Multiple stage cementing of well casing in subsea wells

Details Multiple stage cementing of well casing in subsea wells Multiple stage cementing of well casing in subsea wells

E - Fixed Constructions

21

B

166/17

E21B 7/12 (2006.01) E21B 33/05 (2006.01) E21B 33/076 (2006.01) E21B 33/16 (2006.01)

Patent

CA 1060781

Abstract of the Disclosure A method and apparatus for multiple stage cementing of well casing in subsea wells. Also a subsea stage cementer, plug stack assembly. The combination with a subsea stage cementer plug stack assembly of a packing and shipping crate therefor. A trip-plug for operating a stage cementing collar to open the ports thereof. A dart adapted to enter the bore of a hollow plug to block the flow of liquid through the bore.

276937

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