Liner top test packer
AssigneeBaker Hughes Incorporated
InventorsGordon Robert James Mackenzie, Mark Edward Plante, Richard Travis White, David Alan Dolyniuk
Life of this patent
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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.
Claims16
A well workstring assembly comprising:
- (a) an expandable sealing element for sealing an annulus between a workstring tube and a wellbore wall having a well bore liner hanger secured thereto;
- (b) an expandable anchoring element for securing said workstring tube to said well bore wall;
- and,
- (c) a liner hanger engagement tool having a rotational drive assembly with said workstring tube, said drive assembly having a calibrated failure mechanism for securing said hanger engagement tool at a position of disengagement from said anchoring and sealing elements.
A wellbore workstring having a packer assembled therewith, said packer comprising:
- (a) an expandable bore sealing element;
- (b) an expandable bore anchoring element;
- (c) a liner hanger engaging element;
- and,
- (d) a tripping mechanism linking said liner hanger engaging element with said bore sealing element and said bore anchoring element to expand said sealing element and anchoring element upon exceeding a predetermined workstring load on said hanger engaging element.
A liner top test packer having an expandable sealing element, an expandable casing anchor element, and a liner top milling tool, said milling tool connected to a tripping mechanism having a calibrated shear device whereby structural failure of said shear device expands said anchor element.
A method of testing the hydrodynamic seal of a wellbore liner ger set within a supporting casing bore, the method comprising the steps of:
- (a) assembling a wellbore workstring having a liner hanger engaging element, anchor slips and a packer element;
- (b) running said workstring into a wellbore casing having a liner hanger;
- (c) engaging said hanger engaging element against said liner hanger to set said anchor slips and packer element against said casing above said liner hanger;
- and,
- (d) imposing a pressure differential across said liner hanger.
Dependencies are inferred from the claim text.