Blowout control device for water detecting and draining drill hole

Abstract

The invention discloses a blowout control device for a water detecting and draining drill hole, which adopts the structure that a lower flange plate, connected with a fixed borehole wall casing pipe, is arranged at the bottom of a cylindrical housing and is provided with an internal flange; an upper flange plate is arranged at the upper part of the housing; an internal flange is arranged at the middle part of the housing; the upper part of the housing is sleeved with a T-shaped pressing flange, and the T-shaped pressing flange is connected with the upper flange plate of the housing through bolts; the inside diameters of the T-shaped pressing flange and the internal flanges respectively at the middle part of the housing and at the lower flange plate, are slightly larger than the diameter of a drill rod; threaded holes, in which jackscrews are screwed, are symmetrically formed in the housing wall below the internal flange at the middle part of the housing; slips are mounted in the internal end head parts of the jackscrews; a water drainage pipe, communicated with a cavity of the housing and provided with a stop valve, is arranged at the housing wall below the internal flange at the middle part of the housing; sealing materials are filled in the gap between the internal flange at the middle part of the housing and the pressing flange; the housing and the sealing materials can bear pressure not less than 10 MPa. The blowout control device can avoid lifting of the drill rod, and has a water draining function.

Description

Technical field [0001] The invention designs a coal mine drilling safety tooling, especially a blowout prevention device for water exploration and drainage drilling. Background technique [0002] As we all know, drill pipe ejection and water spraying have hidden safety hazards in coal mine construction. However, the current safety tooling for underground construction in coal mines can only function to prevent the drill pipe from being ejected, and has no drainage function. Therefore, a water-exploring and drilling blowout prevention device that has the functions of preventing drill pipe ejection and drainage is designed. It is a technical problem that needs to be resolved at present. Summary of the invention [0003] The technical problem to be solved by the present invention is to provide a blowout prevention device for water exploration and release drilling that has the functions of preventing drill rod ejection and drainage. [0004] The technical solution of the present invent...

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Problems solved by technology

[0002] As we all know, drill pipe ejection and water injection are potential safety hazards in coal mine construction

However, the current safety tooling for underground construction in coal mines can only prevent the drill pipe from being ejected, and has no drainage function. Therefore, a blowout preventer for detecting and releasing water is designed to prevent the drill pipe from ejecting and draining the water at the same time. It is a technical problem that needs to be solved at present

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