用“retrievable packer”造句大全,retrievable packer造句
1、single string retrievable packer
4、It is attached to the bottom end of a retrievable packer, and opens and closes automatically with the change of the pressure of the hot fluid column in the tubing-casing annulus.
2、cup type retrievable packer
3、In the design of the hydraulic dual-anchor retrievable packer, the following should be taken into consideration: (1)selection of anchoring mode;