A seabed shallow non-diagenetic natural gas hydrate pilot hole pull-back jet mining method and mining device
A mining method and hydrate technology, which are applied in the fields of mining minerals, mining fluids, and earthwork drilling, etc., can solve the problems of lack of implementation process methods, difficulty in ensuring the economical efficiency of hydrates, and being in a suspended state, so as to reduce the technical difficulty of conveying and reduce the cost of transportation. The effect of conveying energy consumption, avoiding geological and environmental disasters, and avoiding engineering geological disasters
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[0018] Typical embodiments embodying the features of the present invention will be set forth in detail in the following description. It should be noted that the present invention can have different changes in different embodiments, and this embodiment and the accompanying drawings are only for illustration, and are not intended to limit the present invention.
[0019] The pilot hole pull-back jet mining method for non-diagenetic natural gas hydrate in the shallow layer of the seabed according to the embodiment of the present invention includes the following steps:
[0020] Step S1: Lower the water-resisting conduit to the top of the seabed hydrate layer to form a vertical channel, and use the intelligent drilling robot 10 to drill horizontally in the hydrate layer to form a certain length of horizontal pilot hole;
[0021] Step S2: Pull back the composite intelligent drilling robot 10, and at the same time, use the water jet to expand the diameter to break the hydrate ore body...
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