Product Main

Specifications

Every slot of slotted screen pipe with compound cavity cutted bu laser from outside to inside of the liner consists of trapezoidal slot similar to rectangle with outside narrow and inside wide,transitional arc and another trapezoidal slot with one large angle.The outside trapezidal slot is similar to rectanglewhose thickness is 2~3mm.The angle of outside trapezoidal slot is very small,which weakens the fretting corrosion ratio of oil with sand and then prolongs the sevice life of screen liner.Because of the large angle of inside trapezoidal slot,the flow resistance of crude oil caused by the slot can be greatly reduced,which improves the efficiency of oil production.Slotted screen liner has advantage in self-cleaning
It is cutted by plasma.When the plasma blaze with high frequency and temperature is processing the screen liner,the water-base compound operating fliud produces electroytic dissociation thermal decompsing reactivity,whose production reacts with external metal material of screen liner.The surface of screen liner is simultaneously affected both the heating by the plasma blaze with high frequency and temperature and the cooling by the operating fluid.Consequently there generates a 0.1~0.2mm hardening and antiseptic layer on the processed surface of screen liner which can effectively advance the abrasion resistance and inoxidizability of the slot.

Fig2.The transverse metallograph of the screen liner with compound cavity
 
 
Fig3.The section view of the slot reinforcement of the new screen liner