Tag Archives: desilter

How to select proper model desander / desilter ?

Desander and desilter are the second phase separation and third phase separation in oil drilling solids control system. There are different type desander and desilter for option, we may firstly to know the difference and advantages of each type, then we can know how to make choice for project.

First type: Desander/Desilter without downstream drying shale shaker

1) Small footprint, economic choice, no consumable screens

2) For oil gas drilling un-weighted drilling mud

3) Only for wet cuttings, not recommended for weighted mud and drying solids

Second type: Desander/Desilter with Mini 2panel Shale Shaker

1) Small footprint, economic choice, acceptable drying solids

Third type: Desander/Desilter with 3panel Shale Shaker

1) Big capacity, drying solids

desander

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Mud Cleaning system for oil drilling project

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GN Solids Control can produce all of the solids control equipment, eg. Shale shaker, desander, desilter, mud cleaner, centrifuge, agitator, etc. GN four phase solids control mud system is working in over 60 countries and areas with good working performance and reliable lifetime.

GN Solids Control four stage mud recycling system including below parts.

Part 1: shale shaker working on mud tanks, as the first phase mud separation equipment. We have different type shale shaker for option. Including

a. 2 deck panel shaker which is professional for diamond drilling, or other simple construction project.
b. 3 deck panel shaker which can be used for workover rig and other project.
c. 4 deck panel shaker which is most popular for oil drilling circulation mud system and this can also used for drilling waste management.

Part 2: Desander working after shale shaker to give further treatment, as the second phase mud cleaning equipment. We also have different type desanders for option.

a. desander without deck shaker, cheaper price.
b. desander with deck shaker, reasonable price with better performance

Part 3: desilter working after desander to give further treatment, as the third phase mud cleaning equipment. We also have different type desitler for option.

a. desilter without deck shaker, cheaper price
b. desilter with deck shaker, reasonable price and better performance.
Remark: we can also offer mud cleaner which is combination of desander & desilter. Smaller footprint, but better performance.

Part 4: Decanter centrifuge after desilter to give further treatment, as the fourth phase mud cleaning equipment. We have different type centrifuge for options.

a. GNLW223 baby mini centrifuge for diamond drilling
b. GNLW363 centrifuge which is most popular model for solids control / drilling waste management, GNLW363 is replacement for Derrick DE1000 centrifuge, etc.
c. GNLW453 and GNLW553 is GN big bowl big volume centrifuge for special requirements
d. GNLW452 centrifuge is middle speed centrifuge which is professional for barite recovery for oil drilling.

Any requirements, pls contact us freely

Desander and Desilter for Drilling Mud System

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GN Solids is professional manufacturer for complete sets of drilling mud separation and recycling equipment. The conventional equipment like shale shaker, mud cleaner, desander, desilter, vacuum degasser, decanter centrifuge, mud agitator, mud gun, centrifugal pump, screw pump, etc. Here, let’s learn more about desander and desilter.

1. The general installation type and function of desander and desilter

Desander and desilter are solids control equipment with a set of hydrocyclones that separate sand and silt from the drilling mud used on drilling rigs.

They can be installed separately: Desander is installed on top of the mud tank following shale shaker and vacuum degasser, but before the desilter. Desilter is installed on top of the mud tank following Desander. They also can be installed completely: in this case, they are installed on one deck shaker and called mud cleaner or mud conditioner.

Desander removes the abrasive solids from drilling mud which cannot be removed by shale shakers. Normally the solids diameter for desander to be separated would be 45~74μm, and 15~44μm for desilter

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Dredging and Dewatering equipments

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Not only for drilling application( oil & gas drilling, HDD, geothermal, CBM, water well drilling), GN equipments can be also used for mining slurry separation, dredging slurry management, piling and tunneling.

Dredging and Dewatering equipments

GN dredging and dewatering equipments are designed to feed slurry directly from the dredge. GN dredging slurry separation system separates solids from dredging slurry through a three phase system.

In addition, the solids that are removed are dewatered to a stackable “press filter” state, which can be readily moved with front end loader, conveyor and/or dump trucks. The effluent is pumped off by a centrifugal pump.

The separation process is continuous and operates completely mechanically without any chemical enhancement. The dredging slurry separation system is designed as a three phase separation system, 1^st separation is shale shaker, 2^nd separation is desander, 3^rd separation is desilter. Sometimes as the client’s requirement, we only design 2 phase shale shaker and desander. The desander and desilter are made into separate mud cleaner with large screen area.

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Shale Shaker for Solids Control

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Drill solids are the main contaminant of all drilling fluids and therefore their control is of the utmost importance. There are 3 main ways of controlling solids:

• Dilution

• Mechanical removal

• Gravity Settling

shale shaker for solids control

I ever saw in the water well drilling site in Mongolia that they do not use any solids control equipments but only dig several mud pits, by this way, it is very low efficiency and Environmental Pollution.

Solids control system is a way for mechanical removal the drill solids. Mainly it includes screen devices & Centrifugal Separation Devices. Screen devices is the most important equipment called shale shaker. In the future of solids control system, shale shaker will become the only solids control equipment which will be used instead of desander, desilter, mud cleaner, decanter centrifuge by improvement of its design. At present, linear motion shale shaker is the most popular vibration mode shale shaker.

But the arrangement of vibration motor various by different shale shaker manufacturer. Sometimes it is vertical installed, sometimes it is horizontal installed, it doesnot mean that horizontal installed shale shaker must be balanced elliptical motion shale shaker, it might be linear motion shaker.

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Mud system for a Rig

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As a part of rig package, mud system is a separate but an essential part, the handling of drilling fluids can save huge cost of drilling. In the early oil industry open earthen pits were used as settling area to separate solids and mud thereby acting as a solids control equipment.

mud system for a rig

Now, with the stringent environmental regulations and high mud costs, the economics of an effective mud system come into consideration. Different solids control companies introduce zero-discharge systems, closed-loop systems, “quick move” technology, screening technology, disposal options etc. No reserve-mud pit is used in a truly closed mud system. Mud is continually processed primarily by mechanical means, such as screening, hydrocyclone and centrifuging to remove solids initially. A second stage to remove colloidal solids is by wastewater cleanup techniques.

Major components of a mud system, including:

Mud gas separator, flare ignition device

Shale shaker, mud cleaner(or desander, desilter), vacuum degasser, decanter centrifuge , centrifugal pump, mud hopper, mud agitator, mud gun, mud tank and others, such as cutting dryer, screw auger, mud cooling unit,etc.

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Shale Shaker for Sale

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GNZS703 shale shaker produced by GN solids control has been widely used in oil & gas drilling. GNZS853 shale shaker is normally used for drilling cuttings treatment.

Below is the photo taken in South America oilfield drilling site. They use GN shale shaker to separate the large solids from the drilling fluids and get clean mud for reuse. Also they user GN shale shaker as a underflow shaker to help the performance of desander cone & desilter cone.

shale shaker for sale

To know how to operate GN shale shaker is much more important, also the maintenance. Only if you operate and maintain it according to the manual, you will use it same with some famous brand shale shakers.

1 Angle adjustment

The angle can be adjusted both under running and off condition.When delivered ,the deck is horizontal(0°) 。While operating with the same shaker screen, according to the worksite mud property, and feeding capacity ,by adjusting the deck angle in order to improve the treatment result .When the drilling mud run off, enlarge the deck angle to solve the problem. Angle adjustment range -1°~+5°，rated angle 0°~3°。

2 Pool configuration

A better pool configuration can maximize the screen area and such achieve better result. It is hard to set the deck angle at one time ,it needs the operation personnel adjusting several times according to the flow of the mud .The best pool configuration is when the mud covers the first and second shaker screen.

3 Screen tention

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Drill cuttings separation

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Drill cuttings are separated by shale shaker, decander, desiler, decanter centrifuge, and collected by screw conveyor or vacuum unit , for further separation of vertical cutting dryer & decanter centrifuge.

drill cuttings separation

In an ideal situation, all drill solids are removed from a drilling fluid by solids control equipment on a drilling operation. The two primary sources of solids are chemical additives and formation drill cuttings. Drill cuttings are contaminants that degrade the performance of the drilling fluid. If the drill cuttings are not separated, they will be ground into smaller and smaller particles that become more difficult to remove from the drilling fluid.

Most formation solids can be removed by mechanical means at the surface. Small particles are more difficult to remove and have a greater effect on drilling fluid properties than large particles. The particle size of drilled solids incorporated into drilling fluid can range from 1 to 250 microns (1 micron equals 1/25, 400 of an inch of 1/1000 of a millimetre).

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Mud cleaner Maintenance

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Simply speaking, mud cleaner is shale shaker, desander, desilter assy, it is also called 3 in 1. GNZJ703 & GNZJ853 is the best choice for large treating capacity, large screen area mud cleaner, most of our clients use GN made mud cleaner before GN decanter centrifuge, this action can improve the performance of GN decanting centrifuge.

mud cleaner

Mud cleaner maintenance including

1 vibration motor maintenance

(1)Clean dust on shell regularly

(2)Before operating, must check the bolts to confirm whether there is loose or not. Otherwise, we must screw bolts tight before running shaker

(3)Inspect the cable, whether there is wear, hold down, crushing, etc.

(4)the vibration motor should be under good lubrication during operation:

Motors before fixed on shaker, the bearing is filled with SKF specific lubricate grease, the temperature range is -40 ~ 200℃

2 shaker screen maintenance

(1)Before every shut off, the shaker should run without any load for 5-10 minutes, at the same time, use clean water to flush screen clean

(2)Every time finish operation, the shaker frame and screen should be flushed by water. Pls replace new screen or repair the damaged screen once it is found damage, otherwise large cutting may dropped into the clean mud and influence the following process.

3 Electric cabinet maintenance

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Drilling Engineering Solids Control

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Drilling engineering is a subset of petroleum engineering. Drilling engineers design and implement procedures to drill wells as safely and economically as possible.

solids control

Exploration and petroleum engineering are the oil and gas industry’s two main sections. Petroleum engineering is a field of engineering related to the production of crude oil or natural gas.

Drilling engineers are in charge of the process of planning and drilling the wells. Their responsibilities include:

Designing well programs to prevent blowouts
Designing casing strings and cementing plans, directional drilling plans, drilling fluids programs, and drill string and drill bit programs.
Specifying equipment, material and ratings and grades to be used in the drilling process.
Providing technical support and audit during the drilling process.
Performing cost estimates and analysis.
Developing contracts with vendors.

Solids Control is one of the most important phases of the drilling process. The primary reason for using mechanical solids control equipment is to remove detrimental drilled solids from the mud system. Mechanical separation of drilled solids is achieved via screen separation(shale shaker, mud cleaner, desander, desilter)　or accelerated g-force（decanter centrifuge）. Continue reading →