Bi-directional internal tubing plug
US8459344B1 · kind B1 · utility
7Cited by
7References
28Claims
0Family size
Inventor
Key dates
| Filing date | Aug 11, 2010 |
| Grant date | Jun 11, 2013 |
| Priority date | — |
| Expiry date | Jul 30, 2031 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/134
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An internal bidirectional tubing plug is adapted for insertion into a tubing string for sealing the tubing string internally while running the tubing into a fluid filled well. The tubing plug is comprised of a body having an inner surface with a recess; the recess holds petals and a keystone petal that are held by a cork that is held by a nut. At depth the tubing is filled with well fluid and the tubing plug is released at a predetermined hydraulic pressure, and the pieces are pumped to bottom or the pieces are circulated out of the well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.