시추기 마스트 프레임의 대형화에 따른 용접강도에 관한 연구

Abstract

The drilling equipment of Hanjin D&B is manufactured in various forms such as hot spring, ground water, architecture, civil engineering, coal mine, gold mine. It has been used in many countries around the world, and it is expected that demand will continue to be steadily rising in the drilling market based on the potential demand of developing countries.

Based on the technology accumulated for about 20 years in the field of drilling equipment, Hanjin D&B is actively engaged in drilling industry both in Korea and overseas. The sale of equipment is also continuing. However, demand in the global drilling market does not increase and demand is generated in the existing market. Therefore, it is not significantly lower or higher than existing earnings. Hanjin D&B is committed to technology development in the drilling market. However, due to limitations in profitability, it is difficult to pursue technology development. Thus, Hanjin D&B sought another profitable alternative.

HANJIN D&B Water Hammer for deep drilling has improved dramatically through the accumulation of technology over the last 20 years, but it lacks equipment manpower and skills. To drill deeper into the ground requires a lot of time and skill because the body size of the equipment must be much larger. When the size of the frame structure is increased and the core drill head and water hammer are applied, it is similar to that of existing equipment. It can also generate high profits. However, since the evaluation of the integrity of the welded part of the frame structure is most important, various welding tests are required before the fabrication of medium and large equipment. Therefore, weld integrity was evaluated in this paper through non-destructive testing and mechanical testing.