Slim tool taxis facilitate logging a highly deviated 6” hole section on wireline
KOC needed to acquire petrophysical and reservoir data in a highly deviated 6”wellbore section. Conveying wireline tools via pipe was the only option when faced with deviations over 60degrees in such wellbore sizes.
However, KOC is laser focused on rig efficiency and tasked Schlumberger and Petromac to provide a solution to deploy wireline tools by gravity. A slim tool taxi was designed, manufactured and deployed in record time.
Slim Tool taxis were extensively tested and Petromac simulations showed that the drag on wireline tools can be reduced down to as little as 5%. Armed with this, the slim taxis were deployed for the first time in Kuwait to a record breaking deviation of 72°. A triple combo plus pretesting tool was deployed in one run and tool reached TD effortlessly. Data quality was devoid of stick-slip and no sticking observed during extensive pre testing.
High deviation wireline logging in 6” wellbores without resorting to PCL.
Petromac’s Slim Tool Taxis and conveyance expertise enable designing toolstrings with ultra low friction.
World record deviation of 72° achieved in the first attempt in Kuwait with a TripleCombo-Pressure Express Toolstring.
Holefinder system facilitates wireline logging in an ‘impossible well’ in Iraq
Near Vertical ‘Impossible Well’ Logged in Iraq
An operator in Iraq was combating major issues with wellbore ledges in a well with only 6 deg deviation. After two wireline runs which were held up at shallow depth, the operator undertook a wiper trip, only to experience similar problems again on the 3rd attempt. The decision was made to run a TLC operation, however this was also unsuccessful.
In all a total of 5 days of rig time had been lost trying to pass a 20” washout with associated ledge.
Frustrated with the lack of results from conventional wireline and TLC, the operator sought the expertise of Petromac to log this critical well. A total of 6 descents were made with Petromac Wireline Express – all seamlessly conveyed to TD.
Without a holefinder, wireline toolstrings are easily held up by ledges and washouts.
Using the Wireline Express holefinder, the toolstring does not loose any momentum as it slides over wellbore obstructions.
In ‘vertical’ wellbores large ledges will persistently holdup toolstrings, even on TLC operations.
Petromac Tool Taxis ensure that the angled holefinder is always oriented upwards, allowing the toolstring to slide seamlessly over ledges.
A well which could not be logged on TLC was subsequently logged using the Petromac holefinder system (6 successful runs in hole).