So it's one staticmethod calling another static method. Then we might as well not bother and just use regular python functions. The point of using classes is so you can do things like subclassing and overwriting specific functionality. 

It's not a showstopper but take a step back and see if you can re-architect the whole class to better use OO. Think big. If there's no way you can make it instance methods (because you'll never use the `self`) then reconsider to perhaps pack all these little functions into a lib like elastic_search_lib.py or something. Granted, you still can't use subclassing to override things but at least it becomes self-sufficient as a lib which makes it easy to polish and have tests just for that.