联系人 Ms. sun
xuelian, Tianjin, Tianjin
The drill pipes are conformed to API 5D, API SPEC 7. The material of drill pipe body is up to the 1&3 group of API 5D.(Group ***-grade E*5;Group ***-grade X*5, G**5, S**5 ) The matching tool joints are according to your requirements which are up to API standards.
