Month: March 2022

Chemically Enhanced Centrifugation, flocculation, is to enhance the remove of fine solids in WBM by a decanter centrifuge.GN solids control produce different size decanter centrifuge, including 9 inch, 14 inch, 18 inch, 22 inch, 30 inch diameter bowl, also different bowl length to meet different treatment requirement. We also provide chemical dosing unit together with decanter centrifuge working, especially for water based mud drilling waste treatment which is discharged from high G drying shaker, the chemical enhanced centrifugation can improve the centrifuge working efficiency and get better treatment result.
The benefits to use chemical enhanced centrifugation process is as below:

1. Reduce water consumption and increase recycling of recycled water
2. Reduce the volume of the mud pit, if there is a closed-loop system, the mud pit is not required
3. Reduced environmental impact
4. Reduce the consumption of chemicals
   The chemical enhanced centrifugation working process is as below:
   The chemical enhanced centrifugation enables fine particles to be coagulated, flocculated and removed more easily. By adding a coagulant to neutralize the negative charge of the fine particles, the colloidal particles follow the flocculant to bridge the small flocs into larger clumps, which are then removed by a centrifuge.GN can provide customized chemical dosing unit according to different decanter centrifuge model.
   GNLW363C-VFD decanter centrifuge is the most popular model decanter centrifuge for chemical enhanced centrifugation treatment. The bowl diameter is 14 inch the bowl length is 50 inch, the ratio is 3.5, we also have model GNLW364 with bowl length 59.5 inch, with ratio 4.25, the water can be treated more clear with longer straight cone. The max speed is 3900rpm, the typical speed is 3200rpm, the max G force is 3063G, and typical G force is 2062G. With chemical enhanced centrifugation, the separation cut point can reach to 1 microns, the discharged clear water can be reused or send to waste water treatment facility.

Recently one batch of drilling cuttings drying shaker for offshore drilling service company, together with mud tank, centrifugal pump and mud agitators. The technical configuration is as below:

1) Two units of high G drying shaker GNZS594F for drilling cuttings treatment, with cover for mud anti-splash and jet spray system.
2) Two units of mud tank with centrifugal pump and mud agitator
3) The whole system is designed and produced as per offshore drilling requirement, with lifting pad for convenient installation, and compact footprint.
4) All the electric motor and control panel are comply with ATEX explosion proof standard, except for ATEX, we also provide option for IEC EX or CNEX.

This is repeat order from the same client, we have designed several customized mud system for their offshore drilling mud treatment system. The main equipments including shale shaker, mud cleaner, decanter centrifuge, centrifugal pump, all of the equipments are installed on the mud tank with lifting frame. GNZS594F-SHBF shale shaker with 4 panel shaker screens has been widely used for offshore drilling mud treatment, the double deck shale shaker GNZS706F-SHBF with 6pcs shaker screens are the most popular model for offshore drilling rig. Depends on the required treating capacity of drilling fluids, the user can select different model shale shaker.
GNZS706F double deck shale shaker is drived by 2 ea 2.3HP vibration motor ( Italy Oli brand or US Martin brand), the max G force is 7.3G which is adjustable, with 6pcs shaker screens, top layers with 3ea of 750x900mm shaker screen, the bottom layer with 3ea of 700x1250mm shaker screen, the shaker deck adjustment angle is -1°~+5°. The vibration mode is linear motion, we can also produce dual motion shale shaker with both linear motion and progressive elliptical motion if required.
If you need offshore drilling fluids treatment mud tank system, pls contact with GN solids.

Soil pollution mainly comes from oil and gas drilling, production and processing process, such as oily sludge, drilling waste mud, and waste residue from oily sewage treatment. Sometimes the crude oil, liquid type oil waste and other waste will also generate contaminated soil during the storage, transportation and processing.

The oily soil treatment solution main purpose is to separate oil phase ( water and solids content in oil should be less than 3%), water phase and solids phase ( oil content should be less than 2%), to recover oil and water, the oil can be sold, the water can be sent to waste water treatment facility or back to circulation system. The solids disposal is a big problem, the target is to safely dispose the solids at the lowest cost, and recycle the useful oil and water as much as possible. The oil could be sent to thermal unit to reduce the oil content below than 1% as per the regulation of the client’s country .We have standard design of oily soil treatment system for your option, also our technician can study you project and design a customized system for your special requirement within your budget.
The oily soil treatment system consists of crushing screening bucket, feeder, conveyor system, material pre-mixing treatment, cylindrical scrubbing pulping, first stage separation treatment, mud heating and diluted, shale shaker separation, 3 phase oil/water/solids separation centrifuge, chemical dosing unit, etc. The heating premixing module including heating and pre-mixing tank, mud agitator, feeding pump, electric control system, liquid level control system, heating pipeline and manifold guardrail, walkway; The shale shaker separation module including coarse solids separation shale shaker with spray nozzle and cover, feed pump, fine solids separation shale shaker with spray nozzle and cover, heating and pre-mixing tank, mud agitator, screw pump and static mixer, electric control system, etc.

Recently one set of ATEX standard explosion proof decanter centrifuge are shipped to Middle East Customer. The features of the decanter centrifuge are as below:

1. VFD control panel is positive pressurized VFD control panel with HMI smart control, comply with Europe ATEX explosion proof standard with air conditioner for cooling, which can work under ambient temperature up to +55 ℃.
3. The decanter centrifuge bowl is made of duplex stainless steel 2304, the screw is made of stainless steel 316L for heat treatment, the screw is protected by tungsten carbide tiles for longer working life, the open impeller will improve the centrifuga capacity. The bearing is made from SKF brand, the electric motor are ATEX explosion proof standard.
4. The centrifuge bowl diameter is 14 inch, the bowl length is 50inch, max bowl speed is 3900rpm, typical bowl speed is 3200rpm, the max G force is 3063G, and typical G force is 2062G
5. The variable G force and variable frequency design allow the wide application of the decanter centrifuge, GNLW363 recommend speed for barite recovery is 1800~2000rpm, for high gravity solids is 2200 ~2700rpm, for low gravity solids is 2700~3200rpm. The decanter centrifuge can be widely used for drilling fluids solids control, drilling waste management system, oil sludge treatment system, flocculants enhanced centrifuge dewatering unit and industrial waste water treatment.
   Except for solids liquid separation decanter centrifuge, GN solids control also produce 3 phase decanter centrifuge, 3 phase disc centrifuge, 2 phase disc centrifuge, the bowl diameter ranged from 9 inch, 14 inch, 18 inch, 22 inch and 30 inch. For drilling waste management system, we also produce vertical cuttings dryer, screw conveyor and skid mounted system. If you need a ATEX, IEC EX standard decanter centrifuge for onshore or offshore project, pls contact with GN solids control.

What is waste treatment in oil & gas drilling industry? It is the solution for Containment, Transportation, Treatment and Disposal of the drilling wastes. Its purpose is to protect the environment, to reduce the pollution,, to reduce the drilling waste disposal cost, to recover more useful drilling fluids for reuse.
The drilling fluids treatment process is that the mud generated from well head flow to solids control system for treatment, the useful fluids are reused to prepare for new drilling fluids by mixing with proper chemicals, the solids are drilling waste, which is a combination of solids and liquids, take oil based drilling waste as example, according to API solids size classification, the coarse solids size are bigger than 2000μm, the medium solids size range is 74~ 250μm, which can be separated by shaker screens, the fine solids size range is 44~74μm, which can be separated out by desander cone, the ultra fine solids size range is 2 ~44μm, which can be separated by 4 inch desilter cone and high speed decanter centrifuge, the colloidal size is smaller than 2μm, with chemical dosing unit, the dewatering centrifuge can separate it out. To improve the drilling waste treatment efficiency, the best solution is waste minimization.
The drilling waste treatment solution including cuttings handling system and cuttings treatment system. The cuttings handling system mainly consists of augers, waste collection hopper, vacuum pump, etc, the screw conveyor collect the drilling waste from solids control primary shaker and transfer to vertical cuttings dryer or high G drying shaker. The cuttings treatment system consists of vertical cuttings dryer, high G drying shaker, dewatering centrifuge, feeding pump, tank skid, skip, etc.
If you need drilling waste management solution for both onshore and offshore drilling rig, pls contact with GN solids control.