Well drilling including oil and gas drilling, water well drilling, geothermal well drilling, CBM drilling/CMB drilling, diamond drilling, etc. In so many well drilling, what will shaker screens help? How do they work?
Screen in well drilling mud process
One method of removing solids from drilling mud is to pass the mud over the surface of a shale shaker screen also refers to well drilling shaker screens. Particles smaller than the openings in the screen pass through the holes of the screen along with the liquid phase of the mud. Particles too large to pass through the screen are thereby separated from the mud for disposal. Basically, a screen acts as a “go-no-go” gauge: Either a particle is small enough to pass through the screen or it is not.
Screen surface. Screen panel surfaces used in well drilling solids control equipment are generally made of woven wire screen cloth, in many different sizes and shapes. The following characteristics of screen cloth are important in solids applications.
Well drilling shaker screen
Solids control vibrating screen structure
Almost well drilling solids control request well drilling shaker screens. This comes from mining industry. Screens may be constructed with one or more layers. Single layer screens have a single screen cloth mounted in a screen panel. These screens will have openings that are regular in size and shape. Layered screen cloth have two or more screen cloths, usually of different mesh, mounted on a supporting panel These screens will have openings that vary greatly in size & shape. They can be square, rectangular for all layers, or different layered cloth woven in different hole shape.
Mesh is defined as the number of openings per linear inch (or per centimeter). Mesh, can be measured by starting at the center of one wire and counting the number of openings to a point one inch away.
Opening size is the distance between wires in the screen cloth & is usually measured in fractions of an inch or microns. Screens of the same mesh may have different sized openings depending on the diameter of the wire used to weave the screen cloth.
The smaller the diameter of the wire results in larger screen openings allowing larger particles to pass through the screen. The larger the diameter of the wire, the smaller the particles that will pass through the shaker screen. Remember: It is the size of the opening in a screen not the mesh count that determines the size of the particles separated by the screen.
Vibrating mechanism
Shaker screens purpose in well drilling solids control is tumbling the particles to separate fluids from solids and increase through put capacity. This vibrating action causes rapid separation of whole mud from the oversize solids, reducing the amount of mud lost with the solids. For maximum efficiency, the solids on the screen surface must travel in a predetermined pattern. For example; some devices use elliptical motion and others use Linear motion to increase efficiency. The combined effect of the screen and vibration, result in the separation and removal of oversized particles from drilling mud