Subterranean formation fracking and well workover
US10689938B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 2018 |
| Grant date | Jun 23, 2020 |
| Priority date | — |
| Expiry date | Aug 10, 2038 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/05
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
While a fracturing stack on a well is at fracturing pressure, receiving a perforating string in a section of the center bore of the fracturing stack. The section is a section above a fracturing head of the fracturing stack. While the fracturing stack is at fracturing pressure, sealing the section of the center bore to maintain a fracturing pressure in and below the fracturing head. Equalizing pressure in the section to atmospheric pressure. Receiving, at atmospheric pressure, a well drop in the section. Equalizing pressure in the section to pressure in the fracturing stack below the section. Releasing the well drop into the center bore of the fracturing head and to the well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.