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product
K331-thermal packer 
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K331-XXX thermal packer
一、use to
K331thermal packer is used for heavy oil thermal recovery wells ,block up the oil tube annulus ,it can effectively reduce steam heat loss along the well bore and improve thermal recovery effect.
二、structure and principle
⒈ structure
it is made of body ,thermosensitive metal , sleeve ,protection ring ,seal ring and expansion pipe.
2.feature
a） thermal and compensator get together , easily to operate.
b） itself can setting and releasing.
c） if the temperature is the sleeve too high ,lift up can releasing.
3. working princinple
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.
releasing: stop injecting steam ,thermosensitive metal sheet shrinks inward with drop of themperature ,rubber barrel loses its support,packer is unset automatically ,raise tubular . then the packer taken out .
三、 requirement
⒈ when operate ,the lifting down speed should be less than 10/min.
⒉ the sleeve should be clean enough , the setting position should avoid tubing coupling.
四、step （以K331-152为例)
1 lift the oil tubular .
⒉ Sand exploration, sand is to cleaned to the end of the well.
⒊ Under the drift to the packer seat position below 5m,wash for 1 week.
⒋ Scraper tube scraping the tube, in the seat position repeatedly scraping to the next smooth, is washing well for a week, and then lift the scraper.
⒌ According to the design requirements of thermal packer Ф73 × 1 under the tubing with a coupling, coupling from the sand seal above the 10-15 m position, installed wellhead steam.
⒍ releasing, the well water reverse circulation wash well to reduce the temperature of the wellbore, the mention of the column, the packer.
Main technical parameters
size | K331-115 | K331-142 | K331-152 | K331-205 |
mm length | 4710 | 4700 | 558 | 4760 |
mm Max OD | 116 | 142 | 152 | 205 |
mm Min ID | 50 | 62 | 62 | 76 |
℃temperature | 350 | 350 | 350 | 350 |
MPa pressure | 17 | 17 | 17 | 17 |
℃ setting temperature | 250 | 250 | 250 | 250 |
connection | 上up：2 7/8 TBG 下down：2 7/8 TBG | 上：2 7/8 TBG 下：2 7/8 TBG | 上：4 1/2 BCSG 下：2 7/8 TBG | 上：4 1/2 BCSG 下：2 7/8 TBG |
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