A 4 ½ inch tubing is to be set at 10,000 ft to produce from a gas formation at 10,500 ft. Formation pressure gradient is 0.45 psi/ftGas gradient is 0.095 psi/ft. Fluid in annulus has 13 ppg.
Select the minimum safe grade and weight of the tubing basedupon the following considerations:
i.- Casing head pressure is 300 psi.
ii.- Assume well to be shut-in when calculating burst pressure.
iii.- Assume tubing to be empty when calculating collapsepressure
iv.- Safety factors are 1.125 for burst and collapse and1.3 fortension
v.- Tension needed to set packer is 15,000 lb
Select the minimum safe grade and weight of the tubing basedupon the following considerations:
i.- Casing head pressure is 300 psi.
ii.- Assume well to be shut-in when calculating burst pressure.
iii.- Assume tubing to be empty when calculating collapsepressure
iv.- Safety factors are 1.125 for burst and collapse and1.3 fortension
v.- Tension needed to set packer is 15,000 lb
