| 摘要 |
An emergency casing hanger and packoff allows casing to be set when it has been stuck. The hanger has a slip body that slides over the casing after the casing is cut. The slip body lands in a wellhead housing. The slip body has a bowl which carries slips for gripping the casing. A split ring carried by the body engages a recess in the wellhead housing to lock the hanger in place. A wedge moves the split ring outward when rotated by a running tool. An energizing ring carried by the slip body moves the slips downward to energize them. The packoff has a metal seal ring with an annular cavity, defining inner and outer faces. The inner face contains a plurality of deformable bands. A wedge member urges the faces apart, causing the bands to deform and seal against the casing.
|
