One-piece centralizer is an important tool used in oil, gas and geological exploration drilling engineering, and its main function is to stabilize the downhole drilling tool and prevent the change of well deviation It keeps the slender drill pipe running smoothly and keeps the drill bit axis as close to the drill hole centerline as possible, thereby reducing the eccentric wear of the drill bit and drill pipe, ensuring the quality of coring, and preventing well deviation or being used for manual directional drilling.
The integral centralizer is made of 65Mn seamless steel pipe, which is then adjusted and shaped by stamping and heat treatment. It is widely used in the casing running operation of vertical wells or large inclination wells, and has the advantages of small starting force and large reset force.
If the one piece centralizer ( also called semi-rigid centralizer) integrate with the stop ring, then the centralizer has the role of high strength of the integral centralizer and the fixation of the stop ring at the same time. It is easy to install and can save the cost of the stop rings.
