1. High Structural Strength, Adaptable to Harsh Working Conditions: Johnson screens are constructed using V-shaped wires welded to support ribs, rather than traditional drilling or slotting processes.
• This structure enhances the screen's overall resistance to compression and tension, enabling it to withstand the high temperatures and pressures of deep wells and formation collapse.
• Uniform and robust welds reduce the likelihood of cracking due to vibration or formation displacement, significantly extending service life.
2. Controllable Filtration Accuracy, Stable Sand Control: The filtration gap is determined by the distance between the V-shaped wires and support ribs, with an accuracy range adjustable from tens of micrometers to millimeters.
• The uniform and durable gap prevents it from widening due to wear, unlike slotted screens, thus preventing formation sand from entering the wellbore.
• The unique cross-sectional design of the V-shaped wires creates a self-cleaning effect, reducing sand accumulation on the screen surface and lowering the risk of clogging.
3. Large Flow Area, Improved Mining Efficiency: Compared to other types of screens, Johnson screens have a higher open area ratio, typically reaching 20%-50%.
• A larger flow area reduces fluid flow resistance and minimizes production loss, especially beneficial for high-yield oil and gas wells.
• More uniform fluid distribution prevents erosion caused by excessively high local flow velocities, protecting the wellbore and equipment.
4. Convenient installation and maintenance, reducing operating costs. Johnson screens can be prefabricated to fit wellbore dimensions, eliminating the need for on-site fabrication.
• Single lengths can reach several meters, reducing downhole connections, shortening installation time, and lowering operational risks.
• Strong structural stability and low failure rate reduce well workovers, indirectly lowering overall production costs.
