Bi-directional Meter Proving

Question 1

What is the tolerance (percentage) of flow rate between the last Prove?

Answer 1

10%

Question 2

What is the allowable gravity change between last prove and current? (degrees API)

Answer 2

2 degrees API

Question 3

What is the maximum allowable temperature difference (deg. F) between the last and current Prove.

Answer 3

10 deg. F

Question 4

What is the maximum allowable pressure change (psig) between the last prove and the current?

Answer 4

20 psig

Question 5

What is the frequency of Proving compared to bbls flow rate per month?

Answer 5

0-5000 90-105, 5000-7499 60-75, 7500-999,999 30-42, over 1 million 15-30 days. Add 15 days to each for the range.

Question 6

Name the parts of a bi-directional meter prover.

Answer 6

Reciever trap, displacer (ball), switch, 4-way diverter valve, electronic pulse counter, pulse generator, meter, double block valve,

Question 7

How long do you perform a manual pulse count?

Answer 7

36 seconds

Question 8

What do you multiply a manual pulse count to get bbls/hr?

Answer 8

Multiply by 100

Question 9

What is the minimum consecutive repeatability between 5 out of 6 consecutive runs?

Answer 9

0.05%

Question 10

How many sets of runs must you perform and fail before contacting supervisor?

Answer 10

Two sets of runs

Question 11

What is the formula for checking repeatability percentage?

Answer 11

(maximum-minimum) / minimum * 100=repeatability %

Question 12

What is the nearest temperature average allowed when recording during proving?

Answer 12

0.1 deg. F

Question 13

What is the nearest pressure average allowed when recording during proving?

Answer 13

1 psi

Question 14

What two things should be checked after diverting flow through the prover?

Answer 14

Check for leaks at all critical valves, and assure no air or gas is in the prover.