Drill pipes are steel tubulars fitted with threaded ends called tool joints, which are commonly used in tension in the top part of the drill string to pump fluid and transmit torque to the bit.
We provide full range of high quality welded drill-pipe in conformance with industry specifications (such as API 5DP, 7.1 & 7.2., NS-1, DS-1 (AND CRITICAL), IRP 1.8, ISO, etc.) and other fit for purpose specifications covering the most challenging drilling environments:
- H2S environment
- Extended Reach Wells (ERD) or Deep Water Drilling
- Arctic Environment
- And many others
HEAVY WEIGHT DRILL PIPES (HWDP)
Heavy Weight Drill Pipe (HWDP) features a tool joint pin and box and a thick-walled tube with a raised central section for protection of the tube. The central section comes in various designs, slick, spiral, full spiral, or tri-spiral. HWDP can be manufactured as a welded assembly or machined integral from bars.
Designed to provide a gradual transition between drill pipe and drill collars.HWDP's main function is to provide WOB (weight on bit) and directional control of the BHA in complex wells.It also improves drill string fatigue resistance and performance in horizontal and ERD wells.
Drill collars are thick-wall tubulars machined from solid steel bars and manufactured to specifications to meet and/or exceed API specifications. Our experience in materials specification, mechanical properties, heat treatment, machining and inspection are reflected in our product performance. Drill collars come in slick and spiral designs with additional features for safe and trouble-free operations. Drill collars are used as a component of the bottom hole assembly (BHA) to provide:
- Weight on bit (WOB)
- BHA directional control
- Hole size integrity
- Drill string clearance
- Drill string compressive and torsional loads
Machined with precision the Rotary Kelly is a durable heavy square or hexagonal steel tube built to various configurations and customer specifications. They are used on rotary drilling rigs to rotate and push the drill bit by transmitting torsional energy from the rotary table to the drill-string and applying weight on bit (WOB).
Though now a days most drilling rigs have replaced the Kelly by a Top drive, rigs that still use Kellys need them to connect at surface to the swivel and the top of drill string allowing it to operate the drill string in and out of the well. The kelly's ability to perform this function is a result of the superior mechanical properties of the steel and the specifications to which it is manufactured.
ROTARY SUBSTITUTES (SUBS)
Rotary Substitutes (Subs) are classified into four main categories:
- Bit Subs or Crossover Subs are used to connect the drill bit to the first piece of BHA equipment or to cross-over connections in the drill string, Drill bits are manufactured with a pin making make-up impossible without a bit subs.
- Lift Subs or Handling Subs are used to lift BHA components from the catwalk to the rig floor.
- Top Drive Subs or Saver Subs serve as the sacrificial element between the drill string and the top drive, reducing repair and maintenance costs and
- Workover Subs or Circulating Subs are used to limit the allowable fluid-circulation rates.
PUP JOINTS (PUPS)
Pup Joints are short drill pipe used to adjust the length of the drill string and are available in standard lengths of 5', 10', 15', 20' and can be ordered to match other drill pipe dimensions.
Pup joints are commonly used to adjust the length of the drill string to the elevation of rotary table for easy surface handling and drilling practices. They undergo the same stresses as drill pipe and their performance depends primarily on their superior mechanical properties.
Optional items include:
- Hard Banding
- Internal Plastic Coating
- Thread Protectors
- VAM Hydroclean