Are there long pipes that either increase speed of water or at least do not decrease it?
Water speed has nothing to do with it.  All pipes have a very, very large surface to interact with the water therein (hydrodynamic term: "wetted area"), and will quickly brake any water velocity.  

No, water moves because of pressure.  For passive movement, that means height/gravity.  The trade language for height is "head".  The pressure is 1 atmosphere per 10m of height (about 1 psi per 2 feet).   Water does not flow uphill.  If you have a hill to climb, you either need forced pumping..... or for very small climbs, highly competent use of syphons. 

Obviously you cannot syphon more than 10m of head, since the pipe would be 100% vacuum inside.  You do need a pump capable of removing air at the top of the syphon. (The mouth will do for less than 800mm, fit a check valve so you don't get spit in the pipe). 

Mesopotamia and the Indus Valley had the finest water engineering in the history of the world, until the British gained the crown. And they weren't the only ones. So mastery of hydraulics might be your birthright!