Enabling critical data and sample acquisition in fractured and washed out wells

An onshore operator in Western Australia had a history of wells where Wireline toolstrings have had difficulty reaching TD often getting hung-up while RIH as well as getting overpulls requiring firing of Wireline Jars to free tools. This often resulted in cancelled Wireline runs thus missing critical data and fluid samples in exploration wells. Subsequently, the operator requested the use of Petromac conveyance systems. Tool Taxis with Pathfinder was deployed on Baker Wireline toolstrings (GrandSLAM dual density, STAR-HD, RCX Sampling and MAXCOR) enabling successful acquisition of critical formation evaluation data and wellbore fluid samples. Petromac’s oriented Tool Taxis ensured toolstrings rolled over ledges and washouts without getting hung up. The low drag wheels ensured good wellbore images without stick slip and reduced risk of differential sticking during RCX fluid sampling. Toolstrings with Tool Taxis also experienced less jar firing events. In one low deviation well, Pathfinder successfully navigated a GrandSLAM dual density toolstring thru an extremely washed-out wellbore to TD in the first attempt. Tool Taxis with Pathfinder successfully navigated toolstrings to TD where previous runs hung up due to ledges and washouts. Fig1: Comparison of other roller devices vs Petromac Tool Taxi. Petromac’s patented orientation system ensures wheels always roll over ledges and washouts instead of rollers falling into washouts becoming hung-up points on a toolstring.