CCUS: Dense-Phase CO₂ Injection Pumps Enter Batch Service at the Jilin Oilfield
A Chinese-built plunger-type dense-phase CO₂ injection pump has entered batch application in the Jilin oilfield's CO₂ pipeline project, where the operator had moved from supercritical compressor injection to dense-phase injection.
Lead
A dense-phase carbon dioxide injection pump developed by CNPC Bohai Equipment Manufacturing Co. (中国石油集团渤海石油装备制造有限公司) has entered batch application in the Jilin oilfield's CO₂ pipeline project, according to the China General Machinery Industry Association.
Facts
The application. The association's notice states that the pump has been applied in the CO₂ pipeline project at the Jilin oilfield, and describes it as a step in the company's new-energy equipment portfolio. (Source: the China General Machinery Industry Association.)
The equipment set around it. The same company states it has supplied the Jilin oilfield CCUS project with equipment from supercritical CO₂ line pipe through to wellhead injection equipment, and that the dense-phase injection pump completes that set. (Sources: the China General Machinery Industry Association; the CNPC News Center (中国石油新闻中心), 2025-04-16.)
The design basis. The project documentation states that the oilfield adopted an operating model of low-pressure supercritical transport with high-pressure supercritical injection, and that dense-phase injection replaced supercritical compressor injection. (Source: the CNKI Science and Technology Achievement Database (中国知网科技成果库), on the development and application of a dense-phase CO₂ pump, first completing unit: the research institute of CNPC Bohai Equipment Manufacturing Co.)
The published machine parameters. Medium temperature 5–25 °C; theoretical displacement 15 m³/h; suction pressure 8.5–12 MPa; maximum discharge pressure 25 MPa; pump efficiency not less than 45%. (Source: the CNKI Science and Technology Achievement Database.)
The stated design approach. The pump is a plunger type: a crankshaft converts the motor's rotation into reciprocating plunger motion, the plunger changes the volume of the plunger chamber, and check valves confine the medium to one direction and raise its pressure. The documentation names three innovations — a straight-through small-clearance quick-change valve that reduces the valve clearance volume; a thermal-hydraulic coupled numerical simulation method for the pump's dynamic characteristics; and an injection-system design that records and analyses system parameters and automatically controls the pressurisation and cooling systems. (Source: the CNKI Science and Technology Achievement Database.)
The line pipe side. The same company states it has developed supercritical CO₂ line pipe with the largest wall thickness and largest diameter in China, described as capable of transporting CO₂ at ten-million-tonne scale. (Source: the CNPC News Center, 2025-04-16.)
Where this connects on this site
- Why the clearance volume decides the efficiency of this duty, and why 45% is the project's own number: CO₂ Injection Pumps: Why the Clearance Volume Decides the Efficiency
- The high-temperature branch this machine's fluid belongs to, and where its evidence stops: Molten-Salt Pumps: Why Temperature Decides the Machine, Not Pressure
- The selector: chempumpselect.com
Sources
| # | Fact | Source |
|---|---|---|
| 1 | Dense-phase CO₂ injection pump developed by 渤海装备 applied in the Jilin oilfield 吉输管道 project; the company's existing supply of supercritical CO₂ line pipe and wellhead injection equipment to the same CCUS project; batch production and application | 中国通用机械工业协会 — https://www.cgmia.org.cn/Web/News/Detail/24468 |
| 2 | CO₂ line pipe with the largest wall thickness and diameter in China, ten-million-tonne-scale transport capability; the company's CCUS equipment scope across capture, transport, storage and use | 中国石油新闻中心（中国石油网）, 2025-04-16 — https://news.cnpc.com.cn/system/2025/04/16/030160924.shtml |
| 3 | Design basis (low-pressure supercritical transport, high-pressure supercritical injection; dense-phase injection replacing supercritical compressor injection); medium temperature 5–25 °C; theoretical displacement 15 m³/h; suction pressure 8.5–12 MPa; maximum discharge pressure 25 MPa; pump efficiency ≥45%; the plunger architecture; the straight-through small-clearance quick-change valve; the thermal-hydraulic coupled simulation method; the automatic pressurisation and cooling control system | 中国知网科技成果库「CO2密相泵研制及应用」，第一完成单位 中国石油集团渤海石油装备制造有限公司研究院 |
Note on sourcing. Items 1–3 report a company application and a project design record. We record only the verifiable layer — the duty, the machine parameters and the design approach as published. We do not repeat efficiency-gain claims made in company material, and we do not rank or recommend suppliers.
What the source does not state
The sources do not state the number of pumps installed, the operating hours accumulated, the measured in-service efficiency, the maintenance interval, the wellhead injection pressure actually achieved in service, or the reservoir response.
Update note
This item is a dated record of a publicly reported application. We append corrections rather than rewrite history; corrections are marked Correction with the date.