CASE PRESENTATION PETROVALVE ARTIFICIAL LIFT MARMUL OMAN Muscat May 26, 2004

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CASE PRESENTATION PETROVALVE ARTIFICIAL
LIFTMARMUL OMANMuscat May 26, 2004
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INTRODUCTION

• Common Problems before the trial
• Low pump efficiency due to conventional valves
  requiring a higher SPM.
• A higher SPM puts higher stress on surface unit
  and rods, frequent failure of ball, seat and
  cages.
• Leading to frequent breakdowns and therefore
  higher pump repair costs.
• Above problems reduce actual pump life oil
  production due to shut down.
• Higher well pulling frequency and cost.
• Lower oil production due to low pump efficiency
  of the pump.

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OBJECTIVES

• Reduce the frequency of work over entry to
  replace conventional valves due to broken seat,
  ball or cages.
• Gain oil production lost due to well shut down.
• Apply system to increase efficiency, lower SPMs
  while maintaining existing production, reduce
  strain on surface equipment and rods.
• To decrease pump maintenance cost.

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TECHNICAL ADVANTAGESOF THE GUIDED VALVE

• Avoids bouncing kicking in the sealing surface
  cage, increasing valve longevity.
• Along with the spinning motion helps in self
  lapping of the seat improving sealing efficiency.
• Helps the pump work with the same efficiency in
  vertical, deviated horizontal wells.
• Avoids turbulence effect encountered in standard
  ball seat valve, reducing gas breakout and gas
  lock condition.

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OTHER TECHNICAL ADVANTAGES

• Larger flow area increases the amount of fluid
  lifted per stroke.
• Larger flow area reduces compression stresses on
  the rods during the down stroke.
• The flat surface on top of the valve helps in
  closing the valve more quickly improving the
  efficiency of the pump.

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FLOW AREA COMPARISON
GUIDED SYSTEM VS. CONVENTIONAL BALL AND SEAT
SIZE PETROVALVE
BALL SEAT AREA INCREASE
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TRIAL RESULTS
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TRIAL RESULTS
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TRIAL SUMMARY

• Total days of continuous operation for the
  Petrovalves 2,358
• 55 increase in production using Petrovalves

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CONCLUSION

• Remarkable longevity in sandy wells.
• The wells are being pumped off more quickly when
  running with Petrovalves and with the same SPM as
  before.
• We can have the same rate of fluid lift with a
  lower SPM, saving pump wear and tear, lower pump
  break downs, longer rod life, lower power
  consumption lower intervention.

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STATUS TODAY

• The trial objective for 54 valves was approved 5
  years ago.
• During routine maintenance / inspection the
  valves were found in good condition and reusable
  after pulling.
• Two broken seats were found in the TV out of 54
  valves after a 5 year trial.
• Petrovalve has now become the standard for TVs
  and SVs at PDO.