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In directional survey we note down the inclination and azimuth at the survey point for a particular survey depth and using these data we calculate the North-South (N-S), East-West (E-W) coordinates and TVD using few mathematical calculations.

With the tangential method, the greater the build or drop rate, the greater the error.

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The black girl started licking her pussy and Jane went wild. I was stroking fast when the door opened and one of the 18 year old girls walked in with a towel around her.Her long blond hair was wet from the pool and so was most of her delicious young body. I turned around with my nine three quarter inch cock in my hand and her jaw dropped.Being a senior at University I live on Campus most of the year except during the Christmas, Summer and the other holidays when I try to make it home as much as possible.My new life started with a pool party and sleepover my sister wanted to have after her junior year in college.When using the average angle method, the inclination and azimuth at the lower and upper survey stations are mathematically averaged, and then the wellbore course is assumed to be tangential to the average inclination and azimuth.

Since the average angle method is both fairly accurate and easy to calculate, it is the method that can be used in the field if a programmable calculator or computer is not available.Als je liever direct contact wil met dames, zoals sexchatten en dergelijke dingen, raden we je gratis sexdating aan van Ook kan het wel eens gebeuren dat je niet de juiste vrouw kan vinden. Here, its worth mentioning that when the value of inclination (I) and azimuth (A) are same at both survey stations, then the denominator for some of the above equation becomes zero and hence the equation is not defined.This is the ERROR we found using "Radius of Curvature Method".The error will be small and well within the accuracy needed in the field provided the distance between surveys is not too great.