Liner hanger systems are a type of well completion technology used in oil and gas wells. They are designed to suspend a liner or casing string in the wellbore, allowing the well to be completed without the need for cementing. The liner hanger system consists of a liner hanger, a packer, and a running tool. The liner hanger is a device that is attached to the top of the liner or casing string and is used to suspend the liner in the wellbore. The packer is a device that seals off the annulus between the liner and the wellbore, and the running tool is used to install the liner hanger and packer in the wellbore.