Tracking and measurements associated with cement plugs

A method comprising:

• providing a cement head comprising:
• a tubular body having a top end and a bottom end, and a borehole arranged through at least a portion of the tubular body;
• a first cement plug arranged in the borehole, wherein the first cement plug comprises a substantially solid insert having a void in a bottom portion of the insert;
• a second cement plug arranged in the borehole below the first cement plug and configured to exit the cement head upon releasing a retention device, wherein the second cement plug comprises an eyehook configured to fit within the void of the first cement plug;
• and
• a spool assembly arranged on the tubular body,
• wherein the spool assembly comprises a drum rotatable about a central axis and a continuous cable having a first end and a second end, the first end being attached to the drum and the second end being attached to the cement plug, and
• wherein rotating the drum about the central axis results in spooling or unspooling the continuous cable about the drum;
• arranging the cement head at a top location of a casing string in a subterranean formation as part of a cementing operation;
• and
• releasing the retention device causing the second cement plug to exit the borehole into the subterranean formation through an interior of the casing string, wherein the continuous cable is unspooled about the drum as the second cement plug traverses the interior of the casing string.

A system comprising:

• a wellbore in a subterranean formation;
• and
• a cement head comprising:
• a body having a top end and a bottom end, and a borehole arranged through at least a portion of the body;
• a first cement plug arranged in the borehole, wherein the first cement plug comprises a substantially solid insert having a void in a bottom portion of the insert;
• a second cement plug arranged in the borehole below the first cement plug and configured to exit the cement head and enter the wellbore upon releasing a retention device, wherein the second cement plug comprises an eyehook configured to fit within the void of the first cement plug;
• and
• a spool assembly mounted to the top end of the body,
• wherein the spool assembly comprises a drum rotatable about a central axis and a continuous cable having a first end and a second end, the first end being attached to the drum, and
• wherein rotating the drum about the central axis results in spooling or unspooling the continuous cable about the drum.