Systems and methods for determining deformation of a tool string

A system, comprising:

• at least one processor;
• memory in electronic communication with the at least one processor;
• and
• instructions stored in the memory, the instructions being executable by the at least one processor to cause the at least one processor to:
• for a formation testing operation of a wellbore:
• receive temperature data for the wellbore;
• receive pressure data for a drilling fluid flowing through a tool string;
• estimating a thermal deformation of the tool string based on the temperature data, the pressure data, and physical properties of the tool string, and
• predicting one or more internal forces on the tool string based on the estimating the thermal deformation, the one or more internal forces being indicative of a loading of the tool string.

A computer-readable storage medium including instructions that, when executed by at least one processor, cause the at least one processor to:

• for a formation testing operation of a wellbore:
• receive temperature data for the wellbore;
• receive pressure data for a drilling fluid flowing through a tool string;
• estimating a thermal deformation of the tool string based on the temperature data, the pressure data, and physical properties of the tool string, and
• predicting one or more internal forces on the tool string based on the estimating the thermal deformation, the one or more internal forces being indicative of a loading of the tool string.