Apparatus and method for cementing well liners

Details Apparatus and method for cementing well liners Apparatus and method for cementing well liners

1974-10-15

1976-01-27

Abbott, Frank L.

Wells

Processes

Cementing, plugging or consolidating

166182, 166208, 166315, E21B 3314, E21B 4310, E21B 2300

Patent

active

039346528

ABSTRACT:
Apparatus and method for cementing a liner in a well bore in which the apparatus may comprise: a setting tool having a tubular mandrel connected in a pipe string for extension through the liner; a liner wiper releasably disposed within the liner near one end of the mandrel; a plug member for effecting a movable seal behind cement as it is pumped through the pipe string into the liner; a seal assembly sealingly engaging the exterior of the mandrel and the interior of the liner above the liner wiper; and a latch assembly releasably connecting the seal assembly to the liner so as to permit limited axial movement of the mandrel without disturbing the axial position of the seal assembly. In the method of cementing a liner using the apparatus, the force due to pressure applied to the seal assembly, during pumping of cement, is transferred to the liner without transfer to the mandrel.

REFERENCES:
patent: 2894586 (1959-07-01), Schramm et al.
patent: 3109490 (1963-11-01), Baker
patent: 3342268 (1967-09-01), Brown
patent: 3364996 (1968-01-01), Brown
patent: 3635288 (1972-01-01), Lebourg

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