Drilling Shale Shaker vs Desilter vs Desander

Understanding the distinct roles of a drilling shale shaker, desander, and desilter is essential for proper solids control system design. Aipu Solids Control manufactures all three equipment types and provides guidance on their complementary functions.

Shale Shaker: First-Stage Bulk Separation

The shale shaker processes the entire returning fluid stream and removes the largest, most voluminous cuttings fraction using vibrating screens. Aipu shakers operate at 6.0G to 7.5G with screens from 40 to 200 mesh, handling flow rates up to 420 cubic meters per hour. The shaker is the essential first stage—without effective shaker performance, downstream equipment cannot function properly. It removes solids typically larger than 74 to 100 microns depending on screen mesh selection.

Desander: Medium-Sized Solids Removal

The desander uses hydrocyclones to remove sand-sized particles from drilling fluid. Aipu desanders typically feature 10-inch or 12-inch cones that remove solids in the 45 to 74 micron range, though actual cut point depends on fluid properties and operating conditions. Desanders process a portion of the fluid stream rather than the full flow, with cone underflow discharged to the next processing stage or to a shaker for further dewatering.

Desilter: Fine Solids Control

The desilter provides the next level of solids removal using smaller hydrocyclones (typically 4-inch or 5-inch) that remove solids in the 15 to 45 micron range. Like desanders, desilters process a portion of the fluid stream. Aipu desilters are often combined with a fine-mesh shaker deck to create a mud cleaner configuration that recovers barite and valuable fluid from the desilter underflow.

Sequential Processing Logic

The three equipment types work in sequence: shaker removes coarse solids, desander removes sand-sized particles, and desilter removes silt-sized particles. This sequential arrangement is deliberate—each stage removes a specific size range that would otherwise overload downstream equipment. Attempting to skip stages or operate equipment out of sequence compromises the entire solids control system.

Equipment Selection Guidance

Every drilling operation requires a shale shaker. Desanders are needed for unweighted mud systems in formations producing significant sand. Desilters are beneficial for all mud systems requiring fine solids control, particularly weighted systems where they are configured as mud cleaners. Aipu provides integrated solids control system design that properly sequences and sizes all three equipment types.

Partner with Aipu for certified quality. Contact us at info@aipusolidcontrol.com to discuss your requirements and discover the Aipu difference in API Q1 certified solids control equipment.