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Category Archives: Hydrocyclone desander

Use features of mud desilter compare with desander

Desilters are similar to desanders with the only difference in the size of sand particles that are removed by two devices. Desilters remove sizes which are 20 microns or lesser whereas desanders removes the sizes from 50 to 70 microns.

Desilters are what smaller diameter hydrocyclones are typically referred to as, and will generally be used directly after a desander. Occasionally desanders will not be necessary and the desilter will operate immediately after the scalping pass. While desilting cones can achieve a finer cut, down to 20 micron, than desander cones they cannot process at as high of a rate per cone and are headered together in order to meet the desired throughput.

desilter

Advantages of Mud desilter

 

1. 100% Polyurethane(PU) material to make desilter cones to extend its service life
2. Clamp type for easy maintenance
3. Compact design small in footprint
4. Flexible options for 8 or 10,12,16 for different capacities
5. Flexible fast connection is available for user to assemble

desilters

The Underflow will be recirculated over a shaker and processed again while the overflow will be free to move on to the next stage, whether it’s a centrifuge, chemical treatment, or a finished product.

Old-fashioned desander and desilter delivery from DC Solid control

Desander and desilter is widely used in mud cleaning system. Following the progress of the time and high requirements of users. The desander and desilter all make greats progress. But recent days, DC Solid control company got an order of 6 sets old-fashioned desander and desilter used for HDD industry.

Desander is installed on top of the mud tank following shale shaker and vacuum degasser, but before the desilter. Desilter is installed on top of the mud tank following Desander. They also can be installed completely: in this case, they are installed on one deck shaker and called mud cleaner or mud conditioner.

desander desilter

Desander removes the abrasive solids from drilling mud which cannot be removed by shale shakers. Normally the solids diameter for desander to be separated would be 45~74μm, and 15~44μm for desilter.

Both Desilters and Desanders are available in a large range of configurations including stand alone, over a shaker as a mud cleaner or packaged with a supply pump as a mobile desilting unit. Please contact DC Solid control office to discuss applications and appropriate technical specifications.

 

Another two desilters shipped to Singapor

At the begining of July, DC Solid control shipped two desilters to Singapore which is our third time shipped here. The two desilters used for pilling fileds and matched 12 ea 4″ hydrocyclones.

The Desilter is produced by DC company is very good, because the ability of separation is high and the ranges of the separation particles size is big. DC is a company focuses on the production, sales and after-sales maintenance service of solid control equipment of petroleum drilling (not excavation).

DESILTERS

Advantages of desilters produced by DC solid control  

1. Noise is small, the throughput is big, the using life of the screen is long.
2. The distribution of the symmetrical institutions is reasonable and the working is stable.
3. Every imports and exports of the hydrocyclone bottom month have ball valves, we can adjust the workload of the Deserter at any time, it is easy to operate
and maintain.
4. The ability of the separation is strong, the range of the separation particle size is big, it can remove the solid phase particles which the diameter is greater or equal than 15um.

DC Solid control is concentrated on matching the requirements of our customers. Our management principle is to supply a high quality, rapid, honest, considerate service to our customers. Our aim is to supply the most advanced equipment and technology to our customers.

Mud desanders for sale

Drilling fluid desander is the second stage of solid control equipment of solid control system. Desander is a efficiency unit which can eliminate solid particles whose diameter is 45-75um.

desander

Desander is mainly constitute of a soft hookstrip bottom shaker, hydrocyclone units, vibration motor and inlet and outlet pipe. The most important part of the desander is the hydrocyclone, different quantity and size define the flow of the desander. Now let me introduce you the features of our high quality hydrocyclone.

1. Polyurethane(PU) Material or high-chromium cast iron for drilling fluid desander cones with longer using life.

2. Clamp type for easy maintenance.

3. Compact design with small footprint.

4. Flexible options for 1, 2 or 3 for different capacities.

5. Flexible fast connection is available for user assembly.

DC Solid control is a professional manufacture of desander for many years, we can manufacture it according to users different requirements to accord with the use of construction site

Drilling fluid desander and desilter

Desander and desilter are the second and third class separation equipment in the solid control system. Desanders and desilters are solid control equipment with a set of hydrocyclones that separate sand and silt from the drilling fluids in drilling rigs.

desander

Desanders are installed on top of the mud tank following the shale shaker and the degasser, but before the desilter. Desander removes the abrasive solids from the drilling fluids which cannot be removed by shakers. Normally the solids diameter for desander to be separated would be 45~74μm, and 15~44μm for desilter.

desilter

Desilting and Desanding hydrocyclones are made from high density abrasion resistant polyurethane. The unique internal manifold design minimises the back pressure on the hydrocyclones maximising the solids removal. Fine tuning is achieved through adjustable orifice openings at the discharge point on the cone.

Features & Benefits of Drilling Desilter and desander

1. Clamp type for easy maintenance.
2. Compact design with small footprint.
3. 100% Polyurethane(PU) material for oilfield drilling fluids desilter cones with longer using life.
4. Flexible fast connection is available for user assembly.
5. Flexible options for 2, 4, 6, 8 or 10, 12, 16 for different capacities.

Both Desilters and Desanders are available in a large range of configurations including stand alone, over a shaker as a mud cleaner or packaged with a supply pump as a mobile desilting unit. Please contact DC Solid control office to discuss applications and appropriate technical specifications.

Introduction of hydrocyclone capacity

Since most hydrocyclones are designed to operate at a constant 75 feet of head at the input manifold, and flow rate through any cone is constant at constant inlet pressure, flow rate through any cone is predicatable.

Hydrocyclones are rated from 40 to 80 gpm of liquid removal. The normal 4-inch cones will remove 4gpm of solids, or 5.7 barrels per hour of solids, per cone. Therefore, the standard 16 cone arrangement will accommodate removal of 510 cubic feet of solids per hour. For 17.5 inch hole, this equates to penetration rates averaging 297 feet per hour. Clearly, if design and operational characteristics are adequately maintained, more than ample solids separation can be effected.

hydrocyclone

The accelerated gravitational forces generated in hydrocyclone are increasely proportion to the radius of the cyclone cylinder. Thus, the larger the diameter, the hydrocyclone, the coarser its cut point and greater its throughput. The smaller its cut point and greater its throughput.

mud cleaner

The smaller the cone, the smaller size particles the cone will separate. In other words, the median particle size removed decreases with cone diameter. Median particles size also increase with increasing fluid viscosity and density, but decreases as particles specific gravity increases. Oil-field hydrocyclones range between 4 and 12 inched, bases on the inner diameter of the intake cylinder. A small hydrocyclone diameter is used for ultra-fine-separation.

The second level equipment- Dachuan desander

hydrocycloneDesander is the second equipment in solids control system, it is used to separate the solid phase particles whose diameter is more than 44μm from drilling fluid.Its main structure is hydrocyclone of 8″, 10″ and 12″, high pressure flow pipes and a small shale shaker at the bottom.

Desander Hydrocyclones are used to provide efficient and reliable separation of sand and solids from produced water, condensate and gas stream. They have proven to be a valuable part of many oil and gas production facilities. The cyclone liner size and type selected is dependent on the process fluid, temperature, pressure and the concentration and type of solids present in the liquid ( Water or oil) or gas stream.

For the work principle of hydrocyclones, it works like this. Firstly, the drilling fluids are sucked up to 0.25Mpa ~ 0.4Mpa by sand pump, and enter into the cones through the side inlet which is normally only 2-1/2″ diameter. Then The fluids flow spirally inside of the cone. Effected by the centrifugal force, the heavy solids in the fluids would be throw towards to the inner wall of the cones, go down to the bottom, and discharge through the sand discharge port, while the light fluids would go up and discharge through the upper outlet. The diameter of the bottom discharge port is adjustable, and with a cover of hydrocyclone.

desander

As an quick-wear part of desander, the lifetime of hydrocyclones is not so long as other parts. So it is neccessary to check their working condition, and replace them with new ones. As a whole set of the hydrocyclone, clamps & flang are also replaced together with the hydrocyclones.

Oilfield Desander for Drilling Mud

DesanderAs an auxiliary device in the petroleum drilling, the drilling fluid desander is mainly used for eliminating the rock debris and sand carried by the drilling fluid from the stratum in the process of drilling operation.

Desanders are installed on top of the mud tank following the shale shaker and the degasser, but before the desilter. Desander removes the abrasive solids from the drilling fluids which cannot be removed by shakers. Normally the solids diameter for desander to be separated would be 44~74μm, and 15~44μm for desilter.

HydrocycloneAs one of the indispensable and important device for stabilizing and regulating those technical indicators of the drilling fluid, the drilling mud desander has also been extensively used in the tertiary purification of the drilling fluid. As the combination of the hydrocyclone desander and the shale shaker screen, the drilling mud desander is the three-level solids control equipment used in the solids control system of the drilling fluid. It is primarily made up of the vibrating screen, the distribution manifold as well as the hydrocyclones.

 

Desanders for recyling drilling mud

DesanderDesanders are used to separate sand which is mixed with drilling muds. During drilling process mud is being poured as excavation is getting deeper, this mud also mixes with soil, thus being contaminated with sand and silt, in such a way, that when excavation is finished, it is necessary to recyle mud in order to separate sand from mud and get a clean mud that will be used in next excavations. Each country establishes its own regulations on maximum allowed sand content in drilling mud before concreting operation is carried out, in order to prevent concrete contamination with sand and soil, and Desanders are used for this purpose.

The desander should be located downstream of the shale shakers and degassers, but before the desilters or mud cleaners.

A volume of mud is pumped into the wide upper section of the hydrocylone at an angle roughly tangent to its circumference. As the mud flows around and gradually down the inside of the cone shape, solids are separated from the liquid by centrifugal forces.

The solids continue around and down until they exit the bottom of the hydrocyclone (along with small amounts of liquid) and are discarded. The cleaner and lighter density liquid mud travels up through a vortex in the center of the hydrocyclone, exits through piping at the top of the hydrocyclone and is then routed to the mud tanks and the next mud-cleaning device, usually a desilter. Various size desander and desilter cones are functionally identical, with the size of the cone determining the size of particles the device removes from the mud system.

 

Installation and Operation of Desanders

DesanderDesanders are hydrocyclones larger in diameter than 5″. Desanders are installed down stream from the shale shaker. The desander removes sand size particles and larger drilled solids, which have passed through the shale shaker screens. These solids are discarded along with some liquid into the waste pit. The clean mud is then discharged into the next pit ready to be run through the desilters. When installing a desander, follow these general recommendations:

1 Size the desander to process 100-125% of the total mud circulation rate.
2 Keep all lines as short & straight as possible with a minimum of pipe fittings. This will reduce loss of pressure head on the feed line & minimize back-pressure on the overflow discharge line.
3 Do not reduce the diameter of the overflow line from that of the overflow discharge manifold.
4 Direct the overflow line downward into the next downstream compartment at an angle of approximately 45%. The overflow discharge line should never be installed in a vertical position, doing so may cause excessive vacuum on the discharge header and pull solids through the cyclone overflow, reducing the cyclones efficiency.
5 Keep the end of the discharge line above the surface of the mud to avoid creating a vacuum in the line.
6 Install a low equalizer line to permit backflow in to the desander section.

Operating desanders at peak efficiency is a simple matter, since most desanders are relatively uncomplicated devices. Here are a few fundamental principles to keep in mind.

1 Operate the desander unit at the recommended feed manifold pressure, usually around 30 PSI. A feed pressure too low decreases efficiency and a pressure too high puts un-due wear & tear on the cyclone.
2 Check cones regularly to ensure the discharge orifice is not plugged.
3 Run the desander continuously let fluid overflow back and process over & over.
4 Operate the desander with a light spray rather than a rope discharge to maintain peak efficiency.
5 Maintenance of desanders normally entails no more than checking all cone parts for excessive wear and flushing out the feed manifold between bores. Large trash may collect in feed manifold, which could cause cone plugging during operation. Preventive maintenance minimizes downtime & repairs are simpler between bores, rather than during drilling operations.

 

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