Main parts of Mud cleaner-Polyurethane molded hydrocyclones

With the combination of a desander and desilter mounted over a powerful multi-functional shale shaker, DC’s line of mud cleaners offer both high performance and versatility for the operator.

The main parts of mud cleaners is the hydrocyclone. DC’ polyurethane molded hydrocyclones are available in a number of configurations, ranging from 60 gpm systems to 2,000 gpm systems and capable of achieving a solids cut point of 25 microns.

hydrocyclones

Each hydrocyclone is made of high durameter, durable polyurethane and can be fitted with independent valve isolation, discharge deflection devices, and pressure monitoring systems. For abrasive solids, DC can also fit our polyurethane hydrocyclones with ceramic liners to maximize equipment life.

mud cleaner

This integration of advanced equipment puts forth a unit that can handle large volumes of circulating fluids and is able to retain fluid integrity. Features such as our wedge-lock fastening system, mud bypass gate, and explosion proof enclosures all allow for ease of use. Our pride is truly expressed in our work through our craftsmanship, research, design, and the overall practicality of our equipment.

Submersible pumps supply from DC Machinery

Until recently, drilling rig operators typically used cast-iron waste-water submersible pumps to move the spent drilling mud in and out of the reserve pits, but these pumps experienced high failure rates. Because of the weight and high solids content of the mud, the pumps often ran dry or against closed discharges. Some failure modes included:

Broken shafts and impeller bolts
Loosened impeller keyways
Failed seals

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The key components of these pumps—including the impeller, wear plate and agitator—are made of high-chrome iron to withstand abrasion, and the bearings are tough and oversized. These pumps perform better and last far longer than their standard wastewater predecessors in the harsh oilfield environment.

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Submersible slurry pump produced by DC Machinery has the advantages of high efficiency, maintenance free, high temperature resistance, long service life and so on.

Development of centrifuge used for water-solid separation

Centrifuge achieves water-solid separation by settlement and consolidation of solids under the influence of strong centrifugal force generated in high speed rotating machines.

Early of centrifuges:

Although the principle of centrifugal separation was known to early civilosations ., it was not until 1879 that Dr Laval developed the first continuous centrifugal separator.

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Types of centrifuge:

The essential component of all centrifuge ia a rotating bowl in which the solids or heavier fractions in a liquid are separated by centrifugal settlement. There are many variations in arrangement and design detail, but centrifuges may be classified broadly into four main groups:
1 Simple bowl.
2 Perforated bowl.
3. Bowl with conical disc separator.
4. Bowl with scroll sludge conveyor.

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Principle of centrifuge:

The separation is similar in principle to that achieved in a gravity separation process. The driving force is higher because is resulting from the rotation of the liquid: in the case of sedimentation, where the driving force is resulting from the difference in density between the solids particles and the liquid, the separation is achieved with a force from 1000 to 20000 times that of gravity.

If you want to learn more about centrifuges, please contact me freely. Let’s learn together.

Desander Application Purpose and Some Notes Attention

Desander is the 3rd purification equipment. The popular desander cones are 8~12″. DC desander including 3 types based on bottom shaker configuration. Normally 8in, 10in or 12in diameter.

The application of desanders will depend upon the type of mud in use. A desander: shall be run continuously with unweighted water based mud  to maintain low mud gradient, in top hole sections only may be run sparingly with weighted water based mud shall never be used with oil based mud.

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The purpose of use Desanders are :

1.To maintain sand content of mud below 0.5%.
2.To prevent overloading of desilters.
3. A feed rate of 300 – 400 gpm shall be used.

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Desanders shall be balanced to produce a spray discharge using the procedure outlined above before use.Cones shall be stripped and cleaned after every period of continuous use. For optimum performance, the desander overflow should be routed to the desilter suction tank.

Note please Since, in practice, the cut point of most 12” cones may be of the order of 200 – 220 microns for an unweighted water based mud, utilisation of screens of finer than 80 mesh may negate the need for desanders.

Drilling Fluids play an integral role in oil and gas exploration and production.

Drilling Fluids play an integral role in oil and gas exploration and production. When a new well is drilled, some form of fluid is needed. The base of this drilling fluid, or mud, can be freshwater or saltwater (brine) or it may be an oil- or synthetic-based liquid.

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The type of fluid and the additives used are determined in part based on the composition of the rock being drilled into. Cost and environmental impact are also considerations. The mud may also be modified as drilling progresses and the underground environment changes. The mud serves a number of important functions:

lubricating and cooling the drill bit, thereby extending its life
transporting rock fragments (cuttings) to the surface,
preventing the wellbore from caving in before the casing is inserted, and
preventing the oil or gas from entering the well before it’s completed.
Ideally and increasingly, this fluid is recycled during drilling. To facilitate reuse, cuttings are allowed to settle out in a pit and the resulting liquid is pumped back to the wellbore.

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Water is often a natural byproduct of the drilling and production process. Water may be trapped underground along with the oil and gas. Sometimes this produced water is incorporated and used in the drilling process.

This simple overview illustrates the fact that drilling a new well is a complicated process with many moving parts — literally. A variety of providers are necessary at different times to deliver their unique services until a well is completed.

Multiple functions of DC Double deck Mud cleaner

As is known to all, for Mud Cleaning System treatment, there is single deck shaker and double deck shaker. Considering the fact field application of Mud Cleaning System is combination of cyclones and shale shaker.

In some cases such compact footprint can save location around the mud cleaner and save cash for the operator. We have many design models of double deck mud cleaners it depends upon the treating capacity you necessary as well as your budget.

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Double deck mud cleaner DCQJ may play a role as desander, desilter and double steps of shale shaker. The low deck screen is first separation part of mud cleaner with comparable coarse screens as the upper deck is finer like a drying shale shaker for that desander and desilter cones.

We make use of the dual function double deck shale shaker within the compact style bored piles desander unit, and make a mud cleaner, shale shaker, hydrocyclones, centrifugal pumo, mud hopper in a single skid. It may be utilized for HDD, bored piles desander unit, water well drilling, trenchless,and so on projects.

If you have interesting of DC Mud cleaner, please contact us.

Matching using the mud gas separator and vacuum degasser in mud system

In oilfield mud system, there are two equipment used for removing the harmful gas from drilling fluids. They are mud gas separator and vacuum degasser.

Vacuum degassers utilize negative pressure to withdraw entrained gases from the mud. In order for this to work, mud is pumped through a venturi, which develops a negative pressure, thus sucking mud into the unit. The mud then flows over dispersion plates, arranged either horizontally or vertically, creating thin sheets of gas-cut mud. These dispersion plates bring entrained gases closer to the surface for easy removal by a stand-alone vacuum pump. The choice between horizontally or vertically mounted units is typically based on the footprint requirements of the specific rig.

vacuum degasser

Degassers are used to remove the small entrained gas bubbles left in the mud by the mud/gas separator. These units are positioned downstream from mud/gas separators, gumbo removal equipment (if utilized), shale shakers and mud conditioners (if utilized), while hydrocyclones and centrifuges follow in the arrangement.

Mud/gas separators and degassers mechanically remove entrained gases such as hydrogen sulfide, carbon dioxide and natural gas from the mud system. Entrained gas can reduce the hydrostatic head of the mud column and can cause catastrophic well control problems. BRANDT manufactures both mud/gas separators and degassers.

mud gas separator

Mud/gas separators are the first units of solids control equipment arranged to treat mud. As such, they process all of the mud from the flowline before the mud reaches the primary shale shakers. The units have no moving parts and rely on the density difference between the gas and the mud for removal. The process is simple, yet very effective.

Type of drilling fluid and the additives used in oilfield

Fluids play an integral role in oil and gas exploration and production. When a new well is drilled, some form of fluid is needed. The base of this drilling fluid, or mud, can be freshwater or saltwater (brine) or it may be an oil- or synthetic-based liquid.

The type of fluid and the additives used are determined in part based on the composition of the rock being drilled into.

drilling fluid

Cost and environmental impact are also considerations. The mud may also be modified as drilling progresses and the underground environment changes.

Ideally and increasingly, this fluid is recycled during drilling. To facilitate reuse, cuttings are allowed to settle out in a pit and the resulting liquid is pumped back to the wellbore.

Water is often a natural byproduct of the drilling and production process. Water may be trapped underground along with the oil and gas. Sometimes this produced water is incorporated and used in the drilling process.

Production stage of shale shaker in DC Workshop

Shale shaker is a common used product for water well drilling, HDD, Oil&gas drilling, CBM and ect. We have many types of shale shakers, such as linear motion, elliptical motion, dual motion accoridng to the movement locus.

Recent days, DC Machinery manufacturing a linear motion shale shaker for a India clients who are focus on Horizontal directional drilling. So far, we finished the shaker box production.

shaker

The model of the shale shaker is DCS630-3, which has 3 panel shaker screens whose dimension is 630x1250mm. Inlet flow is 120m3/h. The models is the hot sale unit in HDD industry.

shale shaker

All of DC shale shakers adopt Italy OLI brand motors which have the advantages of high strength vibration, large screening area, adjustable screen box angle, little noise and high efficiency. Heat treatment of the complete shaker deck.Surface painting with heavy anticorrosion to extend the service life of shale shaker.

If you have interesting with it, please contact us.

Feeding pump- screw pump for decanter centrifuge in drilling mud process stage

Screw pump is an ideal pump for drilling mud feeding to decanter centrifuge without shearing or agitating the drilling mud. Compared to centrifugal pumps, screw pumps can move drilling mud axially without turbulence. They are also able to pump fluids of higher viscosity without losing flow rate. Also, changes in the pressure difference have little impact on screw pumps compared to centrifugal pumps.

screw pump

The main parts are screw shaft (rotor) and screw shaft bushing (stator). Because of the special geometry shape of the two parts, they form pressurize capacity separately. The fluids flow along with the shaft, inner flow speed is slow, capacity remains, pressure is steady, so it will not generate vortex and agitating. The shaft of the pump is made from Stainless steel, DC Screw pump is available for option with complete stainless steel body. It can drive by coupler, or adjust the speed by using variable speed motor, Triangle V-belt, gear box, etc.

DC is a professional oilfield drilling fluid screw pump supplier and manufacturer in China oil drilling mud solids control and drilling waste management industry.As the pioneer in this industry.

DC is capable of providing customers with series products ,such as oil & gas drilling fluid solids control equipment, decanter centrifuge, drilling waste management equipment and drilling security equipment.