  We perform a comprehensive study of the X-ray emission from 70 transient
sources which have been classified as a tidal disruption event (TDE) in the
literature. We explore the properties of these candidates using nearly three
decades of X-ray observations to quantify the properties and characteristics of
X-ray TDEs observationally. We find that the emission from X-ray TDEs increase
by two to four orders of magnitude compared to pre-flare constraints, which
evolves significantly with time and decays with powerlaw indices that are
typically shallower than the canonical $t^{-5/3}$ decay law, implying that
X-ray TDEs are viscously delayed. These events exhibit enhanced column
densities relative to Galactic and are quite soft in nature, with no strong
correlation between the amount of detected soft and hard emission. At peak,
jetted events have an X-ray to optical ratio $\gg$1, while non-jetted events
have a ratio $\sim$1, which suggests that these events undergo reprocessing at
different rates. X-ray TDEs have long $T_{90}$ values consistent with that
expected from a viscously-driven accretion disk formed by the disruption of a
main-sequence star by a black hole with a mass $<$$10^{7}M_{\odot}$. The
isotropic luminosities of X-ray TDEs is bimodal such that jetted and non-jetted
events are separated by a "reprocessing valley" which we suggest is naturally
populated by optical/UV TDEs that most likely produce X-rays, but due to
reprocessing this emission is "veiled" from observations. Our results suggest
that non-jetted X-ray TDEs likely originate from partial disruptions and/or
disruptions of low mass stars.
