Method and apparatus to cure drilling losses with an electrically triggered lost circulation material
US11261679B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 26, 2020 |
| Grant date | Mar 1, 2022 |
| Priority date | — |
| Expiry date | Aug 26, 2040 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/138
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Provided is a system for emplacing an electrically activated lost circulation material within a wellbore. The system may comprise a bottom hole assembly connected to a drill string, with an activation tool that may be provided along the bottom hole assembly. The system may comprise an activation tool with a non-conductive isolation sleeve having an inner bore, electrodes exposed to an outer surface of the isolation sleeve, conductive cables electrically connecting the electrodes to one of an anode terminal and a cathode terminal, and a seat extending into the inner bore. Further provided is a method for plugging a loss zone in a wellbore that may use at least one activation tool. The method may include circulating an electrically activated lost circulation material to the loss zone and delivering electricity from a power source to electrodes of the activation tool to solidify the electrically activated lost circulation material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.