Method of selecting tubular members
A method of selecting tubular members.
1. A method of selecting a group of tubular members for subsequent radial expansion, comprising:
radially expanding the ends of a representative sample of the group of tubular members;
measuring the amount of necking of the walls of the radially expanded ends of the sampled tubular members; and
if the radially expanded ends of the sampled tubular members do not exhibit necking for radial expansions of up to about 25%, then accepting the group of tubular members for subsequent radial expansion.
2. A method of selecting a group of tubular members for subsequent radial expansion, comprising:
radially expanding the ends of a representative sample of the group of tubular members until each of the tubular members fail; and
if the radially expanded ends of the sampled tubular members do not fail for radial expansions of up to about 30%, then accepting the group of tubular members for subsequent radial expansion.
3. A method of selecting a group of tubular members for subsequent radial expansion, comprising:
testing a representative sample of the group of tubular members;
measuring one or more parameters of the representative sample; and
if the measured parameters of the representative sample are acceptable, then accepting the group of tubular members for subsequent radial expansion.
4. The method of claim 3 , wherein one of the measured parameters comprises the wall thickness; and wherein the measured parameter of wall thickness is acceptable if the wall thickness that varies less than about 8%.
5. The method of claim 3 , wherein one of the measured parameters comprises the hoop yield strength; and wherein the measured parameter of hoop yield strength is acceptable if the hoop yield strength varies less than about 10%.
6. The method of claim 3 , wherein one of the measured parameters comprises surface imperfections; and wherein the measured parameter of surface imperfections is acceptable if the surface imperfections are less than about 8% of the wall thickness.
7. A method of selecting a group of tubular members for subsequent radial expansion, comprising:
testing a representative sample of the group of tubular members;
measuring one or more parameters of the representative sample; and
if the measured parameters of the representative sample are acceptable, then accepting the group of tubular members for subsequent radial expansion;
wherein the measured parameters comprises the wall thickness, the hoop yield strength, the surface imperfections, the necking, and failure for radial expansion;
wherein the measured parameter of wall thickness is acceptable if the wall thickness that varies less than about 8%;
wherein the measured parameter of hoop yield strength is acceptable if the hoop yield strength varies less than about 10%;
wherein the measured parameter of surface imperfections is acceptable if the surface imperfections are less than about 8% of the wall thickness;
wherein the measured parameter of necking is acceptable if no necking occurs for radial expansions of up to about 25%; and
wherein the measured parameter of failure for radial expansion is acceptable if there is no failure for radial expansions of up to about 30%.
8. A method of selecting a group of tubular members for subsequent radial expansion, comprising:
testing a representative sample of the group of tubular members;
measuring one or more parameters of the representative sample; and
if the measured parameters of the representative sample are acceptable, then accepting the group of tubular members for subsequent radial expansion;
wherein the measured parameters comprises one or more of the following: the wall thickness, the hoop yield strength, the surface imperfections, the necking, and failure for radial expansion;
wherein the measured parameter of wall thickness is acceptable if the wall thickness that varies less than about 8%;
wherein the measured parameter of hoop yield strength is acceptable if the hoop yield strength varies less than about 10%;
wherein the measured parameter of surface imperfections is acceptable if the surface imperfections are less than about 8% of the wall thickness;
wherein the measured parameter of necking is acceptable if no necking occurs for radial expansions of up to about 25%; and
wherein the measured parameter of failure for radial expansion is acceptable if there is no failure for radial expansions of up to about 30%.
9. A method of selecting a group of tubular members for subsequent radial expansion, comprising:
testing a representative sample of the group of tubular members;
measuring one or more parameters of the representative sample; and
if the measured parameters of the representative sample are acceptable, then accepting the group of tubular members for subsequent radial expansion;
wherein the measured parameters comprises two or more of the following: the wall thickness, the hoop yield strength, the surface imperfections, the necking, and failure for radial expansion;
wherein the measured parameter of wall thickness is acceptable if the wall thickness that varies less than about 8%;
wherein the measured parameter of hoop yield strength is acceptable if the hoop yield strength varies less than about 10%;
wherein the measured parameter of surface imperfections is acceptable if the surface imperfections are less than about 8% of the wall thickness;
wherein the measured parameter of necking is acceptable if no necking occurs for radial expansions of up to about 25%; and
wherein the measured parameter of failure for radial expansion is acceptable if there is no failure for radial expansions of up to about 30%.
10. A method of selecting a group of tubular members for subsequent radial expansion, comprising:
testing a representative sample of the group of tubular members;
measuring one or more parameters of the representative sample; and
if the measured parameters of the representative sample are acceptable, then accepting the group of tubular members for subsequent radial expansion;
wherein the measured parameters comprises three or more of the following: the wall thickness, the hoop yield strength, the surface imperfections, the necking, and failure for radial expansion;
wherein the measured parameter of wall thickness is acceptable if the wall thickness that varies less than about 8%;
wherein the measured parameter of hoop yield strength is acceptable if the hoop yield strength varies less than about 10%;
wherein the measured parameter of surface imperfections is acceptable if the surface imperfections are less than about 8% of the wall thickness;
wherein the measured parameter of necking is acceptable if no necking occurs for radial expansions of up to about 25%; and
wherein the measured parameter of failure for radial expansion is acceptable if there is no failure for radial expansions of up to about 30%.
11. A method of selecting a group of tubular members for subsequent radial expansion, comprising:
testing a representative sample of the group of tubular members;
measuring one or more parameters of the representative sample; and
if the measured parameters of the representative sample are acceptable, then accepting the group of tubular members for subsequent radial expansion;
wherein the measured parameters comprises four or more of the following: the wall thickness, the hoop yield strength, the surface imperfections, the necking, and failure for radial expansion;
wherein the measured parameter of wall thickness is acceptable if the wall thickness that varies less than about 8%;
wherein the measured parameter of hoop yield strength is acceptable if the hoop yield strength varies less than about 10%;
wherein the measured parameter of surface imperfections is acceptable if the surface imperfections are less than about 8% of the wall thickness;
wherein the measured parameter of necking is acceptable if no necking occurs for radial expansions of up to about 25%; and
wherein the measured parameter of failure for radial expansion is acceptable if there is no failure for radial expansions of up to about 30%.