Feb 11

GN solids control can produce replacement screens for Brandt Cobra shale shaker, both steel frame screen and pyramid screen.

Why people want Pyramid Brandt Cobra shaker screens?

A   Exclusive benefits of pyramid screen technology

1 Increased shaker capacity

2 makes fine separations

Brandt Cobra screen

Brandt Cobra screen

3 drier drilling cuttings

4 Enhanced permeability

B    Steel frame screen is constructed with two or three stainless steel layers bonded tightly to the steel frame. The frame is made of high-strength square steel tube or flat steel welded to multi- ribbed construction. These layers are coupled with the frame through metal backing plate or bonded straightly as well.

Advantages of steel frame screens

1 Using wedge-shaped fastening technology, to save screen changing time and less shaker spare parts cost

2 High strength frame, multi-ribs and the mesh cloth with moderate tension, from one reliable combination, which can increase screen’s acceptable flow, the intensity and the lifetime.

 If we combine the two type screens together , pyramid screen became the complementary of the original steel frame screen. For example, the total non-blanked screen area is increased by using pyramid technology but it still remain stable steel frame.

 Calculation of total non-blanked area for a panel screen

1 Measure the length and width of a panel opening with a dial or digital calliper to the nearest mm.

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Feb 05

GN designed some new models shale shaker in 2011, all of them are BEM shaker with 3 screen panel, the shaker screen dimension is larger than Derrick FLC 500 & 2000 series shaker, even 3 panel screen area is larger than Derrick 4 panel screen area.

The new designed shale shaker is according to API standard of design procedure,GNPS70-3,GNPS85-3 all matched standard oilfield solids control mud tank.

shale shaker

shale shaker

API standard design procedure of shale shaker

1 Shale shakers skids shall be level.

2 Shakers shall be rigged with adequate space, walkways and handrails to permit easy and safe servicing.

3 if the shaker is equipped with a rear tank, the flow line shall enter the rear tank as near the bottom as possible.

4 A means of diverting fluid from the flow line is recommended to permit the disposal of cement, spotting fluids, contaminated fluids, etc, before these fluids reach the shale shaker. The procedure shall not be used to dump the rear tank into the sand trap before trips.

operation procedure of shale shaker

1 The screens shall be inspected every time circulation is interrupted.

2 Use the shaker screens with the smallest openings that do not cause excessive drilling fluid loss.

3 Under normal operating conditions and when using a single-deck shaker with multiple screens, all screens shall have the same API designation.

4 Torn or damaged screens shall be replaced or repaired promptly.

e.g.GNZS63-3 shale shaker use wedge technology, it is easy to change and install Brandt Cobra shaker screen.

GNZS83-3 shale shaker use tension bolts to install screens.

5 When using shaker screens that need tensioning, tension shall be checked 15 min to 30 min after installation and tourly thereafter.

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