Vector Calculation

[RSutton]

Hi,

I have an inclined borehole. I know the angle of inclination (deg from horizontal) and the length they drilled. I am trying to calculate out the relative depth that the drill has gone down vertically.

Any help will be appreciated.

Thanks

Richard

 

[Guest262653]

L.sin(angle)?

 

[msquared48]

Nope. L Cos(angle) where the angle is the inclination from the vertical, and "L" is the length of the actual bore.

Mike McCann, PE, SE (WA)

 

[IRstuff]

Really? How annoying; pretty much standard English and other disciplines define inclination as the deviation from horizontal.

TTFN
faq731-376

Need help writing a question or understanding a reply? forum1529

Of course I can. I can do anything. I can do absolutely anything. I'm an expert!

 

[Guest262653]

OP defined inclination as angle from horizontal. Hence, L.sin(angle).

 

[IRstuff]

But, did he define it based on the assumption that "inclination" is an angle from vertical, and did he, or someone else, convert the typical angle, measured from vertical into its complementary angle?

TTFN
faq731-376

Need help writing a question or understanding a reply? forum1529

Of course I can. I can do anything. I can do absolutely anything. I'm an expert!

 

[BigH]

Geotechs typically march to a different drummer. Since it is a vertical drill hole or nearly so we would deviate from the vertical. It is also why depths are considered positive numbers, not negative.

 

[slabongrade]

+1 avscorreia