High-viscosity oil multi-pump station airtight pipeline conveying system
A pipeline transportation and pump system technology, applied in pipeline systems, pumps, pump devices, etc., can solve the problems of large oil evaporation loss, limited pressure, low boosting efficiency, etc., and achieve good safety, easy control, and good economy sexual effect
Inactive Publication Date: 2015-11-11
CHINA UNIV OF PETROLEUM (BEIJING) +1
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Problems solved by technology
However, it has the following disadvantages: due to the high viscosity of mixed thin heavy oil, the boosting efficiency of the centrifugal pump is very low. For example, according to the difference in the viscosity of a certain heavy oil mixed with thin oil, the efficiency of the existing centrifugal pump in a certain pipeline is about 40-60%. When the mixture is rare and the viscosity is high, the efficiency is even only about 20%, which reduces the economical efficiency of heavy oil transportation; and for a given oil product, the centrifugal pump can provide limited pressure, which is not conducive to the heavy oil recovery after the stop of transportation. start up
The reason why the long-distance conveying system of the multi-pump station of the screw pump adopts the open process operation mode is that the flow control of the screw pump is difficult
Due to the high oil temperature of mixed thin and heavy oil, this kind of screw pump open process has the disadvantages of large oil evaporation loss, and many oil transfer station equipments for construction and operation.
Method used
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[0029] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but should not be used to limit the scope of the present invention.
[0030] In the description of the present invention, it should be noted that unless otherwise specified, the meaning of "plurality" is two or more; the terms "upper", "lower", "left", "right", "inner ", "outside", "front end", "rear end", "head", "tail", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the inventi...
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The invention relates to the technical field of oil storage and transport, in particular to a high-viscosity oil multi-pump station airtight pipeline conveying system. The high-viscosity oil multi-pump station airtight pipeline conveying system comprises a plurality of sequentially connected pump stations, the pump stations comprise pump systems, the pump systems comprise a plurality of centrifugal pumps and a plurality of screw pumps, the centrifugal pumps and the screw pumps are in parallel connection, when the multiple centrifugal pumps are arranged, the centrifugal pumps are in series connection or parallel connection, and when the multiple screw pumps are arranged, the screw pumps are in series connection or parallel connection. According to the high-viscosity oil multi-pump station airtight pipeline conveying system, the advantages of conveying of the centrifugal pumps and the screw pumps are simultaneously achieved, and economical efficiency and safety of high-viscosity oil long-distance conveying are improved.
Description
technical field [0001] The invention relates to the technical field of petroleum storage and transportation, and relates to a closed pipeline transportation system for long-distance transportation of high-viscosity oil. Background technique [0002] Heavy oil is an unconventional oil and gas resource with high viscosity. In my country, it generally refers to the dynamic viscosity greater than 50mPa.s under formation conditions, or the kinetic viscosity of degassed crude oil greater than 100mPa.s at 50°C, or the density greater than 0.92g / cm at 20°C 3 high viscosity heavy crude oil. The fluidity of heavy oil is poor under the condition that the ground leaves the high-heat steam, the pressure drop of the pipeline is large, and the transmission efficiency is low. [0003] The heavy oil produced in a heavy oil production area in Xinjiang, my country, has an apparent viscosity of 2×10 at 50°C. 4 ~100×10 4 mPa·s, even at a high temperature of 70-80 °C, the viscosity is general...
Claims
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IPC IPC(8): F04B23/12F17D1/14
Inventor 邓道明刘霞李洪福薛润斌万宇飞陈曦韩龙学薛君昭
Owner CHINA UNIV OF PETROLEUM (BEIJING)