Invention Grant
- Patent Title: Multi stage chemical injection
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Application No.: US15773921Application Date: 2017-06-21
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Publication No.: US11078769B2Publication Date: 2021-08-03
- Inventor: Paul Gregory James , Ibrahim El Mallawany
- Applicant: Halliburton Energy Services, Inc.
- Applicant Address: US TX Houston
- Assignee: Halliburton Energy Services, Inc.
- Current Assignee: Halliburton Energy Services, Inc.
- Current Assignee Address: US TX Houston
- Agency: C Tumey Law Group, PLLC
- Agent Scott Richardson
- International Application: PCT/US2017/038503 WO 20170621
- International Announcement: WO2018/236368 WO 20181227
- Main IPC: E21B43/25
- IPC: E21B43/25 ; E21B34/10 ; E21B37/06 ; E21B34/06 ; E21B34/16 ; E21B43/16 ; E21B34/00 ; E21B33/068

Abstract:
Systems and method for injection a chemical into a wellbore. A chemical injection system may comprise a first valve, a chemical line, a pilot line, an injection line, and a backflow prevention valve disposable in the injection line. A production fluid recovery system may comprise a chemical injection system, a first valve, a pilot line, an injection line, a backflow prevention valve, a production tree, a wellhead, and production tubing. A method for actuating a valve in a chemical injection system may comprise pushing a fluid into a chemical line, pressurizing a pilot line to open a first valve, pushing the fluid through the first valve, increasing pressure in the pilot line to open a second valve, pushing the fluid through the second valve, pushing the fluid through a chemical line, and injecting fluid into a wellbore from the chemical line.
Public/Granted literature
- US20190071960A1 Multi Stage Chemical Injection Public/Granted day:2019-03-07
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