SL3NB series mainly include SL3NB-1300 and SL3NB-1600. Both of 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. SL3NB series drilling mud pumps are advanced at structure, operation steady, weight light, the small volume, low speed, long stroke; Have the well imbedibility; wearing parts of long service life.

SL3NB-1600's specification is as follow:
Model : SL3NB-1600
Type: Horizontal triplex single acting piston pump
Rated power: 1600HP （1194KW）
Stroke Length: 305 mm305 mm
Rated speed: 120 SPM
Gear Ratio: 4.194
Suction inlet: Φ300 mm
Discharge outlet: Φ102 mm
Weights: 27100 Kg

SL3NB-1300's specification is as follow:
Model : SL3NB-1300
TypeHorizontal: triplex single acting piston pump
Rated power: 1300HP （956KW）
Stroke Length: 305 mm
Rated speed: 120 SPM
Gear Ratio: 4.194
Suction inlet: Φ300 mm
Discharge outlet: Φ102 mm
Weights: 20800 Kg