US 2012/0222861 A1 · Mechanical Liner Drilling Cementing System

Abstract

A packer setting tool sets a liner top packer by mechanical rotation of the running tool and set down weight following cementing of a liner. The packer setting tool includes a tubular release body mounted on an end of the running tool. An annular dog sub circumscribes a portion of the release body. The dog sub is linked to the release body with a shear screw. A thread on an outer surface of the release body engages a thread on an inner surface of the dog sub to define a threaded connection between the dog sub and the release body. When the running tool rotates, the thread on the release body rotates with respect to the thread on the dog sub driving the release body in an axial direction fracturing the shear screw and urges an adapter sleeve against the packer assembly to set the packer assembly.

Claims22

Dependent claims

A packer setting tool for use with a running tool, the packer setting tool comprising:

a tubular release body mounted on an end of the running tool and insertable into a wellbore;
an annular dog sub supported within the wellbore that circumscribes a portion of the release body and linked to the release body with a shear screw;
a thread on an outer surface of the release body engaged with a thread on an inner surface of the dog sub to define a threaded connection;
and
a tubular adapter sleeve mounted on an outer surface of the release body and having an end configured to interfere with a packer assembly, so that when the running tool rotates, the thread on the release body rotates with respect to the thread on the dog sub to drive the release body in an axial direction that fractures the shear screw and urges the adapter sleeve against the packer assembly to set the packer assembly.

2 more elements

A system for cementing a liner string suspended from an end of a wellbore casing string by a liner hanger, and setting a liner top packer in the casing string above the liner hanger, the system comprising:

a running tool defining a central bore for passage of cement and drilling mud, the central bore having an axis;
a packer setting tool coupled to the running tool so that rotation of the running tool will actuate the packer setting tool to set the liner top packer with the running tool and upwards axial pull will actuate the packer setting tool to release the packer setting tool from the liner top packer;
the liner top packer releasably mounted to the packer setting tool at an upper end of the liner top packer;
a double flapper valve coupled to a lower end of the liner top packer so that after removal of the packer setting tool from the well bore the double flapper will prevent fluid flow in two directions through the valve;
and
a tie back nipple coupled to a lower end of the double flapper valve and configured to engage a liner top.

3 more elements

A method for cementing a liner string suspended from an end of a wellbore casing string by a liner hanger, and setting a liner top packer in the casing string above the liner hanger, the method comprising:

(a) running a running tool assembly having a running tool, a packer setting tool, a liner top packer in an unset position, a double flapper valve in an open position, and a tie back seal nipple into engagement with a liner top;
(b) pumping cement through the running tool assembly into a liner annulus between the liner and a native formation;
(c) pumping a displacement plug down the running tool assembly;
(d) setting the liner top packer by rotating the running tool assembly relative to the packer setting tool while maintaining a downward force on the liner top packer;
(e) removing the running tool and the packer setting tool;
then
(f) moving the double flapper valve to a closed position.

4 more elements

Dependencies are inferred from the claim text.

Mechanical Liner Drilling Cementing System

Life of this patent

Mechanical Liner Drilling Cementing System

Life of this patent

Abstract

Claims22