HDD Shielding Tunneling Mud Recycling System

A whole drilling fluid solid control system contain 5-7 mud tanks, agitators, mud guns, centrifugal pumps, shale shaker, vacuum degasser, desander, desilter, decanter centrifuge, hopper and connection pipes.

The equipment on 1-2 tanks, and others are only mud tanks with agitators. 

Separation detail:
Mud tank type: Square type, shell is corrugated type, thickness is 6mm, bottom has base like boat. the valves are butterfly valves, inlet pipe is 6" and discharge pipe is 8". Each tank has three sand discharged gates. One the surface of mud tank, there are 500mm width passage, guardrail, ex-plore lights for working at night. 

Agitator: Each cabin has one set horizontal mud agitators, impeller type is propeller type. Two layers.

Mud gun: Can clean the mud tank and agiators with 360 degree swivel.

Centrifugal pump: Between tanks, there need centrifugal pump, supply fluid for shale shaker, desilter etc also need centrifugal pump.

Shale shaker: Linear motion shale shaker, two sets usually. The drilling fluid from well head first go into the shale shaker to remove the bigger size. Shale shaker has big treating capacity.

Vacuum degasser: Remove the gas from drilling fluid after the shaker, the vacuum motor is 4KW. 

Desander and desilter: The separation size is smaller, after the shale shaker, the drilling fluid will go to a second and third separation process. The smallest size is 12-47 micron meters.

Decanter centrifuge: Usually choose middle speed decanter centrifuge, in working, middle speed is enough, the size is 5-7 micron meters. And middle speed has low cost and keep work long life.

Hoppers: Venturi hoppers. The hopers with centrifugal pump on one base can combine a Jet Mud Mixer. It is used to add bentonite and other chemicals.

Pipes: Pipes are very very important for solids control system. So when choose the solid control system, we first choose the inner pipe's towards. The fluid inlet, return etc.