Flow distributing device, heavy oil viscosity decreasing exploitation system and extraction method thereof

Abstract

The invention discloses a flow distributing device, a heavy oil viscosity decreasing exploitation system and an extraction method thereof. The flow distributing device comprises a hollow body and a sliding sealing block. The hollow part is a through hole, and the upper end and the lower end of the through hole are used for being connected with oil pipes. A first opening and a second opening are formed in the side wall of the body in the axial direction. A first check valve communicated with the first opening is arranged on the first opening, and a second check valve communicated with the second opening is arranged on the second opening. The sliding sealing block is arranged in the hollow part of the body in a sealed mode, can be fixed to a pumping rod, and can move axially along with the pumping rod. The heavy oil viscosity decreasing exploitation system with the flow distributing device and the extraction method thereof can effectively extract heavy oil.

Description

technical field [0001] The invention relates to the field of heavy oil production, in particular to a flow diversion device, a heavy oil viscosity reduction production system and a production method thereof. Background technique [0002] At present, when exploiting heavy oil, it is necessary to take viscosity-reducing measures to reduce the viscosity of heavy oil and enhance its fluidity. Usually, the viscosity reduction measures include: burning the oil layer, steam stimulation, chemical viscosity reduction, electric heating, dilution process, etc. Especially for heavy oil in ultra-deep wells, since the burial depth of the oil layer is above 5000 meters and the formation temperature is as high as above 130 degrees Celsius, the crude oil has good fluidity in the reservoir. However, when the crude oil enters the wellbore and flows to the ground, as the temperature of the wellbore decreases, the viscosity of the heavy oil increases and it will gradually lose its fluidity. Ho...

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Problems solved by technology

However, on the one hand, due to the limited space in the hollow sucker rod, the amount of thin oil mixed into it can hardly achieve the expected viscosity reduction effect; on the other hand, the outer diameter of the sucker rod is increased after the sucker rod is made into a hollow structure , so that it has a large contact area with heavy oil, which will bring greater viscous resistance, resulting in difficulties in the downward movement of the rod string and the breakage of the sucker rod, etc.

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