Frac tank explosion_steps
Oct. 17, 2011•0 likes•10,547 views
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R.J. Goodman, EHS & Operations Training Manager, XTO Energy investigated 4 separate frac tank explosions that occurred on two separate jobs. Four Explosions Occurred: November 10, 2005 – Major County, OK (2 Events) March 31, 2006 – Major County, OK April 3, 2006 – Major County, OK All four explosions had the following characteristics in common: An air/foam mixture was pumped down the tubing and returned up the tubing/casing annulus.
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Frac tank explosion_steps
- 1. FRAC TANK EXPLOSIONS
- 2.
- 3.
- 4.
- 5.
- 6.
- 7. XTO Energy Explosion Site 1 Nov. 10, 2005 – Major County, OK Location Configuration Downcomer entered the front of the tank.
- 8. XTO Energy Explosion Site 1 Nov. 10, 2005 – Major County, OK Picture of Downcomer
- 9. Internal Configuration of Frac Tank: Site 1
- 10. XTO Energy Explosion Site 2 March 31, 2006 – Major County, OK Downcomer Configuration Downcomer is chained to the tank Static Arc Point
- 11. XTO Energy Explosion Site 2 March 31, 2006 – Major County, OK Oil/Water/Natural Gas contents Downcomer 2 Part Epoxy Lining on Wall Static Builds and Arcs from Fluid to Downspout
- 12. XTO Energy Explosion Site 2 April 3, 2006 – Major County, OK
- 13.
- 14. Fire Triangle Application Air/Foam Flowback Static Electricity Spark Natural Gas & Oil Vapors
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- 22. Typical Frac Tank Configuration
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- 31. Progression of Gas Buster Piping 2” Line 4” Line 8” Line 16” Line 24” Line The line splits at a header system. The header split, along with the increase in pipe diameter, slows the velocity of fluid!
- 32.
- 33. Gas Buster Piping and Vents
- 34. Side Vents at back of Frac Tank
- 35. Gas Buster System in Wyoming
- 36. Gas Buster System in Wyoming
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- 40.
Editor's Notes
- This is the configuration of the location. 12 frac tanks were on location. Notice how short the down comer was.
- This is the configuration of the location. 12 frac tanks were on location. Notice how short the down comer was.
- Internal lining is compromised on the side walls but most likely intact on the bottom.
- Notice the oil and water in the bottom of the tank. Remember how oil, water, sediment, natural gas, etc… generates static buildup.
- Notice the oil and water in the bottom of the tank. Remember how oil, water, sediment, natural gas, etc… generates static buildup.
- Picture of the tank after the second explosion.
- After a month of interviews and investigation we came to these conclusions.
- Gas Buster System design for Wyoming.
- Gas Buster System design for Wyoming.
- Option 2 involves flowing back into a closed top frac tank. API RP 2003 should be consulted when considering option 2.