Rotary Drilling Kelly Bar
Forged steel kelly bars that transmit torque from rotary table to drill bit in oil/gas well sinking rigs. HTS 8431.43.80.90 covers these as essential parts for other boring machinery under 8430.41/8430.49.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If designed for self-propelled boring machinery
Parts for 8430.41 self-propelled rigs fall under specific 8431.43.10 provision.
If sold separately without rig context
Standalone transmission shafts classified as machinery parts by function in Chapter 84.
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Import Tips & Compliance
• Include engineering drawings showing splined connections unique to rotary sinking systems
• Obtain manufacturer's declaration linking to 8430.41/8430.49 rig models
Related Products under HTS 8431.43.80.90
Spider Valve Assembly for Pipe Racks
Mousehole spider valves controlling pipe rack access during tripping on drilling rigs. Boring machinery parts under 8431.43.80.90.
Crown Block Sheave for Drawworks
High-capacity sheaves for crown blocks in drawworks systems handling heavy loads during sinking. Fits 8431.43.80.90 parts definition.
Traveling Block Hook Load Cell
Strain gauge load cells integrated in traveling block hooks for real-time weight monitoring during sinking. Principal use parts HTS 8431.43.80.90.
Mud Pump Piston Assembly for Drilling Rigs
High-pressure piston assemblies for mud circulating pumps on boring rigs, essential for removing cuttings during sinking. Classified under 8431.43.80.90 for parts of 8430.41/8430.49 machinery.
Drill Pipe Stabilizer for Well Sinking
Hardfaced steel stabilizers mounted on drill strings to center tools during borehole sinking in oilfield operations. Fits HTS 8431.43.80.90 as parts of other boring/sinking machinery per statistical notes.
Casing Pipe for Oil Well Drilling Rig
Steel casing pipes used in oil well drilling rigs to line boreholes and prevent collapse during sinking operations. Classified under HTS 8431.43.80.90 as parts for other boring or sinking machinery of heading 8430.41/8430.49, specifically for stabilizing wells in petroleum exploration.