drilling waste

Containerized drilling waste management system normally will be used in Russia for lower temperature and winterized conditions . GN Solids Control delivery the third sets of containerized drilling waste management to the same client last week and get a good feed back of drilling waste management equipment performance in Russia . The main equipment will including vertical cuttings dryer , decanter centrifuge , screw conveyor , screw pump , 40 feet container and work skid .

40 feet container supplied to keep vertical cuttings dryer and other drilling waste management equipment inside for winterization design . We made some changes on the container like doors or windle depending on working requirement . The whole container size on a big work platform to hold all above and make a base for the cover and temperature issues .

One set vertical cuttings dryer with 930mm size diameter tank and 900 RPM rotating speed to allow drilling cuttings treating flow reaches to 30 to 50 cubic meters per hour . the dry solids treated by vertical cuttings dryer will reduce fluids and fluids content will be bellow 5 percent totally . One set screw pump will be installed to flush vertical cuttings dryer incase fluids content a lot of fine solids and make it hard to flow . The air knife will make client need a air compressior and this design is for avoid screen block by water base drilling cuttings .

One set of decanter centrifuge will be installed to recycling drilling mud that recycled by vertical cuttings dryer . It is high speed centrifuge with 3200 RPM rotating speed for separation 2 to 5 microns solids out and 30 cubic meters per hour drilling mud flow max . The tungsten carbide tiles is bolted on screw impeller to help screw working longer life .

Drilling waste management equipment is designed to dry oilfield drilling cuttings that discharge from shale shaker on solids control system . The drilling cuttings that discharge from shale shaker normally contains some percentage of fluids but we don’t want the fluids content , and wanna to separate the fluids contain out to get dry solids . The vertical cuttings dryer is designed by centrifugal force to separate fluids contain out within 5 percent , so that the dry solids can be delivery away for further process .

Other then vertical cuttings dryer , there will need oil field decanter centrifuge to recycling the fluids content that separated from oil field drilling cuttings . The fluids contain will contains a lot of fine solids cause screen of vertical dryer minimum 0.25mm size hole , one set of high speed decanter centrifuge will be layed after vertical cuttings dryer for 2 – 5 microns separation , the dry solids out of decanter centrifuge will be delivery away for further treatment together with dry drilling cuttings out of vertical cuttings dryer and fluids contain will be transferred into solids control system for re-use .

There can be different of pump for feeding decanter centrifuge , screw pump is the best way to protect solids content to keep more the majority solids can be separated out . The screw pump normally will be lay separately or on the vertical cuttings dryer working frame . It will takes some space on the frame . Screw auger will be used also on feeding of vertical cuttings dryer or transfer other solids content or drilling cuttings to save man power . GN Solids Control build a full line of drilling waste management system , there are more information on GN website or you can ring GN office for more information .

A total drilling rig system usually contains drilling floor block, mud solids control block and recovery, mud pump and power block. Concerning these, the mud solids control and recovery block is composed of drilling mud recycling and drilling waste cuttings system. This block can be used to maximally recover the valuable drilling mud as well as decrease the waste discharge. 

The drilling waste cuttings management system occasionally called the further treatment method for solids control. Since the cuttings was delivered from out interface of the primary solids control equipment like shale shaker and mud cleaner towards the cuttings dryer device. The principal equipment for drilling waste cuttings recovery consists of cuttings transferred equipment, Verti G cuttings dryer, feeding pump and decanter centrifuge.

The cuttings transferred devices is being regarded as a bridge connecting the primary solids control system to the waste management unit. The typical and well-liked approach to transfer the cuttings is to utilize the screw conveyor and hose pump.

What is the Difference of the screw conveyor and hose pump

The screw conveyor itself has a gathering groove and the screw propeller push the cuttings to the Verti G cuttings dryer. Since the screw conveyor is engineered to shift the cuttings around an upright line. Usually, on the spot, there are not just 1 unit screw conveyor, several unit screw conveyors are situated crossing with certain angles so as to the waste cuttings can be delivered to the cuttings dryer. While the cuttings dryer feeding port is high, the screw conveyor is sloping. Subsequently if the waste cuttings are high liquid content, the liquid might be regurgitate and overflow off the conveyor.

The hose pump is a new, multifunction and multipurpose industrial pump. There is a particularly made rubber hose with smooth inside and high strength installed in the pump body. The hose pump has a exclusive structure with no sealing aspect, no leakage and no pollution. It has a high suction capability, self-cleaning capability, sucking material in two instructions. The hose installed in quite simple and operation is effortless, and the maintenance charge is low. The most essential is no block when pumping fluid with high viscosity and foreign substance content.

The drilling waste cuttings transferring equipment is important throughout the operation. GN Solids Control has applied both of the screw conveyor and hose pump in the design of the drilling waste management system, for more information and facts, please get in touch with GN freely.

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Vertical Cuttings Dryers are generally used to reduce the amount cuttings discharge from water based mud (WBM), oil based mud (OBM) or synthetic based mud (SBM). Right now, as people pay much more attention to environment protection, the cuttings dryer are used more frequently. 
There’s another important reason, according to research, 1 to 4 barrels of clean drilling liquids can be also be recycled when 1 barrel of drill cuttings are separated by solids control equipment, which means using vertical cuttings dryer is very cost-effective in the long run.
Depend on different situation, we can choose a screw conveyor or a vacuum device to transport the drilling fluids to the vertical cuttings dryer. In the daily use, it’s quite common that a vertical cuttings dryer is equipped with a screw conveyor.
GN Vertical Cuttings Dryer uses centrifugal force to dry drilled solids from oil or synthetic base fluids. The drying efficiency can be reached to less than 5%

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A: 1-shale shaker; 2-mud cleaner; 3-auger conveyor; 4-vertical cuttings dryer; 5-waste discharge;6- recovery of mud; 7- Collection Tank; 8-centrifuge feeding pump or screw pump; 9-centrifuge 10-solid discharge port; 11- Clean mud recovery mud system.
From the above picture, we can see clear about the workflow: Drilling mud from rig enter into shale shaker(1),mud cleaner(2).After treating by these two steps, the drilling cuttings enter into vertical cuttings dryer by auger conveyor(3). Solids enter the Vertical Cuttings Dryer (4) through the top feed inlet and are separated inside the Dryer. The clean solids exit the bottom of the Dryer and are discarded overboard (5) or collected in Cuttings Boxes for offsite transport and disposal. The recovered liquid is routed to a Liquid Collection Tank (7). The recovered liquid is conveyed by screw pump (8) and then processed through a decanting centrifuge (10) for final clarification, storage, and reuse (11).

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The drilling fluids from vertical cuttings dryer contain a percentage of low gravity fine solids. Before the mud is discharged to the active system, it should be treated by a high speed centrifuge. However, this may not be necessary in all conditions.