well-running russian

• зала́дившийся

  well-established, well-running, having gotten on track, successful (in progress)

• зала́женный

  well-established, well-run, smooth-running, well-oiled

• нака́танный

  well-worn, well-trodden, compacted, rolled (of a path or road)

  well-practiced, routine, established, smoothly running

Examples

• Э́то плохо рабо́тает потому, что батаре́йки сели.

  It doesn't work so well because the batteries are running down.