Method for accurately measuring reopening pressure of hydraulic fracturing induced fracture in deep borehole
US11274543B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 5, 2019 |
| Grant date | Mar 15, 2022 |
| Priority date | — |
| Expiry date | Dec 10, 2039 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B49/008
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present disclosure relates to the technical field of rock mechanics, and in particular to a method for accurately measuring a reopening pressure of hydraulic fracturing induced fracture in a deep borehole. The method includes: pumping a fluid into a sealed inner space of a drilling pipe for energy storage; and opening a valve at a lower end of the drilling pipe such that energy is released from the fluid in the inner space of the drilling pipe under the action of pressure to inject the fluid into a test interval. In the method according to the present disclosure, a fluid is pumped into an inner space of a drilling pipe so that the inner space of the drilling pipe is used as a high-pressure fluid pump to inject the fluid in the inner space of the drilling pipe to the test interval until the closed fracture is reopened.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.