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Circulation of Chemical Injection Fluids within Wellbore

IP.com Disclosure Number: IPCOM000243572D
Publication Date: 2015-Oct-01
Document File: 4 page(s) / 346K

Publishing Venue

The IP.com Prior Art Database

Abstract

Described in this publication is a new method of reducing exposure of Chemical Injection Fluids to wellbore properties. This new configuration of control lines allows for the circulation of control line fluids with or without simultaneous injection. Multiple configurations can be used and may be selected depending on preferred hanger feed-thru allowance, topside pump configuration, chemical injection fluid weight, or wellbore properties.

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Circulation of Chemical Injection Fluids within Wellbore

ABSTRACT

Described in this publication is a new method of reducing exposure of Chemical Injection Fluids to wellbore properties. This new configuration of control lines allows for the circulation of control line fluids with or without simultaneous injection. Multiple configurations can be used and may be selected depending on preferred hanger feed-thru allowance, topside pump configuration, chemical injection fluid weight, or wellbore properties.

Typical Operation

This diagram shows how the chemical injection system could be managed in a typical well. A single control line is plumbed from an HPU (hydraulic power unit), through a Tubing Hanger, to a check valve, and terminated into the wellbore. The typical method for operating a chemical injection system is to begin pumping with the HPU when chemical placement is needed. When chemicals are no longer needed, the HPU will be turned off and the fluid will sit static inside the control line.

Circulation without flow

This diagram shows how the chemical injection system could be managed without injecting fluids into the wellbore. This would be desirable where well production is stopped and continuing the injection would create a high concentration of chemical injection fluid in one area of the wellbore. With the configuration in “Method 1”, allowing the chemical injection fluids to circulate during this time would reduce exposure of the chemical injection fluids to the w...