Specifications

1.API Stage cementer plug system
2.one joint above the float collar
3.Pressure is applied to the casing

API Stage cementer plug system

 

1.The accessories of DSG/SJG stage cementer include a first-stage plug,free-fall opening
plug,closing plug,shut-0ff baffle and pumping-down opening plug.Being made of
rubber or aluminum,these parts are dritlable.

2.The shut-off baffle is installed in the casing collar,usually one joint above the float
collar.

3.The first-stage plug is used to isolate the first-stage cement and drilling fluid.On the
end of displacement,the first-stage plug lands and effects a seal against the shut-off
baffle.

4.Featuring stream-line shape and filled with lead,the free-fall opening plug can
quickly free-fall to the lower sliding sleeve.When pressure is applied to the casing,it
call open the circulation ports.

5.The closing plug is used to isolate second-stage cement and drilling fluid.When
running to the upper sliding sleeve,it effects a seal in the stage cementer.Pressure is
applied to the casing and the circulation ports are closed.

6.The pumping-down opening plug is used for continuous cementing operation and in
deviated wells.It can open the circulation ports directly and quickly,whereas the
freefall opening plug needs longer time waiting for failing.