Month: October 2021

Recently GN produced HDD mud reclaimer for international drilling company are ready for shipment, including 2 sets of GNMS-500D desander unit, 1 set of mud mixing tank, 1 set of dual deck shale shaker. The technical configuration is as below:

2 sets of GNMS-500D desander unit: this model is the widely used for HDD mud recycling, TBM slurry desanding, piling slurry cleaning works. It is a compact design mud cleaning unit, which can be used when treatment result of solids separation cut point 45 microns is acceptable, and space is very limited, and budgetary is limit, the user do not need a desilter cone treatment ( the solids cut point is 20 microns) or they can prepare for an extra desilter or decanter centrifuge as further treatment. Normally when GNMS-500D desander unit is applied, the user will make a storage tank or mixing tank with mixing hopper and mixing pump locally, the clean fluids discharged from the desander unit will flow to the mixing tank directly, it will be used to prepare for new drilling fluids for reuse purpose. The desander unit including a double deck shale shaker with hydrocyclones, centrifugal pump, catching tank, electric control system with pipelins, tank accessories.

The mixing tank is customized design , which consist of 2 venturi hopper with 2 mixing pump installed on the skid.
The double deck shale shaker working principal is as below:
A slurry pump pick up the HDD slurry from mud pit to the feed port and flow to the buffer tank, the coarse solids will be separated by the top layer shaker screen, the fluids drop down on the bottom screen for drying and collect more useful fluids. The clean fluids will drop down into the mud tank and the solids are separated out.

If you need HDD mud reclaimer, pls contact with GN solids control.

Recently one unit of oil based drilling cuttings treatment system are shipped to China ES company. The system including one unit of GNCD930F vertical cuttings dryer, one unit of GNLW363C-VFD decanter centrifuge, with skid and screw conveyor, etc. components.

This drilling cuttings treatment system is mostly applied for oil based drilling cuttings treatment, for water based drilling cuttings, we will suggest different system to treat, like high G drying shaker, decanter centrifuge with dewatering unit. When the vertical cuttings dryer is used to treat water based drilling cuttings, the screen basket is easily blocked, you have to flush it very frequently, the treated solids will be with more moisture, which will influence the treatment result.
The screw conveyor is used to transfer the drilling cuttings from solids control system / waste pit to vertical cuttings dryer. Sometimes we will use the excavator to dump the waste into a big collection hopper, which will drop down into the obliquely installed screw conveyor directly, the screw conveyor will transfer the drilling cuttings to vertical cuttings dryer feed port on the top of the machine. Another feeding method is that when the drilling cuttings treatment system is installed on the rig site, besides the solids control system, one screw conveyor which is horizontally installed will collect the drilling cuttings from primary shaker, mud cleaner, the cuttings are discharged to another obliquely installed screw conveyor through the discharge port, the cuttings are feed to vertical cuttings dryer by the #2 screw conveyor.

The cuttings are feed into the feed port of the vertical cuttings dryer, the screen basket trap the wet solids and accelerate the speed to 900rpm ( the user can input the speed from the control panel) and G force is up to 420G, the liquid passed through the screen opening, the solids are extracted by the rotor flights, the rotor assy rotate slower than bowl, the solids are discharged from discharge port.