Wells – Processes – With indicating – testing – measuring or locating
Reexamination Certificate
2007-06-05
2007-06-05
Dang, Hoang (Department: 3672)
Wells
Processes
With indicating, testing, measuring or locating
C166S055600, C166S066000, C166S298000, C166S196000, C166S387000
Reexamination Certificate
active
11106019
ABSTRACT:
A liner hanger test packer assembly includes an axially translated liner top dressing mill having a calibrated shear mechanism for securing the mill at a first, top dressing position. Tool string load on the mill bearing upon the liner top in excess of the calibrated shear mechanism allows the mill to shift to a second axial position where abutment edges around the Mill base engage a tripping mechanism to drive slips against the casing wall above the liner hanger. The tripping mechanism also expands the packer seal against the casing I.D. above the liner hanger. No additional load may be imposed on the liner hanger after the anchor slips have engaged.
REFERENCES:
patent: 3142338 (1964-07-01), Brown
patent: 4662453 (1987-05-01), Brisco
patent: 4942925 (1990-07-01), Themig
patent: WO 01/83938 (2001-11-01), None
Dolyniuk David Alan
Mackenzie Gordon Robert James
Plante Mark Edward
White Richard Travis
Dang Hoang
Madan Mossman & Sriram P.C.
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