A multi-rod deep sampler sampling drilling tool with a coring tube

Abstract

The invention discloses a sampling drilling tool with a coring tube of a multi-rod deep sampler. The sampling drilling tool comprises a drill pipe, the coring tube and a drill tool butt joint component, wherein the drill tool butt joint component comprises a force transmission joint, a coring tube butt joint, a drill pipe butt joint and a butt joint spring, the coring tube is of a thin-wall cylindrical structure, the inner wall of the coring tube is a smooth equal diameter cylinder, anti-falling covers are respectively installed at the bottom and the top of the inner wall, samples enter from the anti-falling covers, the anti-falling covers prevent the samples from falling; the interior of the drill pipe is a cylindrical cavity, a cylindrical cavity is arranged at the lower end of the top end joint of the drill pipe, two symmetrical grooves are axially formed in the cavity, the upper section of the joint is conical, the top of the cone is a circular bead, two symmetrical bulges are arranged in the cylindrical cavity at the bottom end of the drill pipe and are matched with symmetrical grooves of the top joint of other drill pipe, and the bottom end of one drill pipe is locked together with the top end of other drill pipe through a steel ball. By adopting the manner of butt joint by multiple drilling tools, the sampling drilling tool realizes deep sampling, and each drilling tool can be reused.

Description

technical field [0001] The invention relates to a sampling drilling tool for a multi-rod deep layer sampler with a core pipe, and belongs to the technical field of space resource detection. Background technique [0002] Since the former Soviet Union began to explore deep space in the 1960s, the ability to detect alien planets has become an important manifestation of a country's strength and technological level. The United States and the former Soviet Union have successfully sampled and returned lunar soil as early as the 1960s and 1970s. Today, the American "Voyager" 1 has flown 40,000 distances from the earth to the moon and reached the edge of the solar system; at the same time, Japan's Hayabusa probe successfully sampled an asteroid and returned it to Earth. my country's deep space exploration "Chang'e Project" has just started. According to my country's lunar exploration plan, the lunar exploration project is divided into three strategic stages of "circling", "falling" ...

AI Technical Summary

Problems solved by technology

The existing multi-rod sampler drilling tool structure has high requirements on the position accuracy of the two drilling tools when they are docked. If the drilling tool that has entered the alien planet soil is separated from the joint, if the drilling hole collapses or the drill is buried, it will be very difficult. It is possible to change the position of the drilling tool, which is unpredictable for the flow design of the sampler. Therefore, when the joint drives the new drilling tool to the drilling position for docking, it is very likely that the docking will not be connected due to the deviation of the position. , it is not even possible to retrieve the drill bit already in the soil

Moreover, whether it is a single-rod sampler or a multi-rod sampler, the sampling volume of the drilling tool is limited by the drill pipe, and the samples obtained by the sampler are stored in the drilling tool. If the sample volume of the drill is increased, the number of drilling tools must be increased on the basis of the original structure or the structure of the drilling tool must be changed to increase the central volume of the drilling tool

Due to the requirements of the working characteristics of the drilling tool, it is relatively heavy, so the ratio of the sample volume of the increased sampler to the increased weight of the sampler is small, so the cost of increasing the sample volume is high

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