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US 10,502,046 B2Granted
Sensor standoff
AssigneeSchlumberger Technology Corporation
InventorsAhmed Amine Mahjoub, Sebastien Isambert, Emmanuel Fayeulle, Didier Fouillou, Michael L. Evans, Christian Stoller
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Abstract
A downhole tool operable for conveyance within a wellbore extending into a subterranean formation, and for obtaining one or more measurements of the subterranean formation, wherein the downhole tool comprises a sensor, a pressure housing containing the sensor and mounted on an external surface of the downhole tool, and a sliding stabilizer covering the pressure housing.
Claims19
An apparatus, comprising:
- a downhole tool operable for conveyance within a wellbore extending into a subterranean formation, wherein the downhole tool comprises:
- a pressure housing mounted on an external surface of the downhole tool;
- a sensor sealed within the pressure housing;
- and
- a stabilizer operable to slide on the external surface of the downhole tool between a first position covering the sensor and a second position not covering the sensor, wherein the stabilizer comprises a window configured to be in optical alignment with the sensor when the stabilizer is in the first position, wherein the window comprises a transmittance that is substantially greater than a portion of the stabilizer in which the window is located, and wherein the window is configured not to be in optical alignment with the sensor when the stabilizer is in the second position.
2 more elements
An apparatus, comprising:
- a downhole tool operable for conveyance within a wellbore extending into a subterranean formation, wherein the downhole tool comprises:
- a first pressure housing mounted on an external surface of the downhole tool;
- a first sensor sealed within the first pressure housing;
- a stabilizer operable to slide on the external surface of the downhole tool between a first position covering the first sensor and a second position not covering the first sensor;
- a second pressure housing mounted on the external surface of the downhole tool;
- a second sensor contained within the second pressure housing;
- a blade covering the second pressure housing;
- and
- internal electronics connected to the at least one of the first pressure housing, the first sensor, the second pressure housing, and the second sensor;
- wherein at least one of the stabilizer and the blade comprises a window of material having a transmittance that is substantially greater than that of other portions of the stabilizer and the blade, wherein the window is configured to be in optical alignment with the first sensor when the stabilizer is in the first position, and wherein the stabilizer is configured not to be in optical alignment with the first sensor when the stabilizer is in the second position.
7 more elements
A method, comprising:
- sliding a stabilizer from a first position to a second position along an external surface of a downhole tool, wherein the stabilizer comprises a first material, wherein the stabilizer covers a sensor mounted on the external surface of the downhole tool when the stabilizer is in the second position but not when the stabilizer is in the first position, wherein the sensor is contained within a pressure housing, wherein the stabilizer comprises a window comprising a second material having a transmittance that is substantially greater than the first material, wherein the window is configured to be in optical alignment with the sensor when the stabilizer is in the second position, and wherein the window is not in optical alignment when the stabilizer is in the first position;
- and then
- inserting the downhole tool into a wellbore extending into a subterranean formation.
Dependencies are inferred from the claim text.