mixing hopper

Normally, the drilling mud recycling system is consisting of mud recycling tank skid and mud mixing tank skid. On
the mud recycling tank skid, the solids control equipment like shakers, mud cleaner, and even decanter centrifuge unit will be installed for removing the cuttings and useless solid particles in the drilling fluids. After several times recycling, the useful mud materials will loss together with the cuttings, and then the mud engineer need add new mud materials into the drilling fluids to maintain the proper mud property for the drilling job. The mud mixing unit is the equipment used for adding the mud materials into the fluids.

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Mud Mixing Hopper

What is the Function and Principle of the Mud Mixing Unit
The mud mixing unit is always installed at end of the mixing tank. Before starting the drilling, the driller need have sufficient drilling mud to keep a continuous drilling. Thus at the first, the mud mixing unit is used to make the drilling mud by mixing clean water and mud materials. With the drilling going on, once the mud property is not proper for the drilling process, new mud materials like barite or other polymers need to be added into the drilling fluids. The mud mixing unit is sucking the drilling mud from the mixing tank, and then pump the mud together with materials back again into the mixing tank. Normally, the mud agitators would be equipped on the mixing tank for fully blending.

What Components are Included in the Mud Mixing Unit
1. Centrifugal Pump – the inlet of the pump is connected with the mixing tank for sucking the drilling mud from tank. And the outlet is connecting with pipe manifold that will transfer the mud to the hopper unit. As this pump is fixed with the mixing hopper, it is also called mixing pump. This pump is driven by an electric motor via direct shaft connection. By higher efficiency shearing purpose, GN will used belt driving for a shearing pump.

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Mixing Hopper Bag Breaker

2. Mud Hopper – GN’s mud hopper is Ventri type connected with the pipe manifold via a T pipe. The mud materials will be added into the hopper and then immediately sucked into the drilling fluids as there is a vacuum produced by the high speed flow. For the hopper, GN uses the material of stainless steel for better anti corrosion performance and long life time. Inside the hopper, there is a bad beaker for quickly adding of powders. On the pipe manifold, there is a pressure gauge for the operator to inspect the working pressure of the mixing pump.
3. Control Panel – GN’s mud mixing unit is equipped with explosion proof control panel for application in Zone 1. The operation of the control is easy for only three buttons on the panel. One on, one off and one for emergency stop, accordingly, the signal lights is installed to reflect the operation.

GN’s mud mixing unit could be installed both at the end of the mixing tank or separately mounted on a small skid. This mud mixing unit can also be designed as a dual hopper dual pump type for larger capacity or in case one of them is broken down.

Last week, GN’s manufacturing department finished the fabrication of a mud mixing tank with double hoppers. Mud mixing tank is widely used in the drilling mud recycling system for mixing and re-configuration the drilling fluids. Also sometimes it will be used for storage the active drilling fluids.

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mud mixing tank system

A mud mixing system is always consisting of mixing tank, agitators, mud guns, mixing pump and mud hoppers. Generally, the mixing pump and the mud hopper will be located at one end of the mud tank to make the mixing tank system a compact and single unit, while in some projects, the mixing pump and hopper are installed on a separate skid so that the mixing tank and the jet mud mixer could be used much freely. The picture in this article shows that the jet mud mixer skid was located at one side of the mixing tank. There are one mixing pump and 2 mud
hoppers on the skid. The mixing pump is connected with both hoppers, one of the hoppers is used for mixing barite to make weighted drilling fluids, and the other one is used for adding bentonite into the drilling fluids.
There is a steel frame around second hopper with steel bars over the hopper. This horizontal steel bar is used to hang the bentonite bag which will be hooked at 4 corners of the steel frame to make it easier for adding the bentonite powder into the hopper. It is worthy to mention that the steel bar is with forklift lifting slot so that the bar with bentonite bags could be lift and put on the frame by a forklift to save human power.
This mud mixing system is with a control panel to control mixing pump which could transfer mud to both hoppers. On the mixing tank, there is another charge pump which is used to transfer the active mud back to the rig for reuse.