Almost every well needs to remove the poor solid phase of cobalt well fluid. At about 1000m or 1300m, poor solid phase in drilling will lead to complex problems such as circulation loss, sticking or well control. Once these complex situations occur, the cost will far exceed the cost saved by using solid control equipment. The correct use of solid control equipment will greatly reduce the drilling cost. Although the solid phase in drilling fluid can be controlled by diluting cobalt well fluid to achieve the expected purpose, this method is not easy to operate and the cost is relatively high。
For example, the total amount of drilling fluid with a depth of 1000F and a borehole diameter of 12in contains 144bbl solid phase. If the solid phase content is reduced to 6%, the total amount of drilling fluid will increase to 2400bbl. Therefore, 144bbl of solid phase requires 2256bb1 of solid-free clean drilling fluid 14bbv (2256b1l + 144bl) = 6% (volume fraction). The cost of this kind of clean cobalt drilling fluid is unacceptable, and the drilling fluid circulating tank in most well pads can not hold so much drilling fluid, that is, 2256bb1 of solid-free clean drilling fluid is required for every 1000 drilling. (for dilution calculation, see Chapter 15) use vibrating screen to remove cobalt chips as much as possible. Although the vibrating screen is an important part of the solid control system, it is only part of a complete solid control system, not all. The three-level solid control system must be matched reasonably and operated carefully to ensure the best removal effect of all solid phases and minimize the drilling cost. 7.6.3
When designing the vibrating screen system with special factors, the influence of special factors such as flow rate, flow pattern, drill pipe volume, BHA, drilling rig power, applicable height and discharge dryness (resistance) must be considered. Most design methods use the evaluation parameters of the drilling fluid prepared in the laboratory to extrapolate the field application, but the drilling fluid prepared in the laboratory can not truly reflect the properties of the drilling fluid in the actual drilling. At high bottom hole temperature, the high shear rate produced by the bit nozzle makes the cobalt well fluid contain many colloidal particles, which will not be produced by the drilling fluid prepared on the surface.
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Published: 22 May 2022
OTC is short of offshore technology drilling. It is the most important show for drilling industry . Every year the people from different countries come to here to show their own new technology about drilling and also equipment. GN participated in OTC from 2015. Actually, OTC had broker off 2 years because the covid-19. And this year, the host hold this OTC again.
At this OTC show, GN meet lots old customer from all over the world ,especially client from Africa and middle east and also south America. Lots old friends shared their opinion about the drilling industry. The drilling market, petroleum market. All we are believe the market will go well as long as the oil price raising. For this time, GN take our shale shaker and solids vacuum pump to show. Many people are very familiar with GN shale shaker, it is our most featured equipment , GNZS594 F is our 4th generation model. According to client feedback, we upgrade our shaker for many times till it can reach most of customer client. Actually ,this shaker get good reputation from client. Every year we sold more than 300 units shaker to global. And the number is keep raising.
Except the shale shaker, we also showed solids vacuum pump 10B model. This pump is different with other type pump, which is used to transfer the material with high solids content such drill cutting or oil sludge. It is driven by air. The most suck distance is more than 50 meter and discharge distance can be more than 1000 meters. The pump attract lots customer at OTC, because the special structure and its particular application. Many client told they will try to use this pump to instead their old low efficiency method for oil sludge transfer. Especially for some crude oil tank cleaning, the sand on bottom.
GN can provide all series solids control equipment, if you have demand on these equipment ,welcome to contact us any time.
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Published: 13 May 2022
Mud agitator play a important role in oil drilling industry for the drilling mud treatment. As we all know drilling mud is very important medium material, which can carry the drilling cutting from well, and balance the pressure between inside and outside well. However, drilling mud include lots solids, it keep the mud in a high density and high property. These solids are very easy to settle down on tank bottom. Mud agitator is one kind very efficiency equipment to blend mud.
Last week, we just delivered 12 agitators for offshore drilling platform. These agitator’s power is 15 kw with double layers impeller. When client install these agitator on tank, we suggest every 3 meters mount a agitator. Because the too long distance will reduce the mixing efficiency. When you select agitator , firstly need to consider the tank depth, when the depth is too high, we will recommend double layers or three layers even 4 layers agitator. The second factor is mud density, the high density also required the bigger power motor to provide driven force. The third factor is diameter of impeller, when the mud width is big, we also need to provide a longer impeller to make sure the impeller can blend the mud of edge. The number four factor need to consider the explosive standard, in different work area, which will require a different explosive proof standard ,most job site will require the equipment can be used in zone 1 application ,but on offshore drilling of ocean drilling platform ,Client normally need zone 1 application. GN can reach all these required.
The agitator actually have 2 structure, one is horizontal structure. The motor and shaft connected with right angle. The other structure is motor direct connect with reducer through flange, this structure can provide more higher efficiency transmission efficiency. And it demand less area.The cost of this kind agitator is higher the horizontal structure. However, it is getting more and more popular. If you have demand on mud agitator, welcome to contact GN.
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Published: 01 May 2022
In oil gas industry, the oil sludge always the most tough thing for people to treatment. Oil sludge can not be naturally degradative and it can exist for many years with high pollution. Oil gas industry generated large oil sludge when drilling and oil storage. The oil basement drilling mud after treatment by solids control equipment, the drill cutting is one kind of oil sludge. All environment laws of different countries ruled that these kind sludge must be treated and not allowed to dump into nature environment. In other hand, oil sludge drilling mud also content drilling mud can be recycle for reuse, and as we all know drilling mud is very expensive. Whatever about the environment protection or reduce the drilling cost, the treatment of oil sludge is very necessary.
Different with drilling mud. Crude oil store always generate large sludge. Almost in all crude oil tank ,there will be settled lots of sludge on bottom. All we sure these sludge include lots valued crude oil can be recycle. For this kind oil sludge , GN developed oil sludge treatment system.
This system include chemical doing module ,thermal module, shake module, Decanter centrifuge module and also disc centrifuge module. As we all know, in low temperature, the oil is hard to separated off from solids. and we have to mixed with water to dilute the solids content, meantime wash the oil out from solids. In this case, higher temperature will be better for separation. Our thermal module can heat the sludge into 70 degree. After that we will mixed with emulsion to change the oil into some status that can be separate away with water. After that , slurry will be process be shake to remove out lot of solids, and then decanter centrifuge to remove fine solids. At last, feed into disc centrifuge to separate the water and oil away. In this system, we can get the very clean water and oil,
To different project, GN can provide several model with different treating capacity. You will be welcomed to contact us for more info.
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Published: 23 April 2022
GN is one of the earliest China manufacturer that get into solids control industry and serve oil gas industry. With the 15 years development, GN get his reputation from user. Solids control equipment is what the best we do. GN has the whole series solids control equipment from primary separation to the end waste treatment. We can design and manufacturer the whole set solids control system. Today I will introduce the core equipment of solids control system GNLW-363 Decanter centrifuge.
As we all know shale shaker, mud cleaner both only can provide the big size particle in drilling mud. If client want to get cleaner mud, Decanter centrifuge is the best choice for further process of drilling mud. Actually the Decanter centrifuge application in drilling industry has been long history. The drilling mud after recycling time by time, the big particle can be move out by shale shaker. But with accumulation of tiny particle, the drilling mud property will be affected. Only the Decanter centrifuge can remove these tiny solids quickly. GNLW363 is specially designed for this application. Engineer considered all factors of drilling mud treatment when design this model centrifuge. Firstly, separation G Force, different with other industry requirement , the density of content particle in drilling mud is much higher than waters, so 2500 separation G force with 3500 rpm is enough for drilling mud treatment. In solids control system, the decanter centrifuge running is discontinuous, only when the tiny solids accumulate to a certain point, we run centrifuge. So 363 decanter centrifuge with 30m3 per hour treating capacity is suitable. If client required capacity is bigger, we can add one extra machine for use.
GNLW363 decanter centrifuge has fixed speed, VFD control and FHD. VFD and FHD are convenient to adjust centrifuge speed according to mud situation. And the flow rate of feeding pump is also adjusted by centrifuge box of decanter centrifuge.
We sold decanter centrifuge to more than 75 countries, if you need them, welcome to contact us.
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Published: 09 April 2022