The leading factor products SL3NB, QZ3NB, QF、QZ series drilling mud pump and compound drive groups are mainly used in oil field and geological prospecting for well drilling、well workover、cementing、water shut off、water flooding and sending mud, clay, grout and so on. Among them the SL3NB-1300A and SL3NB-1600A models are large powers well drilling pumps which are the first to be studied and produced and also make up the domestic blank space. They got the national third prize on progress of science and technology, the first prize on technical progress of Petroleum Industrial Department, and the second prize on the new product of Shandong Province. They were extended the first products which replaced imports by the Machinery Committee of china.