In this ISSUE

摘要

The September 2021 issue of Water Well Journal focuses on heavy equipment and features WWJ's annual heavy equipment directory, as well as a variety of articles focusing on such equipment. The "2021 Heavy Equipment Directory" found on page 27 features product details and contact information for industry manufacturers of drilling rigs, compressors, pump hoists/service trucks, mud recycling systems, and water trucks/rig tenders. It's a one-stop shop for you when the time comes to make that next important purchase for your company. In the cover story, WWJ Senior Editor Mike Price gathers helpful information from industry experts to write "Well Development Using Compressed Air," which begins on page 17. In the article, Price writes how rotary screw air compressors have become common in the industry over reciprocating piston compressors. The article details how to size the compressor for one's needs, common mistakes contractors make when developing the well using compressed air, and compressor maintenance tips. Such mistakes can include not using the correct sized compressor, not using swabbing or jetting tools, using too much polymer when drilling, and drilling too big of a well with too much gravel between the well and casing.