A colorless, odorless fuel, Nitrogen is a non-hydrocarbon inert gasoline employed for a range of functions in the drilling, workover and completion phases of oil and fuel wells, as nicely as in pigging and purging pipelines.
Utilised both in onshore and offshore circumstances, applications for nitrogen include very well stimulation, injection and stress testing, Improved Oil Recovery (EOR), reservoir strain servicing, nitrogen floods and inert gasoline carry. Additionally, nitrogen can be used to aid avoid flammable gases from igniting and defend tubulars from downhole corrosion.
Utilized to guidance drilling operations, nitrogen can be used for instrument panel inerting, as nicely as flare gasoline inerting, and tension systems purging and tests. Also, nitrogen can be provided for the engine starters, controls, dry bulk transfer and hoisting methods. Supplying a dry air provide, nitrogen can extend the lifetime of some systems, as properly as stop breakdowns.
In workover and completion functions, nitrogen is an optimum option to displace nicely fluids in order to initiate stream and thoroughly clean wells mainly because of its minimal density and large stress attributes. The large-stress gasoline is also utilised for manufacturing stimulation via hydraulic fracturing. Also, nitrogen is used for cementing functions and controlling cement slurry weights.
Also, nitrogen is used to preserve tension in reservoirs that have either been depleted of hydrocarbons or experienced natural force reduction. Simply because nitrogen is immiscible (or does not combine) with oil and water, a nitrogen injection plan or nitrogen flood can be employed to go skipped pockets of hydrocarbons from an injection nicely to a output very well.
Nitrogen can also be applied in pigging and purging a pipeline. For example, nitrogen can be used as the driver to press the pigs by the pipe. Nitrogen can also be applied to purge the pipeline after pigging has been finished. In this case, the dry fuel is run by means of the line with no the pig to dry up any remaining water in the pipeline.
Also, nitrogen can be used in FPSOs and other situations wherever hydrocarbons are stored. In a approach named tank blanketing, nitrogen is utilized to an vacant storage facility, to boost security and supply a buffer for the entering hydrocarbons.
How Does Nitrogen Generation Function?
Produced by Dow Chemical in the seventies, nitrogen technology by means of hollow fiber membrane know-how has progressed more than the last various a long time. Now, the engineering presents onsite era by means of several output and capacity generators. Obtaining up to 99.9% purity stages, nitrogen generation has made a myriad of apps in the oil and gas subject much more cost-effective.
Nitrogen is generated by means of patented membrane filters. The approach commences by atmospheric air staying taken into a rotary screw compressor. In this article the air is compressed to a designated force and air flow. Then, the compressed air is saturated with three to 5 parts for each million of hydrocarbons and particulates. It is then released into the nitrogen generation process.
The air then enters a pre-filtration system, composed of both a demister or cyclone-sort water separator to remove up to 94% of cost-free liquids.
Next, the air travels via two coalescing filters the initial is a 1. micron coalescing filter. And quickly, the air travels to a .01 micron coalescing filter. These filters clear away ninety nine.9999% of all contaminants from the air, which is however in a vapor state and saturated with water and hydrocarbons.
Making certain the remaining contaminants are in a vapor condition, the air is then heated, increasing the dew stage. The air now enters an activated carbon vessel, in which the hydrocarbons are absorbed.
From listed here, the air travels by to a .01 micron particulate filter, which would make the air stream a specification of 8 to 10 components for each billion of contaminants. This ensures a high-excellent air is staying supplied to the membrane modules.
Now, the air is fed to a dehydration membrane. Below, the water is eradicated from the recently cleansed air, reaching dewpoints as lower as negative forty levels Fahrenheit. The dry air is then introduced to the nitrogen membranes.
In the nitrogen membranes, the oxygen is removed from the air, resulting in nitrogen at a purity amount of 90 to ninety nine%. Since the nitrogen is equipped at a 70-degree Fahrenheit dewpoint, added residual water vapor is then eradicated.
Giving huge discounts in comparison, onsite nitrogen generation is preferable over bulk nitrogen shipments. Moreover, nitrogen can be produced a numerous specs for an assortment of works by using.
Used nitrogen combo unit. Used nitrogen pumping unit..