Apparatus and method for detection of position of a component in an earth formation

A method for estimating a position of a second borehole relative to a first borehole, the method comprising:

• conveying a carrier comprising a position sensing device disposed thereat through the second borehole;
• transmitting a first signal from the position sensing device towards the first borehole, the first signal comprising a type of energy;
• receiving a second signal with the position sensing device in response to the first signal interacting with the first borehole or material at the first borehole, the second signal comprising the same type of energy as the first signal;
• and
• estimating the position of the second borehole relative to the first borehole using the second signal;
• wherein the first signal and the second signal comprise at least one of electromagnetic energy and electric current.

An apparatus for estimating a position of a second borehole relative to a first borehole, the apparatus comprising:

• a carrier configured for being conveyed through the second borehole;
• and
• a position sensing device disposed at the carrier and configured to sense the first borehole to estimate the position of a second borehole relative to the first borehole by transmitting a first signal comprising a type of energy from the position sensing device towards the first borehole and receiving a second signal comprising the same type of energy as the first signal in response to the first signal interacting with the first borehole or material at the first borehole;
• wherein the position sensing device emits and receives signals comprising at least one of electromagnetic energy and electric current to sense the first borehole.