Hardbanding and its applications in the World Petroleum Industry

Hardbanding has long been recognized as an effective means of preventing wear and tear joints, their joints and ends of medium thickness are welded with hard bands. During the 1990s, hardbanding based on tungsten carbide was in wide use and was determined to be the main cause of casing wear. However, the absence of hardbanding, although delaying the wear of the casing, allowed joints to wear out at an accelerated rate. The challenge was to discover a balanced and simultaneously effective solution to defend against the wear of the casing and the protection of the union. Previous casing-friendly alloys reduced casing wear, but resulted in unacceptable joint wear as a result. There were also design flaws that caused cracks as it showed the extended cracking of the alloy material. This caused catastrophic failures in the joints and, in some cases, even failure in the hardbanding, due to the spalling of the joints. Industry solutions include:

• Low casing wear determined by the Mohr test T-95.

• Highly durable and resistant to wear, protecting the union.

• Resistant to cracks, prevents cracks in the material and the union.

• Metallurgical compatibility resistant to chipping

• Material is easy to re-apply without special preparation nor previous conditioning.

Since then, the drilling industry has become increasingly complex, requiring the need for more advanced alloys that cover a spectrum of high durability hard wearing needs, low casing wear, ease of use and compatibility with other hardbanding materials in the countryside. Competitive shielding products must now be able to protect the drilling and coating components, but also withstand the extreme pressures and temperatures experienced in critical wells today.

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