Method of cementing well casing to avoid gas channelling from shallow gas-bearing formations
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 6, 1993
Grant Date -
N/A
app pub date -
Nov 30, 1990
filing date -
Dec 1, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Gas channeling to the surface in the setting of surface casing can be avoided by employing a cementing process in which a right-angle setting cement is positioned within a wellbore annulus between the wellbore and the casing above a gas-bearing zone with a low fluid loss cement slurry being placed below the right-angle setting cement. Pumping of the cement slurry is stopped for a period of time to allow the setting of the right-angle setting cement at which point pressurized pumping is resumed to displace remaining portions of the low fluid loss cement slurry into the wellbore annulus against the plug created by the set right-angle setting cement to block off gas migration and squeeze the low fluid loss cement into the gas-bearing zone.
First Claim
Family
International Classification(s)
- Non-US Classification not provided for expired patents
Cited Art Landscape
Patent Citation Ranking
- Citation Ranking not provided for expired patents
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully