01 / 02A wear-reduction sub fitted with a reinforced-PTFE sleeve. The self-lubricating sleeve lowers contact friction and protects casing in high-angle and extended-reach sections.
| Wear-sub model | Working sleeve OD | Applicable casing OD | Length | Connection model |
|---|---|---|---|---|
| (F = non-metallic, | （mm） | (mm) | (mm） | Connection model |
| Connection model | ||||
| J = metallic) | Connection model | |||
| F(J)K146 | 142-146 | 177.8 | 770-790 | NC38 |
| F(J)K150 | 155-156 | 193.7 | 770-790 | NC46 |
| F(J)K206 | 175-210 | 244.5 | 940-960 | NC50 |
| F(J)K260 | 260-300 | 339.7 | 1040-1060 | 5 1⁄2"FH |
The replaceable working sleeve is manufactured from reinforced PTFE; metal-sleeve variants are also identified by the model code.
Used to reduce casing and drill-string wear during directional and extended-reach drilling.
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Material and treatment options are selected around pressure, load, corrosion, wear, temperature and sour-service requirements.
Inspection planning can include dimensional checks, material documentation, assembly review and product-specific pressure or functional testing.
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