Mother-son drill bit spot sampling device

A technology of fixed-point sampling and mother-in-two drill bits, which is applied in the direction of extracting undisturbed core devices, earth cube drilling and mining, etc., can solve problems such as difficult and fast fixed-point sampling, and achieve labor-saving and time-saving technology applicable areas, save time, and save drilling and sampling time Effect

Inactive Publication Date: 2017-11-17
HENAN POLYTECHNIC UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problem that it is difficult to fast fixed-point sampling in the existing sampling technology, the present invention aims to provide a fixed-point coring device for dual-mother drill bits

Method used

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  • Mother-son drill bit spot sampling device
  • Mother-son drill bit spot sampling device
  • Mother-son drill bit spot sampling device

Examples

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Embodiment Construction

[0027] as attached Figure 1-6 As shown, a fixed-point sampling device for a mother-in-law drill includes a coring tube. The coring tube includes an inner tube 9 and an outer tube 8. The core tube adopts a double-wall design of the inner and outer tubes, and the slag discharge medium ( Pressurized water, pressurized air) enters through the annular gap and sprays out from the side of the drill bit, which not only plays the role of cooling the drill bit and discharging drill cuttings, but also avoids the erosion of the coal sample when the medium passes through the sampling core cavity The end of the core pipe is provided with a female drill bit 7, the female drill bit 7 is fixed with drill teeth 12 at intervals, the female drill bit 7 is embedded with a sub-drill bit 1, and the female drill bit 7 is horizontally provided with a non-through female drill bit 7 The pin hole of the sub-drill 1 is horizontally provided with a pin hole through the sub-drill 1, so the pin holes on the...

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Abstract

The invention relates to a mother-son drill bit spot sampling device comprising a coring pipe, and the coring pipe comprises an inner cylinder and an outer cylinder; the end portion of the coring pipe is provided with a mother drill bit, drill teeth are fixedly installed on the mother drill bit at an interval, a son drill bit is embedded into the mother drill bit, and the mother drill bit is connected with the son drill bit through a locking device; the locking device comprises a locking latch, a baffle plate and a draw bar, the locking latch is arranged in pin holes in the mother drill bit and the son drill bit in a penetrating manner, the baffle plate is connected with the draw bar through a pin, the exterior of the locking latch is sleeved by a latch spring, and the upper end of the draw bar is arranged in the bottom of the son drill bit in a penetrating manner. The mother-son drill bit spot coring device takes fast spot sampling required by coal seam gas extraction effect examination as the technical condition, the mother and son drill bits are locked and drill in a linked manner when sampling is not carried out, an unlocking device is started when a predetermined sampling position is reached, the mother drill bit takes samples in the manner of a sampling pipe, time is saved, positioning is accurate and sample mixing can be avoided, and the aim of fast spot sampling is achieved.

Description

technical field [0001] The invention belongs to the safety technical field of coal mine gas outburst prevention and control, and is mainly used for drilling sampling when coal seam gas drainage and outburst prevention effect up-to-standard inspection, and specifically relates to a fixed-point coring device and method for a mother-in-two drill bit. Background technique [0002] my country's high gas mines and outburst mines account for about 48% of the total number of mines. my country's "Coal Mine Safety Regulations" and "Regulations on the Prevention and Control of Coal and Gas Outbursts" require that high gas mines must conduct gas drainage from coal seams before and during mining. , and the mining can only be done after the extraction reaches the standard. Outburst mines require large-scale gas pre-pumping in coal seam areas with outburst risks, and mining operations can only be carried out after the pre-pumping effect is up to standard. Whether it is a high-gas mine or a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B25/00
CPCE21B25/00
Inventor 杨宏民任发科王彬王兆丰梁龙辉袁军伟裴冠朕刘军陈向军
Owner HENAN POLYTECHNIC UNIV
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