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Monthly Archives: December 2012

Supply DCSB series Centrifugal Pump

The drilling fluid centrifugal pump has a very important role in solids control system, mainly used in extracting the drilling fluid which has viscosity and has solid particles, and it is the power source of desander, desilter and jet mud mixer.

DCSB series centrifugal pump is our factory according to the construction situation to manufacture. The pump flow passage components are made of modern metal wear-resistant material, with strong resistance to wear and cavitation performance, particularly suitable for pumping silty sand and long distance transport sediment, light weight, dismantling convenient, high efficiency and energy saving. Suitable for transporting drilling fluid.

Features of DCSB series Centrifugal Pump:

1 Centrifugal pump impeller type is half open, the quantity of blade is less, blade radial is small, blade width is large, blade inlet angle is big, outlet angle is small. Blade line font is logarithmic spiral line, in order to confirm its inhaled, good abrasion resistance, the efficiency is higher than the circular arc line blade of 6% – 10%.

2 Seal form using the latest mechanical seal oil seal and new type of oil contamination asbestos packing ring seal that integrated shaft seal. Pump shaft seal using packing seal.

3 Centrifugal pump has some advantages: low pressure, large displacement, good inhaled, high efficiency and stable running, maintenance and adjustment is simple and convenient, leak amount is very little, service life is long, can widely meet the requirement of users.

Any interest or question please contact DC Machinery freely.

Submersible slurry pump four faults and solutions

Submersible slurry pump is a kind of centrifugal pump, and play an important role in solids control system. The following is the four faults and solutions about slurry pump.

Submersible slurry pump don’t absorb water.

The reasons of submersible slurry pump don’t absorb water have many possibility, the most main reasons are due to suction pipe block and impeller damage. To solve this problem, the main method is clean suction pipe blockage and repair or replace impeller.

Submersible slurry pump power is too large.

The reasons of too large submersible slurry pump power mainly include excessive packing compaction, friction in pump, bearing damage and pump roll quantity is too large. Solutions of the four faults are unscrew packing gland bolt, adjust the gap in pump, repair or replace damaged bearing, regulating the operation of pump.

Submersible slurry pump bearing fever.

The reasons of submersible slurry pump bearing fever generally due to lubricating oil and bearing, include not clean lubricating oil, lubricating oil in bearing is too much or too little, bearing damage, etc. The main solutions are use clean lubricating oil, according to the requirements add lubricating oil for bearing, repair or replace new bearing.

Submersible slurry pump bearing life is short.

Submersible slurry pump bearing short life is due to friction in pump, impeller unbalanced, foreign body in bearing, unreasonably equip bearing, centre shaft is tortuous. Solutions are adjust impeller balance or replace new impeller, clear bearing foreign body, equip bearing again, change centre shaft.

Matters needing attention of using shear pump

Shear pump is on the basis of existing centrifugal pump theory, through the improvement to develop a new, efficient centrifugal pump, is designed for quick preparation and dispose drilling fluid in the solids control system. The main application is shear polymer clay, it can mix material effectively, fully hydrate material, save material using, shorten drilling fluid preparation time, supply good drilling fluid performance to drilling process.

Matters needing attention of using shear pump:

1 After using shear pump, we should use clear water flush pipeline and shear pump, to avoid leftover block runner and nozzle of impeller.

2 If the shear pump begin to used after nonuse for a long time, we need to fill lubricating oil in combination seal cavity and bearing bore.

3 Before starting shear pump, we must open inlet and outlet valve of pump firstly.

4 Bearing bore is filled in grease about 10~20ml every other week, combination seal cavity is filled in grease about 10~20ml every day.

5 Adjust the small gland of combination seal cavity once a week, When cannot adjust should change the two packing in time.

6 In winter, if the pump will not used for a long time, drilling fluid in pump shell should be discharged, to avoid drilling fluid freeze.

 If we can maintain shear pump correctly, the working efficiency of shear pump will be improved greatly, and the service life will be also extended.

Four panel shale shaker for sale

DCS700-4 Shale Shaker is mainly used for drilling fluid separation in oilfield drilling. It is consist of deck adjustment, vibration motor, shaker deck, base frame, support, baffle box, explosion proof starter, shaker screen, wedge plate, torsional spring, etc.

DCS700-4 Shale Shaker Parameters:

Treating capacity: 572GPM

Screen area: 2.94㎡(4 panels)

G-force: ≤7.0G (adjustable)

Motor power: 2×1.72KW

Vibration mode: Linear motion shale shaker

Amplitude: 5~6mm

Angle of Screen: -1°~5°

Features of DCS700-4 Shale Shaker:

To guarantee the durable structure of the shale shaker, the material is the GB steel from Beijing Shougang Company Limited, Shanghai Baogang Iron and steel Co., Ltd. and Tangshan Iron and steel Co., Ltd.

The used vibration motor is from the Italia joint venture Company named Oli. The motor has much advantage, like high strength vibration, large screening size, adjustable screen box angle, little noise, excellent performance and high efficiency.

Shaker screen will be tensioned by wedge plate, this is more convenient and easy for operation it is very reliable.

Shaker deck is adjustable, the adjustment is worm wheel and screw type. Beside shaker deck two sides middle shaft is connecting two worm, when we make adjustment the shaker deck will be consistent and in-phase.

The complete shaker body will be treated by sand-blast, paint it by anticorrosive painting so it is more anti-corrosive and better appearance.

Any interest or questions please contact DC Machinery freely.


Two panel shale shaker for sale

DC Machinery developed a new type shale shaker, model is DCS830-2. The shale shaker can meet the requirement of less treating capacity, and economic way to separate solids from drilling fluid.


DCS830-2 shale shaker parameters:

Treating capacity: 352GPM

Screen area: 1.8㎡(2 panels)

G-force: ≤7.0G (adjustable)

Motor power: 2×1.3KW

Vibration mode: Linear motion shale shaker

Amplitude: 5~6mm

Angle of Screen: -1°~5°

This linear motion shale shaker DCS830-2 can be widely used in HDD, water well drilling, shadow drilling and other drillings which need small treating capacity. After the new mini shaker developed, there are many clients showed their interests about it. Previously they have to use bigger shale shaker with 2-panel or even 3-panel.

Any interest or questions please contact DC Machinery freely.


Supply high quality Decanter Centrifuge

Decanter centrifuge also known as Horizontal screw discharge sedimentation centrifuge, is the special equipment of solid-liquid separation, designed by the characteristic of drilling fluid. It can accomplish each procedure of feed, centrifugal sedimentation, unloading, etc.

It mainly uses for recycling barite, eliminating small solid, reducing the solid content of drilling fluid, controlling the density and viscosity of drilling fluid, ensuring the performance of drilling fluid, and play an important role in quick drilling.

DC Machinery is a professional manufacturer of decanter centrifuge. DCLW series centrifuge has the advantages which other centrifuge can’t compare:

1 The adaptability about material is larger, separated solid phase particle size range is 0.005-2mm, and can separate uneven size of solid phases as usual.

2 Can running automatically, continuously and longly, convenient to maintain, and can do closed operation.

3 Single centrifuge production capacity is large, compact structure, covers an area of small, low operation cost.

4 Can realize remote automatic control.

At present, our decanter centrifuge strengthen the thruput and rotate speed of centrifuge, increase the separation factor, the material of centrifuge uses the stainless steel, enhance the corrosion resistance.

Welcome to our website, DC Machinery is  your best choice.

Drilling Mud Agitator made in China

The Drilling Mud Agitator is an important components for mud cleaning system. Mud agitator  has the advantage of compact structure so it occupies small area. More than 7.5 KW mud agitator uses the turbo and worm gear speed reducer, with the large torque transmission, the revolution is steady, it works reliably and has great merit. Common model of mud agitator is JBQ5.5kW, JBQ7.5kW, JBQ11kW and JBQ15kW.

JBQ Mud Agitator produced by china manufacturer-DC Machinery. Following is the features of JBQ Mud Agitator.

The reducer of the agitator adopts a cylindrical worm with an axial section of circular acre. The circular acre teeth of impeller wheel are conjugated with the worm, which provide good convexo-concave engagement, high efficiency transmission, strong agitating ability and compact structure.

New up-down structural agitating impeller wheels have a two-layers structure, which can be used as one-layer and dual-layer one.

The reducer of the JBQ drilling mud agitator  combines with anti-explosion motor, which is suit for rough operation condition in field, and can be repaired conveniently.

The strong agitation, broad conformance and low starting moment of resistance are provided.

The drilling mud agitator Level – placed motor is easy for installation, adjustment and replacement.

JBQ Mud agitator Parameters

Type JBQ2.2 JBQ5.5 JBQ7.5 JBQ11 JBQ15
Power 2.2KW(3.0hp) 5.5KW(7.5hp) 7.5KW(10hp) 11KW(15hp) 15KW(20hp)
Rotate Speed 60r/min
Shaft Length Decided by the depth of the tank.
Number Of Impeller Layers Two layers or monolayer
Impeller Diameter Decided by the inside diameter of the tank.
Remarks If the length of impeller shaft is beyond 1800mm, Centralizer set is required.

Hydrocyclone for desander and desilter

Hydrocyclone is often used to separate drilling cuttings from drilling mud, and often installed on desander and desilter in solids control system.

Hydrocyclone structure

The hydrocyclone is a vessel container with cylinder part, the cylinder part of upper cone is mud inlet room; the outboard install a tangential stock inlet; the underpart of cone is open mouth, the size of caliber is adjustable, use for discharging the solid particles. There is a down inserted overflow pipe on the top centre of close vertical cylinder, and extend to below the stock inlet tangent location. The structure is constituted by cylinder, subuliform tank, mud inlet pipe, overflow pipe, sand settling tube, etc.


Hydrocyclone material

In general, the shell of hydrocyclone is made of cast iron. For improving the wear-resisting property, the inside uses the wear-resisting rubber. For improving the service life further, shells of some hydrocyclones use the polyurethane, both wear and corrosion resistance. About the large-sized hydrocyclone, the shell use the material of alufer, interior use the polyurethane, this not only ensure shell have enough strength, and reduced the weight.

Hydrocyclone installation

The installation of hydrocyclone should be easy to eliminating underflow, and easy to maintain and monitor. Every hydrocyclone group should be equipped with individual mud tank and centrifugal pump. A pressure gage should be installed on the inlet of header pipe to show and measure feed pressure which offered by sand pump. Except cone bottom and header pipe blocking, choose sand pump model wrongly and misoperation will also cause hydrocyclone breakdown.


Airtight drilling fluid solids control system for offshore drilling

Offshore drilling is one of the greatest technological breakthroughs in recent decades, and many new techniques have been developed to profit from the abundance of oil underneath the ocean floor. While drilling for oil has been around for hundreds of years in one form or the another, the effective extraction of petroleum from beneath the sea floor did not surface until the last forty years. The search for oil often turns out to be unproductive, but this practice is vital for the economic future of many nations.


For adapting the drilling requirements on the sea and special areas, easy to transport and install, the USA and USSR produce the airtight drilling fluid solids control system successively since the 1970s. The system is constituted by shale shaker, swirler, mud cleaner, centrifuge, mud agitator and various tanks, carry out the drilling fluid closed cycle process.

The whole devices needed to closed by large metallic box, this system has strong adaptability, in many cases can almost dispose all kinds of drilling fluids, furthest enhancing the treatment efficiency of drilling fluid solid control equipments. Don’t add drilling fluid, and also can keep the density of drilling fluid, handing ability and matched drilling rig are suitable, and can eliminate the drilling cuttings. This kind of system best fit in the water-deficient area or offshore drilling, and will not polluting the environment.

When in offshore drilling, the eliminating drilling cuttings handled by a set of distillation system, to cleaning the greasy dirt and water, and then the disposed drilling cuttings will be discharged into ocean, in this way can reduce pollution.

Airtight drilling fluid solids control system has already achieved success at different areas. On the offshore and ecology sensitive area use airtight drilling fluid solid control system will enhance the efficiency of drilling, and the cost is reasonable.


Centrifugal Pump Manufacturer-DC Machinery

DC Machinery is a China Centrifugal pump top manufacturer,we supply centrifugal pump mainly used for Oil gas drilling mud solids control system, HDD(Horizontal directional Drilling) mud recycling system. Our centrifugal pump can be used as desander desilter feeding pump,mixing pump,supercharging pump,trip pump.

  • Special mechanical seal technology
  • The parts such as flow-passing impeller and case are made of high-wearable cast irons, with service life longer than other products by 50%.
  • The shaft has higher strength that can bear certain load, reduce shaft’s deflection and extend seal’s service life.
  • The bearing is lubricated with lubricants and lubricating grease, The oil seal is made of special structure and materials, suitable for high and low temperatures and complicated environment.
  • Front opening structure is used for convenient installation, repair and maintenance.
  • A case thicker than a normal one is adopted to make rational pass and less turbulence.
  • The impeller is specially designed to have a wider flow pass and smooth vanes, with larger flow area and smooth fluid pass, marking the pump reach the internationally advance level in pump efficiency and energy-saving, 10% higher than similar products.

DC Solid control offers a complete line of centrifugal pumps to accommodate a full variety of drilling applications. Sizes range from 2 × 3 to 6 × 8. Bare pumps, horizontal packages, and overhead belt drive configurations are available. Explosion proof electric motors are available up to 200 HP, in 1200, 1800 or 3600 RPM.

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