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NOV (Shaffer)

Shaffer (NOV) BOP Rams

National Oilwell Varco (NOV) is one of the world’s three major blowout preventer manufacturers. By continuously increasing the breadth and depth of products and services offered, NOV has become the steward of more than 40 industry-leading brand names, one of which is Shaffer, during the past 140 years.

These strategic mergers and acquisitions have included some of the leading names in the upstream oil and gas industry, and allow NOV to offer a full line of high-quality products and solutions. The Shaffer record of reliability in pressure control equipment is the result of continual research and development, advanced manufacturing techniques, stringent quality control and steady follow-through on after-the-sale training, service and parts. This reliability is available in ram, annular and rotating blowout preventers.

Variable Bore Rams, Inc. offers the following types of NOV (Shaffer) blowout preventer rams:

Shearing Blind Rams
Straight Bore Rams
Variable Bore Rams
Temperature Rating


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