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.

Active Publication Date: 2012-09-05
CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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

Method used

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  • Positive pressure jet spiral sampling drill
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  • Positive pressure jet spiral sampling drill

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Embodiment Construction

[0014] figure 1 It is a structural sectional view of the present invention; figure 2 It is a structural sectional view of the annular nozzle injector of the present invention. As shown in the figure, a positive pressure injection spiral sampling drill bit includes a sampling drill bit 1, a screw pump 2, an injector 3 and a joint outer sleeve 4 from front to back; the screw pump includes a rotor 21 and a stator 22, and the rotor 21 The front end is fixedly connected with the sampling drill bit 1, and the front end of the stator 22 is provided with a reaming drill bit 22a; both the rotor 21 and the stator 22 of the screw pump are fixedly connected with the front end of the joint outer sleeve 4, and the injector 3 is arranged in the joint outer sleeve 4. The pump 2 communicates with the central through hole of the injector, and an annular passage I5 is formed between the injector and the pipe wall of the joint outer sleeve, and a gas injection hole is arranged between the centr...

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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.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B10/44E21B10/60E21B10/42E21F7/00
Inventor 胡千庭文光才隆清明康建宁邹银辉韩承强李秋林吴教琨张淑同雷红艳吕贵春张庆华生凯凯刘胜任文贤王艺树
Owner CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
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