Tag Archives: BOP

Closing Units – Surface Installations Quiz

BOP Closing Unit

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BOP closing unit is one of the well control equipment and it is very critical for the operation because it provides power to operate all the BOP rams. Personnel need to fully understand its functions, how to maintain and test it.  Therefore, this quiz will focus on the closing unit of surface installations. There are a total of 20 questions in this quiz which will help you learn and refresh your knowledge about this topic. Please feel free to drop and comments or questions in this post and we will answers your questions as much as we can. Enjoy the test.

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1. Answered
2. Review

1. Question 1 of 20

   1. Question

   What is Blowout preventer (BOP) control system?

   • It is a high pressure hydraulic power unit fitted with directional control valves to safely control kicks and prevent blowouts during drilling operations.
   • It is a system which helps control bottom pressures
   • It is a low pressure hydraulic power unit
   Correct
   Incorrect
   
2. Question 2 of 20

   2. Question

   What are the two types of accumulators available and in which sizes are they available?

   • Fat and thin types with square and octagon sizes
   • Bladder and Float types with cylindrical or ball styles
   • Hallow and swallow types with triangular and hexagon shapes
   Correct
   Incorrect
   
3. Question 3 of 20

   3. Question

   The following are the component of surface BOP control system, except:

   • Reservoir, Accumulator piping
   • Air pump assembly, Electric pump assembly
   • Standpipe manifold
   Correct
   Incorrect
   
4. Question 4 of 20

   4. Question

   Which one of the following is in-correct statement about electric pump assembly?

   • It is connected to the reservoir to provide high pressure operating fluid for BOP control system.
   • It is available in a variety of horsepower and voltage ranges.
   • It consists of a duplex or triplex reciprocating plunger type pump driven by an explosion-proof electric motor.
   Correct
   Incorrect
   
5. Question 5 of 20

   5. Question

   What are accumulator bottles?

   • They are containers which store compressed hydrogen gas.
   • They are containers which store hydraulic fluid under pressure for effectively and quickly closing the BOP.
   • They are containers which accumulate mud pits.
   Correct
   Incorrect
   
6. Question 6 of 20

   6. Question

   6. The electric pump assembly consists of a duplex or triplex reciprocating plunger type which is driven by _____. What is the correct word in the blank?

   • An explosion proof electric motor
   • A non-explosion proof electric motor
   • A hydraulic accumulator unit
   Correct
   Incorrect
   
7. Question 7 of 20

   7. Question

   What are the positions of 4-way valve?

   • Normal, left and right
   • Precharge and fully charge
   • Open, close and block
   Correct
   Incorrect
   
8. Question 8 of 20

   8. Question

   When will you put the 4-way valve in “block” position?

   • Rig move and rig repair
   • While drilling
   • While logging
   Correct
   Incorrect
   
9. Question 9 of 20

   9. Question

   Which one is the wrong statement about response time to close ram preventer?

   • The closing unit should be able to close each ram preventer within 30 seconds.
   • Closing time should not exceed 30 seconds for annular preventers smaller than 18 ¾ inches and 45 seconds for annular preventers 18 ¾ inches and larger.
   • Closing time should not exceed 45 seconds for annular preventers smaller than 18 ¾ inches and 60 seconds for annular preventers 18 ¾ inches and larger.
   Correct
   Incorrect
   
10. Question 10 of 20

    10. Question

    Which statement is correct about operating pressure and precharge requirements for accumulators?

    • The precharge pressure on each accumulator bottole should be measured during the initial closing unit installation on each well and adjusted if necessary.
    • Nitrogen gas should not be used for accumulator precharge.
    • The precharge pressure may not be checked frequently during well drilling operations.
    Correct
    Incorrect
    
11. Question 11 of 20

    11. Question

    Please fill in the blank:

    The minimum recommended accumulator volume (nitrogen plus fluid) should be determined by _________ the accumulator size factor times the calculated volume to close the annular preventer and one pipe ram plus the volume to open the hydraulic choke line valve.

    • Adding
    • Multiplying
    • Subtracting
    Correct
    Incorrect
    
12. Question 12 of 20

    12. Question

    Fill in the blank:

    As per the pump pressure rating requirement, each closing unit must be equipped with pumps that will provide a ______ pressure equivalent to the rated working pressure of the closing unit.

    • Discharge
    • Rating
    • Casing
    Correct
    Incorrect
    
13. Question 13 of 20

    13. Question

    Which one is not the correct statement regarding pump power requirement?

    • Power for closing unit pumps must be available to the accumulator at all times such that the pumps will automatically start when the closing unit manifold pressure has decreased to less than 90 % of the accumulator operating pressure.
    • Two or three independent sources of power should be available on each closing unit.
    • A dual air and electrical system is not recommended at any time.
    Correct
    Incorrect
    
14. Question 14 of 20

    14. Question

    How often do personnel need to do function test on all operation BOP equipment?

    • At least once a week
    • Every 21 days
    • Every month
    Correct
    Incorrect
    
15. Question 15 of 20

    15. Question

    What is the correct requirement about valves and fittings for closing unit?

    • All valves and fittings between the closing unit and BOP stack can be made of plastic.
    • All valves and fittings between the closing unit and the BOP stack should be of steel construction with a rated pressure at least equal to the working pressure rating of the BOP stack up to psi.
    • All valves and fittings between the closing unit and the BOP stack should be of steel construction with a rated pressure at least equal to the working pressure rating of the BOP stack up to 1,500 psi.
    Correct
    Incorrect
    
16. Question 16 of 20

    16. Question

    The closing unit control valves must be clearly marked to indicate two things. Which one is NOT correct?

    • Which preventer or choke line valve each control valve operates
    • The position of the valves i.e. open, closed or neutral
    • Pressure rating of the valve
    Correct
    Incorrect
    
17. Question 17 of 20

    17. Question

    Which fluid is suitable as closing unit control operating fluid from the following?

    • Hydraulic oil or fresh water containing a lubricant
    • Diesel oil or Kerosene
    • Motor oil
    Correct
    Incorrect
    
18. Question 18 of 20

    18. Question

    What important precaution shall be taken prior to conducting any closing unit pump capability tests?

    • Make sure that closing unit reservoir contains drilling fluid
    • Make sure that the closing unit reservoir should be inspected to ensure it does not contain any drilling fluid, foreign fluid, rocks or other debris
    • Make sure that closing unit reservoir contains debris or rocks
    Correct
    Incorrect
    
19. Question 19 of 20

    19. Question

    What is the minimum required capacity of the reservoir tank?

    • 1 time the capacity of the usable fluid capacity
    • 1.5 times the capacity of the usable fluid capacity
    • 2 times the capacity of the usable fluid capacity
    Correct
    Incorrect
    
20. Question 20 of 20

    20. Question

    During accumulator closing test, how much should be final accumulator pressure i.e. closing unit pressure?

    • It should be at least 200 psi above the precharge pressure.
    • It should be at least 500 psi above the precharge pressure.
    • It should be at least 700 psi above the precharge pressure
    Correct
    Incorrect
    

Leaderboard: BOP Closing Unit

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Component of Hydril GL Annular BOP Quiz

Component of Hydril GL Annular BOP Quiz

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Information

Annular preventer is one of the most critical well control equipment on the rig; therefore, it is very important that personnel in drilling operation should understand about it and know its components. This quiz is based on Hydril GL Annular BOP  which is commonly used on the rigs around the world. In this quiz, there are a total of 9 questions and each question points to a specific component. You need to select the right answer from three choices. Each question has answer which will help you learn if you select the incorrect answer and you will see your final score at the end of the quiz.

We wish you would enjoy doing the Hydril GL Annular BOP  Component quiz.

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1. Answered
2. Review

1. Question 1 of 9

   1. Question

   What is the component No.1?

   • Piston indicator hole
   • Wear plate
   • Packing unit
   Correct
   

   It is a piston indicator hole.

   Incorrect
   

   It is a piston indicator hole.

2. Question 2 of 9

   2. Question

   What is the component No.2?

   • Latched head
   • Opening chamber head
   • Wear plate
   Correct
   

   It is a wear plate.

   Incorrect
   

   It is a wear plate.

3. Question 3 of 9

   3. Question

   What is the component No.3?

   • Closing chamber
   • Packing unit
   • Secondary chamber
   Correct
   

   It is a packing unit.

   Incorrect
   

   It is a packing unit.

4. Question 4 of 9

   4. Question

   What is the component No.4?

   • Latched head
   • Opening chamber head
   • Opening chamber
   Correct
   

   It is a latched head.

   Incorrect
   

   It is a latched head.

5. Question 5 of 9

   5. Question

   What is the component No.5?

   • Closing chamber
   • Opening chamber head
   • Secondary chamber
   Correct
   

   It is a opening chamber head.

   Incorrect
   

   It is a opening chamber head.

6. Question 6 of 9

   6. Question

   What is the component No.6?

   • Piston indicator hole
   • Wear plate
   • Opening chamber
   Correct
   

   It is an opening chamber.

   Incorrect
   

   It is an opening chamber.

7. Question 7 of 9

   7. Question

   What is the component No.7?

   • Opening chamber
   • Piston
   • Closing chamber
   Correct
   

   It is a piston.

   Incorrect
   

   It is a piston.

8. Question 8 of 9

   8. Question

   What is the component No.8?

   • Closing chamber
   • Wear plate
   • Packing unit
   Correct
   

   It is a closing chamber.

   Incorrect
   

   It is a closing chamber.

9. Question 9 of 9

   9. Question

   What is the component No.9?

   • Opening chamber
   • Closing chamber
   • Secondary chamber
   Correct
   

   It is a secondary chamber.

   Incorrect
   

   It is a secondary chamber.

Leaderboard: Component of Hydril GL Annular BOP Quiz

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1. BLOWOUT is an uncontrolled flow of well fluids and/or formation fluids from a well bore to the surface or into lower-pressured subsurface zones (underground blowout). True False 2. BLOWOUT PREVENTER (BOP) is a valve attached to the casinghead of a well, allowing the well to be sealed at the surface and confining well fluids to the well bore. True False 3. BLOWOUT PREVENTION EQUIPMENT (BOPE) is the entire array of equipment installed at a well to control kicks and prevent blowouts. Consists of preventers, an actuating system, a choke and kill system, and auxiliary equipment. True False 4. FORMATION FRACTURE GRADIENT is the pressure per unit of true vertical depth that could be expected to fracture a formation at a particular point in the well bore. (Expressed in psi/ft.) True False 5. If BOPE inspection and/or testing is required on the division’s Permit to Conduct Well Operations (Form OG 111), inspections must be made by a division representative accompanied by the operator’s and/or contractor’s representative.

The division inspector must verify that all of the requirements for casing, BOPE, hole-fluid monitoring equipment, and pressure rating are satisfied. True False 6. In most cases, BOPE tests are conducted prior to drilling below the casing shoe or kick-off point (KOP). In situations where the casing is open to the formation, a sealing device (either cement or mechanical) must be placed as close as practical to the shoe or KOP (whichever is higher) so that the casing’s mechanical integrity can be determined. The anchor casing string, to which the BOP stack is attached, is an integral part of the BOPE and must be tested, either separately or in conjunction with the BOP stack. True False 7. When we are pressure testing blowout prevention equipment, all components of the BOP stack, kill- and choke-line valves, workingstring safety valve, internal preventer, kelly cock(s), and standpipe valve must be tested in the direction of blowout flow. Clean water should be used as the test fluid, especially in critical areas. True False 8. When selecting a suitable test pressure for the BOPE and anchor casing string, two factors need to be considered: the Maximum Predicted Casing Pressure (MPCP) for the well, and the Minimum Internal Yield Pressure (MIYP) of the anchor casing string. When testing casing in conjunction with the BOPE, the maximum pressure applied to the shoe of the anchor string (or KOP) must not exceed 125 percent of the MPCP or 80 percent of the MIYP, whichever is lower. True False 9. The following is the procedure for testing of :

The Kill-line Control Valve (Figure 27-4d)

1. Close the kill line control valve.
2. Rebuild the test pressure through the drill pipe, checking the pressure on the pump pressure gauge, the choke-manifold pressure gauge, and/ or the standpipe pressure gauge.
3. Close the standpipe valve.
4. Bleed the pressure at the pump.
5. Open the kill-line high-pressure access valve. If the system does not include this valve, it will be necessary to dismantle the check valve to check the kill-line master valve and the kill-line control valve in the direction of blowout flow.
6. If there is pressure loss, check the opening at the kill-line high-pressure access valve or look into the check valve to see if the kill line control valve is leaking.

True False 10. The following is the procedure for testing of:

Subsea Preventer Actuation Testing. In addition to the pressure testing just outlined, each of the preventers in the subsea stack must be actuated according to the following schedule:

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1. Each of the pipe-ram preventers must be tested for actuation before pulling drill pipe out of the hole on each trip, or at least once each 24 hours.
2. The annular preventers need not be actuated during this pretrip function testing as long as they are being operated during the required weekly pressure tests or at an interval not greater than once each seven days.
3. Periodic actuation-testing is not required for the blind or blind-shear rams. These rams need only be tested when installed and prior to drilling out after each casing string has been set.

True