Author: gnadmin

Recently GN solids control shipped one batch of high speed decanter centrifuge for Russia Company for drilling fluids treatment. This is a repeat order for the same client for same application. As one of the most professional decanter centrifuge manufacturer in China, GN can design and produce different size/ type decanter centrifuge not only for oil & gas drilling industry, but also for industrial waste water treatment, food, refinery oil sludge treatment industry. If only the user filled in the specific question list, we will provide a customized solution for your decanter centrifuge requirement.

The high speed decanter centrifuge model number is GNLW363CG, which is the best sold model among all the centrifuge models. The bowl size is 360mm, 14 inch bowl, the bowl length is 1270mm, 50inch. The max speed is 3900 rpm, the normal rotation speed is 3200 rpm, the max G force is 3063G, the typical G force is 2062G. The cuttings separation cut point is 2~5 microns, differential speed 40 rpm, the gearbox torque is 3500N.M, gearbox ratio is 57:1, the max capacity is 200gpm, the typical capacity for drilling fluids is 132gpm. The total power consumption is main motor 37KW, back drive motor 11KW, the pump motor is 7.5KW, we can provide different option of explosion proof motor and control panel as per client’s requirement.

The high speed decanter centrifuge can be installed on the mud tank with 4 legs or can be lay on the telescopic skid for better separation result, we can provide customized design for centrifuge mud tank and telescopic skid. The solids discharge trough can be customized or to be made locally to meet jobsite’s requirement.
For more information about GN high speed decanter centrifuge and the operation instructions, pls contact with GN solids control, we have several units of centrifuge in stock for fast delivery.

As one of the most professional shale shaker manufacturer in China, GN solids control can produce not only linear motion shale shaker, but also dual motion shale shaker, recently one batch of dual motion shale shaker are shipped for international drilling company.
The dual motion shale shaker can work under both linear motion and Progressive elliptical motion according to different drilling depth and drilling fluids requirement. The vibration motor can be adjusted on the starter.

The features for linear motion shale shaker:
Higher G force, higher screen conductance, higher treating capacity, direct action on the drilling cuttings, bigger throw vibration angle, the cuttings stay time on the shaker screen is shorter, it is suitable for the drilling fluids with low viscosity, high fluids flow, high solids content, coarse and hard drilling cuttings, especially it is widely used for first spud, second spud of the oil drilling rig.
The features of Progressive elliptical motion shale shaker:

Slow action on drill cuttings, the cuttings stay time on the shaker screen is longer, the screen opening is not easy blocked, the drilling cuttings not easily crushed. It is suitable for the drilling fluids with high viscosity, low flow rate, high solids content, and easily crushed drilling cuttings. Especially it is widely used for third spud, fourth spud of the oil drilling rig.
Whichever the vibration motion is used, the operator can choose it according to different drilling fluids. The shale shaker with 4 panel shaker screen of composite material frame, as one of the most shaker screens manufacturer in China, most of GN produced shaker screen is with composite material frame, we can produce screen mesh size from API 20 to API 300 as per your requirement, and we have stock for the best sold model replacement shaker screens, for urgent requirement, the delivery can be much faster.

Recently we shipped one set of dewatering centrifuge with chemical dosing system to Singapore for TBM project. They bought one set of TBM desander unit model number GNMS-1000D before, which is our economic configuration mud cleaning unit for TBM slurry.
The technical specs are as below: Double deck shale shaker with 2 ea of 10 inch desander unit installed on a compact size mud tank with stairs, centrifugal pump feed the slurry to desander cone.
The working process is as below: the submersible slurry pump transfer the slurry to bottom shale shaker to separate coarse solids from the slurry, the fluids dropped into the mud tank, the centrifugal pump feed the clean fluids to desander cone, the clean fluids discharged from outlet pipe and flow to storage tank for reuse or further treatment. The separation cut point is 45 microns. The discharged solids dropped down to top layer shaker screen to recycle more useful fluids.
The dewatering decanter centrifuge model number is GNLW553-VFD,the bowl diameter is 550mm, the bowl length is 1800mm, the max capacity is 500gpm, and typical capacity is 400gpm, when adding flocculants, the treating capacity will be smaller based on different materials. The main motor is 90KW, the back drive motor is 37KW, the differential speed is 0 ~ 45 rpm, gearbox torque is 12000 N.m., the typical speed is 0 ~2500 rpm, the typical G force is 0 ~1888G.
Since the slurry desander unit separation cut point is 45 microns, it can not be reused directly, the dewatering centrifuge with flocculants can separate fine solids from the slurry up to 1 microns, the recovery water is clean and can be reused for TBM project to save cost for the client. The discharged solids with less moisture can be collected by bag and ship out by truck conveniently.

One unit of oil sludge treatment system for China client is shipped out recently, the design treating capacity is 15m3/h. A complete 15m3/h oil sludge treatment system made by GN solids control including vacuum pump unit, pre-mixing tank modular, shale shaker modular, chemical dosing unit, decanter centrifuge and 3 phase separation centrifuge modular. According to different material, we can provide customized design to add or remove the modular. The compact design in modular is for convenient operation and transportation.

1. Vacuum pump is widely used to transfer waste oil, oil tank bottom cleaning sludge, drilling cuttings, drilling fluids, soils, sand, it is 100% air operated pump without electricity power.
2. The vacuum pump transfer the oil sludge to pre-mixing tank modular, which with heating pipeline inside the mud tank to heat the oil sludge up to 60 degree. With chemical jetting and heating process, the emulsified oil can be easily treated and remove from the solids.
   For free oil sludge, it can be treated by shale shaker modular directly.
3. The shale shaker modular with sealing cover and internal spray system is to separate the coarse solids from the oil sludge and reduce the solids content, it will protect the decanter centrifuge in the next step and extend the working life of the centrifuge screw propeller. If the solids content is too high, the screw propeller will be easily damaged; and the big solids will be easily block the centrifuge bowl.
4. The decanter centrifuge can separate the fine solids from the oil sludge to reduce the solids content below 5%, by using proper demulsifier and chemicals, the separation cut point is up to 1 microns. The fluids treated by decanter centrifuge flow to the buffer tank then flow to the disc centrifuge, the disc centrifuge can separate oil, water and solids .

As a professional manufacturer of mud recycling system for HDD & CBM & TBM, our mud recycling system have been widely used for international big projects. Here are some typical projects case study:
Case study 1:
Project period: Year 2014 ~ 2019

Customer status: CHINA PETROLEUM PIPELINE BUREAU China-Russia gas pipeline Trenchless Project. CPP is the largest petroleum pipeline engineering company in China and the largest contractor for the China-Russia gas pipeline project. Over 20 units of GN mud recycling system are working for CPP projects. And 5 of these HDD mud recycling system are used in the China-Russia gas pipeline project.
Project status: The 3,000-kilometre (1,850-mile) pipeline, which was the world’s largest construction project ,will supply China with 38 billion cubic meters (1.3 trillion cubic feet) of gas annually when fully operational in 2025. Russian leader Vladimir Putin and Chinese counterpart Xi Jinping hailed the “Power of Siberia” pipeline as a symbol of cooperation.
Case Study 2:
Project period: Year 2016 ~ 2018
Customer status: Hong Kong Airport

Project status: HDD Trenchless mud cleaning and recycling for 5.2 KM Aviation fuel Pipeline installation. The mud recycling system specification including:
2 sets of 1500gpm mud recycling system, including 6 sets of GNZS703 Shale Shaker, 2 GNZJ703E-3S16N mud cleaner, 2 mud tanks, and centrifugal pumps and screw conveyor.
The working process of the mud cleaning system is : the submersible slurry pump feed the slurry to shale shaker, the coarse solids are separated out from shale shaker screens, the clean fluids dropped into shaker tank, the centrifugal pump feed the clean fluids to mud cleaner desander cone to separate solids bigger than 45 microns, the clean fluids dropped into desander compartment, the centrifugal pump 2 feed the clean fluids to desilter cone to separate solids bigger than 20 microns, the clean fluids are storage into the desilter tank.