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The thermal compensator is a key tool in oil drilling and completion operations, mainly used to compensate for the tensile and compressive stresses caused by temperature changes in the tubing string, preventing buckling, fracture, or sealing failure of the casing or tubing under high temperature and high pressure conditions, thereby ensuring the structural integrity of the wellbore.

Casing couplings and tubing couplings are core connectors in petroleum drilling, completion, and production strings. They are used for threaded connections of casings or tubing of the same specifications, ensuring the sealing, strength, and continuity of the string, and are key guarantees of wellbore structural integrity.

The casing scraper is a key tool in oil drilling and well servicing operations, mainly used to remove cement residue, hard scale, rust, or deposits from the inner wall of the casing, ensuring the smooth passage of subsequent tools and operational safety.

The casing pressure test plug is a key tool in oil drilling, completion, and workover operations, specifically used for sealing and pressure testing the casing string to verify its pressure-bearing capacity and sealing performance, ensuring wellbore integrity meets safety standards.

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