DRILL COLLAR Our drill collar strictly follow API Spec 7-1 requirement.The drill collars are made of 4145H modified chromium molybdenum alloy steel. All threads are phosphated, copperized or cold....
Shandong Everbright Foreign Trade Co., Ltd is located in Dezhou City, Shandong, China. With 15 years experience of international trade, we have opened broad oversea market. At present, the two main....
API Petroleum Casing 1) Grade: J55, K55, L80, N80, P110 and other 2) End Finish: Plain end; Short round thread; Long round thread; Buttress thread 3) OD and WT: as customer request. 4) Packing: Standard....
Seamless steel pipe with best quality and best price