Frac-out (hydrofracture) Analysis

User Manual - Frac Out Analyser

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Bore diameter

d_bore

Bore diameter shall be between 0 - 2000

Diameter of drill rod

d_pipe

Value shall not be less than '0' and more than '1000.0'

Length of drill rod

L_Rod

Value shall not be less than '0' and more than '1000.0'

Unit weight of drilling fluid (mud)

γ_mud

Value shall not be less than '0'

Viscosity of drilling fluid (mud)

μ_mud

Value shall not be less than '0'

Yield point of drilling fluid

τ_y

Value shall not be less than '0' and more than '10000'

Flow rate at the drill bit

Value shall not be less than '0' and more than '10000'

Density of groundwater (fresh)

γ_water

Value shall not be less than '0'

Factor of safety

F_S --

Value shall not be less than '1.0' and more than '10.0'

Soil (geotech) survey data points

Single

Multiple

Friction angle of soil

φ_s deg

Value shall not be less than '0' or more than '90'

Shear modulus of soil

Value shall not be less than '0'

Coeffient of cohesion of soil

Value shall not be less than '0'

Unit weight of soil (dry) above groundwater

γ_soil

Value shall not be less than '0'

Number of geotech data points

N_s

Distance from pilot entry []	Friction angle, φ_s [deg]	Shear modulus, G []	Coeffient of cohesion, c []	Unit weight of soil (dry), γ_soil []

Fig. Typical Horizontal Directional Drilling Crossing

Horizontal length of crossing

L_h

Depth of crossing w.r.t RL

Depth

Angle of entry of pilot (rig side)

θ_in deg

Angle of exit of pilot (pipe side)

θ_out deg

Radius of curvature (rig side)

R_in

Radius of curvature (pipe side)

R_out

Entry height w.r.t. RL (rig side)

h_in

Exit height w.r.t. RL (pipe side)

h_out

Number of ground elevation points

N_G

Add the distance vs ground elevation or water level in the table below based on the site survey for locations where the difference in ground elevation is at least more than 1m.

Positive value → Elevation above the reference level (RL)
Negative value → Elevation below the reference level (RL)

Note: Please do not enter any value in water elevation column in case you want to avoid the effect of groundwater pressure.

Horizontal distance from pilot entry (Rig side) []	Ground elevation w.r.t Reference Level (RL) []	Groundwater elevation w.r.t Reference Level (RL) []

Send me this input for record

Frac Out Analyser Horizontal Directional Drilling

Input parameter

Site specific data

Drilling profile

Fig. Typical Horizontal Directional Drilling Crossing

Ground profile