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API 7-1 4145&Non-mag Drill Collar
Drill Collar is manufactured from AISI 4145H modified quenched and tempered steel and is heat treated along its entire length for uniform toughness and durability. Strict metallurgical tests are performed per specifications to ensure that the heat treatment produces consistent and maximum hardness through the depth of the bar.
Landrill supplying drill collars in standard and spiralled from 3-1/8” OD up to 14” OD in accordance with API, NS-1 or DS-1 specifications.
Room 703 Building B, Greenland center, Hi-tech development zone Xi’an, China
86-13609153141
