Abrado announced today that it has completed the first double-string section milled window in the North Sea utilizing the proprietary Medusa cutting technology.

Abrado Wellbore Services was asked to remove 100 ft of old 7 5/8-in. expandable liner and 9 5/8-in. host casing in order to successfully abandon a lower zone for slot recovery on a North Sea Platform. Abrado engineers worked collaboratively with the customer to mitigate the risks and elected to use its proprietary Medusa VS Section Milling Tool dressed specifically to mill out both strings simultaneously and underream to 11 1/4-in. open hole.

Despite the risks, Abrado Wellbore Services was able to successfully complete the task ahead of time in a single trip following the initial cut out run. Once confident that the 7 5/8-in. expandable liner would not rotate inside the 9 5/8-in. host casing, double string milling rates of up to 3.5 ft/hr were achieved.

“This was a challenging project that had never been attempted before, yet, Abrado was able to work the problem with the customer to get the desired result; in this case an available slot to sidetrack a new well from an existing platform” said John Donachie, Abrado International Business Development Director, based in Aberdeen.

Abrado announced today that it has completed the first double-string section milled window in the North Sea utilizing the proprietary Medusa cutting technology.

Abrado Wellbore Services was asked to remove 100 ft of old 7 5/8-in. expandable liner and 9 5/8-in. host casing in order to successfully abandon a lower zone for slot recovery on a North Sea Platform. Abrado engineers worked collaboratively with the customer to mitigate the risks and elected to use its proprietary Medusa VS Section Milling Tool dressed specifically to mill out both strings simultaneously and underream to 11 1/4-in. open hole.

Despite the risks, Abrado Wellbore Services was able to successfully complete the task ahead of time in a single trip following the initial cut out run. Once confident that the 7 5/8-in. expandable liner would not rotate inside the 9 5/8-in. host casing, double string milling rates of up to 3.5 ft/hr were achieved.

“This was a challenging project that had never been attempted before, yet, Abrado was able to work the problem with the customer to get the desired result; in this case an available slot to sidetrack a new well from an existing platform” said John Donachie, Abrado International Business Development Director, based in Aberdeen.

Source: www.worldoil.com