7/28/2019 DD Calaculations

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DIRECTIONAL DRILLING FORMULAE

Extrapolate to Bit Inclination at Bit

X = Angle at Bit X = Build Rate x Distance to bit

X = (Meters set) (DL per m) (Cos TF set) +Present Inc 10/100/30 + Last Inc

Degrees of Turn TVD at Bit

X = (Meters Set) (DL per m) (Sin TF set) X = Sin fo Bit Inc-previous inc x 1719Sin of present Inc Build Rate x present TVD

Change in TVD Build Rate Required = X

Change in TVD = (Cos average INC) CL X = Sin Target Inc Sin Bit Inc x 1719

TVD remaining to Target

Angle required for a given TVD change over a given CL X = Build Rate

Angle needed = Acos + Change inTVD X = Present inc Previous incCL Length Slid x 10/100/30m

Open Hole Sidetrack to achieve separation, slide x meters Motor is giving X degrees / 30 m

X = Hole Size x 2 X = Dogleg Seen (CL)

Sin (Motor DL/m) Meters Set

Turn Rate required to hit Target Given TVD will result in What MD ?

Azm @ Tgt Azm @ Bit (Projection) X 10 / 30 TVD @ Tgt Present IncMD @ Tgt MD @ Bit (Present Inc + Angle @Bit divide by 2) Cos

What will be the resulting VS if BR changes Closure Azimuth

Tgt Inc Present Inc X 30 = CL Departure x Arc tan

BR/30 Latitude

CL + Present MD = VS +/- Quadrant of your Section Direction

Distance from Proposal

(Proposal Lat Actual Lat)2 + (Proposal Dep Actual Dep)2 + (Proposal TVD-Actual TVD)2

This is for 3D..for 2D ignore the TVD part of the equation

- 360

+ 180 - 180

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