Glass Floatation Subs

Summit’s Casing Runner Glass Flotation Sub enables operators to float casing to bottom in long laterals while reducing the likelihood of washing and reaming. By leaving the casing below the flotation sub empty, buoyancy is created that significantly reduces friction and drag through the lateral, allowing the weight of the fluid column to drive casing to bottom more efficiently.

The Casing Runner utilizes tempered glass material capable of withstanding extreme levels of differential pressure, along with a brass shear ring engineered to hold tight shear tolerances of ±7% of the expected rupture rating at both ambient and elevated temperatures.

Operational Advantages

• Enables casing to reach total depth in extended laterals
• Reduces friction and drag forces through buoyancy
• Minimizes the need to wash and ream casing to bottom
• Improves running efficiency and reduces non-productive time

Design & Performance Features

• Tempered glass designed for extreme differential pressure
• Brass shear ring with tight, predictable rupture tolerances
• Reliable performance across ambient and elevated temperature conditions

Ideal Applications

• Long lateral wells
• High-friction environments
• Operations where reducing drag and casing running issues is critical