What is Sand Control?

By Oilfield glossary, sand control is one of the process of well completions. “The installation of equipment or application of techniques to prevent migration of reservoir sand into the wellbore or near-wellbore area. In weak formations, sand control may be necessary to maintain the structure of the reservoir around the wellbore. In other formation types, the migration of sand and fines into the near wellbore area may severely restrict production. Each of these conditions requires different treatments. The principal sand-control techniques include gravel packing and sand consolidation.”

sand control

Sand control focusing on gravel packing, the most popular choice.

What is Gravel packing?

Gravel packing involves the complete placement of selected gravel across the production interval to prevent the production of formation fines or sand. Any gap or interruption in the pack coverage will enable undesirable sand or fines to enter the producing system.

It includes the following components:

1 production tubing

2 production casing

3 Gravel-pack packer

4 Gravel placed in casing and perforations

5 Gravel pack screen

6 Sump packer

Sand control V.S. Solids control

Sand control has always played an important role in oil production, but solids control plays an important role in oil well drilling. They are utilized in different area.

Solids control is a technique used for well drilling to provide prepared drilling fluids for drilling rigs. Drilling fluid maintenance cost, clean up, and disposal cost as well as the overall cost of boring can be reduced dramatically when proper solids control techniques are utilized.

solids control equipments

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GN solids control attends Brazil Offshore 2011 in Macae last week from 14^th to 17^th, June, 2011. We got success during the show, we met some valuable clients, we show the world of GN brand and learn from other companies.

GN solids control in Brazil Offshore

 We met some clients and talking about proposal of drilling waste management system, decanter centrifuge, onshore and offshore drilling fluids treatment system, also we contact with big petroleum companies,drilling companies, oilfield service companies, also solids control equipments manufacturers in the world, such as Petrobras, BAKER HUGHES,TSC OFFSHORE, CPTDC, OIL STATES,NOV, Derrick, GE OIL&GAS,ETC.They are very interested in the products and service provided by GN, and hope to have further cooperation after the show.

 During Brazil Offshore 2011, we showed our main products including linear motion shale shaker, Balanced elliptical motion shale shaker, decanter centrifuge, centrifugal pump, desander, desilter, mud cleaner, vacuum degasser, mud gas separator, shaker screens and oilfield drilling rig solids control system & HDD mud system.

 If you are interested in GN solids control equipments and would like to meet us in the oil show, we could have a meeting in the following show.

1 For clients in South America, we can meet in AOG(Argentina) which is held on 10~13 October,2011.

2 For clients in Russia, we can meet in 11th Moscow International exhibition “Oil and Gas” held on 21th~24^th, June, 2011.

3 For clients worldwide, we can meet in OTC2012 held in TX, USA.

For detailed exhibition information and GN booth, we will public in GN website timely.

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GN new designed GNZS63-4 shale shaker is mainly used for drilling fluids separation for oilfiled drilling.

GNZS63-4 shale shaker

What consist of GNZS63-4 shale shaker?

Deck adjustment, vibration motor, shaker deck, base frame, support, baffle box, explosion proof starter, shaker screen, wedge plate, torsional spring ,etc.

Feature of GNZS63-4 shale shaker

(1). Adopt two sets same vibration motor take advantage of double motor in-phase principle, shaker deck makes linear motion vibration at 45°sling angle, some spare parts are interchangeable with other brand shale shaker

(2). Adopts high quality reliable vibration motor provides long time operation without any problem.

(3). Shaker screen can be flat type or pyramid one. According to drilling mud property the screen can be 10~200mesh

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

(5) 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

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

Specs of GNZS63-4 shale shaker

1 Vibrating motor: 2 x1.94KW

2 Screen Area: 3.15㎡(33.9 sq ft)

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Generally speaking, decanter centrifuge plays a role in separating solids from liquids. Alfa Laval decanter centrifuge is one of the best sold centrifuges in the world, especially in South America. The other brands in South America market including Derrick, MI-Swaco, NOV, Derrick, GN, etc. GN solids control is new brand player in the market, but fast developing.

decanter centrifuge to Ecuador

How a decanter centrifuge works

A decanter centrifuge separates solids from one or two liquid phases in one single continuous process. This is done using centrifugal forces that can be well beyond 3000 times greater than gravity.

When subject to such forces, the denser solid particles are pressed outwards against the rotating bowl wall, while the less dense liquid phase forms a concentric inner layer. Different dam plates are used to vary the depth of the liquid – the so-called pond – as required.

The sediment formed by the solid particles is continuously removed by the screw conveyor, which rotates at a different speed than the bowl. As a result, the solids are gradually “ploughed” out of the pond and up the conical “beach”.

The centrifugal force compacts the solids and expels the surplus liquid. The dried solids then discharge from the bowl. The clarified liquid phase or phases overflow the dam plates situated at the opposite end of the bowl. Baffles within the centrifuge casing direct the separated phases into the correct flow path and prevent any risk of cross-contamination. The speed of the screw conveyor may be automatically adjusted by use of the variable frequency drive (VFD) in order to adjust to variation in the solids load.

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GN solids control have VFD decanter centrifuge for sale. Welcome to inquiry us for drilling fluids decanter centrifuge GLW-V-355x1250N .

decanter centrifuge for sale

GN decanter centrifuge mainly used for drilling fluids processing, barite recovery, drilling waste treatment, mud weighted, etc projects. We also produce related equipments fitted for the centrifuge, to be assembly as a complete drilling mud processing system, including mud tank, mud agitator, mud mixer, shale shaker, etc.

Safety Device of GLW-V-355x1250N decanter centrifuge

1. Anti-overload

The device protects the Compensating gear from torque overload, which is installed in the outside end of the Compensating gear. The torque of gear is limited with a spring clutch by which power can be imputed. While overload cuts off spring clutch with driving shaft, the face of spring move the gland down to outside for 6mm and the stroke faucet switch on to switch off the power of main motor and fluid supply pump.

1. Electric interlock device (only dual motor driving system)



In the dual motor driving system without inverter speed-adjustable device, the correct program for starting a centrifuge is:

1)        Firstly start the auxiliary motor.

2)        After thirty second, the main motor allows to be started.

The correct program for stopping a centrifuge is as follow:

1)        Firstly stop the main motor.

2)        After ten minutes, the electric interlock device will automatically switch the power of the auxiliary motor.

With the electric interlock device, the correct program can be automatically carried out and unexpected result from wrong operation can be avoided.

GLW-V-355x1250N Advantages:

1. width rotary speed to satisfy technical requirement;
2. Smooth and silence when start;
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Welcome to contact GN solids control if you are interested to apply for our distributors in Venezuela. GN solids control is a young but fast developing company and we are solids control specialist in China. We have exported many sets of drilling mud cleaning and recycling system to South American regions, for example, Brazil, Colombia, Venezuela, Argentina, Ecuador, etc.

solids control system in Venezuela

Perhaps the most important thing to know about Venezuela is that it is an oil exporting country, the fifth largest in the world, with the largest reserves of conventional oil (light and heavy crude) in the western hemisphere and the largest reserves of non-conventional oil (extra-heavy crude) in the world.

GN manufacture complete line solids control equipments for the drilling rig( shale shaker, desander, desilter, mud cleaner, vacuum degasser, decanting centrifuge, mud pump, poor boy degasser, mud gun, mud agitator, mud mixer,mud tank), and we can provide a complete solution on drilling waste management( high G dryer, decanter centrifuge, screw pump, vertical cutting dryer, mud tank, etc). As government policy is more and more strict on environment related on drilling, our equipments are more and more important recently.

All of the foregoing sets the stage for showing just how extremely important the country’s conflict over oil is. At the most overt level, the conflict between the Chávez government and the oil industry is one about who controls PDVSA. Beyond that, the specific issues that control is being fought over have to do with the company’s efficiency, its internationalization program, its outsourcing and subcontracting practices, OPEC membership, and special oil contracts.

PDVSA, State owned company in Venezuela

PDVSA has a production capacity, including the strategic associations and operating agreements, of 4 million barrels per day (600,000 m³). Officials say production is around 3.3 million barrels per day (520,000 m³/d) although most secondary sources such as OPEC and the EIA put Venezuela’s output at least 500,000 barrels per day (79,000 m³/d) lower.

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GN solids control exported several sets of drilling mud system to Amazon region, including Ecuador. We can produce the complete drilling mud separation system, including shale shaker, vacuum degasser, desander, desilter, decanter centrifuge, vertical cutting dryer, mud tank, etc.

 Ecuador produces more oil than it needs for domestic consumption and thus it is one of the country’s leading exports. Therefore, any new drilling for oil is not intended to meet local demand but is intended for export overseas, most likely to Japan and the United States.

drilling mud separation system

Drilling mud is used to control subsurface pressures, lubricate the drill bit, stabilize the well bore, and carry the cuttings to the surface, among other functions. Mud is pumped from the surface through the hollow drill string, exits through nozzles in the drill bit, and returns to the surface through the annular space between the drill string and the walls of the hole.

Drilling mud separation system

As the drill bit grinds rocks into drill cuttings, these cuttings become entrained in the mud flow and are carried to the surface. In order to return the mud to the recirculating mud system and to make the solids easier to handle, the solids must be separated from the mud. The first step in separating the cuttings from the mud involves circulating the mixture of mud and cuttings over shale shakers.

The liquid mud passes through the screens and is recirculated back to the mud tanks from which mud is withdrawn for pumping downhole.

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GN provides air-operated double-diaphragm pumps and accessories. Now we have inquiry for Air compressor driving the diaphragm pump. Welcome air compressor manufacturer to contact us for cooperation.

What is Air Diaphram pump?

diaphram pump

An Air Diaphram pump is a positive displacement pump that uses a combination of the reciprocating action of a rubber, thermoplastic or teflon diaphragm and suitable non-return check valves to pump a fluid. Sometimes this type of pump is also called a membrane pump.

Air Diaphram pump features:

• have good suction lift characteristics, some are low pressure pumps with low flow rates; others are capable of higher flows rates, dependent on the effective working diameter of the diaphragm and its stroke length. They can handle sludges and slurries with a relatively high amount of grit and solid content.
• suitable for discharge pressure up to 1,200 bar
• have good dry running characteristics.
• are low-shear pumps.
• can be used to make artificial hearts.
• are used to make air pumps for the filters on small fish tanks.
• can be up to 97% efficient.
• have good self priming capabilities.
• can handle highly viscous liquids.
• are available for industrial, chemical and hygienic applications
• cause a pulsating flow that may cause water hammer

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GN solids control provides solids control system for 1500m drilling rig, also for 2000m, 3000m, 4000m, 5000m, 7000m drilling rigs. Last month we shipped 1 set of 4000m drilling rig solids control equipments to Turkey.

drilling rig mud cleaner

Now we have already Exclusive agent in Turkey, we produce mud tanks there and ship the solids control equipments from GN factory, and assembly them in Turkey. It will save considerable transportation cost of mud tank and fast the delivery time a lot. The clients in Turkey and Turkey neighborhood, such as Iran, Syria, Dubai, Egypt, Iraq, etc. countries, will benefit from this convenience.

1500m drilling rigs are used to explore middle deep oil and coal-bed methane. They have characteristics of simple structure and easy operation. There are four types of this rig: ZJ15,ZJ15DJ ,ZJ15DZ,ZJ15DB.

The1500m drilling rig has a parallelogram substructure and a telescoping mast. The mast is raised by cylinders and expanded or contracted with wireline, 1 500kW AC frequency converting motor is used to drive the drum shaft of the drawworks through the counter shaft and the roller chain. The drawworks has two gear shifts—high speed and low speed. The gear shifting is made by using the push-disc type clutch. The main brake is the hydraulic disc brake. The rotary table is connected to the drawworks with the chain and driven by the drawworks. The closed chain compound case uses the fully forced splash lubrication. The auxiliary brake is FDWS-15 air-cooling electromagnetic eddy current brake.

Petson is a local company in Turkey who can provides the complete solution for drilling rig package, including drilling rig (mobile rig), mud pump, solids control system, well control equipments, generators, etc. They have a big yard and capability to assembly the complete drilling rig package and ship to drilling site, especially in middle east. They have rich experience in oilfield drilling industry and during these years, they get good reputation and always keep good relationship with many drilling service companies.

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GN 2-WAY Flow Divider is designed to maximize the solids removal capabilities of shale shaker. It is mainly used for GNZS703 tandem shale shaker, GNZS852 triple shale shaker.

 Function of flow divider for LMSS

flow divider

• Ensures even distribution of liquid and solids to downstream shakers
• Eliminates need for back tanks and shaker bypasses
• Minimizes the effect of pitch and heave

Solids removal efficiencies are dramatically increased by the Flow divider, which distributes fluids/solids equally to multiple downstream shale shakers. Positive sealing weir gates are removable, allowing flow per selected shaker or installed omitting flow. The Flow divider eliminates the need for back tanks and shaker bypasses and minimizes the effect of pitch and heave. The unit is available in four sizes: 2,3, 4, 5, and 6 way.

How do Derrick Flow divider Work?

Mud from the flow line enters the rear of the Flow divider (1) where it contacts a baffle (2) allowing the flow to pass under and sometimes over before it flows over the weirs (3), and divides the liquid and solids equally between the desired number of shaker feed ports (4). Positive-sealing weir gates permit flow to the downstream shakers .

GN Flo-divider advantages

1 Eliminates the need for a back tank and shaker by-pass

2 Minimize the effect of pitch and heave

3 Reduce overall space requirement

4 Fit easily onto most rigs

5  It is applicable for all GN shakers

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