Patent ID: 6112815
Filing Date: 2000-09-05
Classification: E21B

Abstract:
Inflow regulation device for a production pipe for production of oil or gas from an oil- and/or gas reservoir, where the production pipe comprises a lower drainage pipe with one or more drainage pipe sections with at least one drainage pipe element having an opening for inflow of oil and/or gas from the reservoir to the inner space of the drainage pipe section, where the inflow may be regulated by at least one inflow regulation device comprising one movable sleeve that abuts one adjacent side surface of the drainage pipe section and where the sleeve is provided with a section able to cover/uncover the opening in the drainage pipe section and further with a flow channel adapted to connect the reservoir with the inner space of the drainage pipe section, wherein the flow channel is constituted by one or more helical spurs/recesses arranged in the side surface of the sleeve, whereby the spurs/recesses are arranged in that side surface of the sleeve abutting the side surface of the drainage pipe element.