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4145H Spiral Drill Collar | API 7-1
Key words:
Type B spiral drill collar, featuring right-hand helical grooves. It reduces contact area with the wellbore wall, minimizing differential sticking while maintaining drilling‑weight transmission and structural rigidity. Compliant with API 7‑1 standards and available in custom sizes.
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We can customize high-performance drill pipe assemblies of various sizes according to customer needs.
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052260, East of Beikou, Yingli Town, Jinzhou County, Shijiazhuang City, Hebei Provice, China.
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