A method of potentials has been used in the past for the calculation of the force acting on isolated magnetic bodies in solar corona and inner heliosphere, where large gradients of magnetic pressure exist. Since recent observations showed that coronal mass ejections (CME) can leave the Sun more frequently than was expected before 1995, it is clear that interactions between CMEs can play important role in the formation of geo‐effective structures near the Earth’s orbit. We present here an evaluation of two interacting CMEs and the field distribution around them, using potential solution in bi‐cylindrical coordinates. © 2003 American Institute of Physics