E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 21/00 (2006.01) E21B 17/00 (2006.01) E21B 21/015 (2006.01) E21B 33/08 (2006.01)
Patent
CA 2333516
There is described an arrangement for the removal of bore cuttings, sludge and gases from the mouth of the bore hole where is arranged between the drill stem and the sleeve pipe an end piece which ensures a fluid-tight seal, and where in the wall portion of the sleeve pipe there is an opening which is connected to a conduit system so that the bore cuttings are fed forcibly via the opening in the sleeve pipe and into the conduit system for relocating of the matter to a position at a distance from the mouth of the bore hole, as a result of the pressure which is established in the annular space between drill stem and sleeve pipe on the supply of bore sludge.
L'invention concerne un système permettant d'évacuer les déblais et les boues de forage ainsi que les gaz de l'entrée d'un trou de forage. Un organe terminal est monté entre la masse-tige et le tube de chemise et permet de former une obturation étanche aux fluides. La partie paroi du tube de chemise comprend une ouverture reliée à un système de conduites de manière que les déblais sont forcés vers cette ouverture du tube de chemise et dans le système de conduite ce qui permet d'envoyer ces matières à une certaine distance de l'entrée du trou de forage grâce à la pression qui s'exerce sur la masse de boues de forage dans l'espace annulaire compris entre la masse-tige et le tube chemise.
Agr Services As
Osler Hoskin & Harcourt Llp
LandOfFree
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