BIG OMEGA™ – the World’s Premier Large Casing Connection. Deep oil and gas exploration means longer casing strings in big sizes. For this application, BIG OMEGA™ provides the most economical solution based on an efficient threaded & coupled design and a rugged thread profile.

Applicable range

Sumitomo Metals Pipe & Tube Company does not manufacture BIG OMEGA™. As a member of the VAM Family, Sumitomo Metals is pleased to provide BIG OMEGA™ connection documentation as a courtesy to our customers. BIG OMEGA™ can be sourced through Sumitomo Corporation.

• BIG OMEGA™ Casing is available in OD’s ranging from 14" to 26", on Carbon steel
• Yield strengths from 55 ksi to 110 ksi

Design principles and technical features

BIG OMEGA™ is a coupled connection.The pin thread is cut directly into the pipe.The risks associated with weld-on connectors are eliminated.

Standard coupling OD’s are identical with API; they may be increased for higher grades and larger wall thicknesses if matched internal pressure resistance is required. The standard coupling length is 10 5/8 in. (269,9 mm) as with API.

BIG OMEGA™ Casing is a mill threaded pipe. It is available in the quenched and tempered condition in both API and Proprietary grades.

BIG OMEGA™ Casing possesses a rugged thread profile featuring:

Field experience

More than 20 years have gone by since the delivery of the first casing string with BIG OMEGA™ connections, an 18 5/8" string which was run in the Khuff Wells nearAbu Dhabi, U.A.E. Since then, internationally proven and accepted, BIG OMEGA™ has been used widely by all major oil companies worldwide, e.g.:

• Europe (including the North Sea)
• USA and Canada (including theArctic)
• Africa
• SouthAmerica
• Middle East
• Far East
• China
• Australia

An internal torque shoulder (-IS option) whenever high torque and/or high axial compression are to be expected.