The invention provides an adjacent well distance while-drilling electromagnetic large-range detection
system without interfering adjacent well operation. The adjacent well distance while-drilling electromagnetic large-range detection
system comprises an adjacent well
signal transmitting module, a positive drilling
signal receiving module and a ground
signal processing module, wherein the adjacentwell signal transmitting module comprises adjacent well sleeves, insulating joints and a low-frequency
alternating current power supply; the insulating joints are mounted in the middles of the adjacent well sleeves and spaced from the adjacent well sleeves; the ground surface low-frequency
alternating current power supply supplies power to the two parts of the adjacent well sleeves at the two endsof the insulating joints; the positive drilling signal receiving module comprises a non-magnetic
drill rod and an MWD, and the MWD detects
magnetic field signals generated by current on the adjacentwell sleeves; and the ground
signal processing module comprises an MWD signal detecting device and a computer, the MWD signal detecting device receives the
magnetic field signals and transmits the
magnetic field signals to the computer, and the computer is used for calculating the distance between an adjacent well and a positive drilling well through the magnetic field signals. The adjacent well distance while-drilling electromagnetic large-range detection
system has the beneficial effects that in the drilling process, the adjacent well distance is detected while drilling, normal operation ofthe adjacent well is not interfered, the production efficiency is improved, and the detection precision is improved.