API Spiral Drilling Stabilizer and Hydraulic Adjustable Stabilizer


API 7-1 Oil and Gas Integral blade stabilizer non rotating integral spiral blade drilling string stabilizer centralizer.

A drilling stabilizer is a piece of downhole equipment using in the bottom hole assembly (BHA) of a drill string. It mechanically stabilizes the BHA in the borehole in order to avoid unintentional sidetracking, vibrations, and ensure the quality of the hole being drilling.
It is composing of a hollow cylindrical body and stabilizing blades, both made of high-strength steel. The blades can be either straight or spiralled, and are hardfacing for wear resistance.
Several types of drilling stabilizers are using in the oilfield today. While integral stabilizers (fully machined out of a single piece of steel) tend to be the norm, other types can be using, such as :
Replaceable sleeve stabilizer, where the blades are located on a sleeve, which is then screwing on the body. This type can be economical when no repair facilities are available close to the well being drilling and air freight has to be using.
Welded blades stabilizer, where blades are welded onto the body. This type is usually not advising on oil wells due to the risks of losing blades, but is regularly using when drilling water wells or on low-cost oilfields.
Usually 2 to 3 stabilizers are fitting into the BHA, including one just above the drill bit (near-bit stabilizer) and one or two among the drill collars (string stabilizers).

  • Model “LX” Integral Spiral Stabilizer is dividing into drill string model and near bit model. This product welded carbide in the spiral rib belt . It’s characterizing by high hardness, good toughness and wear resistance, as well as long service life.


  • Model YTLX hydraulic adjustable stabilizer is a new kind of adjustable stabilizer for well drilling. The adjustable stabilizer pushes out its piston by the drilling pressure to adjust its diameter. When drilling or lifting the drilling tools, its piston will retract automatically to prevent blockage or jamming phenomenon. Because of simple structure, good abrasion resistance, and wider adjustable diameter range. The stabilizer can be using to expand the hole, especially suitable for directional drilling and horizontal drilling.

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