Tube manufacture
AssigneeWeatherford/Lamb, Inc.
InventorNeil Andrew Abercrombie Simpson
Life of this patent
Estimating the term…
Abstract
A method of forming expandable downhole tubing (10) comprises the steps of: providing a tubing section (12) of a first diameter; forming apertures in the tubing section (12); and then reducing the diameter of the apertured tubing section.
Claims23
A method of forming expandable downhole tubing, the method comprising:
- providing a tubing section of a first diameter;
- forming apertures in the tubing section;
- and
- reducing the first diameter of the apertured tubing section to a smaller second diameter, wherein a cross-sectional area of the tubing section is reduced.
A method of forming expandable downhole tubing, the method comprising:
- forming apertures in a sheet of a first width;
- forming the sheet into tubing of a first diameter;
- and
- reducing the first diameter of the tubing.
A method of forming expandable downhole tubing, the method comprising the steps of:
- providing a tubing section of a first diameter;
- forming apertures in the tubing section;
- and
- reducing the diameter of the apertured tubing section to a smaller second diameter by drawing the tubing section through reducing dies.
A method of forming expandable downhole tubing, the method comprising the steps of:
- providing a tubing section of a first diameter;
- forming diamond-shaped apertures in the tubing section;
- and
- reducing the diameter of the apertured tubing section to a smaller second diameter.
A method of forming expandable downhole tubing, the method comprising the steps of:
- forming apertures in a sheet by punching the sheet material;
- creating an uneven sheet material;
- flattening the uneven sheet material;
- and
- forming the flattened sheet material into expandable tubing.
A method of forming expandable downhole tubing, comprising:
- providing a tubing section of a first diameter;
- forming apertures in the tubing section;
- reducing the first diameter of the apertured tubing section to a smaller second diameter;
- and
- coating the tubing section in a fluid material which subsequently hardens, such that the material fills the apertures.
Dependencies are inferred from the claim text.