Application of steel strand in multi-angle drilling and coring process

Abstract

The invention discloses the application of prestressed steel strands in the process of multi-angle drilling and coring. Utilizing the characteristics of high strength and good toughness of the prestressed steel strand, the inner tube of the core will not be deformed or damaged when pushed in the drill pipe, and the prestressed steel strand is quickly lifted by the design of the rolling wheel to complete the extraction of the core without lifting Drill pipe; without changing the prototype structure of the drilling rig, the 360° drilling and coring technology is realized, which completely solves the problems of cumbersome and tiring operations and low efficiency in multi-angle drilling. The application of prestressed steel strands can not only significantly improve the drilling efficiency, but also help to ensure the quality of rock ore coring, reduce drilling costs, greatly reduce labor intensity, and increase drilling benefits.

Description

technical field [0001] The invention belongs to the field of drilling, in particular to the use of prestressed steel strands for 360° rapid coring in drilling, and utilizing the properties of high strength and high toughness of the prestressed steel strands to change the double-pipe coring and ropes in today's multi-angle drilling industry The problem of low efficiency of coring operation. Background technique [0002] Among the drilling equipment at home and abroad, the most ideal, most popular and very mature coring method is rope coring, that is, the use of steel wire ropes. In 1947, the American Longyear Company invented the rope coring drilling technology, and it formed a series in the 1950s; in 1972, China The Ministry of Geology and Mineral Resources began to study the rope core drilling technology, which was popularized and used in China in the early 1980s. Until now, the rope core drilling range has been used in the vertical downward angle. The drilling angle limit...

AI Technical Summary

Problems solved by technology

[0002] Among drilling equipment at home and abroad, the most ideal, popular and mature method of coring is rope coring, that is, the use of steel wire ropes. In 1947, the long-term company in the United States invented the rope core drilling technology, which formed a series in the 1950s; in 1972, China The Ministry of Geology and Mineral Resources began to study the wireline core drilling technology, which was popularized and used in China in the early 1980s. Up to now, the wireline core drilling range has been used in the vertical downward angle, because the inner tube of the core needs to sag to the bottom of the hole by its own gravity, so Unable to exceed drilling angle limits

At the same time, for horizontal drilling, the downhole drilling holes are shallow and have many angles. For example, downhole drilling requires a small space, most of which are 2x2 meter roadways, and rope coring and towers supporting ropes cannot be used. Expanding the underground space is time-consuming, labor-intensive and costly, so this process is basically not used

[0003] Another drilling and coring method adopts the double-tube coring process. This technology was introduced from abroad in the 1950s. To extract the core, it is necessary to raise all the drill pipes. The labor intensity is high and time-consuming. Proposing the drill pipe will also cause no drill pipe support in the hole, causing accidents in the hole such as hole collapse and falling blocks. Causes rock core confusion, rock core self-grinding, rock core recovery rate can not meet the national standard

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