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HDD Analyser - Steel Pipe
Frac-out Analyser (HDD)
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User Manual - HDD Analyser
Horizontal Directional Drilling
Design Calculation
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HDD - Input Parameters
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SI units
Customary units
Pipe parameter
Pipe steel outside diameter
D
s
Pipe steel wall thickness
t
s
Pipe internal corrosion allowance
CA
Select Material Grade
Others
API 5L Gr. B
API 5L Gr. X-42
API 5L Gr. X-46
API 5L Gr. X-52
API 5L Gr. X-56
API 5L Gr. X-60
API 5L Gr. X-65
API 5L Gr. X-70
API 5L Gr. X-80
DNV-OS-F101 245
DNV-OS-F101 290
DNV-OS-F101 320
DNV-OS-F101 360
DNV-OS-F101 390
DNV-OS-F101 415
DNV-OS-F101 450
DNV-OS-F101 485
DNV-OS-F101 555
Specified minimum yield strength of steel
SMYS
Pipeline steel density
ρ
s
Young's Modulus of Elasticity of steel
E
s
Poisson's ratio
ν
--
External coating thickness [1st coat]
t
coat1
External coating density [1st coat]
ρ
coat1
External coating thickness [2nd coat]
t
coat2
External coating density [2nd coat]
ρ
coat2
Design parameters
Design pressure of pipeline
P
d
Minimum hydrostatic test pressure of pipeline
P
h
Design temperature of pipeline (buried)
T
d
o
Ambient temperature of pipeline (installation)
T
amb
o
Avg. co-efficient of friction between pipe & soil
μ
soil
-
Avg. co-efficient of friction on roller support
μ
roller
-
Distance between roller supports
L
roller
Radius of overbend (pipe on conveyors)
R
o
Drag co-efficient between pipe & bentonite mud
μ
mud
Density of bentonite in the hole
ρ
bent
Maximum Allowable Stress Percentages
Maximum allowable longitudinal stress
F
L
% SMYS
Combined equivalent stress [hydrotesting]
F
H
% SMYS
Combined equivalent stress [operation]
F
O
% SMYS
Safety factor for computed elastic bend radius
F
EBR
times
Drilling profile
Fig. Typical Horizontal Directional Drilling Crossing
Horizontal length of crossing
L
h
Depth of crossing w.r.t RL
Depth
Angle of entry
θ
in
deg
Angle of exit
θ
out
deg
Radius of curvature (pipe side)
R
in
Radius of curvature (rig side)
R
out
Entry height w.r.t. RL
h
in
Exit height w.r.t. RL
h
out
Parameters for maximum permissible overburden on pipe
Height of soil column above pipe
H
soil
Height of water column above pipe
H
water
Density of soil column above pipe
ρ
soil
Density of water column above pipe
ρ
water
Buoyancy control parameters
Apply buoyancy control to reduce pulling load
True
Water-filled Pipe Method
Pipe-in-Pipe Method
Pipe-in-pipe details
Pipe-in-pipe diameter
D
Pipe-in-pipe wall thickness
t
Pipe-in-pipe material density
ρ
Density of fluid/water to be filled
ρ
fluid
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