Frac plug system having bottom sub geometry for improved flow back, milling and/or setting
US10458200B2 · kind B2 · utility
4Cited by
4References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 17, 2017 |
| Grant date | Oct 29, 2019 |
| Priority date | — |
| Expiry date | Oct 21, 2037 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/1204
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A technique facilitates plugging of a wellbore during, for example, a fracturing operation. A frac plug is constructed with an unobstructed internal passage and comprises a seal member combined with a plurality of slips for engaging a surrounding wall, e.g. a surrounding wellbore wall. Additionally, the frac plug comprises a lower sub having raised edges arranged to catch a ball during a flow back stage without blocking flow along the unobstructed internal passage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.