Problem
During a recent geothermal project in Denmark, an operator required effective clean out of multiple casing envelopes. A combination of Coretrax’s wellbore clean up tools were selected to provide an efficient solution.
Solution And Achievement
Working in partnership with a local agent in Europe, all tools were prepared into sub-assemblies prior to shipping to ensure reduced rig time while limiting extra handling exposure at the site. The systems were prepared for three casing envelope sizes – 7”, 9 5/8” and 13 3/8”.
Coretrax’s Hi Pro Non-Rotating Casing Scraper, Hi Pro Casing Brush, SP Magnet and CX-Junk Filter Sub were utilized in a one-trip solution to clean up the 9 5/8” and 13 3/8” casings.
The combination of the casing scraper and brush successfully removed debris, scale, cement, and residual drilling fluid from the casing wall. The scraper has six blades specially aligned on the body to provide maximum contact with the casing ID while running-in and reciprocating the string. The CX-Junk Filter Sub provided additional assurances with its ability to effectively remove debris which is generally too large to be circulated out of the well.
The operator subsequently ran the 7” liner successfully before a second wellbore clean up trip was performed in the 7”, 9 5/8” and 13 3/8” and the well was successfully displaced from water-based mud to water.
The combination of Coretrax’s technology and effective pre-planning delivered significant rig time savings for the operator, with additional wells within the field now underway.
