Impression Block
An impression block is a lead-filled tool dropped into oil or gas wells to capture impressions of downhole obstructions for analysis and fishing tool selection. It is classified under tariff item 8430.49.00 as other boring or sinking machinery for earth, minerals or ores, as specialized boring diagnostic equipment.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If imported as a part of boring machinery
Parts for boring or sinking machinery are classified separately under this heading.
If imported as a lead article without the tool body
Articles of lead are classified in Chapter 78 when not part of a complete machine.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Classify the impression block as a complete tool with its lead filling included
• Provide evidence of its use in wellbore inspection to support the tariff classification
• Confirm the lead content does not trigger any special import requirements
Related Products under Tariff item 8430.49.00
Auger Boring Machine
An auger boring machine is a rotary drilling rig that uses continuous flight augers to bore horizontal holes through soil for pipe jacking in sewer construction. It falls under tariff item 8430.49.00 as other boring machinery for earth, distinct from pile drivers or extractors.
Casing Running Tool
A casing running tool is a hydraulic-powered machine used to install and run steel casing pipes into oil or gas wells during drilling operations. It falls under tariff item 8430.49.00 as other boring or sinking machinery for earth, minerals or ores, specifically for oil and gas field drilling.
Compliant Tower Drilling Platform
A compliant tower drilling platform is a deepwater offshore structure with a flexible steel design that moves with waves, used for extracting oil or gas from beneath the seabed. It falls under tariff item 8430.49.00 as other boring or sinking machinery for minerals, specifically for offshore drilling operations.
Core Drill Rig
A core drill rig is a portable diamond core drilling machine used to extract cylindrical earth or rock samples for geotechnical investigations. It falls under tariff item 8430.49.00 as other boring machinery for earth, specialized for sampling rather than production excavation.
Deepwater Horizon Semi-Submersible Drilling Platform
A semi-submersible drilling platform is a floating offshore structure with drilling rigs, mud systems, and living quarters, designed for deepwater oil extraction. It qualifies under tariff item 8430.49.00 as other boring machinery for minerals, specifically for offshore drilling.
Directional Boring Locator
A directional boring locator is a walkover guidance system with a sonde transmitter used to track the path of an underground boring head. It falls under tariff item 8430.49.00 as part of a boring system, despite being primarily a guidance device, because it is integral to the boring operation.