Inflow regulation device for a production pipe for production of oil or gas from an oil and/or gas reservoir
First Claim
1. 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.
2 Assignments
0 Petitions
Accused Products
Abstract
Inflow regulation device for a production pipe for production of oil or gas from an oil- and/or gas reservoir (9), where the production pipe comprises a lower drainage pipe with drainage pipe sections (5) with one or more drainage pipe elements (2; 2a, 2b) having opening(s) (3; 3a, 3b) for inflow of oil and/or gas to an inner space (8) of the drainage pipe section. The inflow may be regulated by a movable sleeve (1) that abuts one adjacent side surface of the drainage pipe section (2; 2a, 2b) and where the sleeve is provided with a portion(s) (6) being able to cover/uncover the opening(s) in the drainage pipe element. The sleeve further comprises helical spurs/recesses (14, 15) that in conjunction with one adjacent abutting surface (18, 21) of the drainage pipe element (2; 2a, 2b) forms channels (16, 17) that may connect the reservoir (9) with the inner space (8) of the drainage pipe. The helical spurs/recesses (14, 15) may be constituted by one or more pair(s) of left- and/or right-oriented spurs/recesses. The sleeve (1) is axially movable by a double-acting ring piston device (21, 22) or by thread means (12, 13) arranged between the sleeve (1) and the drainage pipe element (2; 2a, 2b).
168 Citations
17 Claims
- 1. 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.
Specification