Snubbing Operations 2 Snubbing Operations SNB-(number) 1 / 20 What test provides a physical check of the performance of the BOP closing system to make sure the system has sufficient pressure and hydraulic fluid to satisfy API 53 requirements? Total system Check BOP Accumulator Drawdown Test Deadman Test BOP function Test 2 / 20 How does the loss of pre-charge pressure affect the function of a BOP system? Loss of functioning all components Pipe rams will not function Over-pressure component All of the above 3 / 20 Which of the following could be a result of loss circulation? Loss in hydrostatic pressure causing an influx Tubing damage Increase in string weight Swabbing 4 / 20 Calculate the buoyant string weight, for 9,000’ of 8.6 ppf open-ended tubing in a 9.2 ppg fluid column. 71,912 lbs 66,690 lbs 66,512 lbs 77,400 lbs 5 / 20 Which of the following can be used as a barrier element in snubbing operations? Trip tank Fluid pump Downhole check valve Mud gas separator 6 / 20 What additive needs to be included in completion fluids to limit loss control? Calcium carbonate Antifreeze Oil based mud Zinc 7 / 20 Which of the following could be used as a fluid barrier? Brine Check valve Gas column Cement 8 / 20 How can hydrates complicate well control? Reduces fluid weight Trapped pressure giving incorrect surface pressure reading Increases temperature Increases fluid weight 9 / 20 What is the best way to confirm a primary fluid barrier failure? Check fluid temperature Test fluid density with a scale Increase surface pressure when shut-in Increase in fluid temperature 10 / 20 There are numerous considerations when determining if a wellhead or tree bending stress integrity analysis is needed. Identify the most important operation or limiting factor. Normal running of tubular Milling cement Pump pressure Dynamic load impact 11 / 20 What is considered an internal snubbing barrier? Stab-in/safety valve Fluid weight Annular Stripper ram 12 / 20 What is a reason for de-rating the maximum safe working pressure of well control equipment? Leaking seal Leaking BOP Corrosion Incorrect elastomers 13 / 20 Which of the following is an operating limit of BOP equipment? Hole angle Maximum Anticipated Surface Pressure (MASP) Test pressure limit of equipment Mud weight 14 / 20 What contributes to upward forces? Well pressure Burst pressure of the tubing Bottom hole temperature Tubing weight 15 / 20 Which of the following parameters are needed to calculate snub force? Pipe Weight OD of tubing body ID of tubing body Fluid weight 16 / 20 Why is it important to account for stripper drag? Has no effect on tubulars To calculate total snub force required To determine required pump pressure To determine your static balance point 17 / 20 Identify a purpose of fluids in workover/completion operations. Forms a wall cake Minimizes loss circulation Reduce productivity of well Pressure control 18 / 20 Where is a guide ram used? Spaced above the lowest stripping point Positioned above the bell nipple Positioned between safety rams All of the above 19 / 20 Calculate the gradient for the density of 1 ppg natural gas. 0.054 psi/ft 0.052 psi/ft 0.047 psi/ft 0.045 psi/ft 20 / 20 What is the objective of testing a barrier? Lowers maintenance costs Verifies barrier integrity Maintains barrier envelope seal integrity Increases life of the well Your score is LinkedIn Facebook Twitter VKontakte
