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‘ Fishing’as a Petroleum (Drilling) Engineer. Fishing in Petroleum Engineering. In Petroleum Engineering, Drilling Engineers use the term ‘Fishing’ to recover any objects accidentally lost/dropped in an oil/gas well
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Fishing in Petroleum Engineering • In Petroleum Engineering, Drilling Engineers use the term ‘Fishing’ to recover any objects accidentally lost/dropped in an oil/gas well • The ‘fish’ could be anything including drill-pipe, drill bits, cable, tools and junk. • ‘Fishing’ requires ability to identify the ‘fish’, and design a retrieving tool to recover the fish (think rod, reel & hook! No bait required)
Steps in ‘Fishing’ • Identify the fish and obtain information on the size, dimensions & “latch on” characteristics. • Design or select an appropriate fishing tool • Use tool selected to locate, latch and retrieve fish • Finally, as with fishing, be patient – trial and error & improvement is required.
Common “Fish” in oil/gas wells • Drill Bits • Drill pipe • Tubing • Cable • Logging tools • Chains • Miscellaneous items
Common ‘Fish’ Drill pipe or tubing Cable Drill bit Wire & logging tool Chain
Common Fishing tools • Overshot • Grapple • Magnets • Spear • Hook • Custom design tools
Common “Fishing”tools Hooks Magnet Overshot Spear Hook Grapple • Drill Bits • Drill pipe • Tubing • Cable • Logging tools • Chains • Miscellaneous items
Activity - Time to go fishing! <- Gusher#1 • Two wells Gusher #1 & Gusher#2 are being drilled in Million-Barrel Oil Field. • Both wells have ‘fish’ in them • Your task is to retrieve the fish and continue drilling so that you can produce your well first. Gusher#2 ->
Time to go fishing! • Identify fish • Use Playdoughito create an“impression” block to identify fish
Time to go fishing! • Select/design an appropriate fishing tool based on fish identified
Time to go fishing • Insert fishing tool into well and try to retrieve ‘fish’
Time to go fishing! FISH ON !!
Fishing Challenge! Horizontal well fishing ! Retrieve the fish from a horizontal well! Did you know? Horizontal wells in the Barnett Shale in North Texas are drilled ~7000’ deep and ~3000’ laterally! Horizontal wells in the BakkenShale are drilled 10,000 ft(~ 2 miles) deep and 10,000 ft (~ 2 miles) laterally!
Being a Petroleum Engineer • Petroleum Engineers have many sub-specialities. • Drilling Engineers drill for oil/gas. • Reservoir Engineers calculate the amount of oil/gas and the best way to produce the oil/gas. • Production Engineers produce & transport the oil/gas.