Control borehole trajectory:The stabilizer mainly plays a guiding and righting role in the BHA.The position of the stabilizer keeps the borehole Angle and borehole curvature within the specified range,and also concentrates most of the weight of the drill collar on the drill bit,reducing the non-borehole force and other external forces on the drill string and drill bit.With the development of stabilizers and the exploitation of horizontal and directional Wells,stabilizers have become an indispensable bottomhole tool in modern well trajectory control technology.
Reaming:in the curved hole or hole diameter,it drilling with the drill string,its lower body and the transition of the chamfer section,playing a certain role in reaming.
Resetting the shaft wall:during the friction contact between the stabilizer and the shaft wall,the shaft wall can be repaired in different degrees to make the shaft wall more smooth and smooth and improve the quality of the shaft.
2.Type of results:
According to the installation position,there are bottomhole type(also known as near bit type)and drill string type.These two types of stabilizers are also known as integral stabilizers.
Bottom hole type:used for deviation prevention or deviation increase when full hole assembly is rotated.The diameter of the working section should be close to the diameter of the drill bit as far as possible,and it is installed close to the drill bit in order to restrain the lateral swing of the drill bit.Its characteristic is both ends are female buckle.