초록 ▼

A downhole tool and apparatus is described for logging and/or remedial operations in a wellbore in a hydrocarbon reservoir. The tool comprises an autonomous unit (1) for measuring downhole conditions, preferably flow conditions. The autonomous unit comprises locomotion means (12) for providing a mot

A downhole tool and apparatus is described for logging and/or remedial operations in a wellbore in a hydrocarbon reservoir. The tool comprises an autonomous unit (1) for measuring downhole conditions, preferably flow conditions. The autonomous unit comprises locomotion means (12) for providing a motion along said wellbore; means (14) for detecting said downhole conditions; and logic means (113) for controlling said unit, said logic means being capable of making decisions based on at least two input parameters. It can be separately attached to a wireline unit (22) connected to the surface or launched from the surface. The connection system (31, 32) between both units can be repeatedly operated under down hole conditions and preferably includes an active component for closing and/or breaking the connection.

대표청구항 ▼

1. A method for acquiring signals representing down hole conditions of a wellbore in a hydrocarbon reservoir, said method including the steps of:(a) introducing an autonomous unit into the wellbore, said autonomous unit being adapted to operate untethered in the wellbore untethered from the surface

1. A method for acquiring signals representing down hole conditions of a wellbore in a hydrocarbon reservoir, said method including the steps of:(a) introducing an autonomous unit into the wellbore, said autonomous unit being adapted to operate untethered in the wellbore untethered from the surface and comprising: (i) a locomotion unit for providing motion along the wellbore; (ii) detecting units for detecting the down hole conditions; and (iii) a logic unit for controlling said autonomous unit, said logic unit being capable of making decisions based on at least two input parameters; and (b) activating said locomotion unit and said detecting units so as to perform measurements of the down hole conditions in at least one location of the wellbore while the autonomous unit is untethered from the surface.