Abstract: A liner hanger system enables installation of a liner hanger by means of a full bore casing to surface and provides pressure integrity between the casing's inner and outer sides. The liner hanger system comprises a liner hanger, along with an associated liner, coupled to a tieback casing string. The liner hanger and liner are deployed downhole connected to a tieback casing string. Once the liner has been lowered to the position of interest, first the liner hanger is anchored and cemented in position, and then, a packer is set to seal the lower annulus of the liner. The liner hanger system enables operations that used to require a plurality of trips, to be performed in a single trip. It does so without introducing any unwanted limitation to the inner diameter at any point between the wellhead and the end of the liner, and while also allowing for potential decoupling and removal of the tieback casing string from the liner hanger if desired.

Abstract: A liner hanger system enables installation of a liner hanger by means of a full bore casing to surface and provides pressure integrity between the casing's inner and outer sides. The liner hanger system comprises a liner hanger, along with an associated liner, coupled to a tieback casing string. The liner hanger and liner are deployed downhole connected to a tieback casing string. Once the liner has been lowered to the position of interest, first the liner hanger is anchored and cemented in position, and then, a packer is set to seal the lower annulus of the liner. The liner hanger system enables operations that used to require a plurality of trips, to be performed in a single trip. It does so without introducing any unwanted limitation to the inner diameter at any point between the wellhead and the end of the liner, and while also allowing for potential decoupling and removal of the tieback casing string from the liner hanger if desired.

Abstract: A tool for economically, efficiently, and reliably separating a workstring in a wellbore is disclosed.

Abstract: An underreamer is provided in which the cutting elements are retracted into the tool body during run in, extensible for the performance of cutting operations, and retractable into the body of the tool afterwards.