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Beijing, China

China National Offshore Oil Corporation, or CNOOC Group , is a major national oil company in China. It is the third-largest national oil company in the People's Republic of China, after CNPC and China Petrochemical Corporation . The CNOOC Group focuses on the exploitation, exploration and development of crude oil and natural gas in offshore China.The company is owned by the government of the People's Republic of China, and the State-Owned Assets Supervision and Administration Commission of the State Council assumes shareholder rights and obligations on the government's behalf. One subsidiary, CNOOC Limited, is listed on the Hong Kong exchange; the other, China Oilfield Services, is listed on the Hong Kong and New York exchanges. Wikipedia.


Patent
China Oilfield Services Ltd. and China National Offshore Oil Corporation | Date: 2014-01-24

The present invention relates to an oil recovery process with composition-adjustable multi-component thermal fluid, the process comprises: adding oxygen produced by air together with fuel and water into a reactor, in which the oxygen and the fuel combust to produce flue gas and heat, the heat heats water to generate hot water/steam, and then the flue gas and the hot water/steam are mixed to form multi-component thermal fluid, wherein the purity of oxygen added into the reactor is controlled so as to produce the multi-component thermal fluid with various mass ratios of flue gas to hot water/steam; then the obtained multi-component thermal fluid with various mass ratios of flue gas to hot water/steam are injected into various types of oil reservoirs for oil recovery. The oil recovery process of the present invention is applicable for various types of crude oil reservoirs.


Patent
China National Offshore Oil Corporation and China Oilfield Services Ltd. | Date: 2013-11-20

A pushing and jam-releasing pup joint of a formation tester comprises a first jam-releasing arm (


Patent
China Oilfield Services Ltd. and China National Offshore Oil Corporation | Date: 2013-10-29

The present application relates to a high temperature carbon dioxide corrosion inhibitor comprising the following components by mass percent: amide compound 1550%, organic alkynol 1025%, mercaptan acid 515%, piperidine 525%, mercaptopyridine 515%, and solvent 2560%. The corrosion inhibitor has excellent corrosion inhibition for CO


Patent
China National Offshore Oil Corporation and China Oilfield Services Ltd. | Date: 2013-12-25

A high-pressure fluid mixing pump control system and a fluid suction control method, the system comprises a transmission threaded rod and a resolver sensor, wherein: one end of the transmission threaded rod is connected to an oil cylinder piston of a mixing pump, while the other end of the transmission threaded rod is connected to the resolver sensor either directly or via a rotary element that rotates coaxially with the transmission threaded rod. The high-pressure fluid mixing pump control system implements precision control via a mechanical means, converts a linear motion of the piston into a rotary motion, and utilizes the resolver sensor for precision measurement of a rotation angle, thus acquiring a piston displacement amount, and finally acquiring a suction volume. At the same time, an accelerator and an electric brake are also designed, for controlling starting and stopping of the mixing pump.


Patent
China National Offshore Oil Corporation and China Oilfield Services Ltd. | Date: 2013-12-25

A method of formation testing and a formation testing instrument, comprising a first pump, a dual packer module, a reverse injection module and a second pump, the dual packer module being provided with a support arm at one side thereof capable of setting after deployed; and the dual packer module being provided with first and second probes at the other side, wherein the first probe is located above the second probe and the first and second probes can establish a channel with the formation; the second pump injecting the acidizing liquid in the reverse injection module into the fluid region in the formation by the second probe; and the first pump sucking the fluid in the formation by the first probe.

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