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US 2013/0240197 A1Published application
Wireless downhole unit
AssigneeWelltec A/S
InventorsJorgen Hallundbæk, Jesper Oluf Larsen
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Abstract
The present invention relates to a wireless downhole unit (1) adapted to be lowered into a well (2) in a casing (3) having an inner wall (4) and an inner diameter (Dc). The wireless downhole unit comprises an electrical motor (5), a pump (6), and driving means (7) for allowing movement of the wireless downhole unit within the casing, and at least one battery pack (8). The present invention further relates to a downhole system.
Claims16
A wireless downhole unit (1, 100) adapted to be lowered into a well (2) in a casing (3) having an inner wall (4) and an inner diameter (Dc), comprising:
- an electrical motor (5),
- a pump (6),
- driving means (7) for allowing movement of the wireless downhole unit within the casing,
- at least one battery pack (8) comprising at least one battery (9) for powering the electrical motor driving the pump driving the driving means to move the unit along the inner wall of the casing,
- wherein the unit comprises an expandable device (101) having a centre (102) and being expandable from a first diameter (D1) to a second diameter (D2), the expandable device has an aperture (104) in the centre, and a turbine (105) is arranged in fluid connection with the aperture for recharging the battery.
2 more elements
(canceled)
Dependencies are inferred from the claim text.