Snap spring seat and inner pipe connecting device of coring drill

A technology for coring drilling tools and connecting devices, which can be applied in the directions of extracting undisturbed core devices and earthwork drilling, etc., and can solve problems such as pulling and breaking.

Active Publication Date: 2015-05-27
EXPLORATION TECH RES INST OF CHINESE ACADEMY OF GEOLOGICAL SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with the threaded connection is: when cutting the core, the connecting thread needs to transmit the pulling-off force of the core. When drilling with large-diameter coring, the thick core generally requires a huge pulling-off force, so it is easy to cause failure due to the threaded connection. and was pulled off

Method used

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  • Snap spring seat and inner pipe connecting device of coring drill
  • Snap spring seat and inner pipe connecting device of coring drill
  • Snap spring seat and inner pipe connecting device of coring drill

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Embodiment Construction

[0017] See figure 1 , The present invention includes a circlip seat 3, an inner tube 1, an outer tube 2, a circlip 4, and a core bit 5. The inner tube is sleeved in the outer tube, the lower part of the outer tube is connected to the core bit, the circlip seat is a hollow structure, and the lower part of the inner tube It is inserted into the upper part of the circlip seat, and the circlip 4 is installed in the circlip seat.

[0018] See Figure 1-3 In order to solve the problem that the ordinary plug-in structure of the inner tube and the circlip seat is easy to fall off, the present invention is provided with an inner cone working surface 3-1 at the upper end of the circlip seat 3. The diameter of the inner cone working surface increases from top to bottom, namely The port is a small mouth end. In order to allow the inner tube to be inserted into the circlip seat, a set of opening grooves are provided on the inner cone working surface, and each opening groove is arranged along...

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Abstract

The invention relates to a snap spring seat and inner pipe connecting device of a coring drill. The snap spring seat and inner pipe connecting device comprises a snap spring seat, and an inner pipe and an outer pipe which are installed in a sleeving manner, wherein the lower part of the outer pipe is connected with a coring drill bit, the lower part of the inner pipe is connected with the snap spring seat in a plugging manner, a snap spring is installed in the snap spring seat, the upper end of the snap spring seat is provided with an inner conical working surface, the diameter of the inner conical working surface is gradually increased from top to bottom, and a group of open slots is formed in the inner conical working surface; an outer conical working surface is arranged on a junction part between the inner pipe and the inner conical working surface, and the outer conical working surface and the inner conical working surface are consistent in taper and inserted in a matching manner. The snap spring seat and inner pipe connecting device of the coring drill is unique in design, solves the long existed problem of a snap spring seat and inner pipe connecting structure of the coring drill, is suitable for different coring drills of different specifications and can be widely applied to relevant connecting parts of other industries.

Description

Technical field [0001] The invention relates to a geological core drilling operation tool, in particular to a connecting device between a coring drill circlip seat and an inner tube, and belongs to the technical field of drilling equipment. Background technique [0002] Core drilling tools are used in the process of geological core drilling. Double-tube core drilling tools or core drilling tools with a three-layer tube inside the inner tube are the main core drilling tools currently used. The circlip seat and the inner tube of the above-mentioned core drill usually adopt a threaded connection or a plug-in fitting connection. Among them, the plug-in fitting connection is mostly used for small-diameter drilling tools. This connection method uses a small interference fit between the inner hole of the circlip seat and the inner tube, and the friction between the inner hole of the circlip seat and the inner tube is used to prevent the circlip The seat slides down to the inner cone of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B25/00
CPCE21B25/00
Inventor 王稳石朱永宜张恒春闫家
Owner EXPLORATION TECH RES INST OF CHINESE ACADEMY OF GEOLOGICAL SCI
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