Hydraulic Workover (Snubbing Unit) Well Control Quiz

Hydraulic Workover (Snubbing Unit) Well Control Quiz

Hydraulic workover units or snubbing units are widely used for well intervention operation. It is a cost effective way to re-work on a well without using drilling rigs which are more costly. The units can work against wellbore pressure in cased hole. Since the units work with live well, the well control must be carefully monitored as well. This well control quiz will focus mainly on hydraulic workover. There are some theory and mathematic questions. In order to maximize knowledge from this well control test, learners must take time to read questions and think before selecting any answer.


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8 Responses to Hydraulic Workover (Snubbing Unit) Well Control Quiz

  1. Mahmoud Hassan says:

    This first time see this snubbing unit well control and l’m not working on snubbing unit before.
    Thanks
    Mahmoud

  2. Decha says:

    Good for learning.snubbing this is the first time for me also.

  3. My first time I worked with snubbing unit was in Oman.last two days04/06/15. I thought is couyal tubbing units. But later I deal with it. There are some very good Advantages and disadvantages in this units.

  4. ismael says:

    This first time see this snubbing unit well control and l’m not working on snubbing unit before.
    Thanks
    ismael

  5. Reg MacDonald says:

    Using the formula for Question 9 how did you come up with 1000 psi for each jack?

  6. Reg MacDonald says:

    Force (pressure) = Pressure X Area

    Force = 3,800 x (π ÷ 4) x 3.52 = 36,560 lb

    Total Force = Force (pressure) + Force (friction)

    Total Force = 36,560 + 3,500 = 40,060 lb

    Determine pressure each jack.

    Force (pressure) = Numbers of Jack x Pressure X Area of Jack

    40,060 = 4 x Pressure x (π ÷ 4) x (52 – 3.52)

    Pressure = 1000 psi

    How did you end up with 1000psi using the above formula?

    • Well Control Quiz Team says:

      Reg,

      You solve the equation 40,060 = 4 x Pressure × (π ÷ 4) × (52 – 3.52).

      Please remember that you need to consider cross sectional of jack.

      Regards,
      Shyne

  7. Reg MacDonald says:

    Please explain this further as this is not helping me. Can you break it right down showing me how you got 1000psi please.

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