| 摘要 |
A cup type formation packer shoe is provided to be used in well cementing operations for cementing either casing or tubing in existing casing in a well bore. This packer shoe includes packer cups which are forced into sealing engagement with the existing casing by the cement being displaced into the annulus between the existing casing and the new casing. Further, the packer cups support the column of cement in the annulus preventing flow downwardly past the packer shoe.
|
