E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 21/00 (2006.01)
Patent
CA 2546690
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 characterised 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.
L'invention concerne un dispositif d'extraction et de filtrage d'un fluide de forage lors du forage à trou de voûte. Un module d'aspiration (10) comporte un corps allongé tubulaire (30) ouvert sur le haut, disposé dans un tube pénétrant le fond marin, dans lequel un train de tiges est guidé pour le forage du trou de voûte, ledit corps tubulaire (30) comportant au moins un passage de sortie (32) dans la paroi du tube, destiné à l'évacuation de fluide de forage de retour, du trou de forage vers un module de pompe (12). L'invention est caractérisée en ce que le corps tubulaire (30) comporte un dispositif de filtrage présentant des ouvertures traversantes destinées à l'évacuation, vers au moins un passage de sortie (32), de fluide de forage de retour contenant des éléments en suspension, tels que de l'argile gonflante et des roches, dont le diamètre est inférieur à celui du tube d'admission de la pompe ou des ouvertures de la pompe.
Agr Services
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
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