The center of the drill pipe is hollow, allowing drilling mud to be pumped out and circulated through the annulus during oil drilling. The size, grade, and quantity of water well drill rods depend on the design of the well to be drilled and the underground geological conditions.Geological Drilling Pipe
Geological Drilling Pipe We use surface nitriding treatment on the entire drill pipe, which not only extends the service life of the threads, but also prolongs the service life of the body. We can also provide forged and friction welded drill rods.
Standard ：API SPEC 5DP、API SPEC 7 和 ISO9001
Raw materials ：E75、X95、G105、DZ50、E75、R780、X95、G105、S135
Outer sizes ：50 mm、60 mm、76 mm、89 mm、95 mm、102 mm、114 mm、127 mm、140 mm、159 mm。
Thread size ：API Reg 2 3/8”, 2 7/8”, 3 1/2” 4”, 4 1/2”, 5”, 5 1/2” ，6 5/8”
Wall thickness ：5.5/6.5mm/7.5/8.5mm/10mm
