Dewatering System for Water Based Drilling Fluids

GN new designed dewatering unit for our client is customized design according to client’s particular project. We ever sold decanter centrifuges to a lot of clients for their dewatering system, but we did not provide the complete system design.

The whole system is devided into 3 parts: Part one solids control or called solids removal, part two dewatering unit, part three storage systems.

Part 1: Solids removal:

Double deck shale shaker GNZS706E-HB and mud cleaner GNZJ703E-3S

This part is to separate the big solids from the drilling fluids and less the solids content, so the fine solids will remain in the drilling fluids and be pumped to the dewatering unit.

Part 2: dewatering unit

This part is to add chemical powder into the drilling fluids for flocculation, then use the cutting machine to cut the big solids into small pieces, then use the screw pump to transfer to GN big bowl decanter centrifuge GNLW553VFD to separate the solids from water. Because water conservation has been a public concerned issue in the world, this dewatering unit has the functions below:

1)       Keep the drilling fluids balance by weight for better performance during drilling

2)       Less tank bottom for easy cleaning

3)       Less the cost for treating the water based drilling fluids

4)       Get more clean water for reuse or conservation

Part 3: storage of clean drilling fluids

These drilling fluids can be reused for drilling by mixing some chemicals.

Advantage of GN designed dewatering Unit:

1 Easy transportation: The equipments are fixed into a 20ft container size frame, so you can put it on the standard truck.

2 Suitable for both cold weather and hot weather: All the units are equipped into the 40ft container, which is rain proof, there is conditioner or fan inside the container to keep it cool. If you operate it in cold weather like Russia, you can close the door of the container.

For more info for this dewatering system, pls contact GN sales(http://www.gnsolidsamerica.com).

Related Article:

Dosing System for GN Mud System: http://drillingmudcleaner.com/vertical-cuttings-dryer-feeding-system/

Centrifugal pump Mechanical seal

There mainly 3 sealing types for centrifugal pumps, like shear pump, sand pump, slurry pump, etc…

1) Asbestos packing

2) Arid seal

3) Mechanical seal

Mechanical seal is the best and most costive sealing type. It is reliable and with a longer lifetime.

The basic definition of Centrifugal pump Mechanical seal

Mechanical seal is the seal device for rotary machines. Like centrifugal pumps, centrifuges, reactor and a compressor equipment that can be used in mud mixing system. Because the transmission shaft passes through in the inside and outside of the equipment, so, the existence of a circumferential clearance between the shaft and the equipment, equipment of medium leakage outwards through the gap, if the equipment inside the pressure is lower than the atmospheric pressure, air to the equipment inside leakage, and therefore it must have a package to prevent leakage of the shaft. Many seal species, due to mechanical seal has the advantages of small amount of leakage and long service life and so on, so in today's world,  mechanical seal is sealed in the main shaft of the equipment. Mechanical seal is also called the face seal, in the relevant standards of the state is defined as: "by at least a pair of end faces perpendicular to the axis of rotation in the fluid pressure and the elasticity of compensation organizations (or magnetic) device function and coordination of auxiliary seals to keep integrating closely relative sliding form to prevent fluid leakage.

Summary of principles on Decanter Centrifuge Mechanical seal

Mechanical seal is by a pair of or number on the vertical axis for end face relative sliding in the fluid pressure and the compensation mechanism of elastic (or magnetic) under the action of combined with keep sticking auxiliary sealing and leakage resistance to seal device.

Common mechanical seal structure comprises a stationary ring (static ring) 1, rotating ring (dynamic ring) 2, 3 elastic components, a spring seat 4, fastening screw 5, a rotating ring auxiliary seal ring 6, and the static ring auxiliary seal ring 8 and other components, anti rotation pin 7 is fixed on the cover 9 to prevent static the rotation of the ring.

Rotating ring and the stationary ring is often also can according to whether they have the axial compensation capacity and is called the compensation loop or non compensation ring.

More information please visit: http://www.gnsolidsamerica.com