Outline The Characteristics Of The Sucker Rod Centralizer
The sucker rod centralizer is an anti-pumping eccentric downhole tool suitable for eccentric pumping wells. It is especially suitable for pumping wells and directional inclined wells with eccentric wear above and below the sucker rod. The sucker rod is below the neutral point and cooperates with the nylon centralizer on the sucker rod body to prevent the anti-biasing effect. The sucker rod moves up and down in the oil pipe. Due to the elastic deformation of the sucker rod, the rod and the oil pipe wall are prone to friction, and the sucker rod is easily broken off. The sucker rod centralizer has flexibility and is in contact with the inner wall of the oil pipe. Reduce the friction between the rod and the tube and enhance the oil recovery life of the pumping unit. The sucker rod centralizer is composed of a coupling, a righting sleeve and a short section. Connected to the sucker rod, the outer diameter of the righting sleeve is greater than the outer diameter of the sucker rod coupling; the righting sleeve is a high-strength wear-resistant material, which is in contact with the oil pipe to wear the positive body and reduce the wear of the oil pipe, Achieve anti-biasing purposes. The sucker rod centralizer is a downhole tool for anti-sucking rod eccentric wear. It is suitable for eccentric pumping wells, especially for the sucker rod neutral point, the above-mentioned eccentric oil pumping well and directional inclined shaft, sucker rod Below the neutralization point, the anti-biasing effect is better when combined with the nylon centralizer on the sucker rod.
At present, the movement of the sucker rod used in the production of oil wells is divided into two types, one is up and down movement, and the other is rotating motion. When the sucker rod rotates, the sucker rod body and the oil pipe will rub, causing the tubing wall to become thinner, withstand pressure drop, and wear out in severe cases; and, after the rod body and the coupling of the sucker rod are worn, the rod body Damaged, reducing the pulling force and torque of the sucker rod, thereby reducing the service life of the sucker rod, and the phenomenon that the sucker rod is broken, which affects the normal production of the oil well. There are many kinds of existing centralizers, but the central body of the centralizer is mostly integrated structure, which moves with the rotation of the sucker rod, and the wear and tear for a long time is serious, which increases the production cost. Moreover, the edge of the centralizer is easily damaged by the friction of the oil pipe when the sucker rod is down, and the centralizer may be broken into the well when it is severe. Such a centralizer is not suitable for the up and down movement of the sucker rod. Therefore, there is a need for a centralizer that can simultaneously satisfy the movement of the sucker rod up and down and rotation.
First, the sucker rod centralizer has the following characteristics:
(1) The sucker rod centralizer has less damage to the oil pipe wear. After the engineering plastic nylon 66 sucker rod centralizer is used, the frictional pair of the rod tube changes from metal-metal to metal-engineering plastic pair. Although the wear resistance of engineering plastics is not as good as that of oil pipes, it is useful for cherishing oil pipes without tension and wear.
(2) Sucker rod centralizer has excellent mechanical properties.
(3) Excellent self-wear resistance and low coefficient of friction. The area of the righting area is increased, and the wear resistance is increased. If the sucker rod centralizer has a high self-wearing property, the sucker rod centralizer can maintain an excellent righting effect for a long time, and the eccentric wear damage is also reduced to a small extent.
(4) Adopt a unique inner elliptical structure. The sucker rod centralizer is a two-half button type, the righting block A and the righting block B hold the sucker rod to lock the lock after the Chengdu personnel test net, and the sucker rod forces the sucker rod centralizer to control the deformation. The resulting large deformation force makes the sucker rod centralizer sucker rod fit tightly, without axial sliding.
(5) The nylon 66 material is used to process the righting sleeve through the extra-process, which has the characteristics of small friction coefficient, no slag after wear, long service life and low relative cost.
