Pipe formability evaluation for expandable tubulars
AssigneeEnventure Global Technology, LLC
InventorsMark Shuster, Lev Ring
Life of this patent
Estimating the term…
Abstract
A method of testing a tubular member and selecting tubular members for suitability for expansion by subjecting a representative sample the tubular member to axial loading, stretching at least a portion of the tubular member through elastic deformation, plastic yield and to ultimate yield, and based upon changes in length and area calculating an expandability coefficient indicative of expandability of the tubular members and selecting tubular members with relatively high coefficients indicative of good expandability.
Claims45
A method for selecting a solid steel tubular member for suitability for downhole radial expansion and plastic deformation to form a steel wellbore casing on a basis comprising use of an expandability coefficient determined pursuant to a change in diameter of the solid steel tubular member resulting from a stress-strain test performed on the solid steel tubular member, while in a tubular shape, using tensile axial loading.
A method comprising:
- providing a solid steel tubular member;
- performing a stress-strain test on the solid steel tubular member using tensile axial loading while the solid steel tubular member is in a tubular shape, causing a change in diameter of the solid steel tubular member;
- determining an expandability coefficient of the solid steel tubular member based on the change in diameter from the stress-strain test;
- selecting another solid steel tubular member using the expandability coefficient;
- disposing the selected solid steel tubular member in an earthen wellbore;
- and
- radially expanding and plastically deforming the selected solid steel tubular member to form a steel wellbore casing.
A method comprising:
- providing a solid steel tubular member;
- performing a stress-strain test on the solid steel tubular member using tensile axial loading while the solid steel tubular member is in a tubular shape;
- collecting data as a result of the stress-strain test, the data including an outer diameter of the steel tubular member and an inner diameter of the steel tubular member;
- determining an expandability coefficient of the solid steel tubular member using the data;
- selecting another solid steel tubular member using the expandability coefficient;
- disposing the selected solid steel tubular member in an earthen wellbore;
- displacing an expansion device through the selected solid steel tubular member while in the wellbore to radially expand and plastically deform the selected solid steel tubular member.
A method for selecting a solid steel tubular member for suitability for downhole radial expansion and plastic deformation to form a steel wellbore casing on a basis comprising use of an expandability coefficient determined pursuant to a stress-strain test performed on the solid steel tubular member, while in a tubular shape, using tensile axial loading, wherein the expandability coefficient is calculated using the formula:
- f
- =
- ln
-
- b
- o
- b
- k
- ln
-
- L
- k
-
- b
- k
- I
- o
-
- b
- o
- Equation
-
-
- 1
- where,
- f—expandability coefficient;
- bo & bk—initial and final tube cross sectional area (inch^2);
- Lo & Lk—initial and final tube length (inch);
- b=(D^2−d^2)/4—cross section tube area;
- D=tube outside diameter;
- and
- d=tube inside diameter.
A method comprising:
- providing a solid steel tubular member;
- performing a stress-strain test on the solid steel tubular member using tensile axial loading while the solid steel tubular member is in a tubular shape;
- determining an expandability coefficient of the solid steel tubular member based on the stress-strain test;
- selecting another solid steel tubular member using the expandability coefficient;
- disposing the selected solid steel tubular member in an earthen wellbore;
- and
- radially expanding and plastically deforming the selected solid steel tubular member to form a steel wellbore casing;
- wherein the expandability coefficient is calculated using the formula:
- f
- =
- ln
-
- b
- o
- b
- k
- ln
-
- L
- k
-
- b
- k
- I
- o
-
- b
- o
- Equation
-
-
- 1
- where,
- f—expandability coefficient;
- bo & bk—initial and final tube cross sectional area (inch^2);
- Lo & Lk—initial and final tube length (inch);
- b=(D^2−d^2)/4—cross section tube area;
- D=tube outside diameter;
- and
- d=tube inside diameter.
A method comprising:
- providing a solid steel tubular member;
- performing a stress-strain test on the solid steel tubular member using tensile axial loading while the solid steel tubular member is in a tubular shape;
- collecting data as a result of the stress-strain test;
- determining an expandability coefficient of the solid steel tubular member using the data;
- selecting another solid steel tubular member using the expandability coefficient;
- disposing the selected solid steel tubular member in an earthen wellbore;
- displacing an expansion device through the selected solid steel tubular member while in the wellbore to radially expand and plastically deform the selected solid steel tubular member;
- wherein the expandability coefficient is calculated using the formula:
- f
- =
- ln
-
- b
- o
- b
- k
- ln
-
- L
- k
-
- b
- k
- I
- o
-
- b
- o
- Equation
-
-
- 1
- where,
- f—expandability coefficient;
- bo & bk—initial and final tube cross sectional area (inch^2);
- Lo & Lk—initial and final tube length (inch);
- b=(D^2−d^2)/4—cross section tube area;
- D=tube outside diameter;
- and
- d=tube inside diameter.
A method comprising:
- providing a solid steel tubular member;
- performing a stress-strain test on the solid steel tubular member using tensile axial loading while the solid steel tubular member is in a tubular shape;
- collecting data as a result of the stress-strain test;
- determining an expandability coefficient of the solid steel tubular member using the data;
- selecting another solid steel tubular member using the expandability coefficient;
- disposing the selected solid steel tubular member in an earthen wellbore;
- displacing an expansion device through the selected solid steel tubular member while in the wellbore to radially expand and plastically deform the selected solid steel tubular member;
- wherein the data includes a force measurement, an outer diameter of the steel tubular member, an inner diameter of the steel tubular member, or a combination thereof, and the determining an expandability coefficient includes calculating an anisotropy of the steel tubular member using a ratio of the data.
Dependencies are inferred from the claim text.