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Monthly Archives: October 2012

High quality drilling mud agitator for sale

Drilling mud agitator is an assistant equipment for complete drilling fluids system. We all know, they are mounted on mud tanks. And usually used together with mud gun.

Mud agitator is used in surface mud system to suspend solids and maintain homogeneous mixture throughout the system. Mud agitator can be used widely in various applications. Including drilling mud mixture, chemical agitating, food or beverage, etc.

JBQ Mud Agitator produced by china manufacturer-DC Machinery, the reducer adopts worm or worm wheel, with tight structure, good meshing performance and reliable work, The explosion-proof electric motor and reducer input shaft are connected through elastic shaft coupling instead of belt transmission, and therefore rotation speed of the wave wheel is constant, the maxing intensity is large and the range is wide, which has structurally avoided the phenomenon of engine’s overload at startup, suitable for wild field operation under poor conditions, and it is convenient to be installed, regulated or replaced.

JBQ series mud Agitator Less than 5.5 kW drilling mud Agitator adopts the blender cycloid speed reducer, and it is applied to the drug liquids mixing tank. This 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.

 

Shale shaker for primary solid control

The shale shaker, in various forms, has played a prominent role in oilfield solids control schemes for several decades. Shakers have evolved from small, relatively simple devices capable of running only the coarsest screens to the models of today. Modern, high-performance shakers of today are able to use 100 mesh and finer screens at the flow line in most applications.

This evolutionary process has taken us through three distinct eras of shale shaker technology and performance. These eras of oilfield screening development may be defined by the types of motion produced by the machines:
Unbalanced elliptical motion shale shaker; Balanced Circular motion shale shaker; Linear motion shale shaker; Balanced elliptical motion shale shaker.

At present commonly used shale shaker is the linear motion shale shaker. The linear motion shale shaker uses two motors vibrate in-phase for separation. The electric vibrator and the electric equipment in the electric control system are imported explosion proof appliances. The linear motion shale shaker is constituted by five parts: foundation, screen case, mud case, dip angle regulation equipment, electrical control system

The screen area is big, the capacity and screening efficiency is high. The linear motion track quickens the discard and improves screen efficiency. The basket can be adjusted to different angles to cope with different environments and drilling liquid conditions. The screen is durable and easy to install and maintain.

DCS series linear motion shale shakers are produced by china manufacturer-DC Machinery, has growing into a leading manufacturer in China for linear motion shale shaker. Any questions or interest please contact us freely.

 

How to match centrifuge and vacuum degasser

Yesterday I wrote the matching of  shale shaker, desander and desilter. In solid control system, drilling fluid centrifuge and vacuum degasser is also needed to be matched reasonably.

The choice of drilling fluid centrifuge

Drilling fluid centrifuge is the last level solid control equipment, mainly used for eliminate 2-10μm solid particles from drilling fluid. There are two types centrifuge: one is used for recycle barite from weighted drilling fluid, the treating fluid is the underflow of desilter; another is used for eliminate solid phase from non-weighted drilling fluid, the treating fluid is the overflow of desilter. 

Drilling fluid centrifuge mainly used for drilling deep well and superdeep well. It’s little significance to drill shallow well. Choosing suitable sand pump to match centrifuge is very important in use.

The match of vacuum degasser

Vacuum degasser is used for eliminate gas in the drilling fluid, the processing capacity should reach full flow dispose. Vacuum degasser must be installed after shale shaker but before sand pump. Because if the drilling fluid contains gas, centrifugal pump will occur to cavitation, the cavitation is not only reduce performance of drilling fluid sand pump, engender noise and vibration, reduce life, but also make the sand pump can’t work in serious.

The functions of vacuum degasser are two points: one is to ensure drilling fluid performance relative stability and to prevent the blowout, kick accident, ensure drilling safety; the second is to guarantee the swirler can work normally. In the drilling of deep exploration well, gas well and oil &gas well, must be equipped with vacuum degasser.

 

How to match the solids control equipment

Reasonable matching and using of solids control equipments is very important, the following are how to choose shale shaker, desander and desilter reasonably.

The choice of drilling fluid shale shaker

Drilling fluid shale shaker is the first level equipment for eliminating solid phase, and must be used in the whole well drilling process. The particle size range is determined by screen standard. The sieve mesh number is larger, the thruput is less, the particle size of eliminated solid phase is smaller, the quantity of eliminated solid phase is larger.

From the angle of production, hope to use detail screen, from the angle of economy, the life of detail screen is low, therefore using shaker screen should be considered synthetically. With the development of mechanical laminated screen and the chemical bonding type laminated screen, the life of fine-mesh screen and purification level of drilling fluid shale shaker are improved effectively.

The choice of drilling fluid desander and desilter

In order to meet the requirement of disposing all drilling fluid, desander and desilter must be constituted by several hydrocyclone cones. For ensure the normal work of hydrocyclones, the liquid inlet pressure must be kept 0.25~0.35MPa. Due to the cones of desilter are more, pipeline is long, so the liquid inlet pressure should take larger value; the cones of desander are little, pipeline is short, so the liquid inlet pressure should take lesser value.

The liquid inlet pressure mainly depends on whether the matched sand pump is reasonable, thus it is important for choosing sand pump. Throw of sand pump is about 40m generally, the discharge capacity is equal to the marked thruput of desander and desilter, can satisfy the use requirement. Meanwhile, choosing desander and desilter must refer to the max thruput of drilling pump, achieve reasonable match.

The match of solids control equipment also include the centrifuge, vacuum degasser and tanks. Tomorrow I will write the choice of centrifuge and vacuum degasser.

Working principle of drilling mud Decanting Centrifuge

Drilling mud decanting 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. 

The following is the working principle of Decanting Centrifuge.

The centrifugal separation is aimed at separating solid from drilling fluid, or separate two kinds of miscible liquids which are incompatible and different density. In the miscible liquids container, because of action of gravity will appear stratification after standing for a space. Maximum density solid particles will sink to the bottom of container, light liquid on top, between them is heavy phase liquid.

The miscible liquids enter into centrifuge drum and rotate. Because of the effect of centrifugal force field, the speed of delamination process will faster than the process which under the action of gravity. The centrifuge generate centrifugal force amount to 400g~3000g acceleration, only need a few seconds can accomplish the separation process, however under the action of gravity need a few hours, even a few days.

When using centrifuge to separate drilling fluid solid phase, drilling fluid enter into drum from high-speed revolution auger conveyor hollow shaft, under the high-speed revolution of drum and conveyer, solid particles move to drum wall, and sink to drum wall of centrifuge, little particles and liquid phase in nexine.

The area between the drum inwall and auger stripper ektexine is called depression area. Separated drilling fluid flow out from drum big end overfall. The vanes of auger conveyor push sedimentary particles to dehydration area, at last expel from drum small end.

 

Commonly used Centrifugal Pumps in Solids control system

In the solids control system there are three kinds of commonly used pumps: centrifugal pump/sand pump, shear pump and submersible slurry pump.

Centrifugal pump/sand pump

Centrifugal pump is also called sand pump, is the ideal equipment to provide impetus for desander, desilter and jet mud mixer.  It can also be used as Charge Pump auxiliary perfusion for mud pump and Trip Pump for drilling well head.

Because of drilling fluid is a kind of suspension liquid which has a large number of solid particles and all kinds of chemical additive, therefore the material of impeller and volute are required to have enough wear resistance and corrosion resistance.

The working environment of centrifugal pump is bad, needed to deliver the drilling fluid for a long time, so the seal of shaft end is required to be very reliable. Meanwhile, as the power source of hydrocyclone, it is very important to match the flow and pressure of centrifugal pump and hydrocyclone. Otherwise, the hydrocyclone can not to work normally.

 

Drilling fluid Shear pump

Shear pump is a new tape equipment which provides the fast configuration and treatment mud for the user, the user satisfy with configuration high performance mud. Shearing pump can mix effectively and hydrate completely the material added in the drilling fluid, save the mud material, reduce the time of configuration, and provide the high performance mud for the well drilling.

Submersible slurry pump

Submersible slurry pump is with structure of vertical single stage and single suction system overhung centrifugal pump,it is made of abrasion-resistant alloy,it canconvey medium with high concentration particle.There is no bearing and gland seal between impeller and pump body,so the slurry pump is maintenance-free and high temperature resistance.

Slurry pump is the cantilever pump structure of single stage and single suction, with the bearing housing, supporting, intermediate pipe connecting the  pump hydraulic components, the water is discharged out from the drain pipe parts, pump impeller is for semi-shrouded with the agitating vane on the vane extended.

The length of inserting the water by slurry pump is between 800 and 2000, the suction pipe can be matched in case of need. The shaft seal runs into the underwater pump without setting up the shaft seal, drive should be installed the vertical motor on the supporting seat connecting with coupling and pump.

These three kinds of pumps are all important for solids control system.The reason why centrifugal pump is widely used, because of it has a series of advantages of small volume, light weight, large flow, easy to use and easy to install.

If  you have any questions or interest contact us freely.

 

Introduction of S250-2 Shale shaker

S250-2 Shale shaker is a new type self-locking balanced elliptical motion shale shaker, applied for the national patent in 2003, the patent number is ZL02235186.8, the main technical feature is adjust eccentric block angle reasonably, become two turn type eccentric shaft structure, So that the screen box produce balanced elliptical vibration.

Compared with foreign shale shaker, the location of S250-2 shale shaker vibration motor is more flexible, because of internal structure changes, the mechanics model of vibrating system changed, center of force and center of mass superposition, so the motor can be installed on the top of screen box, for reducing width of whole shaker and improving stressed of screen frame.

Technical parameters of S250-2

Screen frame:three shaker screens

Screen area:  2.5㎡

Screen type:  Crochet screen structure

Adjustable Screen box angle:  ±3°

G force:  6.3F

Double-amplitude:  6mm

Horizontal velocity: 0.33m/s

Power of two vibrators: 2*1.84KW

Drive form: vibrator drive directly

Vibrator model: CDX18-8300

The Main structural features

The vibratory force uses reasonable ovality. Solid phase move forward quickly with  rolling mode. Different from solid phase in linear motion which impact screen in motion continuously, leading to the soft rock debris crushing.

Because of using greater throw force, even in clay formation can also eduction thick viscous cuttings smoothly.

The Vibrating motor uses MARTIN vibrator which is imported from Italy and the quality is reliable.

It can change into linear motion shale shaker, suit for special requirement of users.

 

Oilfield decanter centrifuge manufacturer

Decanter 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.

The principle of decanter centrifuge

The horizontal centrifuge utilize the principle of centrifugal sedimentation to separate drilling fluid, the drilling fluid enters into roller from feed pipe, with the action of centrifugal force, solid particles are thrown to the inwall of roller, pass through the vane of spiral stoker to little end of roller, and discharged from bleed hole, liquid phase overflow from overflow hole of big end of roller. Continuous cycle for reaching the purpose of continuous separation.

Introduction of DCGLW series decanter centrifuge

TangShan DaChuan Machinery does many modification and innovation on the details for increasing the thruput and enhancing separation effect.

The DCGLW series decanter centrifuges are produced by TangShan DaChuan Machinery, the following is the technical parameters.

TYPE DCGLW250-980N DCGLW355-1257N DCGLW450X1258N DCGLW600X1200N
Drum Diameter mm 250 355 450 600
Drum Length mm 980 1257 1258 1200
Drum Rotate Speed r/min 3500 3200 3000 2600
Separation Factor 2607 2035 2260 2550
Separation Point μm 2~5
Motor Power (Main) 11kw 37kw 37kw 45kw
Motor Power (Vice) 7.5kw 11kw 11kw
Power Of Fluid Supply Pump 2.2KW 5.5KW 7.5kw 11kw
Maxmum Thruput m3/h3/h 20 35 45 90
Weight kg 1000 2950 3100 4300
SIZE mm 1900×1200 ×800 2900×1850×1400 2900×1900×1450 3200×1600×900

You are welcome to contact Tangshan Dachuan Machinery to get more detailed infos, we will supply our best service for you.
DCGLW centrifuge can be made with power frequency or frequency conversion according to the requirement of the customers.

Drilling mud centrifugal pump for mud cleaning system

The drilling fluid centrifugal pump has a very important role in drilling fluid solid 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.

The basic parts of centrifugal pump are rotary impeller and stationary pump case. Impeller and the pump shaft are connected, and there has some crooked vanes on the impeller. When the pump shaft is driven by outside power, the impeller will spin in pump case. The liquid enters into centre of impeller, get through from vanes and enters into pump case, at last discharged from tangent exit of pump.

Because of drilling fluid is a kind of suspension liquid which has a large number of solid particles and all kinds of chemical additive, therefore the material of impeller and volute are required to have enough wear resistance and corrosion resistance.

The working environment of centrifugal pump is bad, need to deliver the drilling fluid for a long time, so the seal of shaft end is required to be very reliable. The common shaft seals of centrifugal pump have two kinds: packing seal and mechanical seal. The shaft seal ensures the centrifugal pump can work normally and efficiently. When centrifugal pump is working, the pump shaft is rotary but the shell is motionless, if the annular space between them not to seal or seal is bad, outside air will enter into low-pressure area of impeller centre, the flow and efficiency will decrease. In general we can use the mechanical seal or packing seal to realize the seal between shaft and shell.

Meanwhile, as the power source of hydrocyclone, it is very important to match the flow and pressure of centrifugal pump and hydrocyclone. Otherwise, the hydrocyclone can not to work normally. The performance characteristics of centrifugal pump decide the general water pump can’t take the place of centrifugal pump for using.

DC Machinery is a professional manufacturer of  solids control equipment in china, we supply high quality centrifugal pump and other mud cleaning equipments, any interest or questions please contact us freely, we will do our best to you.

 

Drilling fluid shale shaker for solids control

Introduction of shale shaker

As a kind of common machinery, the shale shaker is widely used for the departments about mine, metallurgy, coal preparation and food industry, etc. The main functions are screening, dehydration, desliming, material transportation, etc. In drilling process, shale shaker utilizes vibratory screen to recycle the liquid phase of drilling fluid, and as the standard of whether the solid phase can pass the sieve meshes or not, making the solid particles of different sizes separated into two groups or over two groups sizes of the machinery equipments, in the oilfield scene, it called drilling fluid shale shaker, short for shale shaker.

Shale shakers are the primary solids separation tool. After returning to the surface of the well the used drilling fluid flows directly to the shale shakers where it begins to be processed. Once processed by the shale shakers the drilling fluid is deposited into the mud tanks where other solid control equipment begin to remove the finer solids from it. The solids removed by the shale shaker are discharged out of the discharge port into a separate holding tank where they await further treatment or disposal.

The constitute of shale shaker

Buffer slot: The drilling fluid which returned to ground from shaft bottom flow into the buffer slot which is installed on the shale shaker, reducing the flow velocity of the drilling fluid, and making the drilling fluid flow into the screen evenly and slowly.

Screen case: For tensioning the screen, bracing the vibration exciter, and making the sustained vibration which comes from vibration exciter deliver to the screen, thus reaching the screening purpose.

Screen: This is the important component for cleaning up solid phase and recycling the drilling fluid, the size of solid phase particles which are eliminated by shale shaker depend on the size of sieve pore completely.

Vibration exciter: It is the power producer of the screen case vibration. The exciter brings the periodic exciting force, and makes the screen case generate persistent and periodic vibration.

Damper spring: Brace the screen case and vibration exciter. Ensure the screen case has enough vibration space, meanwhile, assist the screen case in achieving the required vibration.

Foundation: Brace the above components, easy to install and transport.

Linear motion shale shaker

In oilfield industrylinear motion shale shakers are widely used for drilling mud solids control of oil gas well drilling rig.

DCS series linear motion shale shakers are produced by china manufacturer-DC Machinery, has growing into a leading manufacturer in China for linear motion shale shaker. The shale shaker uses two motors vibrate in-phase for separation. The electric vibrator and the electric equipment in the electric control system are imported explosion proof appliances. The screen area is large, the capacity is high and the screening efficiency is high. The linear motion shale shaker track quickens the discard and improves screen efficiency. The basket can be adjusted to different angles to cope with different environments and drilling fluid conditions. The screen is durable and easy to install and maintain.

Shale shaker is the necessary equipment in the well drilling equipments at present. Moreover, the job content of shale shaker will direct influence on the desander, desilter and centrifugal. Compared with swirler, centrifuge and degasser, the wasting power of shale shaker is the least, and the investment is little, as a result, shale shaker is the most economical equipment in the present solid control equipments.

Any interest or questions please contact us freely.

 

 

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