Given: Suspend exactly 1,000 ft. of 0.250 in. diameter, perfectly straight, stranded cable down a wellbore. At the top, pinch the cable between the faces of two flat faced wheels, each 7.6394 in. diameter. With no slippage of the cable with respect to the wheels, count exactly 500 revolutions of each wheel while pulling the 1,000 ft. of cable vertically, from the wellbore.

Question 1: Same scenario as given, except, instead of pulling the 1,000 ft. vertically from the wellbore, have the cable contact one wheel over a 90 degree arc of it's circumference and be pulled at a right angle to the centerline of the wellbore. Now, what measuring wheel diameter would be required for it to rotate exactly 500 times for the same 1,000 ft. of 0.250 in. cable pulled?

Question 2: Any super duper formulas for calculating measuring wheel diameters with regards to cable diameters and the arc degrees of measuring wheel contact? Our designs call for contact angles of from 80 to 90 degrees.

G

Question 1: Same scenario as given, except, instead of pulling the 1,000 ft. vertically from the wellbore, have the cable contact one wheel over a 90 degree arc of it's circumference and be pulled at a right angle to the centerline of the wellbore. Now, what measuring wheel diameter would be required for it to rotate exactly 500 times for the same 1,000 ft. of 0.250 in. cable pulled?

Question 2: Any super duper formulas for calculating measuring wheel diameters with regards to cable diameters and the arc degrees of measuring wheel contact? Our designs call for contact angles of from 80 to 90 degrees.

G

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