Novel hydraulic piston sampling machine tool

Abstract

The invention discloses a novel hydraulic piston sampling machine tool. A piston drill bit is in screwed connection with the lower end of a hollow core rod. The upper end of the hollow core rod is in screwed connection with the lower end of an upper piston. The upper end of the upper piston is in screwed connection with the lower end of a main shaft. The main shaft is of a driving drill pipe structure which is in a hexagonal prism shape or flat. A torque transmission connector is arranged on the main shaft in a sleeved mode and can move in the axial direction of the main shaft relative to the main shaft. The torque transmission connector and the main shaft rotate synchronously together. The lower end of the torque transmission connector is in screwed connection with the upper end of a hydraulic cylinder body. The inner diameter of the torque transmission connector is larger than that of the hydraulic cylinder body. An inner cavity of the cylinder body is matched with the upper piston in a sliding and sealing mode. The lower end of the cylinder body is in screwed connection with the upper end of a movable piston. The lower end of the movable piston is in spline fit with the upper end of a taper sleeve, connected and limited through screws. The lower end of the taper sleeve is in spline fit with the upper end of an outer tube and connected and limited through screws. The lower end of the outer tube is in screwed connection with an outer drill bit. Static pressure sampling, static pressure + rotation sampling and impact sampling are achieved. The pumping effect of the bottom of a hole when a drill tool is lifted is eliminated. Hidden danger of dropping of samples when the drill tool is lifted is eliminated, and the novel hydraulic piston sampling machine tool has the advantages of being high in reliability of sampling and high in adaptability to formation conditions.

Description

technical field [0001] The invention relates to a water area sampling drilling tool for geological sampling, chemical exploration sampling and environmental sampling in rivers, rivers, lakes and lakes, in particular to a new hydraulic piston sampling tool with high reliability. Background technique [0002] Piston drills are an effective method to obtain muddy sediments in water areas, but traditional piston drills have the following disadvantages: [0003] 1. The drilling function is single, mainly relying on static pressure to pour into the formation, and when the formation conditions change, the use will be limited; [0004] 2. The lifting drill is sucked in the hole, and the pulling force is too large; [0005] 3. There is no heart protection mechanism, which may easily cause the sample to fall off. Contents of the invention [0006] Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide a new type of hydraulic piston sampling...

AI Technical Summary

Problems solved by technology

[0003] 1. The drilling function is single, mainly relying on static pressure to pour into the formation, and when the formation conditions change, the use will be limited;

[0004] 2. The lifting drill is sucked in the hole, and the pulling force is too large;

[0005] 3. There is no heart protection mechanism, which may easily cause the sample to fall off

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