Marvin F. Glotfelty, RG, on String Weight Analysis | NGWA: Industry Connected

Опубликовано: 12 Март 2025
на канале: National Ground Water Association

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Marvin F. Glotfelty, RG, shares two string weight analysis examples from 2003. From them, Glotfelty shows that adding filter pack sand increase the string weight by tens of thousands of pounds in some cases and swabbing that filter pack to settle it further increases that string weight. Glotfelty also concludes that if there are multiple screened intervals, the uppermost filter pack intervals will have less impact than the lower one, and bentonite and cement annular seals both apply buoyancy effect that seem to relieve these stresses. It's important to consider these conclusions when designing, constructing, and operating a well.

See Glotfelty's latest column for Water Well Journal, The Art of Water Wells, at https://waterwelljournal.com/category....

Glotfelty has also written a book, The Art of Water Wells. It is a 2019 book from NGWA Press that is a comprehensive overview of well systems and delivers practical information applicable to real-world situations. The book is ideal for everyone working in the groundwater field. It provides practical information of water wells-covering everything from site selection to design, drilling methods, economics, and more. To learn more and purchase the book, visit https://my.ngwa.org/NC__Product?id=a1....

Is there a drilling issue that you have wondered about for a long time? A question you have wanted a second opinion on for a while? Send them to The Art of Water Wells column author Marvin F. Glotfelty, RG, and he will utilize his more than 35 years of experience to tackle the question for you. Email Glotfelty at [email protected], and the answer will appear in an upcoming NGWA: Industry Connected video.