초록 ▼

A multiple cone, multiple bearing liner hanger for hanging a well liner for extension of the casing liner. The multiple slip cone and multiple bearing arrangement provides uniform, positive distribution of liner weight thereby facilitating hanging of heavier liner strings. The multiple bearings ensu

A multiple cone, multiple bearing liner hanger for hanging a well liner for extension of the casing liner. The multiple slip cone and multiple bearing arrangement provides uniform, positive distribution of liner weight thereby facilitating hanging of heavier liner strings. The multiple bearings ensure proper rotation of the liner during cementation. The multiple cone, multiple bearing liner hanger includes an upper slip assembly with an associated bearing and a lower slip assembly with an associated bearing. The hanger is hydraulically set by first setting the upper slips and thereafter setting the lower slips. A series of shear pins ensure proper setting of the hanger to distribute the hang weight evenly over the slip cones and bearings.

대표청구항 ▼

A rotatable liner hanger and casing liner assembly for securing the casing liner within a well bore comprising: an upper slip assembly mounted to the casing liner, said upper slip assembly including a plurality of slip elements and a slip cone; an upper bearing assembly mounted to the casing liner a

A rotatable liner hanger and casing liner assembly for securing the casing liner within a well bore comprising: an upper slip assembly mounted to the casing liner, said upper slip assembly including a plurality of slip elements and a slip cone; an upper bearing assembly mounted to the casing liner adjacent said upper slip assembly for rotation of the casing liner relative to said upper slip assembly; a lower slip assembly mounted to the casing liner, said lower slip assembly including a plurality of slip elements and a slip cone; a lower bearing assembly axially slidably mounted to the casing liner adjacent said lower slip assembly for rotation of said lower slip assembly relative to said upper slip assembly and rotation of the casing liner relative to said lower slip assembly; and fluid pressure responsive means mounted to the casing liner for effecting longitudinal movement of said lower slip assembly, said lower bearing assembly and said slip elements of said upper slip assembly to set said upper slip assembly and said slip elements of said lower slip assembly to secure the casing liner within the well bore.