Shale shaker purpose

The shale shakers are mainly powered by the rotation motors to rotate and produce the periodic changed passivity force, drilling fluid that contain solid phase pass through the mesh screen, do the forcing movement on the mesh surface, and then the solid phase debris with various size will be filtered. The separation sizes and through put of the shale shakers is the most important factors of making use decision. The technology level of shale shakers mainly show at the treating capacity, the stability of filter debris, the life of operation and the flexibility of operation. The managing ability of shale shakers is related with the structure of shale shaker steel body, the movement arrangement, the vibration frequency, the vibration intensity, the working area of shale shakers and the degree of thickness. In order to make the shale shakers match with the drilling machineries, the maximum outputs of the drilling pumps and the quantity of drilling cuttings filtered must be considered.

Shale shaker is one of the main products of GN solids control .GN  sell a series of solids control equipment and drilling waste management equipment including vertical cuttings dryer , shale shaker , screw conveyor , shear pump , oilfield shale shaker , mud cleaner , desander and desilter , vacuum degasser , poor boy degasser , decanter centrifuge , mud tank , mud agitator , etc .

The classification of shale shaker

It depends on the movement arrangement; the shale shakers can be grouped into round screen shaker, the common elliptic screen shaker, linear screen shaker, equilibrium elliptic screen shaker. The common elliptic screen shaker: also can be called the disequilibrium elliptic screen shaker, there is a exciter devices fixed right above of the screen box , the screen boxes may tilt an angle, use the leverage of the gravity, avoids the sand having the tendency of back flowing. From this, the tilt of the screen boxes really improved the flowing performance of sand, but the disposed amount of the drilling fluid reduced, this is the main disadvantage of the common elliptic screen shaker. The linear shale shakers: Two main axises with eccentric blocks do synchronous reverse rotation to produce the liner vibration. Because the direction of the liner shale shaker is unchanged, which makes the debris difficult to fall through, and then the screen paste aspect appears, which makes the valid over flowing area of screen and throughput reduced. When the number of screens increases, the aspect of screen paste will be more serious. So when the linear shale shakers use the super fines screen, it could not meet the requirements of the using amount of drilling fluid.

GN Series Pumps Used for Solids Control and Waste Management

Besides the main equipments used for solids control and waste management systems and HDD, CBM, Piling drilling projects, like the shale shaker, desander, desilter, mud cleaner, decanter centrifuge and vertical cuttings dryer, GN also produce suitable and reliable auxiliary equipments including mud agitator, mud gun, jet mud mixer and various of pumps.

Below are some popular pumps and their applications for your information:

1. centrifugal pump GNSB Series, which is also called sand pump. It uses centrifugal force to suck the material and feed to the main equipments. In a complete system, it is widely used like the desander cones feeding pump, desilter cones feeding pump and also the mixing pump for the jet mud mixer. In trip tank for a large solids control system, centrifugal pump is also used.

In a mud recycling system for the HDD, CBM, TBM or Piling, in most cases, centrifugal pumps are used as desander or desilter cones feeding pump also, and also mixing pump for the jet mud mixers. Sometimes, per client special request, it could be replaced by a horizontal slurry pump when serving as desander or desilter feeing pump.

2. shearing pump, plays similar role as centrifugal pump, but in some special chemical transportations, it is feeding pump for jet mud mixer also and because of the different design, it could also cut the chemicals during transportation.

3. submersible slurry pump, it serves mainly 2 applications in GN series solids control system and waste management systems, the first one is centrifuge feeding pump for GNLW363 decanter centrifuges, GNLW452 decanter centrifuges and etc. The second one is the feeding pump for a mud recycling system for HDD, CBM, TBM and piling works. Unless the oil and gas drilling rig jobsite, where the drilling mud could flow directly to the shale shaker, in such mentioned projects, the mud for treating mostly comes from the mud pit. A submersible slurry pump can help to suck mud from the mud pit to the system.

4. screw pump or called mono pump. GN is not manufacturing this screw pump, but in order to match suitable screw pump for the centrifuges, GN cooperate with the German brand Netsch. Screw pumps are most suitable solution for feeding the decanter centrifuges.

May you need any of them, welcome to contact us freely.

Why The Drilling Waste Should Be Treated or Handled

Where is a well being drilled, where is the waste generated. The wastes generated by drilling vary from the drilling fluids used for drilling and the drilling site, but generally include drilling cuttings, waste water, spent drilling fluids, completion fluids and filtration wastes. Absolutely the wastes are contaminants to the surrounding ground and water if directly buried in the mud pit. With increasing public awareness of the damage caused by the wastes, the stricter environmental standards and regulations on drilling activities, the significance of the handling and treatment of has attracted the eyes of drilling contractors and increased in different degrees around the world.

The handling and treatment process depends largely on the local regulation of a country, while in a country where there is no environmental regulation on the drilling activities, the drilling contractor will fall back on minimum standards used in other countries or standards set at a corporate level. Generally, 4Rs can be used to describe the process of handling and treatment of the drilling wastes: Reduce&Reuse&Recycle&Recover. Reduce means reducing the wastes by some methods such as precise plan, smaller bole and selection of drilling fluids. It would be perfect if no waste generated when a well is drilled. Reuse means cleaning the waste to collect active drilling fluids by solids control equipment normally including shale shaker as 1^st phase, desander& desilter or mud cleaner as 2^nd and 3^rd phases, and decanter centrifuge as the final phase. Recycle means to further treat the drilling cuttings after Recycle after the recovery of  the drilling fluid for reuse. Recover means to make the drilling cuttings into a hydrocarbon by high temperature treatment. Though the recovered hydrocarbon can not be used as drilling fluids, it can be used for a fuel material.