| 摘要 |
<p>The invention relates to a device for removal and filtration of drilling fluid at top hole drilling, where a suction module ( 10 ) comprises an extended, pipe-formed body ( 30 ), open at the top and which is arranged to an ocean-bottom penetrating pipe, through which a drill stem is led for drilling of the top hole, and where the pipe-formed body ( 30 ) comprises at least one outlet passage ( 32 ) in the pipe wall for export of return drilling fluid from the bore hole to a pump module ( 12 ). The invention is characterized in that the pipe-formed body ( 30 ) comprises a filtration device with through openings, where the mentioned openings are arranged to let through, to at least one outlet passage ( 32 ), return drilling fluid containing suspended material, such as swelling clay and stones, having a size that is less that the diameter of the inlet pipe of the pump or the openings of the pump.</p> |
