High Temperature Casing Condition – Multi Finger (HTCC-MF) Tool

Abstract

Knowledge of the integrity of casing is important to avoid blowouts and loss of production. There are different ways to measure casing condition, but contact methods are more accurate than non-contact methods. Multi-finger calliper logs are a useful and accurate way to monitor the condition of casing in wells. This paper presents a high temperature, high pressure geothermal multi-finger calliper. It can operate in high temperature wells and thus negates the need to quench the well beforehand. It provides 3D visualisation of the inside of the casing and can be combined with existing high temperature electromagnetic tools to measure the thickness of the casing.