Tag Archives: Solid Control Equipment

hydrocyclone device that removes large drill solids from the whole mud system. The desander should be located down steam  of the shale shakers and degassers, but before the desilters or mud cleaners.      

Design Principles:

DC desander is produced by an advanced design, careful engineering, quality materials and finest workmanship which comprising 8, 10, and 12 inches cone diameter. As desanders have varying capacity based on its diameter.

Operation Mechanism:

Desander include two 12-in.(305-mm) diameter polyurethane hydroclones slant mounted over the shaker. Each desander clone includes four replaceable wear resistant polyurethane sections that are joined together with quick release stainless steel clamps. The desander is furnished with an 8-in.(203-mm) diameter feed manifold and a 10-in (254-mm) diameter discharge manifold and a 0-60 psi (4.1-bar) pressure gauge. The desander also includes a solids discharge trough to distribute the hydroclone underflow evenly onto the screening surface.

Tangshan Dachuan Machinery has overcome the disadvantage of the original manufacuture technology, produced a new style hyrocyclonic desander based on the thoery of particle sedimentation.

The characteristics

1. Combined by the 10″ or 12″ swirler and pipes, the operation and maitenance is much easier.
2. Used the abrasion resistant special polyurethane which is corrosion resistant, anti-scouring and has a long life.
3. Put the materials into machine along the tangent line of the inlet hole, the transition is smooth and is in favor of increasing separation efficiency. The separation range is large.
4. The bottom flow hole of hydrocyclone discharges the sand particles as an umbrella and the wet discharging can make the particles be dischaged quickly to avoid the block of bottom flow hole.
5. The symmetrical inlet structure makes the allocation more reasonable and the work stable.
6. The bottom flow hole can be adjusted to control the handling capacity to match the different requirements.
7. According to the clients’ requirements of the handling capacity, the desander can be made up by several groups of hydrocyclone.

In the process of drilling, the drilling cuttings are produced in the bottom well are carried to the ground by drilling fluid, drilling fluid shale shaker is the fastest, biggest and earliest solid control equipment which remove the drilling cuttings, it is the necessary the first process equipment. The engineering level of shale shaker is mainly reaction in the ability of throughput, the reasonable of working, the length of using life, operation and maintenance.

The situation of size of drilling fluid particles, content viscosity and the performance are non changed, the dynamic shear is bigger of drilling fluid solid phase particles, the take off resistance of solid phase particles, the migration speed of solid phase is getting smaller. The theoretical research of foreign drilling fluid shale shaker is fully realize it, drilling fluid flow out from the drilling separator, before enter into the shale shaker screen, setting a drilling fluid impact tank, preventing the drilling fluid directly impact the screen, maximum decrease the shear stress which the drilling fluid return from the well month, not only the stress of solid phase and the motion are reasonable, but also decrease the status of drilling fluid runs and emits and increase the throughput of the drilling fluid, extend using life of the screen.

In recent years, the domestic shale shaker has a great improve, especially in theoretical reach, such as the movement locus of shale shaker and the using life of shale shaker have already reach or approach the word advanced level. But the research in domestic shale shakers don’t attention the importance function of drilling fluid impact tank in shale shaker,  when we choose drilling fluid shale shakers, we must choose the structure shale shakers

In addition, because the material, processing technic, working accuracy and the matching use of the common equipment are different, make the products actually reach the technology performance has a great distinguish. So we choose drilling fluid shale shakers, we must detail know the material, processing technic, working accuracy and the matching use of common equipment instead of the show technical index to choose.

Drilling fluid is made of dispersion medium, dispersion phase and additive.

Drilling fluid is mainly made of liquid phase, solid phase and chemical treating agent. Liquid phase can be water (fresh water, saline), oil (crude, diesel oil) or lactescence (mix oil emulsion and inverse emulsion). Solid phase is including useful solid phase (expansive soil, additivi material) and the useless solid phase( rock). Chemical treating agent is including inorganic, organic and polymer compound.

Water base drilling fluid is use the water as dispersion medium, it is a sol Suspension hybrid system. The major components are water, clay, additive and all kinds of chemical treating agent. There are five stages of the base water drilling fluid, the nature drilling fluid (1904-1921), fine dispersion drilling fluid (1921-1946), coarse dispersion drilling fluid (1946-1937), don’t spread low solid phase drilling fluid (1966 until now).

The base water drilling fluid is divided into;

a The fresh water drilling fluid. The content of sodium chloride is less than 10mg/cm&sup3, the content of calcium ion is less than 0.12mg/cm³。

b The saline drilling fluid ( seawater and salt water drilling fluid included). The content of sodium chloride is higher than 0.12mg/cm³.

c The saturated salt water drilling fluid. It is saturated solution with a kind or various soluble salt.

d The calcium treatment drilling fluid. The content of calcium ion is less than 0.12mg/cm³

e The hybrid emulsion drilling fluid, it has the water base drilling fluid with 3%-40% emulsified oil.

     f The don’t disperse and low solid phase polymer drilling fluid, the contend of solid phase is less than 4%, it has the moderate polymer

     g The potassium base drilling fluid, the content of the potassium chloride is higher than 3%, from 1978, it was used in our country oil field.

    h The polymer drilling fluid. The polymer as the main body, the ingredients is viscosity reducer, filtrate reducer, prevent collapse agent,

lubricant and all kinds of chemical treating agent. It is a new drilling fluid system developed in the 1980s.

 

The drilling mud centrifuge is used for the recovery of barytes, cleaning the fine solid phases, decreasing the volume of solid phases in the drilling mud and guaranteeing the        performance of drilling mud。DCLW series is a normal decanting centrifuge mode of our company, they are ideal choices for separating particles in drilling mud. Decanting Centrifuge separate the suspending fluids using the principle of centrifugal action, the suspending fluids are pushed into the rotor drum through the inlet pipe and the fluid hole of the spiral feeder.

Feature of DC decanting centrifugal

a User friendly advanced control technology

b Screen and Solid bowl configurations

c Bowls range from 150mm – 1400mm Diameter

d Sealed and pressure-tight construction

e The screw propeller and solids discharge made from stainless steel Stainless Steel protected by  tungsten carbide alloy.

f Screw propeller & Solids Discharge Stainless Steel protected by  tungsten carbide alloy.

g Southwest Petroleum University Technology Support 

The DCLW decanter Centrifuges boast infinite speed adjustability of main bowl drive and backdrive (differential). Utilizing variable frequency drives on all motors allows low amperage start-ups and eliminates troublesome sheave changes. Stainless steel wetted parts, tungsten carbide hard facing on bowl and scroll, as well as superior gearbox construction.

DC uses high quality stainless steel on all surfaces that the processed material comes in contact with.

The mud agitator is widely used in the ground tank of the drilling fluid. The mechanical mud agitator is made of the drive motor, gear reducer, transmission box output shaft and impeller ect.The appropriate mud agitator can keep all the solid phase particles uniform, if  the shearing action is proper, the performance of the drilling fluid system is all the same and can save power.

  

The principle of operation

The impeller can stengthen the stirring effect by making vortex of the drilling fluid. The tray installed between the leaf blades can prevent the deposition of the solid particles when the machine stopped, thereby, to reduce the moment of resistance inflicted by the sediment to the impellers when restart the equipment, therefore, to avoid burnout of the machine.

The structure of the mud agitator

The transmission mechanism

The transmission mechanism are mainly made of motor, reducer device, coupling and the mixer shaft, there are a few drilling fluid mud agitators in the solid control equipment. The rotating mechanism of the turbine and the worm is simple, the strong reliability, it is the most popular in the drilling fluid, now the foreign all use the worm and gear to rotate directly.

Impellers

The impeller is the part of rotation, the structure of the impeller determines the function of the impeller, the sharps of the different liquid storage tanks are different, we select the different impellers according to the experiences and customs. The reasonable method is according to the mixing purpose and the formation of flow state to select .

The mixer shaft

The mixer shaft is the structure of lifting, in the process of the drilling fluid, the agitator can’t stop. There are some causes in the practical work, so usually it can’t reach the
Requirement. After the agitator stoped, because the tank has desilting, the serous tables are buried in the desilting, it is very difficult to start. The blades are often breaked and the motor is often burning loss.

DC Solids Control as a professional manufacturer for soilds control equipments, we have designed lots of high-quality products, and JBQ series Agitator is one of them. To keep both the mud uniformity and the suspension of solids, the mud agitator is used to agitate the mud consecutively and reliably.This agitator agitates the mud to make cuttings, silt and sand pass the solids control system without being precipitated onto the tank bottom. Due to the simplex turbine decelerator, this product is featured by compact construction, light weight, balanced transmission, low noise, high efficiency of transmission and strong agitating power. Therefore, it is a reliable product in the solids control system.

 

ZCQ vacuum degasser is a special equipment to deal with gas drilling fluid, which is applied to the mating of the other drilling equipment to eliminate the harmful gas of the fluid, to recover the specific gravity and stabilize the viscosity of the fluid.  ZCQ series Vacuum Degasser is a special-purpose device and a new type one for the treatment of gas in the drilling fluids. Also, at the same time vacuum degasser can be used as a heavy-power agitator and supported applicable to all types of mud circulation purification system。

The function

The ZCQ Series Vacuum Degasser can quickly remove all kinds of entrained gas from the fluids. It is an indispensable equipment in gas wells, prospect wells and deep wells. It is also used with various kinds of clean circulating systems for drilling. The gas-fluids separation structure of the HV Series degasser is well designed, ensures efficient separation and proper filtering. A water ring vacuum style degasser is used for degassing combustible gas and explosive gas. Do contact us for further sales enquiries.

The ZCQ vacuum degasser has performed reliably on hundreds of thousands of wells and has earned its reputation as the standard of the industry, Vacuum degasser is one important part but not a phase of solids control, it is used to separate the gas and drilling fluids for safe and environment friendly. It is always installed after the shale shaker, and before the desander and desilter

Features & Benefits

       ·Skid-Mounted – Simplifies spotting and installation.

       ·Self-Contained – The unit consists of a cylindrical vacuum tank with internal baffle system, vacuum      pump, jet nozzle and three-way float valve.

       ·Three-Way Float Valve – Unique design allows venting to the flare line during hydrogen sulfide service.

       ·High Performance – The D-GASSER can handle up to 1,000 gpm while restoring mud to its original  density.

       ·Robust - The unit is ruggedly built and is coated inside and out with a corrosion-resistant epoxy to ensure long life and minimum maintenance.

 DC solid control is a professional manufacturer of solid control system/equipment in china. We will provide our clients high quality products with most reasonable price, at the same time we also sincerely offer the high level after sales service for any home or abroad clients.

You are welcomed to consult or visit us any time.

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.