Device for centering a sensor assembly in a bore
AssigneePetromac IP Limited
InventorStephen Peter McCormick
Life of this patent
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Abstract
A centering device is connected to a rotating sensor assembly located at the bottom end of a tool string. The device comprises a centraliser with a plurality of arms spaced circumferentially apart around a longitudinal central axis of the device, and a shaft with a mount for fixing the shaft to the rotating sensor assembly. The shaft extends below the rotating sensor assembly, and the shaft and rotating sensor assembly rotate together on the longitudinal central axis. The centraliser is rotationally mounted to the shaft to allow the shaft to rotate within the centraliser and with the centraliser positioned below the rotating sensor assembly.
Claims20
A device for centering a rotating sensor assembly in a wellbore, the rotating sensor assembly located at the bottom end of a tool string, the device comprising:
- a centraliser comprising a plurality of arms spaced circumferentially apart around a longitudinal central axis of the device,
- a shaft with a mount for fixing the shaft to the rotating sensor assembly to extend below the rotating sensor assembly, so that the shaft and rotating sensor assembly rotate together on the longitudinal central axis,
- wherein the centraliser is rotationally mounted to the shaft to allow the shaft to rotate within the centraliser and with the centraliser positioned below the rotating sensor assembly, and
- in use, an upper end of the shaft is connected to the rotating sensor assembly, and the lower end of the shaft is a terminal end at the bottom end of the tool string.
A device for centering a rotating sensor assembly in a wellbore, the rotating sensor assembly located at the bottom end of a tool string, the device comprising:
- a centraliser comprising a plurality of arms spaced circumferentially apart around a longitudinal central axis of the device,
- a shaft with a mount for fixing the shaft to the rotating sensor assembly to extend below the rotating sensor assembly, so that the shaft and rotating sensor assembly rotate together on the longitudinal central axis,
- wherein the centraliser is rotationally mounted to the shaft to allow the shaft to rotate within the centraliser and with the centraliser positioned below the rotating sensor assembly, and
- a sleeve rotationally mounted to the shaft to allow for rotation of the shaft within the sleeve, the centraliser mounted to the sleeve to thereby rotationally mount the centraliser to the shaft, and
- an upper bearing located at or towards an upper end of the shaft and a lower bearing located at or towards the lower end of the shaft, the upper and lower bearings between the shaft and sleeve.
Dependencies are inferred from the claim text.