Patent ID: 6523615
Filing Date: 2003-02-25
Classification: E21B,Y10S

Abstract:
A down-hole tubular with reduced corrosion, clogging, and fluid flow friction while producing fluids from a fluid producing formation, the down-hole tubular comprising:a tubular body having a sidewall made of a corrosion resistant alloy, the sidewall having a chromium content of at least 9% by weight throughout; wherein the sidewall up the tubular body defines an inside diameter surface interior to the sidewall, the inside diameter surface having been subjected to an electropolishing process, the resulting electropolished inside diameter surface having an arithmetic roughness value of less than 100 micro inches; and wherein in addition to an electropolishing process, said tubulars are produced by a process including the steps of: subjecting each inside diameter surface to a chemical pickling treatment to remove contaminants from each inside diameter surface; subjecting each inside diameter surface to a mechanical finishing treatment before electropolishing; subjecting each inside diameter surface to a post-electropolishing treatment to remove byproducts of the electropolishing treatment and assist drying; connecting the plurality of down-hole tubulars together to form a production pipe; and wherein the step of subjecting each inside diameter surface to a mechanical finishing step includes honing the inside diameter surface of each tubular with a brush consisting of hardened carbide beads formed on the ends of polyester brush bristles.