Flammable ice sampling device

Abstract

The invention discloses a flammable ice sampling device which comprises a rope coring double-pipe structure, wherein the rope coring double-pipe structure comprises an outer pipe assembly and an inner pipe assembly; the outer pipe assembly comprises an outer pipe, a spring stop head, a recovery pipe and a coring drill bit; the spring stop head is installed at the upper end of the recovery pipe; the coring drill bit is installed at the lower end of the outer pipe; the inner pipe assembly comprises an inner pipe, a spear head, a spring, a spring seat, a spring rack, a hanging ring and a breaking device; the spear head is installed in the recovery pipe; the spring is installed on the spring seat and positioned in the spring chamber; the spring seat is installed at the upper end of the spring rack; the bottom of a reed seat is rotatably connected with multiple core protective plates; the multiple core protective plates comprise at least two layers, and the core protective plates at the lower layer are positioned between the adjacent core protective plates at the upper layer; and each core protective plate is eccentrically connected with the reed seat. The flammable ice sampling device disclosed by the invention can improve the tightness of a flammable ice sample, has the advantages of simple structure, strong effectiveness and low production cost and is convenient to use and popularize.

Description

technical field [0001] The invention relates to a sampling device, in particular to a combustible ice sampling device. Background technique [0002] Combustible ice is a common name for gas hydrate. It is estimated that the total amount of organic carbon contained in the world's gas hydrates is equivalent to twice that of known coal, oil and natural gas in the world. The international scientific community predicts that it is the best alternative energy after oil and natural gas. It is one of the new clean energy sources that can be replaced by human beings in the 21st century. The current survey shows that there are a large amount of combustible ice resources stored in the northern slope of the South China Sea, the Nansha Trough, the continental slope of the East China Sea, and Qinghai Province. [0003] The current combustible ice sampling technology is to use a steel semi-combined pipe as the inner pipe and use a single-action double-pipe structure to collect samples. T...

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Problems solved by technology

[0003] The current combustible ice sampling technology is to use a steel semi-combined pipe as the inner pipe and use a single-action double-pipe structure to collect samples. This technology has the following problems: 1. There are no protective measures during the sampling process, and the natural gas in the sample will leak and cannot be measured. 2. The single-action double-pipe technology of the ordinary method takes a long time to drill, which increases the probability of natural gas leakage in the sample; 3. The steel inner pipe is not as cheap as the PVC inner pipe, and cannot be directly sealed and sent to the laboratory , it is necessary to use another sealed tank, which increases the probability of leakage

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