In oil extraction lifting systems, the performance of spiral sucker rod centralizer is determined by the structural design. A high-quality spiral sucker rod centralizer needs to take into account the convenience of installation, adaptability to working conditions and durability through a scientific combination of components. Dongsheng Petroleum has extensive experience in the structural adjustment of spiral sucker rod centralizer. We will take you to understand the mystery of its structure from the three aspects of core components, material logic, and adaptation advantages.
Ⅰ. The three core components of spiral sucker rod centralizer：
1. Core rod：
The core rod is the core load-bearing component of spiral sucker rod centralizer. It is responsible for connecting the sucker rod body and other components to withstand the lateral force and impact of reciprocating movement and prevent the equipment from deformation and fracture. Our cylindrical spiral sucker rod centralizer uses alloy steel as the core rod. After quenching and tempering treatment, the strength and toughness are improved, and it can be adapted to a variety of specifications of sucker rods without separate customization.
The surface of the core rod has also been treated with anti-corrosion treatment, which can be used stably in acidic wells to avoid the failure of spiral sucker rod centralizer caused by corrosion; The precise threaded structure at both ends is adapted to the lock mother, and the sucker rod lock block can be tightly fitted during installation to prevent loosening.
2. Righting set：
The righting sleeve is the key component of the spiral sucker rod centralizer in contact with the inner wall of the tubing. It needs to meet the needs of low friction, high wear resistance, and wide adaptability. The material and structure design are fine：
Metal spray welding righting sleeve: based on high-quality steel, the surface is sprayed with a wear-resistant alloy layer, which has strong wear resistance, is suitable for high sand content and high corrosion well conditions, and can reduce frictional resistance after polishing.
Nylon righting sleeve: Made of reinforced nylon, the coefficient of friction is much lower than that of metal, it is suitable for shallow and medium-sized wells and low-sand wells, and it is flexible, can adapt to irregular borehole conditions, and protect the oil pipe.
Our columnar spiral sucker rod centralizer righting sleeve adopts spiral groove + large sand sinking channel design: the spiral groove reduces the contact area and guides the flow of crude oil, and the large sand sinking channel avoids the accumulation of sand particles to form a “sand bridge” to prevent sand from getting stuck.
3. Lock mother：
The lock female is used to fix the spiral sucker rod centralizer on the sucker rod body to prevent high-frequency movement from causing displacement. The traditional single lock female is easy to loose. Our spiral sucker rod centralizer uses a double lock female + anti-loosening thread. The inner lock female fits the lock block, and the outer side is tightened in reverse to form a “two way lock” to ensure that it will not move.
The lock mother is made of high strength alloy steel, the hardness is improved after heat treatment, and the thread is not easy to slip; The elastic oil resistant rubber gasket on the inside can enhance the sealing and anti skid properties, and avoid problems caused by crude oil and sand particles entering the gap.
Ⅱ. Adaptation advantages of structural design：
The structure of spiral sucker rod centralizer needs to be adapted to different well conditions：
Inclined and horizontal wells: Elastic nylon righting sleeve + spiral groove, adaptive borehole trajectory, reduce caton.
High sand-containing well: metal spray welding righting sleeve + large sand-sinking channel, wear-resistant and sand-proof, prolong life.
Acid well: Anti-corrosion core rod + metal spray welding righting sleeve, strong corrosion resistance.
Dongsheng Petroleum's spiral sucker rod centralizer has been tested and verified in detail and has passed international certification. If you need to customize the structural parameters, we can provide technical support to ensure that the equipment matches the mining needs and escorts the stable production of the oilfield.