Laser coring drilling method and drilling apparatus for ice layer probing

Abstract

The invention discloses a laser coring drilling method and drilling apparatus for ice layer probing. The laser coring drilling method is a physical icebreaking method of non-mechanical contact type, specifically, a high energy laser beam is used to perform direct action on an ice surface and a local ice surface is heated rapidly to melt. The laser coring drilling method comprises the steps that with the rotation of a laser probe, the laser beam is directly contacted with an ice layer, an annular gap can be formed, a drilling rod is smoothly transferred to a lower level, after the drilling of around trip is finished, ice core cutting devices are used for cutting an ice core under the cooperation of steel wire ropes, and the ice core is taken to the ground surface, so that following work ofice detection and analysis is convenient to finish. The complicated process of mechanical drilling is omitted by using a laser high-energy ice-melt method, and the pollution to polar region environment is reduced without drilling fluid, bit freezing accidents are avoided, and meanwhile, the influence caused in the process of hot water drilling on the ice core shape is further avoided, and the laser coring drilling method is extremely clean ice core original shape keeping drilling method. The laser drilling method further ensures the verticality of drilling holes, an inclined hole is not generated, and the drilling apparatus is used for realizing the method.

Description

technical field [0001] The invention relates to a drilling method and a drilling device for ice layer coring. The method utilizes the energy of a laser beam to rapidly melt the ice core, and recovers the cut ice core through a designed coring device. Background technique [0002] Compared with conventional drilling methods, laser drilling is a clean drilling method. It uses high-energy laser beams to directly act on the ice surface to make it locally heated and melted quickly. It is a non-mechanical contact physical ice-breaking method. Since the end of the 1960s, the National Science Foundation of the United States has launched a huge research program to find efficient drilling methods, and has studied 25 new drilling methods such as electron beams, lasers, and water jets. Laser drilling technology has developed rapidly with the advantages of high speed, low cost, high efficiency, high safety and low damage. So far, although domestic and foreign researches have involved la...

AI Technical Summary

Problems solved by technology

So far, although domestic and foreign researches have involved laser melting ice, no great progress has been made in laser ice core drilling.

Images