[Eric in the Ozarks]

A retired USAF Lt. Colonel told me it took three 135s to fill up a B-52 for a prolonged patrol.

[Ruy Dias de Bivar]

I remember flying out of Okinawa refueling B-52s. Looking out the left window, you could see two B-52s being refueled in the distance. Same out the right window. Then there was the one WE were refueling.
Our aircraft was a KC-135Q. We called it the “queer” model as it had special tanks to refuel the SR-71 and could still do Bombers and fighters.

[HereInTheHeartland]

“A retired USAF Lt. Colonel told me it took three 135s to fill up a B-52 for a prolonged patrol. “

I had to look it up (you are correct)!

http://www.af.mil/AboutUs/FactSheets/Display/tabid/224/Article/104465/b-52-stratofortress.aspx

http://www.af.mil/AboutUs/FactSheets/Display/tabid/224/Article/104524/kc-135-stratotanker.aspx