January 10 2018

Last week, GN finished the order from CNPC on manufacturing vertical cuttings dryer and decanter centrifuges. This week, another order from CNPC on one set drilling cuttings solidification unit has been completed the delivery inspection, soon later, it will be shipped to CNPC’s site for application.
Solidification unit is a kind of equipment used for final treatment of drilling cuttings. With the strict environmental protection regulations issued, most of the rig site has to further treat the drilling cuttings to reduce the waste discharge and recover drilling fluids as much as possible. The further treated drilling cuttings, due to containing of chemicals, cannot be discharged directly.

The solidification unit is an ideal equipment for final disposal of the water based drilling cuttings.

After several times communication and availability verification, GN designed and finished the fabrication of this customized solidification unit for CNPC. This unit includes below several parts:

1. Cuttings collection part --- cuttings collection part is consisting of a hopper and screw conveyor. The hopper is used to collect the drilling waste cuttings discharged from solids control equipment and waste management equipment, and then the cuttings transferred by the screw conveyor under the hopper to the mixing vessel.
2. Chemical storage part --- the chemical storage part has 2 separate storage tanks. One of them is used to store the curing agent; the other tank is for desiccant. Both of the tanks are equipped with screw conveyors for transferring the chemicals to the mixing vessel. Chemical bags can be put on top of the both tank for easy feeding into the tank.
3. Mixing vessel --- Drilling cuttings and chemical are transferred to the mixing vessel at the same time and the mixed together. Hazardous materials like heavy metal ion, toxic organic compounds could be encapsulated in the insoluble blocks. Then the drilling cuttings could be discharged for land fill on site or transferred to other place for making construction material.

All the 3 conveyors in the solidification unit are PLC design automatically controls, and the feeding rate could be adjusted via the panel as per pre-set ratio. Mixing vessel discharge port also automatically opens and closes as per mixing condition. GN also equipped the hydraulic lift platform and belt conveyor for chemical bags lifting and cuttings discharging. For more information on waste management equipment, please feel free to contact with GN.