Frac sleeve with rotational inner diameter opening
US8499841B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 5, 2009 |
| Grant date | Aug 6, 2013 |
| Priority date | — |
| Expiry date | Aug 29, 2030 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/134
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present application is to a method of sequentially drilling a number of frac sleeves in a down hole well. The design enables the removal of fracture sleeve pistons from between treatment zones without requiring drilling or milling of the sleeve while allowing for full flow of fluids after treatment. A number of plugs or pistons having sequentially smaller central bores allows for balls to sequentially be inserted through the tool to selectively close off the pistons to isolate one zone from another. A release tool may inserted into the tool to engage and unthread the plugs to open up the inner diameter of the tool to allow greater production flow through the tool. The plugs may have mating tabs and holes so that as each plug is unthreaded it falls to the next plug and engages so that each plug may sequentially be unthreaded from the sleeve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.