A closed sampling device for directional long borehole drilling
CN224286430UActive Publication Date: 2026-05-26HENAN POLYTECHNIC UNIV
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HENAN POLYTECHNIC UNIV
- Filing Date
- 2025-07-18
- Publication Date
- 2026-05-26
AI Technical Summary
Technical Problem
Existing coal seam gas content measuring devices are complex in structure, inconvenient to operate, and costly, making it difficult to perform efficient closed sampling.
Method used
By replacing the multi-tube structure with a piston assembly and a circular slider, sampling is achieved through initial low-pressure water introduction and high-pressure water impact, which simplifies the device structure and improves sampling efficiency.
Benefits of technology
It achieves coal seam gas sampling that is simple in structure, easy to operate, and airtight and reliable, reducing production costs and improving sampling efficiency.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN224286430U_ABST
Abstract
This utility model discloses a closed sampling device for directional long borehole drilling, including a drill bit, a plurality of cutting edges at the left end of the drill bit, a drill shank at the right end of the drill bit, a first water supply channel inside the drill shank, a plurality of sampling holes on the outer surface of the drill shank connected to the water supply channel, and a water outlet channel inside the drill bit. The first water supply channel and the water outlet channel are interconnected. A piston assembly is slidably disposed in the first water supply channel through an elastic connector. A circular slider is also disposed in the first water supply channel, located on the right side of the piston assembly. A second water supply channel is disposed at the center of the piston assembly. This application replaces the original multi-tube structure with a corresponding piston assembly and a circular slider, which simplifies the structure and effectively improves the sampling efficiency. In specific sampling, only low-pressure water needs to be replaced with high-pressure water to complete the sampling, effectively solving the technical problems of complex structure and time-consuming and labor-intensive operation of existing closed sampling devices.
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