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Recovery envelope checker
Enter your fish and well figures. This checks them against the four dimensions that decide recovery — clearance, pull, temperature and connection — across the China Welong fishing and milling line.
Line supplies rotary-shouldered API connections gauged to API Spec 7-2.
Indicative only. Tool outside-diameter band across the line is 79–425 mm; jar tables are rated to a 150 °C highest working temperature. China Welong verifies every envelope in-house against your casing and fish data before quoting.

![Choke & Kill Hose: [Field Guide]](https://welongoiltools.com/wp-content/uploads/2026/07/choke-kill-hose-guide-featured-1-150x150.png)


