Mud pump cylinder sleeve
The mud pump is the “heart” of the oilfield drilling system, and the mud pump cylinder sleeve is an important easily wear component of the mud pump pump liquid. Therefore, the life of the mud pumping cylinder can directly affect the life of the mud pump. Due to the contact with high temperature and high -pressure gas, the piston ring has a high speed movement on its surface. damage.
Classification
The following types of common mud pump cylinder suits: single metal cylinder, dual metal cylinder, ceramic cylinder cover, nickel -based alloy cylinder set.
Single metal cylinder
After carburizing and high-frequency treatment, the hardness can reach HRC58-62, which has the characteristics of high smoothness, abrasion resistance, corrosion resistance, and long service life, which is suitable for use in mild and corrosive mud.
Dual metal cylinder
The dual -metal cylinder set is one of the most widely used and the largest mud pumping liquid -end accessories. The two -metal cylinder set combined with the advantages of thermal forging high wear jacket and high chromium wear -resistant anti -corrosion inner sleeve. The coat is made of high -quality carbon steel heat pressure at once, and the inner cover is cast with high -chromium cast iron centrifugal. The tensile strength of the 900000PSI, after the inner set heat treatment, the hardness reaches HRC62 or more, and can withstand the mud pressure of 7000PSI. The inner surface is smooth as a mirror, the inner hole size tolerance is strict, and the normal service life can reach 800 hours.
Ceramic tank sleeve
With the expansion of human mining scope of global oil and gas resources, and becoming worse, a large number of metal cylinder sets are frequently replaced, it is difficult to ensure the high voltage and wear of the rig’s high pressure and wear. （Rena alumina (ZTA), high-performance A-99 aluminum aluminum ceramic system. Its raw materials are made of high -purity nano oxide and alumina micro powder. It is formed, high -temperature sintering, and assembly with advanced cold pressure process, and finally grinds and polished with high precision. Fracture toughness and acid alkali resistance.
Nickel -based alloy cylinder set
With the continuous advancement of technology, the nickel -based alloy cylinder set made of new materials has been developed. Its process is to cover the alloy material on the inner wall of the cylinder, and the vacuum sintering technology is used to form a 1.5mm alloy sintering layer. The sintering layer is formed. The material is selected from high -performance rare earth nickel -based alloy powder to add a micron -level hard alloy material, so that the micron -level high -wear -resistant hard point is evenly distributed in the sintering layer, effectively improving the overall anti -wear performance of the sintering layer At the same time, due to the small alloy organization and its small, the phenomenon of tissue peeling will not occur. Because the powder forms a good alloy sintering layer, the combined intensity is good, the hardness of the sintering layer has HRC: 60-64.
Compared with double metal materials, high -performance wear -resistant and corrosion -resistant rare earth alloy powder is first based on nickel -based. On the basis of this, trace elements and rare earths such as CR, B, YB, Mn, CU are added. In the substrate, the small, diffuse distributed hard dots such as NIB, CR7C3, CR23C6, etc. are formed in the substrate, which effectively improves the high temperature red hardness and wear resistance and corrosion of the alloy. It has excellent comprehensive performance. Due to the role of YB, MN, CU and other elements The fineness of grains and crystal boundaries, the abrasion resistance of the alloy has been greatly improved, and the resistance of heat resistance and cracking resistance have been improved. At the same time, high -abrasion -resistant alloy materials also make the use of coating Life is more than 2000 hours, up to 4,000 hours, which is 5-10 times the ordinary metal cylinder set, which is comparable to the ceramic cylinder. The abrasion resistance, high temperature resistance, high strength, high hardness, not easy to damage, the price is far lower than the ceramic cylinder sleeve. The key is to improve the rhombus mining progress and reduce the costs of drilling, maintenance, manual, storage and other costs.