1. How does the expansion rate of gas in the horizontal section compare to the vertical section as it is circulated out of the well?

2. Why is MD used to calculate ECD instead of in the well?

3. The formation pressure at 12,000 TVD/13,300 MD is 7,500 psi. The mud weight in the hole is 11 ppg. How much back pressure is enough to bring the BHP up to control formation pressure?

4. You are circulating a gas kick out of the well using the Driller's method. What would normally happen to active pit level during the circulation?

5. What pressure is held constant during the first circulation of the Driller's Method?

6. You are drilling ahead with a 12.25-inch Bit with an average ROP of 95 feet/hour. For the last 60 minutes there has been no change to the pit level. What action would you take?

7. You are drilling a section of well with a kick tolerance window indicating a maximum allowable kick volume of less than the rig has shown they can successfully detect and shut in. What action could be taken?

8. A well is shut in and a gas kick migrates 1000 feet with no expansion in the annulus. Well Information:
Gas Volume = 20 bbl
Total Depth = 6,000ʹ MD and TVD
Casing Shoe = 2,200ʹ MD and TVD
Open Hole = 8.5ʺ
Mud Weight = 8.33 ppg
What is the increase in bottom hole pressure due to gas migration? Assume no losses to the formation.

9. The rig team has just calculated Kick Tolerance for a range of Kick Intensities, and the operational Kick Tolerance Window is provided below.
From the graph, determine the maximum volume of gas that can be swabbed into the well (0 ppg Kick Intensity), shut-in and circulated out without breaking down the shoe?

10. During a well kill operation what pressure do we want to keep the bottom hole pressure at least equal to?

11. While drilling the top-hole section on a surface stack rig, a shallow gas flow is encountered. What is the safest action to secure the safety of the rig and personnel on the rig?

12. Reduced mud weight causes kick, how could mud weight be accidentally reduced?

13. Where is the best place to put a heavy pill?

14. On a surface stack rig, a salt-water kick with no associated gas was encountered and the well was shut in. If drill string has drill pipe and drill collars, when will the surface casing pressure be maximum during the well kill?

15. What is the purpose for having the flow line capable of venting to the Mud Gas separator?

16. A well is shut-in with stabilized SICP = 500 psi. The Driller pumped at 5 SPM until float was bumped and pump shut down. The Casing pressure gauge now reads 575 psi and the drill pipe gauge = 380 psi. What is the SIDPP?

17. During the first circulation of the Driller's method, casing pressure starts to increase and after the lag time the drill pipe pressure starts to increase. What could be the problem?

18. What should happen while making stripping through annular?

19. What increases the risk of surging when running casing in the hole?

20. What is the main function of the choke in the overall BOP system?

21. What measures can be taken to prevent "blow-through" .in a mud gas separator?

22. Which are not main components of an RCD system?

23. Why do we pressure test a cement job?

24. When using the Wait and Weight method to circulate kill mud down to the bit, the drill pipe pressure should:

25. Why is the Mud Weight measured at the Shakers at regular intervals?

26. What effect will an expanding gas bubble have on ECD as it is circulated out of a well?

27. What is the correct definition of Permeability?

28. You close a ram preventer using the remote BOP panel the ram open light goes out and the close light illuminates but you notice that the accumulator pressure has remained static. What has happened?

29. If the company policy states that the killing method used to control the well should minimize the pressure on BOP & upper casing, what will be the right method to kill the well?

30. What is the main function of the choke in the overall BOP system?

31. What is the main reason for a trip drill ?

32. What is the function of vent/ bleed/ straight through line in the choke manifold?

33. If a well is shut in with 0 psi SICP and 435 psi SIDPP, what is the reason for zero SICP?

34. A 30.0 bbls 14.5 ppg slug is pumped prior to tripping out of the hole. Mud Weight is 12.3 ppg. What mud volume, in addition to the slug volume, should we expect returned due to the slug  u-tubing into position?

35. The Driller has successfully shut-in on a kick. Which one of the following would you delegate to a crewmember?

36. You shut in a kick but do not know the slow circulating rate pressure. What procedure should you use to obtain the correct initial circulating pressure (ICP)?

37. The Mud Engineer starts the degasser and the desilter. What will happen to flow rate from the well?

38. A weighted pill is pumped into the well. As the pipe is pulled out of the pill, what will happen to bottom hole pressure?

39. Which are not main components of an RCD system?

40. What is the purpose of a flame arrester in the flare stack (end of the vent line on a separator?

41. During a well kill on a surface BOP installation, the pump rate is increased while holding drill pipe pressure constant. How will this affect Bottom-hole Pressure (BHP}?

42. How do you know that a self-fill float is plugged?

43. During a well kill operation what pressure do we want to keep the bottom hole pressure at least equal to?

44. You have shut-in on a well and are planning a kill operation. The Mud Engineer estimates it will take 3200 sacks of barite to weight up the fluid system to kill weight. The rig has 2500 sacks of barite onsite and more will not arrive for 3 days. Shut in pressures have increased since the well was shut in indicating gas migration. The shoe strength is a concern if pressures continue to build. Which Kill Method would be the best to implement

45. You run back to the shoe and carry out a slip-and-cut on the drilling line. The operation normally takes 60 minutes. What is the best way to monitor the well?

46. You have shut-in on a well and are planning a kill operation. The Mud Engineer estimates it will take 3200 sacks of barite to weight up the fluid system to kill weight. The rig has 2500 sacks of barite onsite and more will not arrive for 3 days. Shut in pressures have increased since the well was shut in indicating gas migration. The shoe strength is a concern if pressures continue to build. Which Kill Method would be the best to implement

47. When running in the hole with casing what is a benefit of routine fill-ups?

48. What is the equivalent mud weight at 10,000 ft TVD with 10.0 ppg and 260 psi of surface pressure?

49. What term means "an undesired influx of formation fluids into the wellbore"?

50. An influx has been circulated out of the well with the well control choke using the driller method's first circulation. The well is balanced with a Final Circulating Pressure of 600 psi @ 200 GPM. What will happen to casing pressure if circulation is stopped, and the choke is closed?

51. What will happen to friction pressure as the drilling fluid moves from around the bottom hole assembly to around the drillpipe?

52. You close a ram preventer using the remote BOP panel the ram open light goes out and the close light illuminates but you notice that the accumulator pressure has remained static. What has happened?

53. Slow circulating rate pressure= 300 psi at 30 SPM

The well has been shut in after a kick:

Shut In Drill Pipe Pressure           600 psi

Shut In Casing Pressure   750 psi

Before starting to kill the well, there is a complete power failure at the pumps.

Which pressure should be kept constant in order to maintain the correct bottom hole pressure if the influx migrates?

54. After successfully shutting-in on a kick, which of the following is a crucial responsibility of the Supervisor?

55. You are running a non-shearable tool in the hole on a surface stack rig. What option is available to the Driller if the well flows when the tool is across the BOP stack?

56. A well 9,850 feet (TVD) is filled with 9.2 ppg brine. The plan is to run in the hole to 6,200 feet TVD (6,600 feet measured depth) and displace with drill water of 8.4 ppg. Calculate the hydrostatic pressure at 9,850 feet when the drill water has been circulated back to the surface?

57. An open well is full of clean fluid and you are not circulating. What is the Bottom Hole Pressure (BHP)?

58. While drilling ahead, a long flowback happened, the driller stopped drilling and closed the BOP. After checking the SIDPP & SICP, there was 150 psi in both. What should be the next action?

59. While maintaining FCP (Final Circulating Pressure) you make an adjustment to the choke. The amount of time it takes to see the pressure change on the drill pipe gauge is called

60. While tripping into the hole at 6,000 ft. a flow check is positive. The rig procedure is to shut the well in using the hard shut in procedure. What is the correct procedure to shut in?

61. While tripping out of the hole, the Assistant Driller (AD) has noted improper hole fill: After pulling five stands, the hole has taken no fluid from the trip tank. It should have taken three barrels. The AD informs the Driller of the problem. What is the action should the Driller take?

62. A trip sheet was prepared while a tripping out operation, a record for the trip tank volume was taken every 5 stands, by checking the trip sheet, at which record was the first evidence that abnormal pressure occurred?

(5 stands = 3.78 bbl’s)

63. What is the correct definition of Porosity?i

64. Why must you leave spare capacity in the active pit system when circulating out a kick?

65. What is the generally accepted minimum number of barriers that must be in place and tested for most drilling operations?

66. Before cutting the drilling line, with the bit at the casing shoe, which item of equipment must be installed to improve well control capability ?

67. During the 2nd Circulation of the Driller's Method, kill weight mud is returning at the shakers. The well is shut in correctly. What should the pressure gauges read assuming no trapped pressure in the well?

68. What action should a Driller take if a sudden increase m mud gas level is recorded?

69. What is the percentage of void space in a formation?

70. The results of a flow check are inconclusive due to the small volume of returns from the well. Which of the following is the most accurate way to determine if the well is flowing?

71. You shut in a kick but do not know the slow circulating rate pressure. What procedure should you use to obtain the correct initial circulating pressure (ICP)?

72. During the 2nd Circulation of the Driller's Method, kill weight mud is returning at the shakers. The well is shut in correctly. What should the pressure gauges read assuming no trapped pressure in the well?

73. A well is shut in on a kick and the shut-in pressures on the gauges have stabilized. The SIDPP reads 350 psi and the SICP reads 900 psi. What is happening in the well?

74. If you cannot confirm that trip displacements are correct when pulling out of the hole, what should you do?

75. In a well with the Bit to Shoe volume greater than drill string volume, which of the following kill methods will minimize the risk of losses?

76. Why is it important to calculate the number of strokes from the bit to casing shoe?

77. What is the definition of fracture pressure?

78. In a well with the Bit to Shoe volume greater than drill string volume, which of the following kill methods will minimize the risk of losses?

79. What is the correct definition of Porosity?

80. A 500-foot long cement plug is set inside the casing shoe. The mud in the hole is to be displaced to a new mud density. Mud density below the cement plug = 11.8 ppg

New mud density = 12.8 ppg

Top of cement plug= 8200 feet

I f the plug failed and allowed pressure to pass between the top and the bottom of the plug, what would happen to the bottom hole pressure?