MFC tools are always run with centralizers above and below. It is assumed that the centralizer body is in the middle of the pipe (no eccentricity), and that the MFC tool is rigid. The MFC measurement as the tools moves from bottom to top are described below: Before the top centralizer reaches the deformed interval, the MFC has a ‘baseline’ eccentricity value, function of the deviation, tool weight, etc. As the top centralizer enters in the deformed region (lower bend), it remains centred in the cross-section, and the MFC starts to experience an increased eccentricity as the tool centre moves to the side (closer to the bend). The eccentricity reaches a maximum when the fingers are at the exactly at the lower bend. When both centralizers, and consequently the MFC, are in the deformed section, the tool is parallel to the deformed well trajectory. The eccentricity goes back to the baseline value. As the top centralizer reaches the end of the deformed interval (upper bend), the eccentricity increases again, but compared to the bottom bend, the eccentricity direction is opposite for a case of planar deformation. Maximum eccentricity is reached when the MFC is exactly at the bend depth.

MFC tools are always run with centralizers above and below. It is assumed that the centralizer body is in the middle of the pipe (no eccentricity), and that the MFC tool is rigid. The MFC measurement as the tools moves from bottom to top are described below: Before the top centralizer reaches the deformed interval, the MFC has a ‘baseline’ eccentricity value, function of the deviation, tool weight, etc. As the top centralizer enters in the deformed region (lower bend), it remains centred in the cross-section, and the MFC starts to experience an increased eccentricity as the tool centre moves to the side (closer to the bend). The eccentricity reaches a maximum when the fingers are at the exactly at the lower bend. When both centralizers, and consequently the MFC, are in the deformed section, the tool is parallel to the deformed well trajectory. The eccentricity goes back to the baseline value. As the top centralizer reaches the end of the deformed interval (upper bend), the eccentricity increases again, but compared to the bottom bend, the eccentricity direction is opposite for a case of planar deformation. Maximum eccentricity is reached when the MFC is exactly at the bend depth.