Lev Nelik

• Progressing cavity pumps, downhole pumps, and mudmotors
• Centrifugal and rotary pumps
• Gulf Pump Guides
• Pumps and Pumping Systems Made Easy and Fun - Volume 1
• Pumps and Pumping Systems Made Easy and Fun - Volume 2
• Pumps and Pumping Systems Made Easy and Fun - Volume 3
• Vertical Pumps Repair Specification (Vprs), Rev. 1b