delay nipple locator and/or decelerator for pump down well tool string operations
US3997003A · kind A · utility
22Cited by
5References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 9, 1975 |
| Grant date | Dec 14, 1976 |
| Priority date | — |
| Expiry date | Jun 9, 1995 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B23/08
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A yieldable detent unit useful for pump-down well tool train operations that imparts a selected time delay from moment of unit engagement with a stop shoulder in a tubing run until the detent stop action is released, thereby causing a controlled duration fluid pressure increase pulse to be generated in the pump down system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.