Pyramid screens operation is important for users. We should treat pyramid screens performance or failure objectively. While it is true that “Pyramid Screens” channel solids and do wear more rapidly on the bottom of the valleys, this can be largely offset by setting up the shaker to account for this bias. One of the main design reasons for the corrugated configuration is to allow drilling fluid to pass through the screen more quickly than on flat screens

Pyramid screens detail

Pyramid screen panels also referred to corrugated shaker screens. It is an innovated design of Derrick Corporation. Many shaker screen panels can be fabricated as pyramid type. Many clients prefer pyramid screens but some don't. Please find more information and find out why they have different preference?

The first thing to remember is that the corrugated screen has more square footage than a flat screen of the same width. Where the flat screens may be completely covered in cuttings, thus creating a solids barrier between the fluid and the screen mesh, the configuration of the pyramid shaker screen is such that the solids collect in the valleys, allowing much faster throughput of the fluid through the ridges of the screen, where there is no solids barrier. This in turn, translates to a reduced residence time on pyramid screens to achieve the same performance as a flat screen.

Tips while operate pyramid shaker screen

A lower deck angle is most important for preventing accelerated wear on corrugated screens. Many people use the same deck angle for pyramids as flat screens. This is incorrect. As a matter of fact it can be detrimental to performance. Under most circumstances, the rule of thumb of 75% fluid coverage on the shaker bed can be achieved with all corrugated screens at a lesser shaker angle than with flats. This means that the solids move down the screen faster, reducing the potential for wear

Also, it has been demonstrated that pyramid screens perform better and last longer on higher G shakers and shakers with elliptical motion. With proper deck angle, both of these conditions promote faster solids transfer down the screen and help minimize wear. As with anything, there are exceptions to this. Extreme solids overloading (more solids on the screens than they were designed to handle), as in high ROPs on big hole sections, can cause extremely fast wear on any screen. Fluid makeup and bit type can also influence screen wear

Corrugated shaker screen failures

So many years, we got a lot of appreciation on our shaker screen both PMD and flat type. Honestly speaking, we do also get the complaints and dissatisfaction from users. How should we avoid the failures and overcome them? How should we treat such problems?

One major consideration in screen wear is screen mesh. Higher number screen meshes translate into ever smaller openings in the screen. In order to achieve these smaller openings, either one or both of the directional top wires (horizontal or vertical) must get smaller in diameter. Because of this, the finer the mesh the more rapid the wear, even under optimum conditions. Add the dynamics of improper mesh selection, high ROP, incorrect deck angle or a host of other variables and screen wear can be unbelievably rapid

Kindly keep the operation tips in mind and inquire us for legal proper operation on pyramid shaker screens. Actually, at some occasion where running a combination of flat and corrugated screens may yield very satisfactory results. We suggest the corrugated on the feed end and flats on the drop. Usually two and two. My reason is that, on lower G shakers, corrugated all the way to the end usually carry more fluid off with the cuttings and substituting the flats allows the cuttings to “spread out” and give up more fluid than if they remain in the bottoms of the channel

Please feel free to contact us if any question. We are happy to answer you rapidly