Cementing system and method for wellbores

Details Cementing system and method for wellbores Cementing system and method for wellbores

2006-04-25

2006-04-25

Bagnell, David (Department: 3672)

Wells

Processes

Cementing, plugging or consolidating

C166S383000, C166S155000, C166S317000, C166S318000

Reexamination Certificate

active

07032668

ABSTRACT:
The present invention provides a cementing system and method for wellbores by cementing an annulus between a wellbore casing and a wellbore. In at least one embodiment, the invention includes a landing collar defining a restricted passage, a wellbore casing defining a passage coupled to the landing collar, a top cementing plug for sealingly engaging the wellbore casing, a bottom cementing plug for sealingly engaging the wellbore casing, and a fluid injection assembly coupled to the wellbore casing for injecting fluidic materials into the wellbore casing and controllably releasing the top cementing plug and the bottom cementing plug into the wellbore casing. The bottom cementing plug includes a plug body defining a plug passage, a frangible membrane for sealing the plug passage, and a one-way valve for controlling the flow of fluidic materials through the plug passage. The invention also includes the bottom cementing plug and methods for operation.

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