Methods and systems for downhole temperature logging
AssigneeHalliburton Energy Services, Inc.
InventorsPeng Li, Lianhe Guo, Wesley N. Ludwing
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Abstract
A downhole temperature logging method includes deploying a temperature logging device into a borehole, the temperature logging device having a mechanical drive and at least one shape memory alloy (SMA) unit. The method also includes deforming the SMA unit in response to a temperature or temperature range, wherein the deforming causes marks to a medium. The method also includes retrieving the medium and analyzing the marks.
Claims20
A downhole temperature logging method comprising:
- deploying a temperature logging device into a borehole, said temperature logging device having a mechanical drive and at least one shape memory alloy (SMA) unit;
- deforming the at least one SMA unit in response to a temperature or temperature range, wherein said deforming results in marks to a medium;
- and
- retrieving the medium from the borehole and analyzing the marks.
A downhole temperature logging system that comprises:
- at least one shape memory alloy (SMA) unit;
- a medium that receives marks due to deformation of the at least one SMA unit in response to a temperature or temperature range;
- and
- a mechanical drive that moves the medium in relation to the at least one SMA unit as a function of time or measured depth.
The system of claim 19, wherein the spring causes the contact point to press against the medium, and wherein deformation of the SMA material as a function of temperature changes an amount of pressure applied by the contact point to the medium.
Dependencies are inferred from the claim text.