Apparatus and method for running casing in a wellbore
US10519753B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 22, 2017 |
| Grant date | Dec 31, 2019 |
| Priority date | — |
| Expiry date | Jan 24, 2038 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B34/063
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A float collar tool for running a casing string assembly into a wellbore includes a non-fragmenting rupture disc that temporarily isolates light fluid trapped in a lower portion of the casing string from heavier fluid in the upper portion of the casing string, thereby reducing the horizontal weight of the casing string by an amount sufficient to overcome a drag force. After the casing string is landed at a final location in the wellbore, the rupture disc is burst by increasing fluid pressure in the upper portion of the casing string. The increased pressure activates a piston that then moves the burst rupture disc into a protective region of the tool so that the inside diameter of the casing string is substantially restored.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.