Downhole tool including a bore sensor

A well system, comprising:

• a wellbore extending through one or more subterranean formations;
• wellbore casing located in the wellbore, the wellbore casing including a latch coupling;
• and
• a downhole tool located in the wellbore and configured to engage with the latch coupling, the downhole tool, including:
• a latch collet including a collet body, the collet body having a collet body opening extending through a thickness (tcb) thereof and a plurality of collet fingers;
• a mandrel positioned within the collet body, the mandrel having a mandrel slot therein;
• and
• a bore sensor positioned within the collet body opening and the mandrel slot, the bore sensor configured remain in a radially extended state when the latch collet is in too large size casing and thereby prevent the collet body and the mandrel from sliding relative to one another and configured to be pushed to a radially compressed state when the latch collet is in the correct size casing and thereby not prevent the collet body and the mandrel from sliding relative to one another.

A method for forming a well system, comprising:

• forming a wellbore through one or more subterranean formations;
• positioning wellbore casing in the wellbore, the wellbore casing including a latch coupling;
• and
• positioning a downhole tool in the wellbore and configured to engage with the latch coupling, the downhole tool, including:
• a latch collet including a collet body, the collet body having a collet body opening extending through a thickness (tcb) thereof and a plurality of collet fingers;
• a mandrel positioned within the collet body, the mandrel having a mandrel slot therein;
• and
• a bore sensor positioned within the collet body opening and the mandrel slot, the bore sensor configured remain in a radially extended state when the latch collet is in too large size casing and thereby prevent the collet body and the mandrel from sliding relative to one another and configured to be pushed to a radially compressed state when the latch collet is in the correct size casing and thereby not prevent the collet body and the mandrel from sliding relative to one another.