Drilling type continuous sand blasting device
A technology of sand flushing and sand flushing fluid, which is applied to drill bits, drill pipes, drill pipes, etc., can solve the problems that the sand cleaning effect of the hard sand column is not obvious, the circulation cannot be established, and the sand fishing operation is not easy to succeed. energy, improve sand washing efficiency, and reduce the effect of bottom hole pressure difference
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[0028] In order to make the purpose, technical solutions and advantages of the present invention clearer, the following technical solutions in the present invention are clearly and completely described. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0029] Such as Figure 1-Figure 4 As shown, the drillable continuous sand washing device of the present invention includes a sand washing drill bit 1, a double-walled drill string 3, a rotary sealing wellhead 5, a rotary driving device 6, a sand washing fluid manifold 7, and a sand carrying fluid manifold 8.
[0030] The sand washing drill bit 1 includes a drill bit body 13, a drill bit body joint 14, a drill bit inner body 12, a drill bit inner joint 11, a cutti...
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