The water based mud drilling cuttings treatment solution including cuttings solidification unit and waster based mud drilling cuttings treatment system.
High G drying shaker is core equipment for primary solids control and drying the water based cuttings, to meet the requirement of final disposal and recover more base fluids. The features of high G drying shaker is that high G force adjustable up to 8 G, flexible feeding method such as weir feed, top feed and hopper feed, mechanical deck angle adjustable while working from -1 to 5 degree. The high G drying shaker can lay under the primary shale shaker directly to collect the water based drilling cuttings from primary shale shaker. Or it can lay on a separate mud tank, to collect drilling cuttings from screw conveyor or waste vacuum pump.
The working process of high G drying shaker system is as below:
The screw conveyor collect the water based drilling cuttings from primary shale shaker and transfer to high G drying shaker, which is lay on the fluids catching tank, the centrifuge feeding pump feed the fluids to waste decanter centrifuge for fine solids separation, the fluids flow to intermediate tank, the clean fluids can be transferred to solids control system storage tank or mud mixing tank by adding chemical additives. The discharged solids together with the separated cuttings from desander, desilter and decanter centrifuge will be transferred by screw conveyor to solidification unit, by adding lime and absorber and mixed in the high shear vessel. The mixed solids can be final disposal without damage to the environment.
With chemical dosing unit, the dewatering centrifuge can separate the ultra fine solids up to 1 microns, the clean water can be sent to waste water treatment facility for disposal or recovery to solids control system for drilling rig reuse.
As a drilling waste treatment equipments manufacturer in China, GN Solids Control produce drilling waste treatment equipments for both OBM, SOBM and WBM, including vertical cuttings dryer, waste decanter centrifuge, screw conveyor, high G drying shaker, waste vacuum pump, cuttings transfer pump, centrifuge feeding pump, fluids catching tank, etc.
Vertical cuttings dryer is the ideal equipment to recover base fluids from oil based drilling waste, reduce the amount of OBM or SOBM on cuttings and reduce the waste volume to meet environmental objectives. Reduce fluid content prior to further treatment, thereby increasing process capacity.
The working process of vertical cuttings dryer system is as below:
The screw conveyor collect the OBM drilling cuttings from primary shale shaker, and transfer the drilling cuttings and discharged out from screw conveyor outlet port to vertical cuttings dryer feeding port, the vertical cuttings dryer will take away the oil and water from the cuttings which will be discharged from VCD discharge port, the fluids will flow into the intermediate tank , and the centrifuge feeding pump will feed the fluids to waste decanter centrifuge for further treatment, the separation cut point is 2 ~ 5microns, most of the fine solids bigger than 5 microns will be separated out, and the treated fluids can be recovery by adding chemical additives, or the fluids flow to a fluids catching tank with dewatering centrifuge and chemical dosing unit for further treatment, the purpose is for final disposal of the fluids.
A zero discharge drilling cuttings treatment system including solids control system and drilling waste management system, which is working in closed loop to prevent the drilling waste splash in the ground and no need to dig a waste pit in the earth. The solids control system including primary shale shaker, desander, desilter, decanter centrifuge, the drilling waste treatment system including screw conveyor, vertical cuttings dryer, decanter centrifuge , fluids catching tank and skid.
GN Separation Equipment Co., Ltd（GN Separation）is wholly-owned subsidiaries company of Hebei GN Solids Control Co., Ltd. The Mining Business Department of GN separation focus on for the development and producing of mining vibrating screening equipment. Except for stack vibrating screen-fine sizer, medium mining vibrating screen, GN separation also develop large double deck mining vibrating screening equipments, including the series as below:
1. Large double deck Linear vibrating screen, we have single deck large linear vibrating screen and double deck large linear vibrating screen, the handling capacity of materials with the same size and different working conditions varies greatly.
2. Large double deck Banana vibrating screen, it is mainly used in dry and wet classification, desliming, demineralization and others. The inclination angle of the screen surface at the feeding end is big, which lead the materials to be treated move faster. When the user decrease the inclination of the screen surface, the flow rate will be reduced, which improve the screening probability and improve the screening efficiency.
3. Large double deck Flip Flow vibrating screen
The above mining vibrating screen adopted polyurethane screen panel with coarse screening and fine screening.
GN polyurethane screen panel – coarse screening with screen panel opening 0.2 ~ 30mm, it is made of polyurethane wrapped metal skeleton, with features of good wear resistance and strong corrosion resistance, but lack of high temperature resistance and good conductance.
The fine mesh polyurethane screen with screen panel opening is 0.045mm ~ 2mm, with high strength, high elasticity, high wear resistance, but conductance is not so good.
Another type mining screen is metal gap screen panel – coarse screen (opening 0.2 ~ 30mm) and stainless steel wire mesh screen – fine screen ( opening 0.038 ~ 2mm).
For more information about GN large mining vibrating screen, pls contact with GN Separation.
Recently one unit of triple shale shaker is ready for shipment to a drilling company in China. The 3 units of shale shakers are installed on one skid for convenient installation and transportation. Each shaker with its buffer box, and the triple shale shaker with a possum belly for mud pipeline connection.
GN conventional triple shale shaker can be updated to vacuum screen technology for option if the client need to improve the separation efficiency, recover more drilling fluids and get drier drilling cuttings. The ViST pan is installed under the last screen ( at cuttings discharge end) of the shale shaker, a suction hose is connected to ViST vacuum unit, the compressed air creates suction on the last screen surface, pulling additional fluids off the cuttings, the liquid on the cuttings can be reduced 30%~ 50%. The vacuum screen technology increase the volume of recovered and reused fluids and produce drier cuttings. Once the drilling waste volume is reduced, more drilling fluids will be recovered, it will reduce the drilling cost for drilling company client.
The single shale shaker with splash proof cover to prevent drilling fluids splashing, the control panel is installed on one side of possum belly for convenient operation. The feeding drilling fluids received from wellhead will flow to 3 shale shakers evenly for better drilling fluids separation. The solids discharge way can be bottom discharge and side discharge for option. 2ea vibration motors produce high vibration G force up to 7.6G which drived the shale shaker vibration in linear motion, the patent design deck bottom sealing rubber strip provide better sealing performance, to prevent fluids leakage to mud tank. The composite material shaker screen is installed on the shale shaker for longer working life, and reduce the time and cost to replace damaged shaker screens.