Summit-FAS has an alternate lag option from the traditional calcium carbide lag procedure. Calcium carbide is water sensitive and produces acetylene gas when wet. It is highly restricted and regulated for over the road transport by the US DOT. This compound cannot be legally transported over the road in any amount without a special hazardous material permit.
Through our experience with Gas Referencing™ techniques we have an alternate lag procedure by using propylene (C3H6) in place of calcium carbide. Propylene is widely available and used commonly as a welding gas. Similar to acetylene, it is not found in formation gas and can be chromatographed as a separate peak. As a 3-carbon compound, it has a higher response on our FID systems than acetylene. One of the best features of the propylene lag system is that our mudlogger can perform the lag without going onto the drill floor and without assistance from the drill crew. This eliminates any skin contact or inhalation danger for the mudlogger and drill crew that can occur when calcium carbide is used. The system is easy to install with one or two injection ports with a quick connect fitting installed in the low pressure side of the suction line.
Please email or call if you would like more information on this new lag system.