Four fields of similar to 5 degrees x 4 degrees have been surveyed using th
e HI-21 cm line (HPBW = 0.degrees 5) in searching for HI interstellar bubbl
es in the environs of several Of stars. The analysis of the data disclosed
four bubble candidates, three with almost complete envelopes. Their dimensi
ons are similar to 40 pc and their expansion velocities around 10 km s(-1).
For each structure swept-up masses (1000 to 8800 M.), original ambient gas
densities (less than or similar to 0.6 cm(-3)), dynamical ages (similar to
2 Myr) and kinetic energies (less than or similar to 2 x 10(49) erg) were
derived. The origin of the HI shells is discussed, taking into account thei
r kinematics, energy, age and the emission at other wavelengths. As in the
case of several WR HI shells, the O strong stellar winds would be the main
agents blowing the HI bubbles.