Tubing Stress Analysis

Purpose of tubing stress analysis: 1 define weight, grade, metallurgy & size of the completion 2 ensure tubing can withstand with all projected installation and service loads f 3 Help to define what packers/anchors and expansion devices are required. The 4 assist in definition of surface equipment such as wellheads, trees and flowlon

on and service loads for the life of the well vices are required. The loads on any packers and the length of the seal bores in expansion devices will need d ads, trees and flowlones by assessing load cases such as shut-in pressure and flowing temperatures

on devices will need defining. Load transfered through packers/anchors to the casing will need to be assesse emperatures

ill need to be assessed.

INPUT DATA Grade = ID = OD = Yield = SoM = Connection = ID = OD = Burst = Collapse = Weight = Depth (TVD) = Depth (MD) = Well Inclination = Wellbore fluid (Ext)= Wellbore fluid (Int) =

Axial strength Ax Fx Axial load Fw Or Fw

L80 4.892 inch 5.5 inch 80,000 psi

inch inch psi psi 17 ppf 10,000 ft 10,000 ft 10 deg 8.33 ppg 8.33 ppg

= =

4.962579 inch^2 397006.3 lb

=

167417.1 lb

=

170000 lb

Buoyancy Pi Pe Ai Ae Fb

= = = = =

4331.6 psi 4331.6 psi 18.79653 inch^2 23.75911 inch^2 -21495.91 lb

Pressure Test test pressure plug depth Tubing Internal Area Fp

= = = =

5000 psi 5000 ft 18.79653 inch^2 134692.2 psi

Piston forces (Due to crossover)

Tubing properties: OD ID Conn OD Conn ID Weight

Calculation

Depth

Hole size Angle

Weight

Bending Drag forces forces

Buoyancy forces

Total effective tension

critical buckling forces Sinusoidal Helical

maximum helix angle Sinusoidal Helical