WELLBORE CLEANOUT - Altus Intervention
Transcript of WELLBORE CLEANOUT - Altus Intervention
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WELLBORE CLEANOUTDEBRIS TYPE CHARTS & TOOL STRING
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DEBRIS TYPE CHART
SOLIDS SLURRIES/GUNK (VISCOUS LIQUIDS) JUNK/RISKS
SOURCE SOURCE SOURCETYPE TYPE TYPE
Silt from productionSand from production
Mud settlement
Installation of completions
Mil l ing fluid/ synthetic muds gelled oil based mud after mixing with water
BOP stack/DHSV seals/plug seals
After dri l l out
Poor hole cleaning Production fluids(highly well specific)
Perforation charges
Introduced tubulars in to the well
Mil l ing operations
Poorly prepared tubulars
Dropped objects
Brine, formation
Water formation
Various sediments Pipe dope Seals/elastomericmaerials
Barite Viscous muds Cement plugs/float equipment
Proppants Swarf
Salt
Scale
Cement cuttings Asphaltenes/ Black sticky stuff
Perforation debris
Mil led scale rust Accidentally introduced materals
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DEBRIS TYPE CHART
SCALE
ASPHALTENE WAXES BSS
SCALE
HYDRATES SWARF
SAND DEPOSIT ON SLIDING SLEEVE
SIMULATED PRODUCED &FRACTURED DEBRIS
SCALE SCALE
* Debris type images (for illustration purposes) taken from various web sources.
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APPLICATION TYPE
TYPE 1 TYPE 2 TYPE3 TYPE 4 TYPE 5
Layer debris on tubing wall .Access requirement for wellbore/
completion targets.
Vertical Debris Deposits, partial blockage.
*Partial blockage
*Full blockage
Vertical Debris Deposits.
Horizontal Debris Deposits
Vertical Debris Deposits.
Horizontal Debris Deposits
Nipple profi les/tubing OD changes
Screens
Slidingsleeves
PerfsValves, plugs,fish necks
Valves, plugs,fish necks
Swarf, rubber,nuts & boltsGas l ift/side pocket
mandrels
Vertical Debris Deposits.
Horizontal Debris Deposits
Vertical Debris Deposits.
Ful lbore. Access requirement wellbore/
completion targets.
Same as 1 & 2.Access requirement to a wider bore
beneath a narrower restriction.
Remove debris, clean inside fishneck for plug retrieval.
Junk/on top of or in-debris.Rubber/metal swarf/nuts/bolts.
*Partial, low-side/bridges *Gas lift/side pocket mandrels *Low-side, bridges
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WELLBORE CLEANOUTTOOL STRING