The Well stabilizers (also known as centralizers) are core tools in oil drilling projects. They are mainly used to control wellbore trajectory, stabilize drilling tools and improve drilling efficiency. Their functions can be specifically divided into the following five aspects:
I. Core function: controlling well inclination and trajectory
1. Directional anti-inclination
The stabilizer constrains the bending deformation of the drill collar by changing its installation position in the drilling tool assembly, forcing the drill bit to drill along the preset wellbore trajectory, effectively preventing the well inclination from exceeding the standard. In directional wells and horizontal wells, it is a key tool for achieving precise trajectory control
2. Mechanical optimization
The weight of the drill collar is concentratedly transferred to the drill bit, reducing the eccentric vibration and lateral load of the drill string, avoiding eccentric wear of the drill bit, and extending the life of the drill bit
II. Auxiliary functions: improving wellbore quality
1. Finishing the well wall
The spiral ribbed belt or roller structure rubs against the well wall continuously, which can scrape irregular protrusions, make the well wall smoother and flatter, and improve the cementing quality
2. Local hole expansion
In the wellbore with reduced diameter or large dogleg, the chamfer design at the lower end of the stabilizer can expand the hole while drilling, reducing the risk of stuck pipe
There are three type of stablizer as below :
- - spiral blade stabilizer
- - straight blade stabilizer
- - non-magnet stabilizer






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