A drilling bit for solid-state fluidized production of natural gas hydrate in deep water and shallow layers
A solid-state fluidized mining and hydrate technology, which is applied to drill bits, drilling equipment, earthwork drilling, etc., can solve the problems of cuttings deposition in horizontal wells and large pieces of cuttings that cannot be fluidized, so as to increase the discharge efficiency and improve the crushing efficiency. The effect of rock efficiency
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[0044] The present invention will be further described below in conjunction with the accompanying drawings.
[0045] Such as Figure 1-16 As shown, a deep-water shallow gas hydrate solid fluidized production drill bit, its overall structure consists of four parts. The first part is the collar hole bit body at the lower part. The collar hole bit body is mainly connected with the reaming bit body through the connecting thread (19) on the top of the lower connecting rod (10). The bottom of the collar hole bit body is used for breaking The scraper bit (15) has a pentagonal prism shape as a whole, and a quadrangular pyramid-shaped reinforcing rib (21) for improving the strength of the scraper bit (15) is arranged at the root of the scraper bit (15), and the two are of an integrated structure; The scraper bit (15) and the lower connecting rod (10) are the drill body (20) of the scraper bit (15), and there are two bottom drilling fluid injection holes ( 13); the double helix struct...
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