Drilling fluid is classified as water base utilizing water as the liquid phase. The solid phase of any drilling fluid is either commercial solids or drilled solids. Most commercial solids such as bentonite have a relative particle size of less than one micron. The shale shaker, in various forms, has played 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 。

Shale Shaker Parameters

TYPE DCS585-3/4 DCS630-3 DCS700-3/4 DCS830-2/3
Shake Locus linear type or ellipse type
Motor Power 2×1.5/1.72KW 2×1.5KW 2×1.5/1.72KW 2×1.3/1.72KW
Shake Strength ≤7.0G
Amplitude 5~6mm
Thruput Per Screen 100/130 m3/h 440/572GPM 120 m3/h 528GPM 110/130 m3/h 440/572GPM 80/130 m3/h 352/528GPM
Angle Of Screen -1°~5°
Motor frequency and voltage 380V/50HZ(Foreign custom motor according to customer requirements)
Screen Area 2/2.73 m2 2.36m2 2.2/2.94m2 1.8/2.7m2
Screen Specification 585×1165mm (40~250) 630×1250mm (40~250) 700×1050mm (40~250) 830×1080mm (40~250)
Remarks The proportion of thruput per screen in the total amount is:1.2g/cm3,the viscosity is:45s

DC designs, manufacture and operate a complete line of advanced balanced-elliptical and linear-motion shakers for all onshore and offshore applications.  Whether used as scalping, primary or stand-alone units, our high-capacity shale shakers deliver unmatched solids removal.  All of our shakers are available for sell or rental.

Advantages

1 The motor of the shale shaker use the vibration motor of import in Italy, the excite of vibration motor can adjust.

2 The screening area of the screen is big, the throughput is large, the effect of the treatment is good.

3 the shale shaker designed with the solidwordks ansys, the structure is optimization, the structure of the shale shaker is simple, compact, the performance is excellent and cost-effective

4 the screen of the shale shaker is the agglutinate screen edge rigidity, use the plate type close fixed, is convenient and quick to replace.

5 the design is reasonable, make the mud buffer, average flow, reduce the directly impact, the life of the screen is long.

6 The shale shaker use the ratchet wheel lift, the structure of lift is easy and easy to operate.

Welcome to inquire drilling fluid shale shaker of DC mud cleaning equipment , and welcome to visit and negotiate the business both at home and abroad ; Our company will provide for you the best shale shaker and other equipment related solid control with superior quality and most reasonable Price. And we will sincerely offer our best service to satisfy what you need.

 

Solid control system is mainly made of a group of store drilling fluid solid control tank and a group of equipment which rid of the solid phase in drilling fluid, solid control tanks which store drilling fluid are divided into circulating tanks and store tanks. Circulating tanks as a part of the ground cycle, there are shale shaker, vacuum degasser, deserter, desande and centrifugal on the surface of tank. The store tank is according to the need of drilling condition to allocated the different performance drilling fluid, or store drilling fluid which used for different drilling condition.

The purification process

1 level1 purification

The mud disposed in shale shaker. The allocation drilling fluid enter into the bottom well under the foundation of the drilling pump and carry drilling cuttings return the ground, through the elevated tubes enter into the shale shaker, the larger rock debris in drilling fluid are screened

2 level 2purification

When drilling fluid have gas cutting, we can use vacuum degasser remove the gas which in the drilling fluid and can recovery the density of drilling fluid, steady the drilling fluid viscosity.

3 level 3purification

The drilling fluid is disposed by the 2level purification enter into the desander through the desander feed liquid pump, the harmful sold phase which the diameter is above 40-60um is separated in desander.

4 level 4purification

The drilling fluid is disposed by the 3level purification enter into the desilter through the desilter feed liquid pump, the harmful sold phase which the diameter is above 15-40um is separated in desilter.

5level 5purification

The drilling is disposed by the 4level purification enter into the centrifugal through the centrifugal feed liquid pump, the small harmful sold phase particles are separated in centrifugal.

Usually, the 5purification is working at the same time. If it works one equipment or several equipments, the parameters of the drilling fluid can meet the work requirements, it can work one equipment or several equipments. After the purification, drilling fluid can enter into the next common drilling cycle.

Now, abroad strengthen the research of the throughput and the speed of the centrifugal, increase the separation factors of the centrifugal, the most of the material of the centrifugal use the stainless steel, increase the corrosive. in order to increase the throughput of the centrifugal, improve the separation factors, a lot of details are amended and innovated.

The sand removing effect of many domestic centrifugal, because the separation factors is small, the separation of many foreign manufacturing is with in500-1000, it is appropriate for fresh water drilling fluid, overall vibration of the centrifugal is big, there are two main reasons;

1 The solid phase in the drum is not washed, have a part of residual sediment, destroyed the balance.

2 The bearing is abraded, the revolve of the drum is unbalance, the throughput of the centrifugal can’t reach the design requirements, the life time is lower recognition of the manufacture.

From the view of the reaction, we need a kind of centrifugal with large displacement, frequency control and speed regulation, so it can aggravate the drilling fluid and dispose the not aggravate drilling fluid. This kind of centrifugal is called all-around centrifugal, the whole system is frequency control and speed regulation, the rotation of speed can be regulated, the most high speed is above 3000r/min, as a high speed centrifugal , the separation factors F1 can reach 3050, as the mass flow centrifugal, the biggest through put is 100m3/h.

       

DCLW horizontal type helical-conveyer centrifuge is a mechine to separate the soild particles and liquid or separate the liquid and mixture mixed in the liquid by centrifugal force. The main function of centrifuge is to separate the liquid and solid particles in the suspension, or to separate the two kind of different liquid with different density which can not dissolve in each other in the emulsion. And also, can be used to remove the liquid from the mixture of liquid and solid. Some sedimentation centrifuge also can classificate the solid particles in the fluid with different density or granularity by identify the different sedimentation velocities.

DCLW horizontal type helical-conveyer centrifuge is special for theseparation of liquid and solid in oil drilling fluid, can finish the percedure of feeding, centrifuge sedimentation, unloading when it is fully operated. The main function is to recover the barite, clean the small solid, decrease the quantity of solid in the fluid, control the density and viscosity of drilling fluid to guarantee a good performance of the fluid.

The centrifuge is widely used in chemical industry, oil mining, food industry, pharmacy, minerals, coal mining, water treatment and shipping.

LW Centrifuge Parameters

TYPE DCLW450-842N DCLW450-1000N DCLW600-1019N DCLW700-1200N
Drum Diameter mm 450 450 600 700
Drum length mm 842 1000 1019 1200
Drum Rotate Speed r/min 2200 2000 1800 1500
Separation Factor 870 860 850 823
Separation Point μm 5~7
Motor Power(Main) 22kw 30kw 45kw 55kw
Motor Power (Vice) 5.5kw 7.5kw 7.5kw 11kw
Power Of Fluid Supply Pump 5.5KW 5.5KW 7.5kw 11kw
Maxmum Thruput m3/h3/h 40 40 60 90
Weight kg 2800 3000 3600 4300
Size mm 2450×1750×1350 2600×1750×1350 2900×1600×900 3100×1700×950

GLW Centrifuge 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

Note:DCGLW centrifuge can be made with power frequency or frequency conversion according to the requirement of the customers.

DC shaler shaker is a new style shale shaker produced by our company, it is the first-level process equipment in the mud cleaning system, to separate the drilling cuttings from the drilling fluid. The shale shaker can be useds exclusively or combined with other machines.

The shale shaker is the most important equipment in the drilling fluid solid control system,  Not only using in deep well, but also using the shallow well, the mud must through the shale shaker to filter.

     

So the importance part is the screen, the size of the mesh influence the purification degree of the mud, the more of the mesh, the solid phase particles to be got rid of will be increase, the less of the mesh, the solid phase particles to be got rid of is decreased. So the screen is easy to abrade.

The motor is other importance part of the shale shaker, the motor drive the exciter to rotate to produce the inertial force of periodic change, get rid of the different size of solid phase particles.

The major factors are throughput and the separation size, now the biaxial liner shale shaker is widely used in the drilling fluid mud cleaning system. There are two equal power motor to work together, make the mud do liner motion, it can increase the throughput of the shale shaker, and extended the service life.

Shale Shaker Parameters

TYPE DCS585-3/4 DCS630-3 DCS700-3/4 DCS830-2/3
Shake Locus linear type or ellipse type
Motor Power 2×1.5/1.72KW 2×1.5KW 2×1.5/1.72KW 2×1.3/1.72KW
Shake Strength ≤7.0G
Amplitude 5~6mm
Thruput Per Screen 100/130 m3/h 440/572GPM 120 m3/h 528GPM 110/130 m3/h 440/572GPM 80/130 m3/h 352/528GPM
Angle Of Screen -1°~5°
Motor frequency and voltage 380V/50HZ(Foreign custom motor according to customer requirements)
Screen Area 2/2.73 m2 2.36m2 2.2/2.94m2 1.8/2.7m2
Screen Specification 585×1165mm (40~250) 630×1250mm (40~250) 700×1050mm (40~250) 830×1080mm (40~250)

Tangshan Dachuan Mechanical Equipment Co., Ltd. is a company focuses on the production, sales and after-sales maintenance service of solid control equipment of mud cleaning equipment. We are concentrated on matching the requirements of our customers. Our management principle is to supply a high quality, rapid, honest, considerate service to our customers. DC shale have a lot of advantages. Such as;

1 The motor of the shale shaker use the vibration motor of import in Italy, the excite of vibration motor can adjust.

2 The screening area of the screen is big, the throughput is large, the effect of the treatment is good.

3 the shale shaker designed with the solidwordks ansys, the structure is optimization, the structure of the shale shaker is simple, compact, the performance is excellent and cost-effective

4 the screen of the shale shaker is the agglutinate screen edge rigidity, use the plate type close fixed, is convenient and quick to replace.

5 the design is reasonable, make the mud buffer, average flow, reduce the directly impact, the life of the screen is long.

6 The shale shaker use the ratchet wheel lift, the structure of lift is easy and easy to operate.

Hydrocyclone Desander is a water treating equipment which use the centrifugal force settle and realize the separation of the solid and liquid, it is mainly removed the ground water and other source water solid particles. It is apply to the system of the water source heat pump, It is widely used in the chemical industry, environmental protection, food, medicine and other industry.

The working principle of the Hydrocyclone

The Hydrocyclone Desander is according to the screening theory of the solid particles rotate in the fluid, after the fluid flow into the equipment from the water inlet of the Deserter, produce the strong rotary motion, because the density of the water and sand is different, under the common action of the centrifugal force, Centripetal buoyancy and the fluid flag reach the purpose of the degritting, the rate of the degritting is high, save the installation time, the work state is stably.

The selection of the Hydrocyclone must consider factors of the water throughput, the working pressure of the pipelines, the quality of the water source and the requirements of the water quality. Usually, on the condition of the meet flow, we should select and use the equipment with the big model and recommend use a several equipments parallel alternative the big equipment, in order to obtain the  better solid-liquid separation effect.CNQ Desilter Parameters

Model No. CNQ100 CNQ125
Thruput ≤360m3/h(1584GPM)
Screen Area 1.0m2 ~2.4 m2
Size Of Swirler 4″ 5″
Qty Of Swirler 2-18
Pressure 0.15~0.35Mpa
Centrifuge Pump 11kw~75kw
Drift Diameter Of Inlet Pipe 75-150mm
Drift Diameter Of Outlet Pipe 125-200mm
Particle Size 44~15μm

Characteristics

1 The structure is simple, it is easy to operate, the use is safe and reliable.

2 Comopared with the expend tubes, buffer box and the Desander equipment, the size of the DC Desander is small, the throughput is big, save the field space.

3 It can remove the sand in the process of the uninterrupted supply

4 Avoid the phenomenon of the secondary pollution, the cleaning sand efficiency is high.

The importance of the screen

The combination property of the drilling fluid shale shaker reflect the sieve size is fine, using life is long and the throughput is big, this conditions are related to the structure and performance of the screen. The screen is a important part of screening task, it is the consumables in drilling fluid, the size of the hole determines the size of the solid phase particles are removed by the shale shaker. Because drilling fluid have corrosive, abrasive resistance and the high temperature,

In order to remove the smaller particles in drilling fluid, the material of the screen is the stainless steel wires of the heat treatment, the material of the ancillary shoring structure is steel plate, galvanized sheet, plastic board and ect.

The specification of the screen

The specification of the screen determines the sieve size, the sieve size is the size of the sieve pore which the particles can pass. Because the oilfield and the related industries learn from the foreign stander, so use the mesh representative the size of the sieve pores, it is said that the number of the sieve pores in one inch width.

For different drilling mud equipments manufacturer will hold their own model shale shakers. Different type shale shaker will hold different features and superiority.

To develop both precise and accurate process control, DC conducted a battery of tests. These tests included; cure tests by varying time and temperature; bonding strength tests by testing the tensile strength of the cure screens through destructive testing; and chemical exposure tests by immersing a series of screens in chemicals characteristic of the oil & gas industry.

The liner motion shale shaker have the performance of the high screening precision, simple structure, less energy consumption, low cost, low noise, the using life of the screen is long, good sealing and convenient to maintain. The product is widely used chemical, food, plastic, medical, metallurgy, glass, fire-resistance, grain, fertilizer, ceramic ect. industry,

     

Shale shaker is the first phase cleaning equipment in a complete solids control system. Shale shaker is mainly used to remove the drilling cuttings return to the ground from wellhead, so as to meet the basic requirements of the next equipment in the oil drilling. 

Features of all  model DCS Linear Motion Shale Shakers

     *Explosion and Non-explosion proof electrical

*systems for 50 or 60 hz.

*Deck angle adjustable during operation from –2 ½ to +5 degrees.

*Pretensioned screens with wedge fastening (optional hook strap)

*High G-Force of 2 – 8.5 G provides dry solids discharge.

*Simple design without a gear box, hydraulics, pneumatics, oiling system or belts.

*Unique feeder assembly that presents fluid to the scalping screens as a uniform, low-           impact curtain. Feeder easily can be configured into a variety of connection points for installations with limited space.

*Customized Shaker Dimensions, including size of possum belly, weir height and   overall shaker width, length and height are available.

*Fluid distribution designed to utilize all available screen area, regardless of drilling conditions

*Available in common power supply configurations to meet all applicable global electrical standards

 

Shale Shaker Parameters

 

TYPE DCS585-3/4 DCS630-3 DCS700-3/4 DCS830-2/3
Shake Locus linear type or ellipse type
Motor Power 2×1.5/1.72KW 2×1.5KW 2×1.5/1.72KW 2×1.3/1.72KW
Shake Strength ≤7.0G
Amplitude 5~6mm
Thruput Per Screen 100/130 m3/h 440/572GPM 120 m3/h 528GPM 110/130 m3/h 440/572GPM 80/130 m3/h 352/528GPM
Angle Of Screen -1°~5°
Motor frequency and voltage 380V/50HZ(Foreign custom motor according to customer requirements)
Screen Area 2/2.73 m2 2.36m2 2.2/2.94m2 1.8/2.7m2
Screen Specification 585×1165mm (40~250) 630×1250mm (40~250) 700×1050mm (40~250) 830×1080mm (40~250)
Remarks The proportion of thruput per screen in the total amount is:1.2g/cm3,the viscosity is:45s


DCLW horizontal type helical-conveyer centrifugal is a mechine to separate the soild particles and liquid or separate the liquid and mixture mixed in the liquid by centrifugal force. The main function of centrifugal is to separate the liquid and solid particles in the suspension, or to separate the two kind of different liquid with different density which can not dissolve in each other in the emulsion. And also, can be used to remove the liquid from the mixture of liquid and solid. Some sedimentation centrifuge also can classificate the solid particles in the fluid with different density or granularity by identify the different sedimentation velocities.

 

The foundation of the centrifugal

There are two reason to use the centrifugal that in the process of maintenance the drilling fluid

1It can selective separation the colloid particles and superfine particles in the aggravated drilling fluid, in order to improve the flow property of the drilling fluid.

2 It can eliminate the small particles in the aggravated.

 The centrifugal can recover the large size aggravated solid phase which is more valuable. If don’t use the centrifugal, in order to reduce the density of superfine particles, we have to discard all the drilling fluid, even if the drilling fluid have a large of valuable aggravated solid phase.

We need to notice that the mud cleaner and centrifugal all can remove the drilling cuttings and recover most of the barites. But the two equipments removed the size particles are different. The mud cleaner can remove the big particles size of drilling fluid, but the centrifugal only can remove the small size of drilling fluid. Their foundation can complement each other, the density of the drilling fluid is bigger than 1.80cm3, it is better to use the two equipments,

The classify of the centrifugal;

the separation factor of low speed centrifugal is 500-700, the rotate speed is 1600-1800r/min, the separation factor of the medium speed centrifugal is 700-1200, the rotate speed is 1800-2200r/min. the separation factor of the high speed centrifugal is 1200-2100, the rotate speed is 2200-3000r/min

The treatment separation of the mud cleaner by the large of drilling cuttings from the well, so that, mud enter into the next separation equipment, the performance and using of mud cleaner are directly influence the next using effect of the separation equipment. The screen is according to the vibration theory of the liner motion ‘s movement locus to designed, the exciter make the screen box do back and forth movement, the solid particles in the mud is sifted out from the surface, to achieve the purpose of the solid and liquid separation.

The use and maintenance of the drilling fluid mud cleaner

1 The method of use

The correct install and use of the multifunction cyclone mud cleaner can rid of the harmful solid phase effectively in the drilling fluid, control the viscosity, recover the useful solid phase, it has important significance to extend the life time of the mud cleaner and reduce the labor intensity of the field workers.

(1)The multifunction cyclone is installed behind the shale shaker and above the one and two drilling fluid tanks.

(2) The drilling fluid which into the mud cleaner must processed by the shale shaker.

(3) Plugged, after the motor starting, the direction of rotation of the motor and the direction of the sign of belt cover must be consistent.

(4) Firstly, air transportation the rotating shale shaker, then check up it, if found has unusual noise, we should stop to overhaul.

(5) Tightenting the screen, pressuring the spiral, testing pressure the screen by hand, then test running 2-3min, the screen should not have separate oneself from the strip, then appropriate pressure the spirals, inspecting the each tensioning spring, the length should be basically same.

(6) In the process of the using screen, if we need to clean the cumulative sand on the screen, we can’t use spade to sweep the screen.

(7) we should wash the screen at least per shift, prevent the viscous things or sand on the screen are maybe blocked the mesh, influence the screen normal use.

(8)When stop to use it , we should closed sand pump firstly, keep the shale shaker rotating 3-5min and wash the screen in time to keep the screen clean, the closed the shale shaker.

(9)we should Infusing butter on the bearing of the exciter once a day at least.

(10)In the process of transportation or lifting, we can’t put the hard things on the screen or trample by foot.

(11)preventing the sundry enter into the swirler.

(12)we should often wash the discharge grove and the baseboard of the shale shaker.

(13)according the stratum and the property of drilling fluid to select the screen, if the viscosity is high and the sediment concentration is big, we should select the less mesh screen.

(14) The use method of the discharge pipes

the use of the cyclone tube; when the feed liquid pressure equal to the rated pressure, turn off the valve on the overflow tube, make the tubular value of the overflow pipe is 0.01-0.03mpa. When the feed pressure below the rated pressure, adjust the valve on the overflow , make the tubular value of the overflow pipe is .0.02-0.05mpa,

maintenance

usually, it operate 500h we should maintain it, the main part are rotating part, tensioning the firmware and replace part of lose efficacy components.

It operate 4000h, it need to overhaul, the main content is maintenance the cleaner all sided, replace the cone, check the insulation of the electrical machine , lubrication or tensioning all parts, at last we should paint the anticorrosion treatment.

 

When drilling the air layer, because the rocks are destroyed, the gap of the rock have a large of gas to immersion the drilling fluid reach the big crack or cave gas reservoir. It is maybe appear the large of gas of replacement immerse the drilling fluid.

1 Characteristics

(1)The density of the different of depth of the gas invasion is different .

(2)The density of the gas invasion drilling fluid will be very small when it is close to the ground, even if the drilling fluid gas invasion of the ground is very serious, the density is reduced, but the decrease of the pressure of the drilling fluid column is not very big, this time we can’t use the density of the ground gas invasion multiplied by the depth of the well to calculation the liquid column pressure.

(3)Because of long time to stop cycle (change the rig head, maintain the pump or electrical logging and so on), there is a large of gas column which is formed by nature gas under the well, when it rise to expansion, maybe led to the drilling fluid overflow.\

(4)After the drilling fluid gas invasion and closed, because the density difference, the nature gas will slip up, finally accumulate on the well month.

(5)In the case of the gas rise but it is not expansion , the pressure of the ground unequal to the pressure of the well month plus to the pressure of drilling fluid column, so we can’t use this pressure to calculate the required drilling fluid density.

2The damage of the gas invasion

(1)Reduce the density of the drilling fluid, after the drilling fluid density reduced, if the liquid column pressure is inferior to the ground pressure, it is maybe led to the well kick or blowout

(2)Make the absorption of the desander pump, priming pump and the drilling pump is bad, even can’t work normally, cause the device vibrate.

(3)Part of the toxic gas overflow from the drilling fluid, the operating personnel maybe poisoning.

(4)It can lead to fire.

(5)After the gas invasion, drilling fluid density will be increased, make the mechanical drilling rate decreased.

So how do we processing the gas invasion ?

The common methods of disposed the gas invasion

1 Circulation drilling fluid degassing method

It use the mechanical equipment continuously circulation drilling fluid on the ground, make the bubbles emersion the liquid level and overflow, the method only rid of the bid bubbles. The bubbles of diameter of less than 1mm, especially the bubbles of high viscosity, the foundation of cycle degassing is small. When use the methods to degassing, in order to reach the degassing effect, required long times, the drilling industrial is not allowed.

2 Chemical degassing method

Adding chemical gas degassing to the drilling fluid gas invasion, the method adopt to rid of the own bubbles. Use the chemical degassing method, need to mix and the time of reaction, so need long time, the high cost. The foundation is small to the gas of external invasion.

3mechanical degassing metood

Using all kinds of mechanical equipment, according the degasser clear the gas which immersing the drilling fluid. The methods apply to all kinds of the drilling fluid degassing. The mechanical degassing divided into ordinary pressure, vacuum type and the centrifugal.