GJC45-21 cementing unit is equipped with a horizontal single function triplex plunger pump. When the truck is working, the triplex plunger pump is driven by diesel engine above the chassis. When the truck is driving, the triplex plunger pump is driven by diesel engine under the chassis. Truck operation system can be realized by circuit system, hydraulic pressure system, pneumatic system and mechanical transmission system. All controlling of GJC45-21 cementing unit is focused on the console and can be operated by only one person. Besides, operation is automatic, convenient and reliable. 

GJC45-21 cementing unit is mainly used in deep, middle and shallow oil-field. It can complete the fracturing work itself, such as self-help mud slurry, self-help mud injection, self-help mud replacement, etc. It can also be used in washing wells, shallow well work, and so on. The greatest strength of the truck is that using only one car can realize the work where well depth is in450m. Applicable temperature rang is between -40 to50 °C