| 摘要 |
<p>A packer in the form of an inflatable elongate elastic sleeve is commonly employed as a temporary plug to seal off part of an oil well borehole from the rest. To prevent the sleeve from rupturing, it is commonly provided with internal wire-like reinforcing elements. Such sleeves suffer from failures where the sleeve extrudes between adjacent wires, and ruptures. The invention suggests a solution where the deformability of the wire reinforced region of the sleeve and the deformability of the bulk material making up the rest of the sleeve are matched to one another. The deformabilities are matched so that the tendency for the wires to de-bond is reduced. This is accomplished by modifying the nature of the material in the wire region, or the physical structure of the material, or by modifying the nature of the wires themselves.</p> |
