Disappearing Glass Casing
Flotation Sub



Tartan’s Debris-less Disappearing Glass Flotation Sub allows operators to float casing to bottom in long laterals. Casing below the sub is left empty allowing buoyancy to reduce friction through the lateral while the weight of fluid above the sub helps push casing to bottom.


Floating casing in long laterals can eliminate the need to rotate casing to bottom which can also eliminate the need for premium casing threads. The flotation sub is installed and run as an integrated part of the casing string. This increases the efficiency of the installation process and provides full bore access once the sub is removed.

The patented laminated glass material provides a secure, non-corrodible seal under high temperature and axial loads, capable of withholding extreme levels of differential pressure from above. Upon removal, the glass material breaks into minute particles which can be safely circulated through sleeves, toe valves, and oat equipment. No debris trap nor landing collar is needed.

Features and benefits

• No debris trap nor landing collar needed
• High debris tolerance
• Full bore access
• Customer specified activation pressure
• No personnel required
• No impact on cementing operation or downhole equipment
• Reduce casing running time
• No special cementing plugs needed • Shorter shoe track, more pay zone

Fill out your information to receive the Disappearing Glass Casing Flotation Sub data sheet.

Case Studies


Tartan MultiFrac systems successfully stimulated 18 months post-install.


Tartan Cemented MultiFrac Limited Entry Ball-Drop System Reduces Stimulation Time by 5 Days per Well Compared to Plug-and-Perf in the D-J Basin.


Tartan cemented MultiFrac limited entry ball-drop systems increase production by 12.5%.

What Our Customers are Saying

“EOG has dealt with Tartan Completions since 2010, during which time they provided us completions equipment and services in our Rockies Region in the USA. Tartan has helped EOG lower costs through increased efficiency and equipment reliability and have always provided knowledgeable operational support for our daily completions operations. We can confidently recommend Tartan Completions as a solid and reliable supplier, and experts in completions equipment and services.”
EOG Resources
“Tartan Completions has been providing Crescent Point Energy with downhole milling services since 2009 when they started milling out frac ports in Saskatchewan. They have completed hundreds of jobs for us and still are our trusted service provider to do milling and fishing work in both Alberta and Saskatchewan. For any company looking for downhole milling services, we highly recommend Tartan Completion’s continued repeatable and reliable services and support.”
Crescent Point Energy Group

Ask us how we can help you meet your company objectives.

Complete the form below.