Method and apparatus for stage cementing a liner in a well bore

Details Method and apparatus for stage cementing a liner in a well bore Method and apparatus for stage cementing a liner in a well bore

1988-08-01

1989-08-08

Neuder, William P.

Wells

Processes

Cementing, plugging or consolidating

166291, 166123, 166156, 166181, E21B 3314

Patent

active

048543861

ABSTRACT:
The present invention relates to a method and apparatus for cementing a liner in a well bore having a casing wherein the liner is connected to a running tool and includes hanger means for securing the liner to the casing in the well bore. The liner includes an upper and lower liner portion each having port means therein and means to lock the telescoping liner portions against relative longitudinal movement to prevent premature actuation or operation of the port means.
The liner portions provide a mechanically actuated port arrangement to be employed with first and second liner wiper means and first and second pump down plug means for cementing above a packer on the lower liner portion, or for providing dual stage cementing.

REFERENCES:
patent: 4060131 (1977-11-01), Kennedy et al.
patent: 4450912 (1984-05-01), Callihan et al.

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