Abstract: A novel dry powder inhaler. By providing a plurality of capsule chambers (1a, 1b, 1c, 1d) arranged in parallel in a capsule dry powder inhalation device, a medicine dispenser containing active components of a composite product or their mixture separately is provided. The dry powder inhaler has a simple structure and is convenient to operate. In addition, the parameters of air inlet channels and an air outlet channel can be adjusted by means of each capsule chamber (1a, 1b, 1c, 1d) according to the properties of powder of a medicine or a combination, so as to provide an appropriate particle distribution for each active component.

Abstract: A well configuration and method of increasing production from a hydrocarbon well having pre-existing production tube. A composite velocity string having an outer diameter smaller than the inner diameter of the production tube is installed in the production tube so that an annular gap is formed between the outer surface of the velocity string and the inner surface of the production tube. Production from the well is increased because the coefficient of fluid flow friction through the composite velocity string, and the amount of heat loss through the composite velocity string, are reduced compared to a steel velocity string. Installation efficiency is also increased because the composite velocity string is much lighter than a steel velocity string.

Abstract: A well configuration and method of increasing production from a hydrocarbon well having pre-existing production tube. A composite velocity string having an outer diameter smaller than the inner diameter of the production tube is installed in the production tube so that an annular gap is formed between the outer surface of the velocity string and the inner surface of the production tube. Production from the well is increased because the coefficient of fluid flow friction through the composite velocity string, and the amount of heat loss through the composite velocity string, are reduced compared to a steel velocity string. Installation efficiency is also increased because the composite velocity string is much lighter than a steel velocity string.

Abstract: A multi-layer, composite material, and products made therefrom, having the combined properties of high strength, high chemical resistance, and low permeation to chemicals and gas. The multi-layer composite material has a barrier layer, an intermediate binding layer, and a support layer. The barrier layer is polyphenylene sulfide compounded with an ethylene/glycidyl methacrylate copolymer. The intermediate binding layer is ethylene/glycidyl methacrylate copolymer. The support layer is polyamide compounded with an ethylene/glycidyl methacrylate copolymer.