North Sea Well Drilled with Casing Drilling, Rotary Steerable Technology

Tesco Corporation on Monday said that it successfully used its proprietary Casing Drilling technology to drill the first ever offshore well utilizing the combination of industry-standard rotary steerable systems coupled with Tesco's retrievable Casing Drilling tools and processes. The well was drilled in three stages:

--Two side by side 13 3/8" strings were placed utilizing Tesco's patented CDS(TM) technology.
--A 10 3/4" casing string was directionally casing drilled to a depth of 4886 ft and maximum angle of 22 degrees.
--A 7 3/4" casing string was directionally casing drilled to a total depth of 12,088 ft and a maximum angle of 70 degrees.

The well was drilled for an operator in the Norwegian sector of the North Sea.

Julio M. Quintana, Tesco's President and CEO stated, "We see this achievement as a major milestone for our technology. While this is the tenth well utilizing rotary steerable systems in conjunction with our proprietary Casing Drilling technology, this is the first offshore well utilizing the combination of these two technologies to solve our client's well construction challenges. I have stated, and continue to believe that the marriage of these two technologies will become the standard by which most directional offshore wells will be drilled in the future."

Tesco Corporation is a global leader in the design, manufacture and service of technology based solutions for the upstream energy industry. The corporation's mandate is to change the way people drill wells by delivering safer and more efficient solutions that add real value by reducing the costs of drilling for and producing oil and gas.

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