Steel-aluminum gradient composite material drilling rod and preparation method thereof

• Main Authors: WANG HUIYUAN, CAO WENKANG, CHANG SI, TU JIANBO, XIONG HONGWEI, ZHANG HECHUAN, MA YINLONG, XU SHAOTAO
• Format: Patent
• Language: Chinese; English
• Published: 13.07.2018
• Subjects: ADDITIVE MANUFACTURING TECHNOLOGY; ADDITIVE MANUFACTURING, i.e. MANUFACTURING OFTHREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVEAGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING,STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING; CASTING; EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING; WORKING METALLIC POWDER

The invention discloses a steel-aluminum gradient composite material drilling rod and a preparation method thereof. The drilling rod is designed to be of an inner-outer double-layer structure. An outer layer and a connector of the drilling rod are made of steel, and an inner layer of the drilling rod is made of an aluminum alloy. Steel and aluminum alloy interfaces are combined through a transitional layer, changed according to the proportional gradient, of the steel and aluminum alloy interfaces. The drilling rod combines the advantages of strength, abrasion resistance, high-temperature resistance and corrosion resistance of the steel and the small weight of an aluminum alloy material, and the requirement of deep exploitation equipment development is met. The connector of the drilling rodis made of a steel material, the problem that a regular aluminum alloy drilling rod and a steel connector are dissimilar metal and thus are hard to assemble is solved, meanwhile the design of the independent connector can be