Measuring method and system comprising a semi-rigid extension
AssigneeInstitut Francis du Petrole
InventorChristian Wittrisch
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Abstract
A system for displacing instruments in a pipe including a portion that is greatly inclined to the vertical. The system includes a set of instruments mechanically linked, by means of an extension, to a first end of electrically-powered displacement device. The extension is a section of a composite, semi-rigid rod that can be wound around a drum and comprises at least one electric conductor. The present invention also relates to a method for implementing the system. Application is to greatly inclined oil wells and to lateral holes.
Claims18
A system for displacing instruments (5) in a pipe (1) comprising a portion (3) greatly inclined to the vertical, characterized in that said system comprises a raising and lowering flexible member which is wound on and unwindable from a drum (9), an electrically operable displacement means (6) connected to the flexible member, a set of instruments (5) mechanically connected to the electrically-powered displacement means (6) by an extension (8) of determined length, said extension comprising a section of a semi-rigid composite rod windable on a drum and including at least one electric conductor coextensive therewith;
- whereby the extension (8) allows the set of instruments (5) to reach portions of well holes and pipes not accessible by the displacement means 6.
A method for displacing instruments in an oil well configured as an uncased drain hole, comprising a portion greatly inclined to the vertical, comprising:
- fastening a set of instruments to a first end of a section of a semi-rigid composite rod that is windable round a drum and comprising at least one electric conductor,
- connecting a second end of said section to a first end of electrically-power displacement means positioned in said pipe portion, and
- displacing said set of instruments through the action of said displacement means in a second pipe into which said displacement means cannot be fed.
A method for displacing instruments in an oil well configured as an uncased drain hole having a portion greatly inclined to the vertical, comprising:
- fastening a set of instruments to a first end of a section of a semi-rigid composite rod that is windable around a drum and includes at least one electric conductor,
- connecting a second end of said section to a first end of electrically-power displacement means positioned in said pipe portion, and
- displacing said set of instruments through the action of said displacement means in a second pipe into which said displacement means cannot be fed.
A method for displacing instruments in a pipe comprising a portion greatly inclined to the vertical, and a portion laterally from the pipe portion, comprising:
- fastening a set of instruments to a first end of a section of a semi-rigid composite rod that is windable around a drum and includes at least one electric conductor,
- connecting a second end of said section to a first end of electrically-power displacement means positioned in said pipe portion, and
- displacing said set of instruments through the action of said displacement means in a second pipe into which said displacement means cannot be fed.
Dependencies are inferred from the claim text.