A wireline core drilling tool

Abstract

The invention discloses a wire core drilling tool which comprises an inner pipe assembly and an outer pipe assembly. A blockage notifying mechanism comprises a pull rod and an alarming rubber ring fixed on the pull rod, a conical pad and a sliding sleeve connected on the pull rod in a sleeved manner are arranged at the lower end of the alarming rubber ring, the conical pad comprises an annular extrusion portion and a conical portion, the upper end of the annular extrusion portion is matched with the alarming rubber ring for extrusion, the conical portion is arranged at the lower end to protect the sliding sleeve, the upper end of the sliding sleeve and the conical pad are rotatably connected through a bearing, a clamping block is arranged on the lower portion of the pull rod, a buffering spring is connected between the clamping block and the sliding sleeve in a clamped manner and connected on the pull rod in a sleeved manner, a buffering spring sleeve is arranged outside the buffering spring, and the lower end of the buffering spring sleeve is connected with an inner pipe. The blockage notifying mechanism of the drilling tool is simplified, so that structure of the drilling tool is simplified greatly, and the drilling tool is enabled to be convenient to maintain, reliable to use and high in practicability.

Description

technical field [0001] The invention relates to a rope core drilling tool. Background technique [0002] At present, the wireline core drilling tools commonly used in China have a maximum outer diameter of S95, and those with an outer diameter larger than this are foreign PQ drilling tools (maximum outer diameter is φ122), and there is a gap between 95 and 122. A transitional drilling tool, which can not only make up for the too small diameter of the S95 drilling tool, but also make up for the defect that the PQ drilling tool requires too much power, and provide convenience for water well drilling and coalbed methane exploitation; at the same time, the S95 The wireline coring tool blockage reporting mechanism has a complex structure and is inconvenient to maintain, which is not conducive to improving drilling efficiency and quality. The prior art urgently needs a rope core drilling tool with simple structure, convenient maintenance, reliable use and strong practicability. ...

AI Technical Summary

Problems solved by technology

[0002] At present, the wireline core drilling tools commonly used in China have a maximum outer diameter of S95, and those with an outer diameter larger than this are foreign PQ drilling tools (maximum outer diameter is φ122), and there is a gap between 95 and 122. A transitional drilling tool, which can not only make up for the small diameter of the S95 drilling tool, but also make up for the defect that the PQ drilling tool requires too much power, and provide convenience for water well drilling and coalbed methane exploitation; at the same time, the S95 The wireline core drilling tool plugging reporting mechanism has a complex structure and is inconvenient to maintain, which is not conducive to improving drilling efficiency and quality

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