Hot-water driven self-rotation ice-layer coring and drilling method and device

Abstract

The invention discloses a hot-water driven self-rotation ice-layer coring and drilling method and device. According to the method, hot water is adopted as a power medium to drive a downhole drilling tool to rotate to complete coring and drilling, a swirl injector principle is adopted, through a current guiding channel designed in a drill bit, the hot water is guided to erupt from the side wall of the drill bit, a counterforce of the hot water drives the drill bit rotate, so that ice layers are cut, and the drilling is completed. The device includes a hot water pipe, a cable, a cable terminal, a grounding detection mechanism, a water diversion joint, an upper centering guide, an electric cabin, a lower centering guide, a transition pipe, a lower-portion dual-tube drilling tool and a lower-portion self-rotation drill bit. According to the method and device, the swirl injector principle is applied to downhole detritus, and rapid polar ice-layer coring and drilling can be achieved; a heat-machine mixed method is adopted to conduct sampling and the drilling, the hot water not only provides downhole power for the downhole drilling tool but also brings flake ice generated by the drilling out of hole bottoms and melts the flake ice, and the drilling efficiency and service life of the downhole power drilling tool are improved.

Description

technical field [0001] The invention relates to a drilling method and device for self-rotating ice layer core drilling driven by hot water. Background technique [0002] The Antarctic ice cap contains a large number of micro-organisms, micro-animal and plant limbs, particles from volcanic eruptions, nuclear dust from nuclear explosions, and all kinds of dust from the atmosphere. Since the Antarctic ice core directly records the composition of the atmosphere in ancient times, it contains precious paleoclimate and paleoenvironmental information. Finding ancient ice cores is of great significance for reconstructing the historical evolution of the earth and predicting the evolution of the global climate and environment. Therefore, countries all over the world are currently racing to find ancient deep ice cores in Antarctica. At present, the commonly used deep ice core drilling methods are mostly armored cable electromechanical core drilling methods. This method has the advantag...

AI Technical Summary

Problems solved by technology

At present, the commonly used deep ice core drilling methods are mostly armored cable electromechanical core drilling methods. This method has the advantages of low power and light weight, but there are many surface auxiliary operations, long drilling period and low drilling efficiency. It takes several years or even more than ten years to complete an ice hole drilling, which cannot meet the increasing scientific research needs of scientists. Therefore, it is urgent to develop a method that can quickly complete ice core drilling.

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