Unocal has been actively developing horizontal well drilling and completion technology. This technology has been used to drill and complete wells with horizontal displacement to true vertical depth ratios (HD/TVD) of up to 2.92. This technology has also has been used to drill and install casing in the world's two longest horizontal wells, each containing approximately 1.1 miles of producing formation. This paper presents the techniques used to analyze torque and drag forces, and the buoyancy assistance technology used to overcome those forces.

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