Wireline Engineering announces a highly successful debut for new Open Hole Roller Bogie -
26.05.09
Wireline Engineering is delighted to announce a highly successful field trial of our new Open Hole Roller Bogie wirleline conveyance tools in a difficult debut application.
Open Hole Roller Bogies were used in a challenging offshore well to convey logging toolstrings, when predictive modelling had suggested wellbore access was impossible without using expensive pipe conveyed logging.
Four 5 1/2" Open Hole Roller Bogies were used to convey three different logging toolstrings to a maximum depth below 15,500ft in three separate runs. Each logging run reached target depth without incident and showed significantly reduced pickup weights, clearly demonstrating the effective reduction of frictional drag as the Roller Bogies lifted and rolled the logging tools.
The well in question reached 60 degrees deviation by 6000ft and maintained a tangent section of 62 degrees to total depth. An 8 1/2" open hole section of almost 6000ft, comprising limestones, anhydrites and shales included known washout sections that typically present a problem for wireline access throughout the local area.
In total, the Open Hole Roller Bogies travelled more than 94,000ft, including 30,000ft in open hole, and provided very significant cost savings compared with the pipe conveyed logging alternative.
On return to base, all four Roller Bogies were rigorously inspected and were found to be in excellent condition, requiring no replacement of components and with no measurable internal or external wear recorded.
In every aspect, the tools performed entirely in line with expectation and plans are currently in hand to use Open Hole Roller Bogies in future wells in the same area.
We look forward to adding to our experience with these tools but the initial results just couldn't be better. On the evidence seen, Open Hole Roller Bogies will greatly extend the safe operating envelope for wireline logging and will bring very important cost savings to Operators who need to obtain valuable log data from challenging deviated wells.