Apparatus for cementing well liners
Patent
·
OSTI ID:6079951
This liner cementing apparatus includes a packer which is releasably connected to the liner string. The packer may initially be expanded while the cement is taking its initial set to relieve the cement from the hydrostatic loads of the overlying fluids. It may then be retracted, if it is necessary to squeeze the cement by pressurizing through the well annulus from above the packer. The apparatus also includes a releasable connection enabling the packer to be withdrawn from the well when cementing operations have been completed. The packer assembly includes a valve mechanism operable upon expansion or setting of the packer to open circulation passage between the well annulus and the operating string above the packer. This permits washing out of any excess cement above the packer. (11 claims)
- Assignee:
- TUL; EDB-81-108812
- Patent Number(s):
- US 3364996
- OSTI ID:
- 6079951
- Country of Publication:
- United States
- Language:
- English
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