Page 257 - Shale Shakers Drilling Fluid Systems

TROUBLESHOOTING GUIDE 239

Common Causes of Screen Failure:

1. Personnel improperly trained on handling, storage, maintenance, and installation of deck rubber and screen assembly.
2. Improper handling during installation—screens damaged before using.
3. Deck rubber improperly installed.
4. Improper tension during installation. Continuous screens should be retensioned within one-half hour of installation,
every four hours during the first 24 hours of operation, and once per hour thereafter.
5. Careless storage allowing grit and sand between layers on multiple screen assembly.
6. Tension strip improperly seated in the screen hook strip.
7. Deck rubber is worn, damaged, or dirty.
8. Tension rails damaged allowing improper tensioning of the screen assembly or damaging of the hook strip.
19. Dried cuttings and drilling fluid left on screen during shutdown of shaker.
10. Cuttings accumulate under edge of screen.
11. Tensioned screen assemblies on shaker used as worktables.
12. Improperly manufactured screen assemblies.