WELLBORE SCREEN, FILTER MEDIUM, AND METHOD
First Claim
Patent Images
1. A filter medium comprising at least two layers of woven metal meshes that differ from one another in at least one of:
- weave pattern, weave direction, fiber size, and fiber tension.
2 Assignments
0 Petitions
Accused Products
Abstract
There is provided a wellbore screen having a base pipe and a strip of filter medium wrapped around the base pipe. The strip of filter medium includes one or more layers of woven steel mesh of various weave patterns, fibers sizes, and/or thread tensions. During the construction of the screen, the strip is wrapped around the base pipe under high tension. The strip has two lengthwise edges that may overlap to form a bonded interface.
13 Citations
51 Claims
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1. A filter medium comprising at least two layers of woven metal meshes that differ from one another in at least one of:
- weave pattern, weave direction, fiber size, and fiber tension.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A wellbore screen comprising:
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an apertured base pipe; an intermediate filtering layer including a filter medium wrapped around the apertured base pipe, the filter medium comprising at least two layers of woven metal meshes, the at least two layers of woven metal meshes differ from one another in at least one of;
weave pattern, weave direction, fiber size, and fiber tension; andan outer apertured shell over the intermediate layer. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 19, 20, 21, 22, 23, 24)
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25. A wellbore screen comprising:
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an apertured base pipe; an outer apertured shell over the apertured base pipe; and filter cartridges comprising a filter medium, the filter cartridges being disposed in at least some of the apertures of one or both of the apertured base pipe and the outer apertured shell, the filter medium comprising at least two layers of woven metal meshes, the at least two layers of woven metal meshes differ from one another in at least one of;
weave pattern, weave direction, fiber size, and fiber tension. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33)
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34. A method for producing a wellbore screen, the method comprising:
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forming a filter tube by wrapping an intermediate layer, including a filter medium strip, about an apertured base pipe in a helical arrangement under tension, the filter medium strip comprising at least two layers of woven metal meshes, the at least two layers of woven metal meshes differ from one another in at least one of;
weave pattern, weave direction, fiber size, and fiber tension;positioning the filter tube within the long bore of an outer apertured sleeve; and securing the outer apertured sleeve and the filter tube together. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51)
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Specification