SY/T 7665-2022 "Technical Conditions for Alloy Platings on the Inner Surface of Drill Pipes" specifies the manufacturing process, technical requirements, inspection methods and identification requirements for Eletroplating nickel-tungsten alloy platings and electroless nickel-phosphorus platings on the inner surface of drill pipes. This standard applies to various types and specifications of drill pipes that comply with GB/T 29166, SY/T 5561 and API Spec 5DP, as well as non-standard drill pipes designed and produced by the manufacturer. The content of the document includes the preparation of coatings, acceptance rules, and Encasement and transportation requirements. The implementation of SY/T 7665-2022 helps to improve the corrosion resistance and service life of the inner surface of the drill pipe, in line with the demand for high-mass drilling tools in the oil and gas industry.