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Oil Drilling Fluids Shale Shaker Screen-KOSUN

In China oil drilling fluids solids control industry, KOSUN is a pioneer and leader, we has been providing solids control equipment for more than 20 years, the products include shale shaker, shale shaker screen, desander, desilter, vacuum degasser, centrifugal pump, submersible slurry pump, shear pump, mud agitator, mud gun, drilling fluids mud cleaner, decanter centrifuge, jet mud mixer, mud tank, diesel tank, water tank and complete solids control system, etc.

shale shaker screen
shale shaker screen

Shale Shaker Screen is main spare parts for shale shaker. Shale Shaker Screens are easy to be broken during the shaker operation when drilling well.

Drilling fluids shale shaker is a kind of filterable mechanical separation equipment, compared with other mechanical solids control equipment, its unit cost is kinda of economic. And it is a highly efficient separation equipment which obtains solid removal amount. Drilling fluids shale shaker is made of screen body, machine rack and gearing. Accordingly, mechanical vibration will make solid phase which is bigger than screen hole and the adhesive attraction will screen the solid phase particles which is smaller than screen hole. But all mud can’t be processed in circulating process because of the limit of shale shaker mud permit.

Usually the material of drilling fluids shale shaker is stainless knitted. Usually this kind of screen uses mesh to express the specification. Mesh is the number of screen holes, for example, a square screen that has 12 holes is called 12-mesh screen. Screen with a special outfit screen holder will screen into flake tension type fixed on the screen frame. Screen body is fixed to the rack based on spiral spring, and rubber articles’ bumper adopts the bottom-fixed type.

The Parts of the Shale Shaker Screen Panel

Oil Rig Shaker Screen Frame-Much like a canvas for painting a screen has to be supported on a frame in order to do its job, this frame differs between manufacturers in both material and shape. Screen frames can be made from materials, such as, square steel tubing, flat steel sheets, plastic type composites or they can just be supported on the ends with strips of steel ( similar idea to a scroll ). These frames consist of a rectangular shaped outer perimeter which is divided into small individual inner panels. These smaller panels differ in shape from manufacturer to manufacturer and have been known to come in shapes such as square, hexagonal, rectangular and even triangular.

shale shaker screens
shale shaker screens

These differing panel shapes are used in an attempt to reduce the quantity of panels on each frame but still provide maximum rigidity and support for the mesh attached to them. The purpose of reducing these panels is to maximize usable screening area as the walls of each panel get in the way of the mesh and prevent it from being used, this is known as “blanking”. The non-blanked screening area of a shaker screen is widely used as a selling point, the more screen surface you have available to work, the more efficient your shaker becomes and therefore can handle a higher quantity of fluid.

Screen Mesh-Just like thread is woven together to create cloth, metal wire can be woven to create a metal cloth. Screen Mesh has evolved over many years of competitive screen manufacturing resulting in very thin yet strong cloth designed to maximize screen life and conductance as well as to provide a consistent cut point. To increase the conductance of a mesh screen you have to minimize the amount of material in the way, this is done by either reducing the wire diameter or weaving the cloth to produce rectangular openings. Rectangular openings increase the screens conductance while minimizing the effect on its cut point where as square openings provide a more consistent cut point but offer a lower conductance.

To maximize screen life most manufacturers build their screens with multiple layers of mesh over a very sturdy backing cloth to further protect the cloth against solids loading and wear. The multiple layers of mesh act as a de-blinding mechanism pushing near sized particles, which may get stuck in the openings, out of the mesh reducing blinding issues and keeping the screen surface available for use.

Binding Agent-The binding agent is the material used to bind the mesh to the screen frame, it is designed to maximize adhesion to both materials while being able to handle high heat, strong vibration, abrasive cuttings and corrosive drilling fluids.

Plastic composite screens tend not to use adhesives but rather heat the mesh and melt it into the screen frame to form a bond.

3D Screen Technology-One of the more recent advances in oilfield screen technology has brought us the “3D screen”, this technology is an innovative method for increasing the screening area of a shale shaker without the need to build larger machines. When seen from the side, these screens look like corrugated cardboard, having a flat bottom and wavelike shapes on top. These waves are designed to increase the surface area of the screen panel by building up instead of out, thereby maximizing the surface area of the screen without the need to build larger shaker screens and in turn larger, heavier and more expensive shakers.

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Shaker Screens – Drilling Fluid Equipment of Kosun

Shaker Screens

Shaker Screens are used in Shale Shakers as part of solid control system in drilling operations of various industries, such as oil and gas drilling, mining, coal cleaning, etc. They primarily serve the purpose of separating drilling cuttings from the drilling fluids.

A shaker screen is the key component in shale shaker equipment. They function as a sieve to block the solid drilling waste and let the precious drilling fluid to be carried to a separate channel for further treatment.

shaker screen
shaker screens

Drilling fluid is a cocktail of number of chemicals that help in the drilling process. Drilling fluid is prepared in two variations – water based and oil based, and they are very costly to obtain. They serve as lubricant agent to keep the drilling waste management equipment efficiently functioning. They keep the drilling bit cool and clean to penetrate deeper into the borehole.  And because of these reasons, operators invest in technologies to lower their overall operational cost and also for the environmental purpose. Shale Shaker are one such equipment to achieve that goal.

Shaker Screens have two integral parts – a screen Panel and a screen Mesh. A screen panel will hold the mesh in place, to efficiently serve its purpose. It is much like a larger frame that holds smaller sections of the mesh with help of intersections. The frame itself comes in different material and shape. One key differentiator among them is the area of mesh between these intersection, that could be utilized for the screening. These intersections are known as “blanking”. The lower the blanking better the shaker screen’s performance.

The screen mesh could be understood as a piece of cloth woven with the wires to form fine rectangular openings. The screen mesh comes into variety in terms of its durability and conductance. Then there is a binding agent that joins the screen panel with the screen mesh.

The most modern development in shaker screen field is introduction 3D screen technology.

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Functions of Solids Control Equipment-Shale Shaker

Shaker Screen

Solid control is a method to separate solids that are mixed while drilling. The solid control technique is a five stage technique. The solid control equipment that are used are Shale Shaker, Vacuum degasser, desilter, desander and centrifuge.

A shale Shaker is used in the first step because it separates the biggest solids that are present in the mixture. Here when the mud mixture is passed through the Shaker Screen (A mesh that separates the solids), filtered mud is obtained on the other side, in a mud tank. The size of separation of the mixture depends on the size of mesh used in the Shaker Screen.
A shale shaker comprises of the following parts;
–    A feeder that is a type of pan into which the mixture is first fed.
–    Screen that separates the mixture.
–    A vibrator that is a device that gives vibratory force to the screen.

shaker screen
shaker screen

The two types of Shale Shakers are;
1) Shale shaker that works on the concept of Linear Motion: It is mainly used in oil and gas drilling. Its advantage is that it is fast and can handle heavy load.
2) Shale shaker that works on the concept of Balanced Elliptical motion: It has higher retention time than Linear Motion.

Functions of Shale Shaker:
–    Its main function is to remove maximum solids from the mixture. This will not only improve the efficiency of the drilling machine, but will also reduce the load on the subsequent equipment.
–    It minimizes the wastage that may be caused sometimes while separating the fluids from solids. This will save our precious natural resources.
–    It’s another function is to separate the mixture in such a way that the fluid that is recovered can be reused efficiently and its quality is maintained.
Some examples of Shale shakers are;
–    MONGOOSE PRO shale shaker that is equipped with dual motion technology and MD-2, Dual and triple Deck shale shaker that boasts of new innovative screen technology.