Механический Термоупаковщик нефтяных скважин для

 K331 type  self  compensating   thermosensitive  packer  is  used for  thickened  oil  thermal  production  well, packer  oil  casing  annular  space, and  be  used  with  insulated  tubing  together, which  can  effectively  reduce  heat  losses  of  steam  along  the  shaft  and  improve  thickened  heat  exploration   effect.

Working  principle :

Setting:  inject  steam  when  packer  is  lowered  to design  position  ,  thermosensitive  metal  sheet  expands  outward  with  rise  of  temperature  and push  sealing  rubber  barrel  to expand  outward , oil  casing  annular  space is sealed.

Unsetting: stop  injecting  steam, thermosensitive  metal  sheet  shrinks  inward  with  drop  of  temperature  , rubber  barrel  loses  its  support, packer is  unset  automatically  , raise  tubular  column , then packer can be taken out.