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US 2014/0208843 A1Published application
Determining Perforation Orientation
AssigneeOptasense Holdings Limited
InventorAlastair Godfrey
Life of this patent
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AssigneeOptasense Holdings Limited
InventorAlastair Godfrey
Estimating the term…
A method and apparatus for determining the relative orientation of objects downwell, and especially to determining perforator orientation, involves varying the orientation of an object, such as a perforator gun (302) in the wellbore (202) and activating at least one directional acoustic source (402a-c). Each directional acoustic source is fixed in a predetermined location to the object and transmits an acoustic signal preferentially in a known direction. The directional acoustic sources are activated so as to generate sound in a plurality of different orientations of said object. An optical fibre (104) is interrogated to provide distributed acoustic sensing in the vicinity of the object; and the acoustic signals detected by the optical fibre are analysed to determine the orientation of the at least one directional acoustic source relative to the optical fibre, for instance by looking at the relative intensity in the different orientations.
A method of orienting an object in a wellbore comprising:
6-7. (canceled)
(canceled)
(canceled)
17-19. (canceled)
(canceled)
A method of processing signals acquired from a distributed acoustic sensor comprising:
(canceled)
The use of DAS sensing to determine the orientation of objects, having directional acoustic sources, in a wellbore.
A distributed acoustic sensing apparatus for determining the location of an object downwell comprising an interrogator unit configured to, in use, interrogator an optical fibre deployed downwell to provide distributed acoustic sensing and a processor configured to take a plurality of measurement signals acquired when an object having at least one directional acoustic source is located downwell wherein said signals correspond to a plurality of orientations of said object and process the measurement signals to determine the orientation of said object relative to the optical fibre.
A well perforator having at least one directional acoustic source located in a fixed orientation relative to a perforation detector.
Dependencies are inferred from the claim text.