SD Series Single Cone Bit

Cutting Structure

In response to the fact that compacts in different areas on the cone have different cutting actions, conical inserts are placed in permanent contact area and wedge inserts are placed in alternative contact area so that the drilling efficiency is greatly improved. Wear resistance of cutting structure is enhanced by setting PDC cutters in the permanent contact area of the cone where inserts are almost severely worn. Carbide inserts are quipped on cone top surface to protect cone base material from erosion.

Gauge Structure

With active cutting gauge protection inserts on bit body, the bit has good gauge protection and updrill capabilities.

Bearing Structure

High precision journal bearing. Ball lock cone. Hardfaced head bearing surface. Cone bearing inlaid with friction reducing alloy. Abrasion resistance and seizure resistance of the bearing are improved. Compared with tricone bit, the bearing size is bigger, so it can receive higher WOB and high reliability.

Hydraulic Design

Small angled lower watercourse design increased shirttail thickness and can effectively prevent watercourse erosion. Optimized hydraulics structure improves the cleaning capability and increases ROP.

Product Application

It is suitable for sidetracking, deep well drilling and old well repairing.

• Bit Size		Bit Model
  inch	mm
  4 1/8	104.8	SD527 SD547 SD617
  4 1/2	1 14.3	SD527 SD547 SD617
  4 5/8	117.5	SD527 SD547 SD617
  4 7/8	123.8	SD527 SD547 SD617
  5 1/2	139.7	SD527 SD547 SD617
  6	152.4	SD527 SD547 SD617
  6 1/2	165.1	SD527 SD547 SD617
  7 1/2	190.5	SD527 SD547 SD617
  7 7/8	200	SD527 SD547 SD617
  8 1/2	215.9	SD527 SD547 SD617