14-08-2014 дата публикации
Номер: US20140224508A1
A method of providing at least one projection () on a tubular body () of the type required by the oil and gas industry for use in recovery of and transporting of crude oil or gas, namely oil-country-tubular goods (OCTG), said projection () having a predetermined form such as a blade, ribbing, or the like stand-off projection, by providing materials capable of being moulded, applying a mould to a tubular (OCTG) body, and moulding said materials using said mould onto said tubular body (). 1. A prefabricated tubular body for use downhole , comprising:integral centralizer formations, said formations being formed as projections molded directly onto the tubular body from moldable materials comprising a curable resin, ceramic particulate filler materials, and chopped carbon fiber.2. A prefabricated tubular body according to claim 1 , wherein the tubular body is formed by providing a resin-ceramic composite material of one of powders claim 1 , particles claim 1 , fibrils claim 1 , chopped fibers claim 1 , or beads claim 1 , including fillers or other molding auxiliaries claim 1 , and means for curing or setting the resin into a molded form on the tubular body.3. A prefabricated tubular body according to claim 2 , wherein said means for curing or setting the resin comprises a mold claim 2 , and the mold is utilized in a molded operation that comprises applying at least one appropriately contoured molding part of the mold to a tubular body claim 2 , loading the mold with resin-ceramic materials in predetermined amounts to form a desired composite claim 2 , by injecting the materials into the mold claim 2 , curing the materials in the mold claim 2 , and removing any mold part to leave a desired molded part formed on the tubular body.4. A prefabricated tubular body according to claim 1 , wherein after removal of the any mold part claim 1 , the tubular body is coated with resins claim 1 , paints claim 1 , or land surface finishing agents.5. A prefabricated tubular body according ...
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