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SPERRY-SUN INTRODUCES GEO-PILOT™ ROTARY STEERABLE SYSTEM
HOUSTON, Texas - Sperry-Sun Drilling Services, a division of Halliburton Energy Services (HES), recently commercialized its new Geo-Pilot™ rotary steerable system. The system consists of the Geo-Pilot rotary steerable tool, designed in collaboration with Japan National Oil Corporation (JNOC), Sperry-Sun's logging-while-drilling (LWD) system, specially designed long-gauge bits from Security DBS, and the INSITE™ data acquisition and management system. Halliburton Energy Services is a business unit of Halliburton Company (NYSE:HAL).
The Geo-Pilot rotary steerable tool, the first true point-the-bit rotary steerable tool, operates by deflecting a rotating driveshaft off center, causing the driveshaft to flex and by creating an equal and opposite deflection on the output side (bit side) of the lower bearing. To date, the system has undergone field trials at the Gas Research Institute's research facility near Catoosa, Oklahoma, and has been run commercially for operators in Norway, Canada, Alaska and the Gulf of Mexico.
One recent commercial run was completed for Spirit Energy in the Gulf of Mexico. With the Geo-Pilot system, a total of 5,627 feet were drilled on two runs of 4,507 feet and of 1,120 feet. The challenging well plan called for a shallow kickoff, building to 33 degrees inclination at a rate of 2.5 degrees/100 feet, holding angle for 1,200 feet, and then dropping to near vertical and kicking off, building 55 degrees, and turning 182 degrees to complete the section.
The difficult well path was followed with great precision and showed significant decreases on downhole torque and drag values compared with expectations based on similar wells. No extra circulation time was required for hole cleaning. The Geo-Pilot system is designed to drill a higher quality
wellbore and to minimize hole spiraling, thus eliminating traps along the bottom of the hole where cuttings can accumulate. The use of long-gauge bits from Security DBS, a division of HES, made possible by the Geo-Pilot's point-the-bit concept, also greatly affects the quality of the wellbore. The extra stabilization provided by the long gauge keeps the bit centered, reducing side cutting action so that the majority of the energy is directed at the rock immediately in front of the bit, improving efficiency and making for a straighter hole. This also reduces downhole vibration levels, which leads to longer bit life and increased LWD reliability.
"We see the Geo-Pilot rotary steerable system as having a profound impact on drilling, even more than other rotary steerable systems," states Edgar Ortiz, president, Halliburton Energy Services. "This is due to the fact that the point-the-bit concept lends itself to the use of long-gauge bits. These hole quality issues - straighter, smoother wellbores - will dramatically affect a host of problems that have plagued our industry for years. By minimizing borehole spiraling, we reduce our time spent circulating for hole cleaning, improve our logging and LWD tool response, improve the quality of our cement jobs, and reduce stuck pipe and casing incidents. We will also push the limits of extended-reach drilling even beyond where we have already gone."
Halliburton Energy Services provides products, services and integrated solutions for oil and gas exploration, development and production. Capabilities range from the initial evaluation of producing formations to drilling, completion, production enhancement and well maintenance - for a single well or entire field. With over 300 service centers in more than 90 countries, HES possesses the global perspective that is increasingly important for energy exploration and production.
Founded in 1919, Halliburton Company is the world's leading diversified energy services, engineering, construction, maintenance and energy equipment company. In 1998, Halliburton's consolidated revenues were $17.4 billion and it conducted business with a workforce of approximately 100,000 in more than 120 countries. The company's World Wide Web site can be accessed at http://www.halliburton.com
Contact
Wendy Hagan
Halliburton Company
(p) 713.676.5619
wendy.hagan@halliburton.com
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