WorldWide Drilling Resource

9 SEPTEMBER 2021 WorldWide Drilling Resource ® Newest Edition of Best Practices Guide Available The Common Ground Alliance (CGA) released their Best Practices Guide 18.0 , the newest edition of the preeminent resource in underground damage prevention, which is regarded as the trusted guide to protect vital underground infrastructure and improve safety during excavation activities conducted in the vicinity of underground facilities. The latest edition includes over 160 Best Practices established by a consensus of CGA’s 16 stakeholder groups providing damage prevention recommendations based on practices currently being utilized, and categorized by six key industry areas to provide guidance along the entire safe digging process: One Call Center, Facility Owner, Excavator, Locator, Project Owner, and Designer. “Since CGA was founded 20 years ago, the Best Practices Guide has continued to be the go-to resource for effective damage prevention practices that help stakeholders protect underground utilities, and keep the people who work and live near them safe,” said Sarah K. Magruder Lyle, president and CEO of CGA. “As technology continues to advance in ways that simplify and enhance the damage prevention process, we look forward to working as an industry to identify Best Practices - and improve upon existing ones - to help us reach our shared goal of zero damages.” For a link to this website, visit this page at: worldwidedrillingresource.com Packer Options for a Variety of Jobs Adapted from Information by QSP Packers, LLC Quality packers are crucial to getting jobs done and are an essential component of grouting, mining, environmental, geotech- nical, and water well industries. Packers are used in projects such as dam construction; tunnelling and deep foundations; and wireline core drilling and coal. A wide variety of packer options are available depending on the job at hand. Inflatable Packers - Typical grouting jobs use inflatable or mechanical packers. The choice is based on the condition and depth of the borehole while also considering available support equipment. Inflatable packers come in various lengths ranging from ten inches up to five feet or more. They are specifically designed for depths common to grouting jobs. A sliding-head design allows them to double in size from their run-in diameter and usually provides a longer seal than a mechanical packer. Mechanical Packers - Mechanical packers are sometimes called surface set packers. They are typically made to be set anywhere from 12 inches to 20 feet in depth. The length is determined by where the seal will be located downhole. Mechanical packers work well for surface plugging applications or surface setting for low-pressure grouting. They can also work in cased holes, but in irregular holes, mechanical packers may not expand adequately to seal washed out zones properly. Mechanical packers may be used for freeze plugs, low-pressure injection, grouting, air sparging, and to control flows from artesian wells. Wireline Packers - Wireline packers can save time when conducting permeability testing during core drilling. Testing is carried out with the drill string in place, which reduces the time required to test in open or unstable formations. Wireline packers incorporate a bumper that rests inside the throat of the drill bit to position the packers and protect the drill bit. Environmental Well Packers - Environmental packers are fixed-end style packers. They are designed for use in projects such as groundwater monitoring, methane gas control or collection, vacuum sampling, formation pressure monitoring, and zone sampling and injection. Environmental packers are designed for use in cased wells and may be used residing above or below the applicable pump. Miscellaneous sizes of grout packers. C&G

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