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Conduct Pre-section planning meeting between rig and office personnel to discuss section objectives and hazards.
- Conduct a tool-box talk covering the expected problems outlined above and objectives of the hole section.
- Prepare 1900m of 5 1/2” DP on racks to P/U and rack back in derrick.
- Note: 5” HWDP is NOT required for this section
- Ensure all tools and materials are on site and in good working order for drilling the 16" hole section.
- Make sure planned 16” bit is dressed with correct size nozzles and the back up bit is on location.
- Bit breaker and 16” gauge ring should be available on location
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Make sure all BHA components are on location with backup set (check stabilizer gauge and connection).
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Ensure all the technical specifications and dimensions of the drilling tools are available, in particular the jar settings.
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Check that the Jars have been re-dressed (0 hours at start of the section).
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Ensure fishing diagrams are available for all downhole tools.
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DD to prepare BHA listing and discuss with toolpusher to minimise handling.
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DD/MWD to run vibration software using actual BHA dimensions and identify critical rpm.
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Prior to drill out, the Drilling contractor will provide an accurate BHA report including serial numbers and dimensions of all the components.
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Ensure the weights (in air and mud) of the BHA and maximum pull are clearly visible to the Driller.
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Ensure 6” liners are installed on the mud pumps.
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Ensure sufficient availability of viscosifiers at the well site to improve the low-end rheology if needed.
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Ensure sufficient quantities of broad-spectrum LCM additives are available.
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If LCM is to be used, ensure that a PBL sub is included in the drilling assembly to augment pumping coarser grained LCM material. If coarser grained LCM is pumped through the PBL sub, ensure to flush the sub with LCM free Hi-Vis fluid before functioning it closed.
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If heavy losses are expected (shallow salt wells), the cement unit should be on site at the start of section. Ensure that there is enough cement and cementing additives on site to prepare Thixotropic cement plugs if required.
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Ensure the ID of the bell nipple will allow the running of the wear bushing:
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The max OD of the 20” nom. Wear bushing is 20.625
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The minimum ID of the Diverter Spool is 20.75”
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Prior to starting the section, ensure that all personnel on rig site are aware of Low Tox Oil Based Mud handling procedures.
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Plan to get the 13 5/8” BOP tested on stump to rated working pressure (10K), as per KPO pressure test procedure.
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Ensure enough cutting skips are available for each hole section, if drilled with OBM.
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Ensure enough shakers screens are available on the rig.
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Flow rates above 4000 lpm are required for this section.
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Ensure different sizes of bits nozzles are available on the rig for hydraulics optimization
Wellsite checklist
- 2 x 13 3/8” casing tongs & power units
- Start getting vibro truck for 12 ¼” hole if required
- Schlumberger to call out
- Cmt samples to send to hassi
- Alert weatherford & bring out 2 days prior
- Bits & jets
- Check barytes
- Review ultra seal / lcm
- Check bj. Float equipment & cmt / plug head – xo… etc
- Consider jar hour before rih
- Install casing shoe & f/c & install stop rings & centralisers
- Test & flush vacuum degasser with 10.5ppg mud
- Check ton miles prior to wiper trip