Sensor for a downhole tool
AssigneeEquinor Energy AS
InventorHarald Odd Laastad
Life of this patent
Estimating the term…
Abstract
A sensor apparatus for a downhole tool 12 comprises a sensor 24 for taking downhole measurements; and a sensor support 26, 28 for mounting the sensor 24 to the downhole tool 12. The sensor support 26, 28 includes an actuator 26 for moving at least a part of the sensor 24 in a direction extending along a longitudinal axis of the downhole tool 12, such that in use the moveable part(s) of the sensor 24 can move relative to the tool 12 in a direction extending along a longitudinal axis of a borehole. The sensor apparatus is arranged to log measurements from the sensor using a point on the tool 12 as a reference to determine relative depth between measurements without using an external reference point to obtain an indication of the absolute depth of the measurements.
Claims20
A sensor apparatus for a downhole tool, the sensor apparatus comprising:
- a sensor for taking downhole measurements;
- and
- a sensor support for mounting the sensor to the downhole tool,
- wherein the sensor support includes an actuator for moving at least one moveable part of the sensor in a direction extending along a longitudinal axis of the downhole tool, such that in use the at least one moveable part of the sensor can move relative to the tool in a direction extending along a longitudinal axis of a borehole,
- wherein the actuator includes a mechanism for controlled translating movement of the at least one moveable part of the sensor in a straight line that is parallel with the longitudinal axis of the tool in order that the sensor and the actuator are arranged so that measurements can be taken for at least one of
- while the at least one moveable part of the sensor is moving, and
- with step-wise movements of the at least one moveable part of the sensor between multiple measurements,
- and wherein, in use, the sensor apparatus logs multiple measurements from the sensor with movement of the at least one moveable part of the sensor via the mechanism to different locations along the straight line that is parallel with the longitudinal axis during the multiple measurements and logs relative locations of the multiple measurements using a point on the tool as a reference without using an external reference point to obtain an indication of the absolute depth of the measurements.
Dependencies are inferred from the claim text.