Wireline Anchors and Torque Converters 23 WIRELINE ANCHORS. National Oilwell offers a complete line of wireline anchors to meet every need.  These field proven anchors are offered in a variety of arrangements from mast leg mounted to floor mounted.  Sizes can match the single line pull rating of virtually any drawworks.  Material traceability and models built to API-8C are also available. National Oilwell also offers the Dreco line of Deadline Anchors including the unique Rotating Drum design for ease of cut and slip operation. Special five wrap drums available for plastic coated wire rope on models 100 and 150. SERIES C HYDRAULIC OILFIELD TORQUE CONVERTERS. National Oilwell Series C Hydraulic Torque Converters are designed especially for oilfield service.  They are more compact and have fewer parts. These Torque Converters absorb nearly constant power from the prime mover, then automatically and continually adjust torque and speed according to load demands. National Oilwell Torque Converters are available in four sizes, 195, 245, 300, and 346 (hydraulic circuit diameter in inches x 10). Horsepower absorption capabilities available are 64, 80, 100, and 125 percent. Wireline Size (in.) Rating (lb) Mounting Load Cell Type Tension or Comp. Mast Leg 45,000 45,000 50,000 50,000 75,000 75,000 100,000 100,000 150,000 150,000 160,000 200,000 200,000 ⁷/8, 1, 1¹/8    ⁷/8, 1, 1¹/8   1, 1¹/8, 1¹/4  1, 1¹/8, 1¹/4  1¹/8, 1¹/4, 1³/8  1¹/8, 1¹/4, 1³/8  1³/8, 1¹/2, 1⁵/8  1³/8, 1¹/2, 1⁵/8  1¹/2, 1⁵/8, 1³/4  1¹/2, 1⁵/8, 1³/4 1³/4, 2 1³/4, 2 1³/4, 2 Floor Mast Leg Floor Mast Leg Floor Mast Leg Floor Mast Leg Mast Leg Floor Floor Floor Tension or Comp. Tension or Comp. Tension or Comp. Tension or Comp. Tension or Comp. Tension or Comp. Tension or Comp. Tension or Comp. Tension or Comp. Tension or Comp. Tension or Comp. Tension or Comp. 1³/4 - 2 1⁵/8 - 1³/4 1 - 1¹/4 1¹/4 - 1⁵/8 ⁷/8 - 1¹/8 ³/4 - 1 190,000 160,000 50,000 100,000 40,000 30,000 Floor Floor Floor Floor Mast leg Mast leg Compression Compression Tension Tension Tension Compression Type H190 Type H160 Type D Type EB Type F Type G Wireline size (in.) Rating (lb.) Mounting Load cell type Model Rotary Slip Anchor National Oilwell’s Series “C” Torque Converter