All mechanical counter dart, system and method
US11702908B2 · kind B2 · utility
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18Claims
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Assignee
Inventor
Key dates
| Filing date | Apr 8, 2021 |
| Grant date | Jul 18, 2023 |
| Priority date | — |
| Expiry date | Apr 8, 2041 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An all mechanical counter dart including a mandrel, a plurality of shoulder members disposed upon the mandrel and movable from a more downhole portion of the mandrel to a more uphole portion of the mandrel, individual ones of the plurality of shoulder members moving from an inactive position to an active position and back to an inactive position while traversing the mandrel, and an upset on the mandrel supporting the individual ones of the plurality of shoulder members when in the active position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.