A, centralizer profile
Centralizer cementing tools, it makes simple, structure and beautiful, durable, centering force big, prone to overcome the original welded lifter desoldering, is a kind of centralizer can ensure drilling cementing quality.
Centralizer sort is various, according to the structure can be divided into the roller, the sliding block type, automatic reversing type, etc. Different structure and material of centralizer, applicable to different types of eccentric wear oil well. Use the centralizer eccentric wear prevention, centralizer is the most critical installation location, spacing, and number.
Second, use the centralizer
Because of the complexity of the oil well itself well conditions, make in the production process of rod-pumped well the following question.
1, the sucker rod eccentric wear: the partial grinding rod, can reduce the production efficiency of pumping Wells, increase production into this.
2, low pump efficiency: due to eccentric wear the friction increases the stroke and increasing the pumping unit load, increased energy consumption, the stroke loss is big, pump efficiency is low;
3, increase with the water content of the liquid, causes the liquid proportion increase, such making that the load of pump and leakage increase pump efficiency is reduced.
Three, centralizer principle
Centralizer is applied in the oil field pumping unit well drilling tools, is to improve pump pump efficiency of a new type of products. Is to use the slide valve automatic open and close structure, the connection on the sucker rod, when sucker rod downstroke, slide valve uplink open up on the traditional oil duct, sucker rod on the trip, downward slide valve closed up on the traditional oil. Thus by piecewise lifting liquid column, block to reduce the load on the sucker rod and pump load, reduce the pump leakage, reduce elastic extension deformation of sucker rod, reducing the loss of stroke, so as to improve the effective stroke of the pump, increase the pump barrel filling quantity, improve the pump efficiency.
Four, centralizer install and use
1, the stroke loss minimum principle
According to the combination of the sucker rod, try to reduce the elongation of the longest rod load, suggested that every 1000 meters pump installation of this product 4-10.
2, according to the oil
This product because of the structure of the slide valve open and close automatically, can avoid ontology scaling wax, but avoid wax precipitation point as far as possible when installing this product. (use the factory production of liquid viscosity against the la increased centralizer can prevent this happening)
3, according to the curvature of Wells
This product should be appropriately increased in oil well eccentric wear serious place installation density, can play a better role of the anchorage rod.
4, pay attention to the product as far as possible to avoid the tubing coupling.