A deep sea heavy oil collection device

Abstract

The invention discloses a collecting device for thick oil in deep sea, and aims at reducing viscosity of high-viscosity thick oil during oil production, improving the flowability of the thick oil, and smoothly producing the thick oil deposit. The device comprises a main oil pipe, a hollow oil pumping rod and an oil well barrel; a water separating pipe is arranged on the oil well barrel; the lower end of the main oil pipe extends into the oil well barrel; a screw pump is arranged in the main oil pipe; a main working screw of the screw pump is connected with the oil pumping rod; a sand preventing sieving pipe is arranged at the inner lower part of the oil well barrel; a sieving pipe oil outlet is formed in the top part of the sand preventing sieving pipe and communicated with an oil inlet of the screw pump; a cable is arranged in the oil pumping rod; a power supply is connected to one end of the cable. The device has the beneficial effects that the thick oil can be reasonably heated, so that the viscosity can be reduced, and the thick oil can be produced conveniently; carbon dioxide and water vapor can be charged to reduce the viscosity of crude oil to be raised or the raised crude oil.

Description

technical field [0001] The invention belongs to the technical field of oil reservoir exploitation, and in particular relates to a deep-sea heavy oil collection device. Background technique [0002] Heavy oil reservoirs are widely distributed in the world. According to statistics, the geological reserves of heavy oil (including bitumen) reservoirs are at least four times that of proven conventional crude oil reserves, and even more than six times in optimistic estimates. With the exploration of deep water, deep water heavy oil has received more and more attention, and its exploitation and development activities have also been carried out all over the world. [0003] However, the water depth of deep-water oil fields is generally between 500 and 2,500 meters. Due to factors such as its deep depth, a low-temperature area will be formed on the seabed. In addition, the temperature sensitivity of heavy oil and its own high viscosity, so in the low-temperature area. The flow is dif...

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Problems solved by technology

[0003] However, the water depth of deep-water oil fields is generally between 500 and 2,500 meters. Due to factors such as its deep depth, a low-temperature area will be formed on the seabed. In addition, the temperature sensitivity of heavy oil and its own high viscosity, so in the low-temperature area. Difficulty flowing, or even gradually losing fluidity, so that the oil well cannot maintain normal production

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