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Drawworks

National Oilwell Varco offers three basic drawwork concepts which provide our customers with the most advanced drawworks in the industry:

Active Heave Drilling Drawworks (AHD) combine the latest technology in controls and design. These drawworks eliminate the need for overhead motion compensation machinery. In addition, braking energy is regenerated and feed back into the drilling rig electrical system which increases overall rig efficiency. And due to active heave compensation the "drilling operational window" is increased by allowing drilling programs to continue in heavier seas than conventional drawworks.

Drilling Drawworks are skid mounted and designed for continuous drilling service. National Oilwell Varco offers customized designs per customer specifications or standard models.

Workover Drawworks are typically integrated into mobile workover or service rigs. These are typically mounted onto trucks and designed for lighter intermittent service work. National Oilwell Varco offers customized designs per customer specifications or standard models from the Kremco line. Any Drilling Drawwork can be used in a workover application. However, most workover applications will typically not require more than a 1000 HP (750 kW) drilling drawworks.

National Oilwell Varco also manufactures a line of Baylor™ motors for Drawworks power. These motors provide increased electrical performance and superior mechanical durability.

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AHD-500 Active Heave Drilling Drawworks
AHD-750 Active Heave Drilling Drawworks
AHD-1000 Active Heave Drilling Drawworks
AHD-1250 Active Heave Drilling Drawworks
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Rig Solutions
ADS-10D AC Electric Gear Driven Drawworks
ADS-10T AC Electric Gear Driven Drawworks
ADS-30D AC Electric Gear Driven Drawworks
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