Method and apparatus for determining fluid flow characteristics
AssigneeSchlumberger Technology Corporation
InventorsPatrice Ligneul, Bertrand Theuveny, Tullio Moscato, Sebastien Prangere, Olivier Peyret
Life of this patent
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Abstract
A measurement device is configured in a shaped charge package to be utilized in a perforating gun section tool string. The measurement device may include for example thermal conductivity detectors (TCD) configured to measure fluid flow velocity and/or thermal characteristics of the flowing fluid. The measurement device may include for example a pair laterally spaced TCDs each having sensor faces positioned co-planar with a surface across which the fluid flows. The measurement device may include a recessed TCD, having a sensor face recessed below an opening in the exterior surface.
Claims20
A measuring device, the device comprising:
- a thermal insulating body having an exterior surface to be disposed in use such that a fluid flows across the exterior surface;
- and
- a recessed thermal conductivity detector (TCD) comprising a thermally conductive pane having a sensor face recessed below an opening in the exterior surface providing a cavity between the sensor face and the exterior surface.
A downhole tool, comprising:
- a perforating gun comprising a plurality of shaped explosive charges;
- and
- a measuring device configured in a shaped charge package and mounted in the perforating gun, the measuring device comprising:
- a pair of thermal conductivity detectors (TCD) spaced laterally apart in a thermal insulating body, each TCD of the pair of TCDs having a thermally conductive pane having a sensor face located substantially co-planar with an exterior surface of the thermal insulating material, and a sensing element in connection with an interior surface of the pane.
A method, comprising:
- disposing a downhole tool in a well, the downhole tool comprising a perforating gun comprising a plurality of shaped explosive charges and a measuring device configured in a shaped charge package and mounted in the perforating gun, the measuring device including a pair of thermal conductivity detectors (TCD) spaced laterally apart in a thermal insulating body, each TCD of the pair of TCDs having a thermally conductive pane having a sensor face located substantially co-planar with an exterior surface of the thermal insulating material, a sensing element in connection with an interior surface of the pane, and a sensing circuit;
- detonating the shaped explosive charges, thereby creating fluid communication with a subterranean formation through perforations;
- and
- measuring a velocity of a fluid flowing in a direction from the perforations to a surface of the well.
Dependencies are inferred from the claim text.