Jan
15
Freeze Frack Fracturing Process Diagram
January 15, 2010 | Leave a Comment
The process uses concentric coiled tubing, or alternatively jointed pipe and coil tubing to circulate a refrigerant along the length of a horizontally drilled wellbore. The refrigerant, liquid CO2, flows through the annulus between the two tubes freezing the surrounding water in the wellbore. This creates the expansion force that radiates outward a full 360 degrees. Use of a concentric coil tubing in this process prevents the refrigerant from coming in direct contact with the freezing water. It also provides a means of moving the freezing process along the length of the wellbore even though the outside tubular is frozen in place. The internal coil is movable, like a retractable aerial on a car, so it can be positioned strategically along the lateral line.
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Photo Credit: Triple D Technologies, Inc.
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