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Waste Gas Disposal

IP.com Disclosure Number: IPCOM000237683D
Publication Date: 2014-Jul-02
Document File: 1 page(s) / 51K

Publishing Venue

The IP.com Prior Art Database

Abstract

In the present state of the oil business, concern is high for environmental issues. In situations where a well is producing gas, the threshold of profitability depends on several factors including the volume of gas, the salability of the gas and the existence of a collection system. The old practice of venting or flaring the gas in many locations may now be illegal or heavily controlled. This invention concerns methods and equipment to dispose of the unprofitable gas by injecting it into candidate disposal formations. These disposal wells are typically used for the waste water that is produced with the oil. Direct injection of the gas into a disposal well would require very high pressure to overcome the formation pressure in the disposal zone. The invention is specific to injecting the gas into a pump that is being used to dispose of the waste water and having the waste water transport the entrained gas to the location of the disposal zone. This has the benefit of adding the weight of the column of fluid to the gas pressure when it arrives at the disposal zone and reducing the boost pressure that the gas would normally require.

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Waste Gas Disposal

 

In the present state of the oil business, concern is high for environmental issues. In situations where a well is producing gas, the threshold of profitability depends on several factors including the volume of gas, the salability of the gas and the existence of a collection system. The old practice of venting or flaring the gas in many locations may now be illegal or heavily controlled. This invention concerns methods and equipment to dispose of the unprofitable gas by injecting it into candidate disposal formations. These disposal wells are typically used for the waste water that is produced with the oil. Direct injection of the gas into a disposal well would require very high pressure to overcome the formation pressure in the disposal zone. The invention is specific to injecting the gas into a pump that is being used to dispose of the waste water and having the waste water transport the entrained gas to the location of the disposal zone. This has the benefit of adding the weight of the column of fluid to the gas pressure when it arrives at the disposal zone and reducing the boost pressure that the gas would normally require.

 

   

 

   

 

               


There are three separate cases defined by the volume of gas and available pressure. A simple system is for low volume of gas. Gas can be piped to the pump entrance and drawn by the natural venturi formed at the pump intake. A system with some similarities is taught in US patent #7,882,896 which pertains to removing gas from a seabed caisson pump assembly. For larger gas volumes US patent #7,997,335 teaches the use of jet pump configured within the body of the pump. Both of these methods are subject to pump performance degradation due to the gas and p...