Field dressable inflatable packer

Claim 1

A field dressable inflatable packer comprising an inner tubing section, an elongated resilient sleeve element positioned over said tubing section and forming an annular chamber with said tubing section, said sleeve element comprising an elongated cured rubber tube having incorporated by curing therein at least one circumferential layer formed of from 20 to 40 per inch spaced apart stretchable nylon cord members having a diameter between about 0.002 and 0.005 of an inch and extending only longitudinally over the entire length of said rubber tube and in substantially parallel relationship with the longitudinal axis of said rubber tube and further characterized by the absence of any such cord member in said rubber tube transverse to said longitudinal axis of said rubber tube, clamp means slideably positioned on said tubing section connecting the ends of said sleeve element in fluidtight relationship with said tubing section, removable constraining means for constraining said clamp means in a predeterminable position on said tubing section and port means in said tubing section for injecting fluid into said annular chamber for inflating said sleeve element.