Entry Sub for Drilling Bumper Sub Kelly API Drill String Adapter

The drill string adapter is made of AISI4145H Cr-Mo steel and follows API Specifications. The Company can produce same-diameter, reducing and left lateral drill string adapters and can perform cold rolling, coppering or phosphating of threads.

The Company possesses a complete set of petroleum drilling tool production lines and mainly produces large deep-hole boring machines, ordinary lathes, CNC lathes, mill, printer, etc. The Company has established a dedicated testing center that is equipped with domestic and overseas advanced precision testing equipment and sound testing means to control the whole process of products and strictly abides by API 7-1, API 7-2, SY/T5144 and SY/T5146 standards to ensure that all performance indexes of the Company’s products can meet international standards and standards of American Petroleum Institute (API). The Company has passed IS09001 quality management system certification and HSE management system certification and has obtained the right to use the logos of API petroleum drilling tools. Main drilling tools include non-magnetic drill collar, non-magnetic pressure drill pipe, ordinary drill collar, integrated heavy weight drill pipe, adapter, etc. The annual production capacity is 10,000 pieces. The Company can also machine products according to special requirements of users.

Note: When the diameter difference of the drill tool connected by the conversion joint is greater than 15mm(except for the water conversion joint and the fishing conversion joint), the A or B conversion joint can be used when the well depth is less than or equal to 2000m; the B conversion joint should be used when the well depth is greater than 2000m.

Xi'an RIG– Global Provider of Integrated Petroleum Drilling Equipment Solutions‌

Xi'an RIG Oilfield Equipment Co., Ltd is a China-based supplier headquartered in Xi’an, Shaanxi Province, specializing in end-to-end drilling equipment solutions for international oil & gas drilling operators, service companies, and EPC contractors worldwide.
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The company offers a comprehensive range of API-compliant drilling equipment, including:

‌Drilling Rigs & Hoisting Systems‌: Petroleum Drilling Rigs, Workover Rigs, Top Drive, Drawworks, Clutches, Traveling Block, Hook
‌Well Control & Wellhead‌: Blowout Preventers (BOPs), Wellhead Equipment, Wellhead Tools
‌Mud & Cementing Systems‌: Mud Pumps, Solids Control Equipment, Cementing Units, Cementing Tools
‌Specialized Downhole & Completion Tools‌: Fracturing Pumps, Coiled Tubing Units, Downhole Tools, Perforating Guns, Wireline Tools
All products are manufactured to meet ‌API 6A, API 7K, and API 16A‌ international standards, ensuring operational safety and reliability under extreme downhole conditions.
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Xi'an RIG sources its equipment exclusively from China’s leading oilfield equipment manufacturers, including:‌BOMCO MACHINERY‌,‌LS HEAVY EQUIPMENT‌ ,‌HONGHUA GROUP,SJ PETROLEUM,RG PETRO-MACHINERY‌

This vertical integration ensures traceable quality, consistent performance, and rapid spare parts availability.
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With established presence across ‌Middle East, Africa,Latin America, Southeast Asia,and the CIS region‌, Xi'an RIG delivers:

Customized Equipment Configurations‌
‌24/7 Remote Technical Support & Diagnostics‌
‌Extended Warranty Terms‌ (up to 36 months on select equipment)
‌On-Site Installation & Operator Training‌
Driven by a commitment to ‌professionalism, accountability, and high value‌, Xi'an RIG is trusted by over 200 international clients as a reliable partner in energy infrastructure development.