Water inrush and blowout prevention device and method for limestone directional water exploration and drainage long drill hole
A blowout prevention device and water detection and discharge technology are applied in the direction of wellbore/well valve device, earthwork drilling and production, wellbore/well parts, etc., which can solve the problems of inability to adapt, so as to prevent water inrush from drilling and avoid gas instantaneous Good effect of gush and separation effect
Pending Publication Date: 2022-08-05
HUAINAN MINING IND GRP
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Problems solved by technology
Existing gas blowout preventers cannot adapt to the simultaneous occurrence of gas blowout holes
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[0025] In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are part of the present invention. examples, but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0026] like figure 1 As shown, the embodiment of the present invention discloses a water inrush prevention and blowout prevention device for a long borehole of limestone directional exploration and drainage, including an orifice pipe 1, a high-pressure gate valve 2, a back pressure device 3, and a drainage system.
[0027] The extraction system includes an orifice mult...
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The invention discloses a limestone directional water exploration and drainage long drill hole water inrush prevention and blowout prevention device and method, and relates to the field of gas blowout prevention devices. The device comprises an orifice pipe, a high-pressure gate valve, a back pressure device and an extraction system; the orifice pipe, the high-pressure gate valve, the back pressure device and the extraction system are fixedly connected in sequence, and a drill rod slip is arranged in the back pressure device. The device has the advantages that when water bursting or hole spraying occurs, the high-pressure gate valve and the back pressure device are closed, water and slag carry gas to sequentially pass through a gap between the high-pressure gate valve and the drill rod and a small gap between the inner side face of a drill rod slip and the outer surface of the drill rod, and the back pressure device makes up the defect that the gap between the high-pressure gate valve and the drill rod is large; the effects of controlling the water inrush amount and guaranteeing slow release of gas are achieved, water inrush of the drill hole can be prevented, and gas can be prevented from instantly gushing out.
Description
technical field [0001] The invention relates to the field of gas blowout prevention devices, in particular to a water inrush prevention and blowout prevention device and method for long boreholes for directional exploration and release of water in limestone. Background technique [0002] At present, long boreholes for directional exploration and drainage of limestone have become an important and widely used method for verifying the effect of water damage control in coal floor limestone areas. Most of the long boreholes for directional exploration and drainage of limestone are downward boreholes. During the construction process, the risk of water inrush and gas injection holes is high, and water inrush often occurs simultaneously with gas injection holes. Conventional gas blowout prevention devices are difficult to adapt to such complexities. Case. [0003] The patent document with the publication number CN215804507U discloses a blowout prevention device for gas control dril...
Claims
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IPC IPC(8): E21B43/18E21B43/34E21B34/02E21B21/015
CPCE21B43/006E21B43/18E21B43/35E21B34/02E21B21/015
Inventor 丁华忠程合玉刘德贵方有向李世辉周伟东万玉柱张磊魏涛黄礼勇
Owner HUAINAN MINING IND GRP