WHAT'S NEW IN PRODUCTION EQUIPMENT, TECHNIQUES.

Ten selected capsule reviews of recent production developments provide basic principles of useful new mechanical devices and field methods. Interpretive illustrations simplify several lengthy patents, technical papers and product descriptions. Among techniques and/or devices described are: Unique pumping unit design; viscous fluid rod pump; how to pump wells with cables; gravel packing tool or slant holes; chemical stabilizer for clay plugging; concentric tubing safety valve completion; shaped charge powered formation sampler; super-accurete BHP gage; vacuum removal of O//2 from water; and multi-wrapped sand screen.