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Welded Blade Stabilizer

Welded blade stabilizers are designed to mantain stiffness of the drill string in order to prevent the deflection of the borehole and to ream the drill hole. According to their position in the drill string the welded blade stabilizers are used as a stabilizers for rock-bits and placed just above the bit for borehole reaming. They can also be placed in the drill string, at different distances from the bit to stabilize the drill collars and drill string.

Welded blade stabilizers are available in any size with any connection.

Variable Blade Stabilizer

Variable Blade Stabilizer

The Variable Blade Stabilizer ensures smooth and efficient pipe cutting operations, reducing the shock load on cutting knives, arms and the entire fishing string by centralizing the milling equipment in the hole.

This tool is designed to stabilize pipe cutters in large bore cutting operations, and its replaceable blades make dressing for different sizes of casing a quick and easy process. Stabilizer blades are readily replaced by removing two locking pins, and are available for casing from 16 inches to 48 inches in diameter.

Features and Benefits:

  • Reduces shock load on cutting knives, arms and fishing string
  • Stabilizer blades change quickly to dress for different casing sizes
  • Blades are made of 1020 steel to minimize casing wear


  • Large bore cutting operations where work string shock load must be controlled
  • Cutting multiple eccentric strings, requiring an interrupted cut
  • Cutting strings of varying inside diameter

Integral Blade Stabilizer

The Integral Blade Stabilizer is manufactured from high-strength alloy steel as a single piece tool. The unitized construction features three spiraled ribs designed to minimize downhole torque, reduce damage to the hole wall and ensure maximum fluid circulation. The tool is well suited for use in most formations from soft and sticky to hard and abrasive. It is available in both bottom-hole and string designs, providing the flexibility to run it anywhere in the bottom hole assembly.

When the blades wear down to an unacceptable diameter, the tool should be removed from the drilling assembly and returned to a Lone Star Drill Bit Service Center where it can usually be redressed to full gauge.

Features and Benefits:

  • The blades are an integral part of the tool body, eliminating the risk of leaving components or pieces in the hole
  • Available in both “open” and “full wrap” designs, providing optimum hole wall contact while ensuring maximum fluid bypass area
  • Available in Type 200 and Type 300 wear surfaces


  • A packed hole assembly typically requires the placement of multiple stabilizers throughout the three zones of stabilization. Contact a Lone Star representative for BHA recommendations
  • A pendulum assembly is a recommended application for the tool due to its unitized design. For the most effective pendulum assembly, two stabilizers should be run separated by one drill collar
  • Vibration and drill collar whip can be reduced through the placement of stabilizers in the BHA and upper drill collar string

Integral blade stabilizers are available in any size with any connection.