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The drill string is the connection between the rotary table (or top drive) on the rig and the drill bit at the bottom of the hole. The drilling pipe market supplies the components of this string, which must be strong, durable, and able to withstand the torsional and axial loads of drilling.
Components of the Drill String
The [LSI keyword: drilling pipe market] includes several products. Drill pipe: the long, thin-walled pipe that makes up most of the drill string. The drilling pipe market for "drill pipe" is the largest by length. Drill pipe is classified by its outside diameter, weight, and grade (strength). Heavy-weight drill pipe (HWDP): a thicker-walled pipe used in the transition zone between the drill pipe and the drill collars, to reduce fatigue. The drilling pipe market for "HWDP" is a smaller segment. Drill collars: thick-walled, heavy pipes used near the bit to provide weight on bit (WOB) and stiffness. The drilling pipe market for "drill collars" is essential for directional drilling. The drilling pipe market for "tool joints" (the threaded connections welded to the ends of drill pipe) is a related segment. The drilling pipe market is segmented by material (carbon steel, alloy steel), by grade (E-75, X-95, G-105, S-135), and by connection type (API, premium). The drilling pipe market for "alloy" steel is the fastest-growing, as it offers higher strength for deep drilling.
The drilling pipe market for "inspection" and "repair" is a large aftermarket. Drill pipe is subjected to immense stress and fatigue. The drilling pipe market for "non-destructive testing" (NDT) (magnetic particle, ultrasonic) is used to detect cracks before they cause a failure. The drilling pipe market for "hardbanding" (applying a wear-resistant alloy to the tool joints) is used to protect the pipe from abrasion.
The Drill String in Directional Drilling
The drilling pipe market for "directional" drilling requires specialized drill pipe. The drilling pipe market for "coiled tubing" (a continuous length of pipe that is spooled on a reel) is a separate but related market, used for workover and some drilling. The drilling pipe market for "wired" drill pipe (which has a wire embedded in the wall for high-speed data transmission) is a growing niche. As the drilling pipe market continues to evolve, the focus will be on "high-torque" connections (to handle the higher torque of rotary steerable systems), on "aluminum" drill pipe (for lighter weight), and on "glass-reinforced" epoxy (for corrosive environments). The drilling pipe market is the drivetrain of the drilling operation, and its reliability is essential for reaching total depth.
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