260 questions and answer for technical interviews PDF

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‫للا الرحمن الرحيم‬฀ ‫بسم‬ ْْ ِ ‫ٱلَ) ْرض‬

‫صدق هللا العظيم‬

َ ‫ج‬ َ ‫ او َي َما‬฀َ‫ف ۖ ٓ َاءأَم‬ ‫بد‬ َ‫ ف‬฀ََ ‫نفعٱلن‬ ‫فثى‬ ‫ٱلز فَ َي ْذهَب‬ َ ‫ ا‬฀َ฀َ‫(فَأَم‬ ِ ‫اس َي ْمك‬

‫لتكن البدية باجمل الكالم من كتاب هللا‬ ‫بسم هللا الرحمن الرحيم‬ ‫(وقل اعملوا فسيرى هللا عملكم ورسوله والمؤمنون وستردون إلى عالم الغيب والشهادة فينبئكم بما‬ )‫كنتم تعملون‬ ‫صدق هللا العظيم‬ ‫الرحيم‬ ‫بسم هللا الرحمن‬ ฀َ ْ ْ ‫ ي جْ زَ اه الْ َجزَ ا َء‬฀َ‫ثي مر‬ َ ْ‫يس ْ ِل ِْل‬ َ َ ‫ ِإ‬฀َ‫فَىأَ َون‬ ฀َ ‫ل‬ ‫إ‬ ‫ان‬ ‫س‬ ฀َ ‫لى‬ )‫ب ِركَ الْم نْتَه‬ ‫س‬ ‫ه‬ ‫ي‬ ‫ع‬ ‫س‬ ‫و‬ ‫ى‬ ‫ع‬ ‫س‬ ‫ا‬ ‫م‬ ‫ىو َف‬ ‫ال َو‬ ‫ن‬ ‫أ‬ ْ َ َ‫) َ أَو ْن ل‬ َْ َ َْ َ َ َ َ ِ ِ َ ‫ن‬ ‫صدق هللا العظيم‬

‫هللا‬ ‫هذا العمللوجه‬ Content 260 questions and answer for technical interviews Questions and answer interview ADNOC DRILLING Questions and answer NABORS Questions and answer Schlumberger Other questions and answer from many technical interviews Reference Well control courses Stuck pipe courses Summary of the engineer Tamer Al-Najjar, this man He contributed to increasing his knowledge a lot of people

Interview Questions General Questions Collected by: tamer Kotb

‫للا الرحمن الرحيم‬฀ ‫بسم‬ ‫صدق هللا العظيم‬

ْْ ِ ‫ٱلَ) ْرض‬

َ ‫ٱلز فَ َي ْذهَبج‬ َ ‫ او َي َما‬฀َ‫ف ۖ ٓ َاءأَم‬ ‫بد‬ َ‫ ف‬฀ََ ‫نفعٱلن‬ َ ‫ ا‬฀َ฀َ‫(فَأَم‬ ‫فثى‬ ِ ‫اسيَ ْمك‬

1. Tell me about yourself (name, age, nationality, education, health and single or married)? 2. Describe your personal attitude in five words? 3. What have you learned from your mistakes? 4. How you deal with an angry subordinate or client representative? 5. What do you do in free time (your hobbies)? 6. Is your position for supervising or doing the jobs? 7. Why did you leave your last company, why you are joining us? 8. Does mechanic/electrician work under your supervision or they are belonging to maintenance superintendent/manager? 9. How you prefer receive instructions from client representative, verbal or written? 10. How much $$$ money do you expect if we offer this position to you?

Technical Questions:

Collected by: tamer Kotb

‫للا الرحمن الرحيم‬฀ ‫بسم‬ ‫صدق هللا العظيم‬

ْْ ِ ‫ٱلَ) ْرض‬

َ ‫ٱلز فَ َي ْذهَبج‬ َ ‫ او َي َما‬฀َ‫ف ۖ ٓ َاءأَم‬ ‫بد‬ َ‫ ف‬฀ََ ‫نفعٱلن‬ َ ‫ ا‬฀َ฀َ‫(فَأَم‬ ‫فثى‬ ِ ‫اسيَ ْمك‬

1. What type (drilling/work over) and size (HP) of rigs you worked on, SCR/VFD/Mechanical, Cyber chair, Joystick? 2. How many years of experience in drilling/work over business? How long you been in the position you are applying for? (All this questions answer depending on your status) 3. Rig maintenance is not of your duty it is the maintenance department concern only, True or False? - False 4. Where do we use Nitrogen gas on the rig and why? - We use Nitrogen gas in Accumulator Bottles, Pulsation Dampener, and Surge Bottle. - Because Nitrogen Gas is nonflammable, an inert gas at standard temperature and pressure. 5. What are the positions (open/close) of the 4 way valves while drilling for BOP equipment (Annular, Top Ram, Blind Ram, HCR valves)? - Annular, Opened. - Top Ram, Opened. - Blind Ram, Opened. - HCR Valves, Closed.

6. What are the pressure readings for annular, manifold, and accumulator gauges on the BOP closing unit? - Annular, 600 – 1500 psi. Collected by: tamer Kotb

‫للا الرحمن الرحيم‬฀ ‫بسم‬ ‫صدق هللا العظيم‬

ْْ ِ ‫ٱلَ) ْرض‬

َ ‫ٱلز فَ َي ْذهَبج‬ َ ‫ او َي َما‬฀َ‫ف ۖ ٓ َاءأَم‬ ‫بد‬ َ‫ ف‬฀ََ ‫نفعٱلن‬ َ ‫ ا‬฀َ฀َ‫(فَأَم‬ ‫فثى‬ ِ ‫اسيَ ْمك‬

- Manifold, 1500 psi. - Accumulator, 3000 psi. 7. Which pressure reading we can adjust from rig floor remote panel? - Annular pressure only can be regulated and adjusted from remote panel when selector valve put on "Remote" position. 8. What valves we should have on rig floor to secure drill string in case well flows, which one we install first? - Safety Valve "TIW" in open position. - Gray Valve. - We should stab Safety valve in first. 9. What will you do if the well kicks while tripping? - Shut the well in according to client shut in method: - For Hard shut in; a) Stab in safety valve, close it. b) Space out. c) Close annular/top ram. d) Open HCR valve. F) Record shut in pressure and pit gain. - For Soft shut in; a) Stab in safety valve, close it. b) Space out. c) Open HCR valve. d) Close annular/top ram. e) Close remote choke. F) Record shut in pressure and pit gain. Collected by: tamer Kotb

‫للا الرحمن الرحيم‬฀ ‫بسم‬ ‫صدق هللا العظيم‬

ْْ ِ ‫ٱلَ) ْرض‬

َ ‫ٱلز فَ َي ْذهَبج‬ َ ‫ او َي َما‬฀َ‫ف ۖ ٓ َاءأَم‬ ‫بد‬ َ‫ ف‬฀ََ ‫نفعٱلن‬ َ ‫ ا‬฀َ฀َ‫(فَأَم‬ ‫فثى‬ ِ ‫اسيَ ْمك‬

10. How to protect crown block and rig floor against top drive/travelling block movement up and down, two answers? - By pre-setting value of high travel stop and high travel limit to save crown block; and setting value for low travel stop and low travel limit to save rig floor. - Or by setting Crown O-matic to save crown block. (When you adjusted Crown o-matic used stand) 11. What is the ton mile? Where we use it? - Ton mile is the unit of service given by a drilling line in moving 1 ton of load over a distance of 1 mile. - We use it in slip & cut operation. 12. What is the measuring unit on casing tong torque gauge? What is the measuring unit on the line pull DP make up torque gauge? - Measuring unit of Casing torque and roughneck gauge is (lbf.ft) - Measuring unit of line pull DP make up torque gauge is (lbf) = (lbf.ft) divided length rig tong arm 13. After changing liner size of the mud pump what equipment on the mud pump should be readjusted? - Adjust pressure Relief Valve. 14. When swab/surge pressure will be more, in a small or large annulus? - In Small annulus will be more because there is no clearance between BHA and wellbore wall. 15. What does it mean if pressure dropped 500 psi suddenly while normal drilling, mud pumps ok? - Lost bit nozzle. Collected by: tamer Kotb

‫للا الرحمن الرحيم‬฀ ‫بسم‬ ‫صدق هللا العظيم‬

ْْ ِ ‫ٱلَ) ْرض‬

َ ‫ٱلز فَ َي ْذهَبج‬ َ ‫ او َي َما‬฀َ‫ف ۖ ٓ َاءأَم‬ ‫بد‬ َ‫ ف‬฀ََ ‫نفعٱلن‬ َ ‫ ا‬฀َ฀َ‫(فَأَم‬ ‫فثى‬ ِ ‫اسيَ ْمك‬

16. Which formation fluid migrates in a shut in well? - Gas kicks type. 17. Will you reuse a BOP flange ring gaskets to save some money? - Ring gaskets are not reusable according to API. 18. To open BOP bonnets for changing the ram, which position the 4 way valve, should be operated, open/close? - 4way valve should be operated Close position. 19. How do you know if you are differentially stuck? - Free circulation. - No up/down movement. - No rotation. - Increase pipe stretch and torque. 20. In the hard shut in procedure what will be the hydraulic choke position, open/close? - Close position. 21. Working on a stuck pipe using a drilling jar, after the jar is fired, what should you do to repeat the jarring action? - You should re-cock the jar to the neutral position.

22. If the make-up torque is 60,000 ft.lb, How much line pull you will apply on the line pull torque gauge (torque arm length = 5 Ft.)? - Torque = Pull force X Arm Length - 60,000 = Pull force X 5 Collected by: tamer Kotb

‫للا الرحمن الرحيم‬฀ ‫بسم‬ ‫صدق هللا العظيم‬

ْْ ِ ‫ٱلَ) ْرض‬

َ ‫ٱلز فَ َي ْذهَبج‬ َ ‫ او َي َما‬฀َ‫ف ۖ ٓ َاءأَم‬ ‫بد‬ َ‫ ف‬฀ََ ‫نفعٱلن‬ َ ‫ ا‬฀َ฀َ‫(فَأَم‬ ‫فثى‬ ِ ‫اسيَ ْمك‬

- Pull force = 60,000/5 = 12,000 lbf 23. Five stands drill pipe pulled out of the hole it took only 2.5 bbl. and the hole filled up; calculated volume of the 5 stands is 4 bbl., what does this mean to you? - That mean the well is not taking proper amount of mud. - There is probability of formation fluid enter the well "influx". - You have to stop and make flow check; if positive, shut in the well immediately and if negative, run back to bottom and circulate bottom up. 24. Mud pump dressed with 6" liner, 10" stroke, what will be the pump output, bbl. /stoke? - Pump Output = 0.000243 X (Liner Size) 2 X Stroke Length X Pump out put - = 0.000243 X (6)2 X 10 X .97 = 0.0848 bbl. /stoke 25. What is the main purpose of Blind/Shear rams? a. To shear tubular like drill pipe while simultaneously sealing the hole. b. To shear tubular like drill pipe without sealing the hole. C. To effect a seal with drill collars in the hole. 26. A BOP hydraulic control unit accumulator bank has 20, 10 gallon cylinders. Accumulator pre-charge pressure - 900 psi. Accumulator operating pressure - 3,000 psi. Minimum accumulator operating pressure - 1,200 psi. Calculate the total usable fluid volume for the accumulator bank? A. 200 gallons.

Collected by: tamer Kotb

‫للا الرحمن الرحيم‬฀ ‫بسم‬ ‫صدق هللا العظيم‬

ْْ ِ ‫ٱلَ) ْرض‬

َ ‫ٱلز فَ َي ْذهَبج‬ َ ‫ او َي َما‬฀َ‫ف ۖ ٓ َاءأَم‬ ‫بد‬ َ‫ ف‬฀ََ ‫نفعٱلن‬ َ ‫ ا‬฀َ฀َ‫(فَأَم‬ ‫فثى‬ ِ ‫اسيَ ْمك‬

B. 100 gallons. C. 90 gallons. (900/1200)- (900/3000) = 4.5x 20cylinders D. 50 gallons 27. What is the purpose of having stored fluid under pressure in the accumulator bottles? (Two Answers) a. To store hydraulic fluid. B.To enables the BOP to be closed in the event of a power failure. c. To activate the emergency packing on the Rams. d. To operate the remote choke. e. To reduce the closing time of BOP functions. 28. In a control unit 3 position/4 way valves are used. Which of the following statements are true? (Three answers) a. Can be manually operated. b. They cannot be remotely operated. c. They can be placed in 4 positions. d. They have four active connections (inlets/outlets). e. Can be placed in 3 positions. 29. ALL ram type BOPs are designed to close on Rated Working Pressure is acting from bottom in the well bore with manifold pressure is 1,500 psi? A. True. B. False. 30. After connecting the open and close hydraulic lines to the surface installed BOP stack which of the following action shall be taken first?

Collected by: tamer Kotb

‫للا الرحمن الرحيم‬฀ ‫بسم‬ ‫صدق هللا العظيم‬

ْْ ِ ‫ٱلَ) ْرض‬

َ ‫ٱلز فَ َي ْذهَبج‬ َ ‫ او َي َما‬฀َ‫ف ۖ ٓ َاءأَم‬ ‫بد‬ َ‫ ف‬฀ََ ‫نفعٱلن‬ َ ‫ ا‬฀َ฀َ‫(فَأَم‬ ‫فثى‬ ِ ‫اسيَ ْمك‬

a. Drain the accumulator cylinders and check the nitrogen recharge pressure. b. Function tests all items on the stack. c. Place all functions in neutral position and start pressure testing the BOP stack. d. Perform accumulator unit pump capacity test. 31. You close a ram on the Driller's remote B.O.P control panel. The close light for that function illuminates but you notice that the manifold pressure gauge does not drop. What has happened? a. Air supply has been lost to the Driller's panel b. 4-way ram valve on accumulator unit has failed to shift c. Blockage in line between accumulator unit and B.O.P stack d. You forgot to hold down the master control valve for 5 seconds as instructed. 32. Packer made of which rubber material is suited for an annular BOP used in extreme cold conditions? Select two. a. Neoprene. b. Nitrile. c. Natural. 33. If the “UNIT/REMOTE switch on a surface BOP hydraulic control unit is placed in “UNIT” position, which of the following is true? (TWO ANSWERS) a. All BOP functions can be operated from the Driller’s Remote BOP Control panel. b. No BOP functions can be operated from the Driller’s Remote BOP Control panel. c. The hydraulic annular pressure regulator cannot be adjusted from the Driller’s remote BOP Control Panel. d. The air-operated pumps are isolated.

Collected by: tamer Kotb

‫للا الرحمن الرحيم‬฀ ‫بسم‬ ‫صدق هللا العظيم‬

ْْ ِ ‫ٱلَ) ْرض‬

َ ‫ٱلز فَ َي ْذهَبج‬ َ ‫ او َي َما‬฀َ‫ف ۖ ٓ َاءأَم‬ ‫بد‬ َ‫ ف‬฀ََ ‫نفعٱلن‬ َ ‫ ا‬฀َ฀َ‫(فَأَم‬ ‫فثى‬ ِ ‫اسيَ ْمك‬

34. What is the reason for operating the master air valve for 5 seconds prior to the function on a remote B.O.P. panel is: a. To check the rig air pressure is correct. b. To allow a buildup of air pressure to operate the 3 position valve. c. To bleed air from the system. d. To give the operator time to think about what he is doing. 35. When testing a Surface BOP stack with a test plug, the side outlet valves below the plug should be kept in the open position. (Two Answers) A. Because the test will create extreme hook loads. B. Because of potential damage to casing/open hole. C. Otherwise reverse circulation will be needed to release test plug. D. To check for a leaking test plug.

36. In what position should 4-way valves be kept on the BOP hydraulic control unit while drilling? a. All open. b. All closed. c. All in the neutral. d. Some Open or closed.(annular open, top ram open, bottom ram open, blind ram open, kill line& HCR hydraulic valves close) 37. The main functions of the “weep hole” on ram type B.O.P is to :( Two answers) a. Show the bonnet seal is leaking.

Collected by: tamer Kotb

‫للا الرحمن الرحيم‬฀ ‫بسم‬ ‫صدق هللا العظيم‬

ْْ ِ ‫ٱلَ) ْرض‬

َ ‫ٱلز فَ َي ْذهَبج‬ َ ‫ او َي َما‬฀َ‫ف ۖ ٓ َاءأَم‬ ‫بد‬ َ‫ ف‬฀ََ ‫نفعٱلن‬ َ ‫ ا‬฀َ฀َ‫(فَأَم‬ ‫فثى‬ ِ ‫اسيَ ْمك‬

b. Show the primary mud seal on the piston rod is leaking. c. Release any overpressure that may occur during testing. d. Prevent damage to the opening chamber. 38. Most of the conventional front packer elements fitted on ram BOPs are enclosed between steel plates. What are the main reasons for this type of design? (TWO ANSWERS) a. To support the weight of the drill string during hang-off. b. To prevent the rubber extruding top and bottom when the rams are closed (to prevent damage to the elastomer between pipe and ram block when well is under pressure). c. To feed new rubber into sealing contact with the pipe when the sealing face becomes worn. d. To prevent any expansion of elastomer due to heat. 39. At what pressure a W.P 15,000 psi BOP body is subjected to shell test according to API recommendations? A.15, 000 psi. B.17, 500 psi. C. 20,000 psi. D.22, 500 psi. (15,000 X 1.5) E. 25,000 psi 40. What is the meaning of “Closing Ratio” for a ram type BOP - as defined by API RP53? a. The ratio between BOP rated working pressure and well head pressure. b. The ratio of the wellhead pressure to the pressure required to close BOP. c. The ratio between opening and closing time. d. The ratio between BOP rated working pressure and hydraulic control unit working pressure.

Collected by: tamer Kotb

‫للا الرحمن الرحيم‬฀ ‫بسم‬ ‫صدق هللا العظيم‬

ْْ ِ ‫ٱلَ) ْرض‬

َ ‫ٱلز فَ َي ْذهَبج‬ َ ‫ او َي َما‬฀َ‫ف ۖ ٓ َاءأَم‬ ‫بد‬ َ‫ ف‬฀ََ ‫نفعٱلن‬ َ ‫ ا‬฀َ฀َ‫(فَأَم‬ ‫فثى‬ ِ ‫اسيَ ْمك‬

41. Can ALL ram type BOPs close on Rated Working Pressure in the well bore when the hydraulic operating pressure is 1,500 psi? a. Yes b. No 42. Ram type preventers are designed to hold pressure. a. Hold pressure only from above. b. Hold pressure only from below. c. Hold pressure from both above and below. 43. What is the purpose of the by-pass valve on a surface BOP Hydraulic Control Unit? a. To bleed the accumulator fluid back to the reservoir. b. To by-pass the 4-way valves. c. To enable full accumulator pressure to be placed on the annular BOP. d. To enable full accumulator pressure to be placed on the Ram/HCR closing unit manifold. 44. When testing a pipe ram at the weekly BOP test you are informed that the weep hole on ram is leaking. What action should be taken? a. The weep hole only checks the closing chamber seals leave it till the next maintenance schedule. b. Energize emergency packing. If leak stops, leave it till the Next maintenance schedule. c. A leak is normal because the metal to metal sealing face in the bonnet needs some lubrication to minimize damage. d. Ram packing elements on the ram body are worn out, replace immediately.

Collected by: tamer Kotb

‫للا الرحمن الرحيم‬฀ ‫بسم‬ ‫صدق هللا العظيم‬

ْْ ِ ‫ٱلَ) ْرض‬

َ ‫ٱلز فَ َي ْذهَبج‬ َ ‫ او َي َما‬฀َ‫ف ۖ ٓ َاءأَم‬ ‫بد‬ َ‫ ف‬฀ََ ‫نفعٱلن‬ َ ‫ ا‬฀َ฀َ‫(فَأَم‬ ‫فثى‬ ِ ‫اسيَ ْمك‬

e. Primary ram shaft seal is leaking, you should replace it immediately, (not forget to secure the well). 45. On which gauges on a remote BOP control panel would a reduction in pressure be observed when the ram preventer is being closed? (TWO ANSWERS) a. Air Pressure Gauge. b. Accumulator Pressure Gauge. c. Manifold Pressure Gauge. d. Annular Pressure Gauge. 46. On a driller’s remote B.O.P. control panel you close the annular preventer and the close light illuminates. What is the light telling you? A. A hydraulic signal has been sent to the accumulator unit. B. The annular has closed. C. The annular 4 way valve on the accumulator unit has functioned and fluid should be going to the annular. D. A micro switch in the back of the Driller’s remote B.O.P. E. control panel has been activated, indicating that you have pushed the lever to the close position. 47. What are the factors affect the penetration rates? -Formation type -Weight on bit WOB -Flow rate -Rounds per minute (RPM) 48. What is the maximum weight that can be used from the BHA for WOB? -85% of BHA Weight to avoid buckling. 49. Define the type of stuck related with the following? -High permeable formation and filter cake ......differential stuck -Deviated wells, dog leg .......well bore geometry -Unable to move up or down unable to rotate unable to circulate....mechanical stuck

Collected by: tamer Kotb

‫للا الرحمن الرحيم‬฀ ‫بسم‬ ‫صدق هللا العظيم‬

ْْ ِ ‫ٱلَ) ْرض‬

َ ‫ٱلز فَ َي ْذهَبج‬ َ ‫ او َي َما‬฀َ‫ف ۖ ٓ َاءأَم‬ ‫بد‬ َ‫ ف‬฀ََ ‫نفعٱلن‬ َ ‫ ا‬฀َ฀َ‫(فَأَم‬ ‫فثى‬ ِ ‫اسيَ ْمك‬

-Unable to move up or down unable to rotate and able to circulate....differential stuck 50. What is the maximum allowable over pull while POOH in Vertical and horizontal well? -20klbs 51. We can use separator while drilling instead of vacuum degassed why? (True or false) False.....Separator can only be used while killing a well 52. What are the causes of shale to sloughs into the hole? -Mechanical vibration of drill string -In correct mud parameter (high water loss and mud weight) -Deviation angel 53. What is the ADNOC Drilling Company? ADNOC is the largest drilling contractor in the Middle East, providing its clients with quality drilling, work-over, and well maintenance services while maintaining the highest safety, integrity, and environmental standards and also implementing the best international practices of quality, efficiency, and enhancing productivity.

54. What is drilling (BHA) to set 30" conductor pipe? Whatever to run casing 30" or conductor pipe 30" We need hole 36" (BHA) consist: 36"Bit 36" near bit stab 9 ¾" CD XOS 8 ¼" DC OR *Bit 36" connection 8 5/8 R *Chock sub 12" connection 8 5/8 pin H90x 8 5/8boxH90 *1 N/bit stabilizer 36"connection 8 5/8 R box x 8 5/8 H90 box *2 string stabilizer 36" connection 8 5/8H90 pin x 8 5/8 boxH90 *1 stand DC 14" connection 8 5/8H90 pin x 8 5/8 boxH90 *XOS connection 8 5/8 pinH90 x 7 5/8 boxH90 *1 stand DC 10" connection 7 5/8 pinH90 x 7 5/8 boxH90

Collected by: tamer Kotb

‫للا الرحمن الرحيم‬฀ ‫بسم‬ ‫صدق هللا العظيم‬

ْْ ِ ‫ٱلَ) ْرض‬

َ ‫ٱلز فَ َي ْذهَبج‬ َ ‫ او َي َما‬฀َ‫ف ۖ ٓ َاءأَم‬ ‫بد‬ َ‫ ف‬฀ََ ‫نفعٱلن‬ َ ‫ ا‬฀َ฀َ‫(فَأَم‬ ‫فثى‬ ِ ‫اسيَ ْمك‬

*XOS connection 7 5/8 pinH90 x 6 5/8 box R 3 stand DC 81/4" connection 6 5/8 pin R x 6 5/8 box R *Drilling jar 81/4" connection 6 5/8 pin R x 6 5/8 box R *1 Stand DC 8 1/4" connection 6 5/8 pin R x 6 5/8 box R *XOS connection 6 5/8 pin R x 6 5/8 FH *3 stand HWDP 6 5/8" connection 6 5/8 pin FH x 6 5/8 FH *XOS connection 6 5/8 pin FH x box VX54 *5 stand HWDP 5 1/2 connection VX 54 pin x box VX54 *Then DP 5 ½ to (TD)

55. TDS11 what (S) and (A) stand for? (s) Is means: system (A) Is means: assist 66. How many motors in top drive? *Top drive NOV TDS11-SA Top drives have 7 motors, 5 motor electric, 2 motor mechanical. *Electric motor: 2 main motor each one 400hp, 1 oil motor, 2 blower motor *Mechanical motor: 1 gear motor, 1 shot pin motor (RLA) rotating link adaptor

67. How many cables connected to top drive? *Top drive NOV TDS11-SA -3 power cables for each main motor -1 aux cable -1...