The phrase "sent downstairs" is correct and usable in written English.
You can use it when you want to describe someone being moved downwards, either literally (like down the stairs in a building) or figuratively (like being demoted in status). For example: "The naughty child was sent downstairs for misbehaving."
At the hospital, my nurse notices that my breathing is labored, and I'm sent downstairs for a chest X-ray.
Once suitably desiccated, they are sent downstairs to the vault, which is protected by reinforced concrete and considered bombproof and plane-crash-proof.
Anyway, I would be sent downstairs to where the children were.
So they sent me downstairs to wait for him".
He quietly sent me downstairs to fetch cucumbers, onions and sesame seeds.
"Then they sent me downstairs to keep an eye on Barry, with instructions to come right back upstairs and tell them if he diverged from the script.
"Eisenhower dictated a big-tent statement about party inclusiveness and sent Goldwater downstairs to read it to the reporters," said Mr. McMillan, recalling the event one recent afternoon in his sunny office filled with memorabilia at his Melville law firm.
But before he finished, and without telling her, he took a small sample of her tumor and sent it downstairs to Dr. George Gey (pronounced guy), head of tissue culture research at Hopkins.
And a jocular Rudolph W. Giuliani, evoking humility and even humanity, recalled: "When I was 2 years old, my father put a Yankee uniform on me and sent me downstairs to play with the kids, and the first thing they did was throw me in the mud".
They sent you downstairs to the box office.
Eleanor's is Chidi (William Jackson Harper), a Nigerian ethics professor who can't decide whether he should help Eleanor stay in The Good Place or send her downstairs.
