After closing its US$2.5 billion acquisition of well-drilling equipment parts provider Robbins & Myers, Houston-based National Oilwell Varco (NOV) adds three more businesses to its NOV Mono division: Moyno Inc., Chemineer Inc., and Tarby Inc. The three additions make NOV the largest designer and manufacturer of progressing cavity pumps. NOV Mono Senior VP, Santosh Mathilakath, said that the acquisition of these companies represents a new force in the industrial pump arena, creating growth opportunities and faster response times for consumers.