The woman said to him, "Sir, give me this water, so that I don't get thirsty, neither come all the way here to draw."

 The well itself was more than 100 feet deep. It is not a springing well of water; it is a wet into which the water percolates and gathers. But clearly it was a well so deep that no one could gain water from it unless he had something with which to draw the water. 