Shaker screen failures and solutions

Shaker screen failures will lead to many problems. What will cause screen failure? How should we solve it?

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Shaker screen failures

Including surface cloth broken (with large crack), rubber strip pill off from panel, the screen common abrasion on screen cloth and support frame or back plate. If they are composite screens, the screen cloth may pill off from composite frame. Furthermore, the improper fabrication may lead whole screen panel crack. Such as the welding line or point between plate and tubes.

When we face the failures please treat it seriously but rationally. We need to find out the causes for solutions.

Screen failure causes

The causes of premature screen failure are:

• Mishandling of screen panels during storage
• Improper handling during installation
• Improper installation of shaker screen to shaker basket
• Improper selection on mesh size
• Shale shaker is not in good condition
• Over/Under tensioning
• Dirty, worn or improperly installed deck rubbers
• Improper cleaning of the screens while in storage
• Extremely high mud weight
• Heavy solids loading
• Improperly manufactured screens
• Use of high pressure wash guns to clean or un-blind screens

Screen failure solutions

Shaker screen is rather important for well drilling. We ever talked about this many times. Solve the screen failures are more important than change screen suppliers. As we are not sure if new supplier can provide right screen based on present working condition

If we face screen failures we have to send feedback to screen supplier. Get them as more detail as we can. Such as working condition, service life, supposed failure reason, compared with original screens performance which aspect should be improved. We can get the record of original screen operation compared with replacement screen operation under the same working condition. Then we&#;ll find more helpful reference.

According to practical failures and technique support we can confirm the causes. Then provide the solutions. For example, if the failure is because of bad shaker condition we have to maintain or repair shaker firstly.For almost causes, we can find we need to operate shaker and screens properly. Do the operation according to manufacturers&#; guidance and instruction.

Different users will always give us different feedbacks on same model screen. So on same failures we may also have various solutions. Please contact us if you have such problem or confusion

When shale shakers cease to operate as expected, a variety of items need to be checked and the problem eliminated. This section presents a general guideline for troubleshooting some common problems observed in shaker operations. Refer to the manufacturer&#;s service manual for specific or special instructions for each design.

If you are looking for more details, kindly visit Derrick Hyperpool PMD Screen.

Always contact the manufacturer&#;s service department when you have a situation where damage or injury could result, and especially where electrical shock hazards may exist.

Shaker Problem:Items to check:Solution: Motor will not start/runPower supply incompatibleCheck power and wire motors Power supply disconnectedReconnect power Power cable failureReplace or repair cable Motor damageReplace or repair motor Overloaded or overheated motorReplace overload protection with
proper type and rating Over-greasing motorsRemove drain plug before greasing;
motor must be rebuilt if damaged Drive belt too tightAdjust according to manufacturer's
recommendations Motor overheatingMoisture in motorOpen electrical covers and allow to
dry; reseal covers properly Undersized overload heatersReplace with properly sized heaters Single phasingCheck that all leads are well connected and voltages are
consistent at each leg Unbalanced terminal voltageCheck for faulty leads, connections, and transformers Bearing failureReplace motor Drive belt problemsCheck manufacturer's
recommendations and adjust or replace Noisy operationWorn bearingsReplace motor Shock mount/float mount problemsCheck for obstructions, over/under
inflation, or breakage; adjust or
replace Loose or cracked motor mountsRe-torque and/or replace motor Shipping brackets not removedRemove the brackets Damaged or cracked shale shaker basketRepair or replace after checking
with manufacturer Object leaning against or bumping shaker basketRemove object or reposition to
prevent damage Cuttings moving erratically
on shaker screenUnit not levelAdjust installation to level position;
check tank for level alignment Motor rotational problemCheck manufacturer's
recommendations Shock mount damageReplace mounts Drive belt too tightAdjust to proper manufacturer's setting Motor failureReplace motor Mud overflowing shale shaker screenScreens pluggedReplace or clean screens Wrong screensAdjust screen size up or down to
determine proper selection Incorrect deck angleTemporarily adjust screen angle up
or down Water-wet screens in an oil-based drilling fluidChange screens; add more oil-wetter to drilling fluid Oversized cuttings returned to active systemTorn shaker screensReplace or repair torn or worn shaker screens Worn tensioning deviceReplace Leaking bypass valveRepair or replace Worn shaker screen supportsReplace or repair Improper screen tensioningAdjust screen tension Drilling fluid not added to system through shale shaker screensCheck all procedures for adding or returning drilling fluid (such as from trip tanks, etc.) No drilling fluid flowing to shale shakerValve closedOpen valve Solids blocking valve or flow lineLocate and remove or clear blockage Bypass openOpen bypass. Check bell nipple for overflow. Shaker Screen failureWithin an hourHeavy solids loading. Vibrators operating improperly. Coarse formations on fine screen cloths. Within a few hoursLoose screen cloth; Missing tension bolts or locks; Vibrators operating improperly; Damaged shaker bed; Missing channel rubbers
Improper tension. Within a dayDamaged shaker bed; Inoperable vibrator; Extremely high mud weights; Misalignment of screens; Failure to maintain screen tension. Within a few daysHematite used as a weighting agent; Worn channel rubbers; Worn side or cross supports; Bent drawbars.

Common Causes of Shale Shaker 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.
9. 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.

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   Contact us to discuss your requirements of Vortex Shaker Screen. Our experienced sales team can help you identify the options that best suit your needs.