Positive pressure jet spiral sampling drill

A sampling drill bit and screw technology, applied in drill bits, drilling equipment, earthwork drilling and other directions, can solve the problems of complex process, long sampling time, hindering the production efficiency of coal seams, etc., and achieve the effect of good continuity and simplified sampling process.
CN101963043BActive Publication Date: 2012-09-05CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
Publication Date
2012-09-05

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Abstract

The invention provides a positive pressure jet spiral sampling drill, which sequentially comprises a sampling drill, a spiral pump, an ejector and a joint outer sleeve from front to back. Materials are fed in a mode of matching the spiral pump with the ejector of the positive pressure jet spiral sampling drill, so that the requirement on the deep sampling of a coal bed can be met; meanwhile, the spiral pump and the ejector are integrated, air flow control when the cold bed is sampled by a small-diameter drill and reasonable solid-gas ratio in a drill pipe are matched by controlling the feeding speed of the spiral pump, the size of a jet hole of the ejector and compressed air pressure, so that the coherence of the sampling process is high, the drill pipe is prevented from being blocked by the materials and the sampling process is convenient and quick; in addition, intake air of a dual-wall drill pipe is controlled in the normal drilling process as required and sampling is performed at any time, so that arbitrary and accurate positioning is realized.
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Description

technical field

[0001] The invention relates to a sampling drill bit, in particular to a sampling drill bit for deep-hole coal seams. Background technique

[0002] At present, the management of coal mine gas disasters is mainly based on regional prevention and control, supplemented by local measures. The rapid measurement technology of regional gas parameters has become an urgent problem to be solved. Therefore, deep hole sampling is the primary problem that needs to be solved. At present, the sampling methods of deep gas mainly include: core tube sampling, auger drilling to connect pulverized coal, compressed air injection sampling, etc. These sampling methods have the problems of complicated process, long sampling time and inability to sample at fixed points, which seriously hinder The production efficiency of coal seam mining restricts the development of productivity.

[0003] In view of the above deficiencies, it is necessary to develop a new deep hole gas sampling dril...

Claims

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