Trying to get pip working on my Ubuntu pc. pip seems to be working for python2.7, but not for others.

Here's the problem:

$ pip
Traceback (most recent call last):
File "/usr/local/bin/pip", line 9, in <module>
load_entry_point('pip==1.4.1', 'console_scripts', 'pip')()
File "/usr/local/lib/python3.4/dist-packages/setuptools-1.1.5-py3.4.egg /pkg_resources.py", line 357, in load_entry_point
def get_entry_info(dist, group, name):
File "/usr/local/lib/python3.4/dist-packages/setuptools-1.1.5-py3.4.egg/pkg_resources.py", line 2394, in load_entry_point
break
File "/usr/local/lib/python3.4/dist-packages/setuptools-1.1.5-py3.4.egg/pkg_resources.py", line 2108, in load
name = some.module:some.attr [extra1,extra2]
ImportError: No module named 'pip'

$ which pip
/usr/local/bin/pip

$ python2.7 -m pip //here can be just python, btw
Usage:   
/usr/bin/python2.7 -m pip <command> [options]
//and so on...

$ python3.4 -m pip
/usr/bin/python3.4: No module named pip

From the home/user/.pip/pip.log :

Exception:
Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/pip/basecommand.py", line 122, in main
status = self.run(options, args)
File "/usr/lib/python2.7/dist-packages/pip/commands/install.py", line 283, in run
requirement_set.install(install_options, global_options, root=options.root_path)
File "/usr/lib/python2.7/dist-packages/pip/req.py", line 1431, in install
requirement.uninstall(auto_confirm=True)
File "/usr/lib/python2.7/dist-packages/pip/req.py", line 598, in uninstall
paths_to_remove.remove(auto_confirm)
File "/usr/lib/python2.7/dist-packages/pip/req.py", line 1836, in remove
renames(path, new_path)
File "/usr/lib/python2.7/dist-packages/pip/util.py", line 295, in renames
shutil.move(old, new)
File "/usr/lib/python2.7/shutil.py", line 303, in move
os.unlink(src)
OSError: [Errno 13] Permission denied: '/usr/bin/pip'

There's no /usr/bin/pip btw.

How can I fix this issue to work with pip and python 3.4 normally? I am trying to use pycharm, but it's package manager also stucks in this problem.

Thanks for attention!