Stage cementing apparatus

Details Stage cementing apparatus Stage cementing apparatus

E - Fixed Constructions

21

B

166/17

E21B 33/14 (2006.01) E21B 34/14 (2006.01)

Patent

CA 1244342

STAGE CEMENTING APPARATUS ABSTRACT OF THE DISCLOSURE A stage collar for stage cementing a well casing includes a slidable closing sleeve having ports alignable with ports in the stage collar case. These closing sleeve and stage collar ports communicate with an annulus around the well casing when the stage collar is open. A shift sleeve closes the ports during running in and is actuable by simple drill pipe movements to open and re- close the stage collar ports. The shift sleeve is oper- ably coupled to the closing sleeve by a latch ring which locks the closing sleeve closed and cooperates therewith to form a smooth and substantially uniform inner stage collar bore. The drill pipe is operably connected to the stage collar by a screw-in or latch-in shifting tool which cooperates with the stage collar elements to form a fluidtight passage from the drill pipe to the annulus without entering the well casing interior. A dual stage shifting tool is also shown which permits a two-stage cementing operation to be performed with only one run down the hole.

499219

Affiliated with

Also associated with

Rating

Stage cementing apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Stage cementing apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stage cementing apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1322596