We are Dongying East International Trading Co.,Ltd , which is one of the wholly-owned subsidiaries of Sinopec and professional oil equipment supplier .We are located in China's second largest oil filed --Sinopec Shengli Oilfield, China

Drill Collar

 1) Standard: API 7

 2) Raw Materials: AISI 4145H

 3) OD: 3 -1/8, 3-1/2, 4-1/8, 5 ,6 ,6-1/4 ,6-1/2 ,6-3/4 ,7 ,7-1/4 ,7-3/4 ,8 ,8-1/4 ,9 ,9-1/4 ,9-3/4 ,10 ,11,

 4) Length: 9150mm---9450mm

Contact us  : qinyunpetro (AT) gmail(DOT)com