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Deep Casing Tools UK Success

Deep Casing Tools successfully ran the new 5” Turborunner™ system for CNR International in a horizontal application offshore central North Sea. Deep Casing Tools is an Aberdeen based company whose growing family of innovative technology delivers major benefits in well construction.

This new size of Turborunner™ tool, specifically design to support smaller open hole completion placement, combines optimized washing with a rotational reaming capability, avoiding rotation of the completion string itself. The very low operating pressure is ideally suited for integration with completion systems.

Placement of the liner was seen to be a significant risk due to the stability of the sand shale sequences in the long open hole section. The CNR International drilling team selected the Turborunner™ to provide an operational advantage in the event of difficulties in running the liner. The tool was run on a 5500 foot long 4 ½” liner into a 6” open hole. Upon reaching planned depth, the tool and the liner were cemented in place without issue.

Senior Drilling Engineer for CNR International – Stephen Cameron, commented “The Turborunner is a cost effective solution which greatly enhances the successful running of the liner string in potentially unstable formations, without compromising the well”.

Lance Davis CEO of Deep Casing Tools said, “This application typifies the challenges faced by the industry brown field opportunities. On one side, the challenge stems from balancing mud weights, particularly in long horizontals, to support the borehole. On the other, the challenge is to deliver what can be an expensive completion to target depth without rotation, premature setting or damage.”

With continued success, uptake of the Deep Casing Tools technology is increasing. The experience gained from the Turborunner™ applications has also a direct impact on the Turbocaser™ to be released early 2011. This new product is specifically designed to aid the placement of casing and intermediate strings with the key feature of a fullbore motor.