https://www.usa.gov/copyrighted-government-workshttps://www.rawpixel.com/image/12145429Edit ImageSaveSaveEditCropCustom TextTightening the nipple on the end of drill pipe oil field, Kilgore, Texas. This part of operation to determine direction and draft of drilling by Russell LeeView public domain image source hereMorePublic DomainFree CCO U.S. Government image for Personal and Business useInfoView CC0 LicenseJPEGTIFFSmall JPEG 1200 x 845 px | 300 dpiLarge JPEG 3500 x 2465 px | 300 dpiBest Quality JPEG 4258 x 2999 px | 300 dpiTIFF 4258 x 2999 px | 300 dpi | 24.36 MBFree DownloadTightening the nipple on the end of drill pipe oil field, Kilgore, Texas. This part of operation to determine direction and draft of drilling by Russell LeeMore