vibrating screen Long hole screen or square hole screen?

Under the harsh working conditions of the shale shaker, the choice of square mesh and slot/rectangular mesh directly affects the filtration efficiency, life and operation and maintenance costs. The following is an in-depth comparative analysis based on fluid mechanics, structural mechanics and field data:

1、Core performance comparison

2. The influence mechanism of hole structure on mud screening

2.1. Fluid dynamics behavior

2.2. Difference in mechanical strength

Under the same load, the fatigue life of the long hole mesh is only 40%~60% of that of the square hole mesh.

3. Optimal optimization strategy under different working conditions

Scenario 1: Deep well drilling (high-density mud + hard drill cuttings)

Problem: High solids loading leading to rapid clogging

Solution : Long hole mesh (opening rate > 60%, aspect ratio 3:1)

Reason: High flow rate delays screen sticking, and turbulent cleaning effect reduces the frequency of shutdown and flushing

Data support: On-site tests show that the processing capacity of long-hole mesh increases by 35%, but the service life is reduced to 70% of that of square-hole mesh.

Scenario 2: Shale gas horizontal well (flaky shale cuttings + high viscosity mud)

Problem: Flake particles are stuck parallel to the square hole

Solution : Long hole mesh (parallel mud flow in the long side direction)

Parameters: Short side width = target separation particle size × 1.3, aspect ratio ≥ 4:1

Effect: The blocking rate of flake particles is reduced by 50%

Scenario 3: Ultra-deep well high temperature environment (high frequency vibration + thermal stress)

Problem: Thermal-mechanical fatigue leading to premature fracture

Solution : Square hole mesh + high temperature nickel brazing node reinforcement material: 316L matrix + Inconel 718

Lifespan: 200% longer than square hole mesh, 350% longer than long hole mesh

Suggestion

1. Normal working conditions:

Choose square mesh (long life, stable precision), increase the wire diameter by 0.05mm to compensate for the loss of opening rate

2. High solids/flaky particles conditions:

Choose long hole mesh (length-to-width ratio ≥ 3:1) to reduce wear

3. High-end solution:

Gradient composite hole mesh (square hole + long hole partition), optimal comprehensive cost

4. Required parameters:

The short side dimension tolerance of the long hole mesh must be tested (needed to be ≤±3%), otherwise the separation accuracy will be out of control