GN Nodig Mud Recycling System

Last week, one of GN customers asked one New Brand . He wanted to used this decanter centrifuge for mud treatment of water well drilling. GN solids control is an expert in mud system for water well drilling, and has manufactured many a mud systems for water well drilling. This April, GN delivered one set to Australia, another one to Kuwait. Besides mud system for water well drilling, GN is also specialized in solids control system for oil and gas drilling, mud system for HDD rigs and Tunneling. Last Wednesday, GN delivered one set of mud system for TBM with dewatering unit. As to drilling waste management system, GN really has a lot to say. This month, GN sold four units of drilling waste management system to Baker Hughes in Russia.

A water well is an excavation or structure created in the ground by digging, boring, or drilling to access groundwater in underground aquifers. Whether drilling fluids are needed or not depends on the formation of ground the depth of drilling. In many areas with desert in Africa and Middle East, drilling fluids are always needed, and a mud recycling system and mixing system is also needed to preparing drilling mud.

GN Solids Control designs easy-move mud systems for water well drilling, and contractors have two options: one is trailer mounted mud system; the other is skid mounted mud system. Besides, hydraulic jack up system is also available. Generally, the mus system is composed of  shale shaker and desander(or desilter or mud cleaner) for solids separation, centrifugal pumps for feeding mud, mixing device for mud mixture, and mud tanks. GN has introduced the general information to our customer, and now he is considering the whole treating capacity of this mud system

By accelerating mud through a curved vessel, solids and mud are separated according to Stokes Law. These solids are passed over a screen to recover excess fluid. Function The mud cleaner is a solids separation device that combines a desilter with a screen device. The mud cleaner removes solids using a two stage process. First, the drilling fluid is processed by the desilter. Second, the discharge from the desilter is processed by a high-energy, fine mesh shaker screen. This method of solids removal is recommended for muds containing significant amounts of weighting materials or having expensive fluid phases.

Note: When recovering weight material with a mud cleaning system, be aware that any fine solids that go through the cleaner’s screen are also retained in the mud. Over time, the process can lead to a fine-solids build-up.

Trouble shooting for mud cleaners

Since the mud cleaner is both a hydrocyclone and a shaker, many of the operating guidelines listed for these devices apply to mud cleaners. A decrease in solids coming off the screen may indicate a torn screen, which should be replaced immediately. Plugged cones or large solids coming off the screen can imply a problem with the upstream shale shakers. The likely causes are bypassed screens, torn screens or dumping the shaker box into the active system. The desander cones on the mud cleaner should be 6 in. diameter or smaller. The median cuts of larger cones are too coarse to be useful.

Performance operation of mud cleaner

If a mud cleaner were to be utilised, a number of areas should be addressed:

• The unit should be installed in such a way that access, both for monitoring and maintenance purposes is adequate.

• It is extremely important that the centrifugal feed pump is correctly matched to whatever mud system is in use, so as to guarantee the correct feed pressure.

• Impeller size and condition is critical to operational efficiency. Any found to have seriously washed blades should be replaced at the earliest opportunity.

GN Solids Control is an expert in mud system for tunneling. Just a week ago, GN delivered a set of mud system with dewatering unit to a Singapore customer. Besides, mud system for tunneling, GN also provides mud system for HDD, solids control system for oil and gas drilling.

Dewatering unit is equipped to separate extremely fine particle in the drilling mud to lower the proportion, thus ensuring the high performance of drilling fluids.

 Sometimes, we do not need dewatering unit for the processed mud with particles over 5 microns being removed out is satisfying, but if not, we need this unit to separate finer solids out to meet the requirement for drilling, that’s why we need it in this system. This dewatering unit is a suitable solution.

 GN Dewatering Unit Configuration as below:

1. Coarse Solids Separation System
GN’s dewatering unit is specially for drilling project, thus before the dewatering unit, there is a 2-stage drilling mud recycling system including 1 unit GNZS705-HB shale shaker with double layers screen. And 1 unit GNZJ703E-3S desander unit. With the two equipment, large size solids are removed out.

2. Two Tank Compartments PAM Mixing Unit 
GN’s PAM mixing unit has adopts 2 tanks design with a pre-mixing tank on top. The flocculate dry powder is added from the hopper on tank top and then delivered to pre-mixing tank. As per the response from the level gauge located in either mixing tank, the pre-mixed chemicals would flow into the mixing tank for full mixing and storage. All process here for chemicals mixing is automatically controlled.

3. Dewatering Decanter Centrifuge. 
Used as dewatering centrifuge, GNLW553G separates flocculated colloidal particles. There are two screw pumps, one feeds flocculants to the centrifuge, one feeds active mud to centrifuge. The two feeding process are done at the same time, so the unltra fine solids will be flocclulated larger and then separated out.

Composed of the three main parts, GN made mud system will enjoys a high performance.

Through a few years evolving, GN has achieved many a the first. GN is the first API certified manufacture of solids control equipment in China; GN is the first manufacture in China who is able to design and manufacture vertical cutting dryer and high G dryer shaker. As an expert in solids control and drilling waste management, GN is striving for more firsts.

Recently, a unit of cutting dryer system for drilling waste is completed in GN. It is specially designed for a Cyprus client. This cutting waste cutting dryer system is composed by the following equipment.

1. One set of vertical cutting dryer with PLC control panel available. The cutting dryer’s speed varies from 0 to 900 rpm.

2. One set of screw pump, which is used to flushing screens inside the vertical cutting dryer to avoid blocking.

3. One set of submersible slurry pump, which pumps the mud to the decanter centrifuge to remove the ultra fine solids out.

4. One set of decanter centrifuge with the typical treating capacity of 132 GPM. The speed of this decanter centrifuge can be adjusted from 0 to 3200 rpm.

5. Removable mud tank for vertical cutting dryer, decanter centrifuge and mud collecting tank.

As to the working process of this cutting dryer system for drilling waste, it mainly includes the below three.

1.Waste cuttings discharged from shale shaker and mud cleaner will directly be transferred to the vertical cutting dryer through screw conveyor.

2.While being processed by the vertical cutting dryer, solids will be discharged from the bottom gate of this cutting dryer and the liquids will flow to the collecting tank.

3.The submersible slurry pump will transfer the mud to decanter centrifuge for further process and particles over 2 microns will be separated out.

GN’s vertical cuttings dryer is suitable for both the OBM and WBM, please click below link http://www.gnsolidscontrol.com/video/vertical-cuttings-dryer-water-based-mud-drilling-waste for video on the vertical cuttings dryer performance.

GN set an branch in Americal last year with a 3000 squire meters ware house to stock shale shaker, mud cleaner, decanter centrifuge and pumps. We will have stock for standard equipments in houston normally like bellow:

1) 500GPM capacity shale shaker with 3 or 4 decks. IECEX certified vibrator motor and control panels is availeble, 7.0G force, 2×1.72KW vibrator motor

2) 1000GPM capacity mud cleaner with 2 no. 10 inch desander cone and 12 no. 4 inch desilter cone. Bottom shaker normally 3 or 4 decks panel same with above shale shaker specification

3) Centrifugal pumps for feeding  mud to desander desilter cones, normally 1000GPM mud flow capacity with 30-35m lift IECEX certificated electrical motors

4) Mud agitators from 5.5-22kw powered with impeller and shaft for stock

5) Mixing pump and mixing hopper for mixing new mud purpose, normally 1000GPM mud flow with IECEX certified electircal motors

6) Decanter centrifuge for oil and gas drilling with middle speed or high speed rotation. Max 3200 RPM for bowl speed and 2-7 microns separating size, duplex stainless material for bolw and screw

7) Big bowl centrifuge for oil and gas drillilng, 400-500GPM mud capacity, 2500RPM max speed, deplex stainless material for bowl and screw

8) Screw pump for feeding GN decanter centrifuge for drilling waste management project

9) Stardard spare parts for shale shaker, mud cleaner, decanter centrifuge, pumps and pipe connections

GN Solids Control is one of the proffessional solids control equipment and drilling waste management equipment manufacturer, please contact GN freely for inquiry or help.