Of offshore oil and natural gas drilling and production platforms
Parts suitable for use solely or principally with the machinery of headings 8425 to 8430: > Of machinery of heading 8426, 8429 or 8430: > Parts for boring or sinking machinery of subheading 8430.41 or 8430.49: > Of offshore oil and natural gas drilling and production platforms
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.05, 9903.88.06, 9903.88.07, 9903.88.08, 9903.88.10, 9903.88.11, 9903.88.14, 9903.88.19, 9903.88.50, 9903.88.52, 9903.88.58, 9903.88.60, 9903.88.62, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(b) [to this subchapter]
Products classified under HTS 8431.43.40.00
BOP Stack Assembly for Offshore Platforms
A blowout preventer (BOP) stack assembly is a critical safety component designed specifically for offshore oil and natural gas drilling platforms under HTS 8431.43.40.00. It consists of multiple ram and annular preventers mounted on a manifold to seal the wellbore during drilling operations on floating or fixed platforms. Classified here as a part solely for boring machinery of subheading 8430.41 or 8430.49 used offshore.
Offshore Drilling Riser Joint
A marine riser joint connects sections of the riser string used in offshore drilling platforms to convey drilling fluid and guide tools between the rig and subsea wellhead (HTS 8431.43.40.00). These high-pressure, corrosion-resistant pipes are engineered for deepwater environments on platforms using 8430.41/8430.49 boring machinery. Essential for maintaining well control during offshore operations.
Subsea Wellhead Connector
A high-pressure subsea wellhead connector mates the offshore platform's blowout preventer stack to the subsea wellhead in oil and gas drilling operations (HTS 8431.43.40.00). Designed for extreme deepwater pressures and remote operation via ROVs on 8430.41/8430.49 platforms. Classified as a principal part for offshore boring machinery.
Offshore Derrick Crown Block
The crown block is the fixed sheave assembly at the top of an offshore drilling derrick/platform, guiding the drilling line for hoisting operations (HTS 8431.43.40.00). Built to withstand extreme loads on floating production platforms using 8430.41/8430.49 boring equipment. A principal mechanical part for offshore oil/gas drilling rigs.
Platform Tensioner Cylinder Assembly
Hydraulic tensioner cylinders maintain constant tension on offshore drilling risers to compensate for vessel heave motion on floating platforms (HTS 8431.43.40.00). Integral to 8430.41/8430.49 boring machinery for deepwater operations. Classified as parts solely for offshore oil and gas production platforms.
Top Drive Gearbox Module
The gearbox module within an offshore top drive system transmits power to rotate the drill string on oil/gas platforms (HTS 8431.43.40.00). Designed for harsh marine environments and high-torque requirements of 8430.41/8430.49 boring rigs. A key power transmission part solely for offshore drilling.
Mud Pump Fluid End Section
The fluid end section of high-pressure mud pumps circulates drilling fluid through offshore platform systems for 8430.41/8430.49 boring machinery (HTS 8431.43.40.00). Contains pistons, valves, and liners exposed to abrasive drilling mud at 5,000+ psi. Exclusive to offshore oil/gas drilling platforms.
Offshore Drawworks Brake Drum
Heavy-duty brake drum for drawworks hoisting systems on offshore drilling platforms, controlling descent of drill strings (HTS 8431.43.40.00). Engineered for dynamic braking loads exceeding 1M lbs on 8430.41/8430.49 rigs. Principal safety component for offshore boring operations.
Swivel Hose High-Pressure Assembly
High-pressure swivel hose connects the rotary swivel to mud hoses on offshore platforms, allowing drill string rotation while conveying drilling fluid (HTS 8431.43.40.00). Rated 5,000-10,000 psi with marine-grade reinforcements for 8430.41/8430.49 boring. Essential flexible connection part for offshore rigs.
Kelly Drive Bushing
Precision-machined bushing that engages the square kelly bar in offshore platform rotary tables, transmitting torque to the drill string (HTS 8431.43.40.00). Made from hardened alloy steel for 8430.41/8430.49 boring machinery in marine environments. Core rotary drive component for offshore drilling.
Offshore Pipe Racking Finger
Hydraulic pipe racking fingers grip and move drill pipe stands vertically on offshore platform pipe racks for tripping operations (HTS 8431.43.40.00). Engineered for 8430.41/8430.49 boring rigs with marine coatings. Integral handling part for offshore drill pipe management.
Master Bushing Insert for Offshore Rotary Table
Replaceable insert for master bushings in offshore platform rotary tables, supporting kelly/spider drive during drilling (HTS 8431.43.40.00). Hardened steel with square drive hole for 8430.41/8430.49 rigs. Wear part exclusive to offshore boring rotary systems.
Iron Roughneck Torque Wrench Jaw
Replaceable jaw inserts for iron roughneck make/break tools on offshore platforms, gripping pipe connections during tripping (HTS 8431.43.40.00). Hardfaced for 8430.41/8430.49 boring rigs. Critical torque application part for offshore pipe handling.
Catwalk Pipe Skidder Arm
Hydraulic skidder arm transfers pipe from catwalk to V-door on offshore platforms for mousehole operations (HTS 8431.43.40.00). Designed for 8430.41/8430.49 boring machinery pipe handling. Key automation part for offshore rig floor efficiency.
Spider Slip Bowl Insert
Hardened insert for spider slip bowls that grip stationary drill pipe in offshore platform rotary tables (HTS 8431.43.40.00). Configured for drill pipe/casing OD ranges on 8430.41/8430.49 rigs. Essential well control/pipe support part for offshore drilling.