Offshore Technology Conference has been the top exhibition for oil and gas technologies. It has been held for 50 years. With the 50th anniversary of OTC, petroleum industry welcomes an important event.

With its continued effort, GN Solids Control put forwarded new and updated products including. At the exhibition, GN Solids presented the following products:

  • shale shakers
  • decanter centrifuges
  • vacuum pumps
  • centrifugal pumps

GN Solids Control also bring a series of effectively profitable products to the exhibition, including:

  • oil sludge treatment systems
  • automatic tank cleaning systems
  • vertical cutting dryers
  • shale shaker screens, for GN shale shakers and as replacement screens for shale shakers of other brands.

Years of painstaking effort in research and development has been improving the quality, performance, variety and profitability of equipment & systems by GN Solids Control. Some of the products by GN Solids Control with good profitability are:

Long time oil field development activities left many seriously polluted areas in a good number of countries. Nothing can grow on such land and will eventually lead to ecological disaster. This is especially true in the un-developed countries where legislation is weak, so is law enforcement.

However, with ever growth awareness of environment protection, more and more attention is given to the remediation of such pollutions. Oil sludge treatment system from GN Solids Control provides an effective solution to solve this difficult situation.

Such systems take oil sludge, send it to pre-mixer, then convey it to shale shaker by GN. Discharged solids will be delivered to final disposal process. Recovered fluid will be pumped to another mixer for combine with chemicals so that the fluid can be treated with decanter centrifuge. Separated solids will be sent to final disposal process again, which the recovered fluid will be taken over to a 3 phase disc separator, where it will be separated into oil, water and solids.

This process can complete remediate seriously polluted land and can make it arable, for us, and for future generations.

One important thing is that, GN Solids Control can provide all the equipment required by such system and therefore can provide a cost effective and reliable oil sludge system for customers.

  • Automatic tank cleaning system

There are countless mud tanks and all kind of other tanks being used worldwide. Cleaning such tank is a major challenge to all the owners of such tanks.

These kind of tanks are used to be cleaned manually, which is pretty tedious and impose a serious risk to the cleaning people because usually the inside of the tanks is refined space and has limited accessibility, there might be toxic gas inside the tanks as well, which can endanger the life of people. In addition, the floor of such tanks is usually pretty slippery, dim, making the cleaning work very dangerous and time consuming.

Automatic tank cleaning system by GN Solids Control effectively solves this problem.

In such system, there is a buffer tank which supply chemical solutions to the cleaning head through a water booster. The cleaning head is inside the tank to be cleaned, and rotates at preset scanning pattern, making the chemical spray to cover all the surface of the tank. Flushed down dirt will be sucked up by a hose connected to a suction pump, which transfer the slurry from the tank to a inclined plate clarifier, where solids is separated from chemical solutions and pumped out through a membrane pump to skip, while the clean chemical solution will overflow to buffer tank, to provide washing material to the cleaning head inside mud tank.

This system is efficient, it can clean one tank in one hour including time to deploy the system. if no relocation is necessary, it can clean on tank in half an hour. It requires at most 2 operators and therefore one man-hour to clean a tank.

If such tank is cleaned by people, it takes 24 to 36 man-hour. In other word, it is 24 to 36 time more efficient than manual cleaning.

Let us do a calculation.

Regular wage for field worker is $50. 36 man-hour is $1,800. With GN automatic tank cleaning system, labor cost is $50, plus electricity, may be another $50.

GN Automatic tank cleaning system provide a very cost effective solution to the labor and cost intensive tank cleaning job.

You can find more information including videos for the field application of the above systems at this link.

Separation of solids from liquid is routinely encountered in industry. There is numerous needs for such differentiation, from iron and steel complex, oil and gas exploration and production, to manufacturing of cooking oil, separation of solids from liquid is indispensable.

Traditionally such separation is done by static setting – mixture of liquid and solids are sent to a container, or a specially designed tank with mechanism inside the tank with the intention to speed up the setting process.

The advantage of such static setting is low cost, as the tank and the associated transferring equipment is all what is needed.

The disadvantage is its low efficiency, as the deposition process is described by Stock’s law. The smaller the difference between the specific gravity of the two phases, the longer time it takes. Sometimes it takes so long that such process makes no sense.

In order to solve this problem, many efforts have been made. The decanter centrifuge by GN Solids Control is a very efficient solution.

Working under the principle of centrifugal force, the decanter centrifuge by GN Solids Control rotates the material inside the spinning bowl at the speed of up to 4500RPM. Generated G force can be up to 3000G. In other word it is 3000 times more efficient than static setting process, if G force is used as the comparison criteria.

Under such separation force, solids is quickly thrown to the surface of the bowl and liquid is floated on top of the set solids. A specially designed decanter inside the rotating bowl, a specially shaped screw conveyor, will send set solids to one side of the bowl and discharge solids through Tungsten Carbide enforced opening. Separated liquid will be discharged from the other end of bowl called weir whose height is adjustable.

A unique features of GN decanter is how the bowl is built. It is centrifugally casted with 2304 stainless steel, which results in pretty evenly distributed density throughout the bowl. This is crucial to the normal operation of the decanter centrifuge because of the very high G force. For instance, 1 gram of out of balance weight can be as big as 3000 gram at the highest rotation speed. Centrifugal casting greatly reduced the potential of out of balance, though it is much more expensive to cast the bowl.

Last week there was a news. To many people there are so many big news that this business cooperation is really a routine, not deserving serious attention.

However this news does symbolize something, automation comes deeper into oil and gas industry.

Last week, Schlumberger, the biggest service company in the world, and Rockwell, a giant in automation technology, came into an agreement to make a joint venture, sensia, to combine advantages of both company and bring revolutionary solutions to the oil and gas industry.

This is the trend. The now joint venture want to release the huge potential of automation in oil and gas industry.

Automation has been widely used in many other industry sectors, such as iron and steel industry, for the control of complex machinery. Many advance technologies such as DCS and SCADA are a backbone of many highly complex process control. One good example is the control of steel pipe straighterner, which make steel pipe straight, round, with less hook end. This is a very advance control technique, which uses wavelet theory to control the accuracy of straightener wheels. This is the accuracy of half millimeter with tens of pressing force on straightener with response speed of micro seconds as the steel pipe is going through the machine at 1m/s speed.

In the oil and gas industry automation technology has been primarily focused on automated operation of remote oil and gas fields, monitoring long distance pipelines , and data collection. This is just the basic application of automation technology, they have no comparison with automation technologies used in other industry sectors such as iron and steel industry.

In solids control technology, there is not much application of automation. However GN Solids Control has been making effort to use automation technology in its products, such as decanter centrifuges. Now GN Solids Control is controlling is decanter centrifuges and monitor their operation parameters with HMI. GN Solids Control is also working on more advanced control technology, such as interlock logics to protect the centrifuges, smart control of differential speed for optimized separation of fed solutions, etc.

Application of automation in solids control equipment has tremendous potential to enhance equipment performance, explore new territories unthinkable ever before, and make great revolution come true.

One big potential of the marriage of automation with solids control equipment is smart shaker screen.

Shaker screens being used in solids control are all “passive” screens because they never play an active role in solids control. They do not know, and there is no way for them to know the condition of incoming fluids, its solids contents, and allowed operation parameters. They simply rock, and rock.

With smart shake screen, this situation will be changed completely one day.

Smart screen execute command from controller, which collect all the information throughout the drilling process, to determine the optimum operating parameters of smart shaker screens.

Smart screen is a power shaker screen.

Traditional shaker screens are mounted on shaker basket with two vibrators linked to the basket. The vibrators “rock” the basket to generate vibration,

Biggest disadvantage of such structure is its g-force. Usually G force generated is about 6-7, with very high quality and high strength basket being able to generate 8-8.5G force. There is not much room for G force to increase in such structure to increase, limited by the strength of steel frame.

However the G force of smart screen can generate unbelievable G force, up to 50G. This is 6 times the G force of best shale shaker.

And the G force is applied on the screen, not on the basket. There is no need for super-strong  steel for the basket.

The secret is the structure of the smart screen.

Underneath the smart screen there is an array of excitors, arranged in a pre-determined position. Each excitor will rock at electrical signal. There are tens of such excitors under the smart screen. With changing timing and strength of electrical signal, the intensity and frequency can be adjusted, to generate right G force for the coming sludge. For instance, G force will be gentle if solids concentration is low, or majority of solids in the sludge are fine particle. If solids concentration is high, or big particle are the majority of solids phase, G force needs to be bigger.

Obviously, two conditions are needed. One is the control of excitors. With complex algorithm, different G force and be generated, or even different G force are generated for different parts of the smart screen. The other is the sensing of particle break-down of incoming sludge. Without automation technology, all these stories will remain stories.

Smart screens sound attractive, yet it is very difficult to make them come true. You have to have a mathematical model, on which you get theoretical solutions to have resonance, and to what magnitude this resonance can be, and what parameters are to be adjusted to tune the intensity of G force.

After all these, a simulation model needs to be established to “run”, to verify the viability of the model, any deficiencies need to be addressed and corrected.

Then it comes to the prototype.

First you have to make the excitors identical. This is not supposed to be a manufacturing challenge as technology today make mass production of such excitors with high consistency possible.

Then the fabrication technology to make mounting the excitors reliably, and wiring them properly, for the very tough operation conditions they are going to face.

The next challenge is the bias effect of many factors resulting from manufacturing and fabrication process. Some of them many have big impact on the resonance of the excitors.

Smart screen appears to be a very promising products, it needs to go through a long way before it become mature.

GN Solids Control horizontal screw centrifuge is used for alumina dehydration treatment on site. The horizontal screw centrifuge has achieved good results through on-site processing. On-site customers have given positive evaluation and high recognition. GN Solids Control special centrifuge technology service The team assembled and commissioned the service on the spot. The professionalism and excellent technical support of our after-sales service personnel impressed the customers and achieved very good results in the dehydration treatment of alumina.

The concentration of alumina sludge before treatment in the on-site use of the horizontal screw centrifuge produced by GN Solids Control is between 8% and 10%. The on-site customer requires the sludge concentration after dewatering to reach 60% to 80%. Containing alumina (fine particle) water and sodium nitrate dissolved in water, Guanneng’s decanter centrifuge can meet the customer’s alumina sludge dewatering requirements. According to the customer’s processing requirements, we can choose different sizes of snail centrifuge. machine. The various types of horizontal screw centrifuges produced by GN Solids Control are mainly used for recovering barite, separating sewage, separating fine solids, reducing the solid content of materials, effectively controlling the density and viscosity of on-site drilling fluid, and ensuring customer drilling fluid. Performance. The straight section and the taper section of the horizontal screw centrifuge are made of 2304 bidirectional stainless steel and are cast by centrifugation. The rest of the drum assembly is made of SS304 stainless steel. The centrifuge auger is protected by wear-resistant alloy sheet for easy maintenance and replacement. . The centrifuge bearing adopts the original imported SKF bearing to improve the stability of the equipment and the service life of the bearing. The design team of Guanneng Centrifuge has accumulated a lot of practical experience in the field, and developed a batch of multi-purpose, which can adapt to various environments and different specifications. High-speed, medium-speed, low-speed and variable frequency centrifuge products have been well received by customers after being put on the market.

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Asian customers have ordered agitator and mud pump to prepare for delivery.GN Soilds Control has established good cooperation with Asian customers all the year round. The mixer and mud pump ordered by this Asian customer are urgently needed on site. The management staff of the management center stepped up the production in strict accordance with the actual needs of Asian customers, and successfully completed the processing test of the mixer and mud pump in the quality and quantity guaranteed by the customers in Asia. During this period, Asian customer supervisors visited the site to check the production process and work progress. After the customer saw it, they praised the professionalism of GN Soilds Control products and praised the professionalism of GN Soilds Control employees.

The agitator ordered by Asian customers adopts worm-worm reduction gear transmission. The shaft section is a circular-arc cylindrical worm. The turbine tooth shape is a circle conjugated with the turbine. It has the advantages of large transmission torque, stable operation and reliable operation. The agitator produced has a compact structure, a small floor space, a good stirring effect, a large stirring intensity, a wide spread range, and a reduced starting resistance distance.

Mud transfer pumps ordered by Asian customers mainly include sand pumps, vacuum pumps and screw pumps. The sand pump is designed for pumping drilling fluid or industrial suspension. Compared with ordinary pumps, it has excellent performance, large equipment flow, high temperature resistance on site, long service life, easy maintenance on site operators, high reliability and remarkable energy saving effect. Features. The vacuum pump transports more than 80% of the solid phase and high specific gravity materials at high speed. It is widely used in the transportation of waste mud from offshore platforms. The drill cuttings from the vibrating screen, the bottom of the sludge, the bilge cleaning of the ship, the sand, the fine sand. , and fracturing sand and other fields. Screw pump accessories are few, compatible structure, small size, easy maintenance, rotor and stator are the wearing parts of the pump, easy to replace. The screw pump stator is made of synthetic rubber and has special advantages over other pumps in transferring waste slurry of high viscosity and hard suspension.

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