No single screen type is appropriate for all wells. Roscoe Moss Company is the only manufacturer in the world producing shutter screen and continuous wire wrap screen. This ensures that Roscoe Moss Company’s customers receive unbiased technical assistance directed toward solving their specific problems.
Shutter screen, also known as louver screen, is manufactured by forming downward facing louver shaped openings into pipe up to 40 feet long. The process incorporates use of an internal mandrel which perforates the shutter against external blocks. Shutter screen is commonly produced from a variety of steel types including carbon, copper-bearing, high-strength low-alloy, and stainless. This type of screen is particularly suited for use in large diameter, deep, gravel envelope wells. In many parts of the world, wells of this type pump ground water from thick formations consisting of sands and gravels. Shutter screen is the product of choice for these wells because it is hydraulically efficient, strong and durable. The smooth, unobstructed interior of shutter screen allows the efficient use of highly effective development techniques such as swabbing and also facilitates employment of efficient maintenance and repair methods.
Shutter screen is available in three patterns: Ful Flo, Standard Flo, and Super Flo. Ful Flo is the most common configuration and is selected for most wells. For low-yielding aquifers, Standard Flo offers an economical and efficient alternative. Super Flo is used when screening thin, highly prolific aquifers. Other shutter screen patterns and slotted screen for special purposes are also available.
Commonly referred to as continuous slot or wire wrap screen, this product was originally developed to overcome problems associated with cable tool wells drilled in fine grained, uniform sands in the North Central United States. These wells were typically completed in relatively shallow, thin aquifers that were very prolific in terms of water production. Continuous wire wrap screen are very effective in wells of this type since they can be manufactured with very small slot size and yet still maintain the necessary open area to minimize frictional head loss.
Continuous wire wrap screen is manufactured by wrapping a shaped wire around an internal array of longitudinal rods and are joined by resistance welding. Screen sections are usually twenty feet long. Most continuous wire wrap screen is manufactured from stainless steel rather than carbon steel in order to avoid problems which often lead to accelerated corrosion.