shaker screen GN Shaker Screen

The cost compareing between solids control and new drilling mud

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.

GN Participated in 2022 OTC in Houston

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 4^th 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.

Mud Agitator for Offshore Drilling Project

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.