Composite inflatable downhole packer or bridge plug
First Claim
1. An inflatable packer assembly comprising:
- a central mandrel;
an inflatable bladder element surrounding the central mandrel;
a longitudinal rib member disposed adjacent the bladder element;
an end sleeve radially surrounding said central mandrel, bladder element and rib member, said end sleeve having a first portion comprised of composite material and a second metallic portion.
1 Assignment
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Accused Products
Abstract
Inflatable packer assemblies and bridge plugs that incorporate selective components made of a composite material, thereby providing improvements in weight, drillability and corrosion resistance. A through-tubing packer assembly is described having end sleeves fashioned partially from composite material of high strength fiber and polymer resin. The inflatable packer element has longitudinal ribs fashioned from composite material with a specialized cross-section having a larger cross-section of rib material in locations where additional bending resistance is required and permits additional elastomeric material to be placed about the ribs in sealing areas. An external casing packer is also described having a composite valve assembly and central mandrel formed primarily of composite material. The mandrel includes metallic fittings for threaded attachments to be made.
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Citations
25 Claims
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1. An inflatable packer assembly comprising:
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a central mandrel;
an inflatable bladder element surrounding the central mandrel;
a longitudinal rib member disposed adjacent the bladder element;
an end sleeve radially surrounding said central mandrel, bladder element and rib member, said end sleeve having a first portion comprised of composite material and a second metallic portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An inflatable packer assembly comprising:
a central mandrel having;
a mandrel body comprised of composite material; and
a metallic portion integrally formed within the mandrel body;
an inflatable bladder element surrounding the central mandrel;
a longitudinal rib member disposed adjacent the bladder element; and
an end sleeve radially surrounding said central mandrel, bladder element and rib member. - View Dependent Claims (11, 12, 13, 14, 15)
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16. An inflatable packer assembly comprising:
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an inflatable bladder assembly; and
an end sleeve located at one axial end of the bladder assembly to secure the bladder assembly to a mandrel, wherein the end sleeve comprises;
a first portion comprised of a composite material consisting essentially of high strength fiber in a resin matrix; and
a second, metallic portion. - View Dependent Claims (17, 18, 19, 20)
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21. An inflatable packer assembly comprising:
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a central mandrel having a pair of axial ends;
an inflatable bladder element surrounding the central mandrel;
a valve collar secured to one axial end of the central mandrel, the valve collar being constructed of composite material and retaining a valve assembly for selective transmission of fluid to the inflatable bladder element for inflation of the bladder element. - View Dependent Claims (22, 23, 24, 25)
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Specification