Trenchless Technology is here to help. This special Sponsored Content section presents you with answers to some questions you may when it comes to tackling your upcoming jobs, whether it’s how to approach a point repair or what you should consider when purchasing various new equipment. The companies participating in this How to Guide share their expertise on how their products/services can get the job done faster, save money, keep crews safe or solve a customer challenge.
As a worldwide manufacturer of trenchless pipeline installation equipment since 1987, we’ve found a frequently asked question from contractors is the proper screen mesh to use in any given drilling situation. The answer is not simple because of various factors. What type of material is being drilled? What is the flow rate and mud viscosity? Are linear or elliptical motion shakers being used, and what percentage of solids are being returned through the mud system?
From this information a reasonable “guestimate” can be made regarding the choice of mesh. It is essential to keep a good variety of screen mesh on hand to cover the many ground conditions encountered during drilling. A general rule of thumb is to use as fine a mesh as possible without any liquid loss over the end of the shaker. A mud system is definitely not a “set it and forget it” piece of equipment. A properly trained mud man can help get the most out of the solids control process. Maintaining the optimum screen mesh will save considerable wear, tear and operational costs on pumps and downhole tooling.
It is also important to have TRI provided screen plugs on hand capable of preserving functional integrity for damaged screens until the job is finished. It should be noted screen plugs are not permanent repair. They’re a temporary fix enabling operators to complete the task at hand.
Unless the customer specifically requests certain mesh screens, TRI typically supplies 40 mesh for the scalping shakers, 145 mesh for the desanders, and 180 mesh for the desilters.
Suggested spare mesh screens are: scalping – 10 to 75 mesh, desander – 100 to 165 mesh, desilter – 165 -220 mesh. Contractors can always feel free to contact TRI with questions about screen mesh selection.