Apparatus and method for isolating a section of tubing
AssigneeWeatherford/Lamb, Inc.
InventorsPaul David Metcalfe, Neil Andrew Abercrombie Simpson
Life of this patent
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Abstract
A method of isolating a section of downhole tubing comprises: running a length of expandable tubing (20) into a tubing-lined borehole (12, 14) and positioning the expandable tubing (20) across a section of tubing to be isolated; deforming at least portions of the expandable tubing (36, 40) to increase the diameter of the portions to sealingly engage the tubing (14) and to isolate the tubing section.
Claims30
A method of isolating a section of downhole tubing, comprising:
- running a length of expandable tubing into a tubing-lined borehole and positioning the expandable tubing across a section of tubing to be isolated, wherein the expandable tubing comprises an outer face having relatively hard elements held together in a matrix disposed thereon;
- and
- deforming at least one portion of the expandable tubing to increase the diameter of said portion to sealingly engage the tubing to be isolated.
A method of isolating a section of downhole tubing, comprising:
- running expandable tubing into a wellbore;
- positioning the expandable tubing across a section of tubing to be isolated, wherein the expandable tubing comprises an outer face having relatively hard elements held together in a matrix and one or more seal bands disposed thereon;
- and
- deforming the expandable tubing to increase a diameter thereof to sealingly engage the tubing to be isolated.
A method of isolating a section of downhole tubing, comprising:
- running expandable tubing into a wellbore;
- positioning the expandable tubing across a section of tubing to be isolated, wherein the expandable tubing comprises an outer face having relatively hard elements held together in a matrix and one or more seal bands disposed thereon;
- and
- deforming a first end of the expandable tubing to form a fluid-tight seal between the expandable tubing and the tubing to be isolated;
- and
- deforming a second end of the expandable tubing to form a fluid-tight seal between the expandable tubing and the tubing to be isolated.
A method of isolating a section of downhole tubing, comprising:
- running a length of expandable tubing into a wellbore and positioning the expandable tubing across a section of wellbore to be isolated;
- and
- deforming at least a first portion of the expandable tubing to increase the diameter of said first portion to sealingly engage the wellbore to be isolated, the deformation accomplished with an expander tool having at least one radially extendable member that is urged outwards by the application of fluid pressure thereto, wherein the radially extendable member comprises one or more rollers each mounted on one or more slideable pistons that are sealably disposed within one or more recesses on the expander tool's outer surface.
Dependencies are inferred from the claim text.