Hybrid-tieback seal assembly

摘要

A hybrid-tieback seal assembly and methods for tying a well back to the surface or subsea well head are disclosed. A method to tie a well back to the surface or subsea well head comprises running a hybrid-tieback seal assembly into a wellbore, the hybrid-tieback seal assembly comprising one or more anchoring bodies, one or more packer seal assemblies; and a device for creating a pressure differential in a tieback string, wherein the tieback string is coupled to the hybrid-tieback seal assembly. The method further comprises landing a casing hanger in a well head, increasing pressure in the tieback string, setting the anchoring bodies and one or more packer seal assemblies within at least one of a previously installed liner hanger system and a host casing above a previously installed hanger system, and testing the hybrid-tieback seal assembly down an annulus between the host casing and the tieback string.

主权项

1. A hybrid-tieback seal assembly system comprising:
a hybrid tieback seal assembly attached to a casing string, comprising
a tieback string;one or more anchoring bodies coupled to the tieback string;one or more packer seal assemblies coupled to the tieback string proximate the one or more anchoring bodies; anda device for creating a pressure differential in the tieback string; and an applied pressure differential used for setting the one or more anchoring bodies and the one or more packer seal assemblies, said applied pressure differential being the sole means for setting said one or more anchoring bodies and one or more packer seal assemblies.