초록 ▼

The process of providing corrosion protection in a deep, offshore, corrosive gas well containing acid gases such as H2S or CO2 by continuously circulating a manufactured carrier oil containing a corrosion inhibitor can be improved where that well or a nearby well produces a condensate that contains

The process of providing corrosion protection in a deep, offshore, corrosive gas well containing acid gases such as H2S or CO2 by continuously circulating a manufactured carrier oil containing a corrosion inhibitor can be improved where that well or a nearby well produces a condensate that contains high boiling, organic compounds. Determinations can be made and utilized concerning whether, and to what extent, portions of such a carrier oil can be replaced by portions of such a condensate.

대표청구항 ▼

A process for controlling corrosion in a well which produces a hot, highly pressurized, corrosive gas, by continuously injecting an oil-phase liquid containing an oil-soluble corrosion inhibitor, comprising: treating such a well which (a) is located remotely with respect to the source of a manufactu

A process for controlling corrosion in a well which produces a hot, highly pressurized, corrosive gas, by continuously injecting an oil-phase liquid containing an oil-soluble corrosion inhibitor, comprising: treating such a well which (a) is located remotely with respect to the source of a manufactured carrier oil that is capable of maintaining an oil-phase liquid at the bottomhole conditions within the well to be treated and (b) produces, or is near a well which produces, a gas which contains a significant proportion of high-boiling, oil-soluble, organic compounds which condense as a liquid phase when the produced gas is cooled and depressurized; determining phase characteristics, at the bottomhole temperature and pressure in the well to be treated, of mixtures of the gas produced by the well to be treated, a condensate comprising the high boiling components of gas produced from that well or a nearby well, a corrosion inhibitor which is effective at the bottomhole temperature within the well to be treated and a manufactured carrier oil capable of containing that corrosion inhibitor in a separate liquid-phase in contact with the gas produced by the well to be treated at the reservoir pressure and temperature of the well to be treated; and continually circulating into the well to be treated a mixture of the so-tested components in proportions such that the mixture is capable of maintaining a corrosion inhibitor-containing liquid-phase at the bottomhole pressure and temperature of the well to be treated when the amount of the manufactured carrier oil is less than that needed to maintain such a liquid phase when none of the condensate is present but enough of the manufactured carrier oil is present to maintain such a liquid-phase during fluctuations of the extent likely to occur in the composition of the condensate or reservoir temperature or pressure in the well to be treated.