Patent
Method and means for corrosion protection of cables exposed to underground environments
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TLDR
In this article, a flexible pumping strand used for oil wells is protected from deterioration in corrosive underground and underwater environments by jacketing the cable with a plastic sheath and pumping a corrosion-inhibiting liquid having a specific gravity similar to that of the immediate underground environment from the surface through the strand and out the lower end of the strand while maintaining a slight positive pressure within the strand or cable.Abstract:
Stranded cable such as flexible pumping strand used for oil wells is protected from deterioration in corrosive underground and underwater environments by jacketing the cable with a plastic sheath and pumping a corrosion-inhibiting liquid having a specific gravity similar to that of the immediate underground environment from the surface through the strand and out the lower end of the strand while maintaining a slight positive pressure within the strand or cable.read more
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Method of inhibiting corrosion
William L. Adams,Gary R. Chesnut +1 more
TL;DR: In this paper, a corrosion inhibition composition formed as a water-external emulsions having an oil soluble organic film forming type of corrosion inhibitor in the dispersed phase thereof is disclosed for downhole well applications.
Patent
Inhibiting corrosion caused by aqueous aldehyde solutions
Stephen R. Keenan,Jonathan Collins,Sunder Ramachandran,Vladimir Jovancicevic,Rose Tompkins,Grahame N. Taylor,Richard L. Martin,Michael L. Walker +7 more
TL;DR: Aldehydes useful as H2S sulfide scavengers may be corrosive to some metals such as steel, iron, and aluminum as mentioned in this paper, but the corrosive effect of the scavengers can be mitigated by employing a corrosion inhibitor selected from the group consisting of a di-basic soluble phosphate salt, a tri-basic solvers, a phosphate ester, a thiophosphate ester and a thioamine, and combinations thereof.
Patent
Protecting steel and ferrous metals against H2 S corrosion
Rozenfeld Iosif L,Brusnikina Vera M,Frolova Larisa,Alevtina A. Lyashenko,Jury V. Sokolov,Bocharov Boris,Alexandr V. Fokin,Nikolai E. Legezin,Ekaterina V. Dergobuzova,Altshuler Boris N,Saida A. Zelenaya,Emma S. Korobova +11 more
TL;DR: In this article, an antifoaming inhibitor of hydrogen sulphide corrosion was proposed, which is a compound of the general formula: "STR1## where R is a divalent normal or branched alkyl containing from 1 to 6 carbon atoms, n=1 or 2; when n = 1 R' and R" are hydrogen, normal or branching alkyls containing from 3 to 14 carbon atoms.
Patent
Load bearing member having protective coating and method therefor
Xiaoyuan Chang,Hong Yang +1 more
TL;DR: A load bearing member includes at least one elongated tension member having at least wire and a protective coating on the elongated-tension member as discussed by the authors, which includes a first corrosion inhibitor having an oxide-forming metal, a second corrosion inhibitor with a rare earth metal, and a third corrosion inhibitor using an organic material.
Patent
Means for preventing damage to jacketed flexible pumping strand
TL;DR: In this paper, a flexible pumping strand is used to prevent the ballooning of a plastic jacket on a flexible strand due to filling of the well with gas by providing an assembly including a preset pressure release valve in the lower portions of the strand to quickly release fluid from the interior of a strand to the surrounding environment.
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Method of protecting metal surfaces against hydrogen sulfide corrosion
Donald C Bond,Savoy Michael +1 more
TL;DR: In this paper, a method of protecting underground metal equipment against corrosion by hydrogen sulfide was proposed, which relates particularly to the prevention of hydrogen sulphide corrosion of the metal parts buried in oil wells drawing sour crudes.