November 21, 2008
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Expandables

Tatneft’s Expandable Systems Isolate Cavernous, Lost Circulation Intervals While Drilling

Attempts to run casing strings to the required depth during well construction sometimes fail because of filter cake buildup or sludging, rock sloughing, and wellbore stability issues.

Application of Tatneft’s Expandable Profile Liners in Complex Geologic Environment

Since early 1980s, expandable casing strings developed by Tatneft engineers have been extensively used for isolation of trouble zones.

Tatneft Expandable Technology: Track Record and Range of Expandable Products

Tatneft Joint-Stock Company has pioneered the innovative method of trouble zones' isolation with expandable casing strings, widely known nowadays as an expandable technology.

Tatneft Expandable Technology: Track Record and Range of Expandable Products

Continued from Part 1 published in OGE #4, 2007

In 1988, we started to use the expandable technology to case off caving formations penetrated by slanted wells and to control caving and well stability issues when drilling horizontal wells through the Kynovian formation targeting the Pashiyan deposits.

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