Controlled rotational measuring head and spooling system for strings configured to deliver and retrieve downhole tools and method of its use

A method for controlling a rotation of a measuring head configured for use with a spooled downhole tool string, the method comprising:

• sending a first and a second signals to an actuator in communication with the measuring head;
• and
• in response to the first signal, rotating the measuring head with the actuator about a vertical axis of the measuring head to a first controlled rotational position;
• and
• in response to the second signal, rotating the measuring head with the actuator about the vertical axis of the measuring head to a second different controlled rotational position.

A spooling system for use with a string configured for connection to a downhole tool, the spooling system comprising:

• an actuator including a connection at one end to a measuring head;
• and
• a spooling drum located rearward of the measuring head;
• the actuator configured to rotate the measuring head about a vertical axis of the measuring head between a first controlled rotational position and a second controlled rotational position;
• the spooling drum configured to rotate about a central vertical axis of the spooling drum and place a central axis of rotation of the spooling drum into a first controlled angular orientation and a second different controlled angular orientation.