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.

Desander group manufactured for piling project

To retrieve the bentonite used in construction for engineering foundations (like diaphragm wall, piles, etc..) and some underground works, Desanders provide with a reliable and compact design which allow reuse bentonite mud after use and contaminated with sand and silt. The laws of each country requires a maximum percentage of sand in the sludge before starting concreting.


There are basically two types of Desanders: simple and double cyloning:

Desander of simple cycloning: land recommended for sandy or sandy little bit thin. Sludge only happen once the cyclone after passing through a phase of screening in order to remove larger material.

Desander of double cycloning: need for sand or fine sand with many. Similar to single cycloning, with the difference that the sludge pass twice through the cyclone so as to separate the finest sand and silt even.

Main Applications:

1- By fully purifying slurry, it is favorable to control slurry index, reduce drill stucking phenomena, and improve drilling quality.
2- By thoroughly separating the slag and soil, it is favorable to enhance drilling efficiency.
3- By realizing the repetition use of slurry, it can save slurry making materials and thus reduce the construction cost.
4- By adopting the technique of closecycle purification and low water content of removed slag, it is favorable to reduce environmental pollution.

DC solid control has the 60 m³/h, 240 m³/h size avaiable for your foundation bored pile bentonite recycling.

DCS630-3 shale shaker used for water well drilling

DC Machinery Manufacturing designs and manufactures portable mud management (shale shaking) machines for water well drilling companies. Shale shakers are often simply called “shakers.”

The model of DCS630-3 shale shaker is a professional unit for water well drilling whose treating capacity is about 120m3/h and with linear motion movement locus.

shale shaker

3 Panel Linear motion DCS630 shale shakers meet the needs of solids separation in a large number of different industries. To name a few, Drilling, (whether it be used in Oil and Gas as a primary or drying shaker, Water Well, or HDD), Dredging, Mining and Dewatering for waste disposal.

For water well drilling, the 3 phase solids control normally is enough, but for oil drilling especially the deep well drilling, after mud cleaner, the solids control system will fit with one middle speed decanter centrifuge for barite recovery and High gravity solids separation, and one high speed decanter centrifuge for fine and ultra fine solids (Low Gravity solids) separation.

Functional and work flow of drilling fluid mud cleaner

Drilling fluids mud cleaner is the second or third stage drilling fluids solids control equipment in drilling fluids recycling system. This oil drilling fluids cleaner will handle the solids particle after being treated by the first grade separation equipment.
Following is the introduction of the drilling fluid mud cleaner.



Work Process of Mud cleaner:

The weighted mud flows to the inlet head section of the desander and/or desilter entering the hydrocyclones for separation of particles. Mud leaving the underflow is further screened with fine mesh to separate larger particles allowing only barite-size particles to pass through the screen.

Features of Drilling Mud Cleaner:

High wear resistance: The cyclone uses special polyurethane with high wear resistance.
Uniform Pressure: Circular tower separation and feeding pipe with heavy caliber make cyclones have uniform pressure.
High Separation Efficiency: Tangent feeding and streamline design improve separation efficiency.
Multi-Purpose: The shale shaker for this item can be treated as level A shale shaker through tube shunt.
Easy to Handle: With digital control panel, you can use it and handle it as easy as possible.
Easy to Connect with Other Equipment: Mud cleaner could be easy to connect with other related solid control equipment to work

You are welcome to call Dachuan Machinery to get more infos about the mud cleaner and we are appreciated to supply the cost-effective products and service for you.

What does the working flow of vacuum degasser

Vacuum degassing is a technique of removing dissolved gas from a liquid solution by lowering the pressure inside a vessel containing the solution.

Vacuum degassing processes involve the exposure of molten steel to a low-pressure environment to remove gases (chiefly hydrogen and oxygen). The effectiveness of any vacuum degassing operation depends upon the surface area of liquid metal that is exposed to low pressure. This process is typically performed in a specially designed chamber known as a vacuum degasser.

vacuum degasser

The reduced pressure inside the vessel or chamber causes the gas to become less soluble and separate from the liquefied material. After the vacuum degassing process is complete, the gas is removed from the vessel, and the pressure is returned to normal.

Vacuum degassing to remove carbon not only reduces imperfections, but also makes metals more ductile, or easily shaped and formed through cold metalworking.

Customized design mud cleaner for a domestic clients

The mud cleaner is the second stage mud equipment of solid control system. DC Solid control customized a mud cleaner fully according to the domestic users requirements. Now the mud cleaner was assmebly well and prepare for delivering.

DC drilling mud cleaner are combined from Desander, Desilterand an Underflow Screen, at the same time Mud cleaner has the higher cleaning function compared with separated desander and desilter. In addition to the reasonable design process, it equals another shale shaker.

DC mud cleaner structure is compact, it occupy small space and the function is powerful. Mud cleaner is the ideal device of the second class and the third class solid control to treat the drilling mud.

DC mud cleaner is a normal model of our company,we can design customized cost-effective mud Cleaner for customers special needs.Our mud cleaner can meet almost all needs for oil & gas well drilling fluids treatment system and HDD Mud Recycling System.

DC installs oil tanks at customers location

As a leader in the supply of high-quality solid control equipment, DC Machinery supports its customers with safe and reliable tank installations.

DC Machinery professional services ensure that your product is safe and secure, while keeping in compliance with environmental regulations in the communities we operate.



Oil tank is the major corollary equipment in oilfield drilling rig, it is mainly used to store and provide fuel to generator set. The oil tank designed and produced by our company is easy and convenient to use and maintain.

DC installs gas and diesel tanks at customer locations ranging in sizes from 500 to 10,000 gallons. Each tank maintains our highest standards for quality, durability and performance. Rates on installation and equipment are based on customer volume and contract.

Mud agitator finished the package and wait for delivering

Yesterday, DC Solid control already finished the order of mud agitator and now waiting for delivering to TianJin port. The mud agitator ordered by Hong Kong clients used for construction industry.

Mud agitators are highly efficient mud mixing units offered in a wide variety of custom sizes and configurations to accommodate virtually any mud tank. Both horizontal and vertical drive configurations are available for all sizes of mud agitators



DC Mud agitators are invided into Horizontal and Vertical Agitators. Available horsepower ratings: 5, 7.5, 10, 15, 20, 25 and 30.
Horsepower, mechanical configuration, impeller diameter, and shaft length are customised to tank dimensions and maximum mud weights. Agitator include explosion proof “C” faced motor.



The horizontal drive is designed for installations having limited space above the mud tank. The vertical drive agitator employs and all helical gearing system, the horizontal drive utilises a helical bevel system to drive the agitator shaft.

Advanced Mud Cleaner provided by Dachuan Machinery

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

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.



With our in-house engineering and design capabilities, DC Solid control can integrate any number of hydrocyclone arrangements with any of our shakers. In all cases, DC Solid control’s hydrocyclones come with polyurethane bodies, where erosion resistant inserts are available. Standard hydrocyclone cone sizes available include 4”, 5”, 10”, and 12” and can be provided in arrangements of one to 20 cones.



The first step in using a mud cleaner is to send the mud through a hydrocyclone, because it would be too thick for the cleaner to effectively work with. A hydrocyclone is a device that uses force to push purified mud through the top of the cyclone as thicker particles pass through the bottom section. Anything that goes through the bottom section then meets the mud cleaner.

You are welcome to call Dachuan Machinery to get more info about the mud cleaner and we are appreciated to supply the cost-effective products and service for you.

Key part is the Hydrocyclone for desander and desilter

Desander and desilte is an important of mud cleaning system, aslo which can combination with bottom shale shaker to be one unit, we call is mud cleaner. As we know the key part of desander and desilter is the hydrocyclone.

Usually the cone diameter is more than 6″is called Desander, and used as the second-control equipment in drilling operation. We commonly used 8 “and 10” cones desander to separate solid-phase particle size 47-76μm in the drilling fluids.


Desilter is the third class solids control equipment to treat the drilling fluids. According to the size of the cone diameter, they are divided into Desander and Desilter. Usually the cone diameter is less than 6″is called Desilter, and used as the third-control equipment in drilling operation. We commonly used 5 “and 4” cone to separate solid-phase particle size 15-47μm in the drilling fluid.


Hydrocyclones are preferred units for sizing or desliming large slurry volumes cheaply and because they occupy very little flor space or headroom. They operate most effectively when fed at an even flow rate and pulp density and are used individually or in clusters to obatin desired total capacities at required splits.