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Types of Cement Plugs in Well Abandonment
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Types of Cement Plugs in Well Abandonment

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Questions and Answers

What is the recommended density for the best hivis pill compared to the mud?

  • 0.5 ppg greater
  • 2 ppg greater
  • 1 ppg greater (correct)
  • Equal density

    • What is the recommended yield point for the hivis pill?

  • < 50 lbf/100ft²
  • > 70 lbf/100ft² (correct)
  • = 60 lbf/100ft²
  • = 80 lbf/100ft²

    • Why is pipe reciprocation NOT recommended while placing a plug?

  • To increase rig time savings
  • To enhance fluid flow
  • To reduce waiting on cement time
  • To prevent swabbing of the fluids (correct)

    • Why is batch mixing preferred for slurry mixing?

    <p>To achieve homogeneous density</p> Signup and view all the answers

    How long is the normal waiting on cement (WOC) time recommended after placement of plugs?

    <p>12 to 24 hours</p> Signup and view all the answers

    Why should a minimum of 12 hours be used for WOC time after plug placement?

    <p>For higher compressive strength</p> Signup and view all the answers

    What does early compressive strength heavily depend on?

    <p>Thickening time</p> Signup and view all the answers

    Why is it common practice to allow for longer WOC time than necessary?

    <p>Due to unknown well temperature</p> Signup and view all the answers

    What should be done if the cement does not drill as expected after 12 hours?

    <p>Wait an additional 6 hours</p> Signup and view all the answers

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