Operations Manual
Surface:
• Large WOB fluctuations • Rig/top drive shaking • Reduced and inconsistently slow ROP
For mitigating vibration see "Vibration Mitigation" in the Drilling and Steering Troubleshooting section.
H2S exposure If the D-Tech RST has been exposed to an H2S environment it is required that the system be flushed with clean water before shipment. Failure to flush the tool can lead to unnecessary corrosion on the internal and external components and costly repairs and recharges. On Location Tool Storage & Maintenance When storing the D-Tech RST on location it is recommended to keep it in the shipping basket / crate until it is necessary to pick up the RST for drilling operations. If a basket is not available, please store the tool on a pipe rack or pallets. Prior to picking up the BHA it is recommended that visual inspection is done to ensure no debris has entered the collar, the turbine spins freely and there is no damage to the connection threads. Post run the tool should be visually inspected for wear, particularly on the pistons. Ensure the piston bleed nozzles and flushing ports are clear of debris and if using WBM flush through with fresh water to prevent the drilling fluid drying internally. If using OBM then every effort to drain the tool of excess OBM should be made (pressure washing may be necessary). The turbine should also be checked by hand to ensure it turns freely and is not obstructed. Check that the pistons have not rotated as this is a sign that they have worn and the RST should not be re-ran.
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