DRILL PIPE is a tubular steel conduit fitted with special threaded ends called tool joints. The Drill Pipe connects the rig surface equipment with the bottom hole assembly and the bit, both to pump drilling fluid to the bit and to be able to raise, lower and rotate the bottom hole assembly and bit. Drill Pipe: 2-3/8" to 6-5/8" OD, range 2 and 3.
HEAVY WEIGHT DRILL PIPE is an intermediate member of the drill string with thicker wall than associated drill pipe. HWDP tends to be stronger and has higher tensile strength than conventional drill pipe. Heavy Weight Drill Pipe: 2-7/8" to 6-5/8" OD, welded or integral, range 2 and 3.
DRILL COLLAR is a component of a drill string that provides weight on bit for drilling. Drill collars are thick-walled tubular pieces machined from solid bars of steel, usually plain carbon steel but sometimes of nonmagnetic premium alloys. Drill Collar: 2-7/8" to 11" OD, slick or spiral, range 2 and 3.
SUBS are generally part of most drill strings and have two main functions: - to connect two different drilling components, - to extend the life of a more expensive drill stem and/or as a disposable component. Manufactured from bars of alloy steel, heat treated to provide strength and toughness required to carry the entire weight of the drill string or to withstand high torque differentials. Main categories: bit subs, lift subs, top drive subs, workover subs, etc …
PUP JOINTS are short drill pipe used to adjust the length of the drill string. They undergo the same stresses as drill pipe and their performances depends primarily on their superior mechanical properties.
SAFETY VALVES are used at surface to ensure safety on rig floor by controlling kicks while drilling. Downhole safety valves are used downhole to enable safe operations on the rig floor, by preventing back flow of the mud, when breaking connections. The safety valve system is designed to be fail-safe to prevent the uncontrolled release of reservoir fluids in the event of a worst-case-scenario surface disaster.
STABILIZER is a piece of downhole equipment used in the bottom hole assembly (BHA) of a drill string. It mechanically stabilizes the BHA in the borehole in order to avoid unintentional sidetracking, vibrations, and ensure the quality of the hole being drilled.