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High solidifying point crude oil exploiting device and high solidifying point crude oil exploiting method

A technology for oil production equipment and crude oil, which is applied in the fields of production fluid, earthwork drilling and production, wellbore/well components, etc., which can solve problems such as high energy consumption, increased oil production cost, and restriction of high-condensation crude oil production efficiency, and achieve a high input-output ratio , reduce the cost of oil production and alleviate the energy shortage

Active Publication Date: 2014-07-02
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the process of realizing the present invention, the inventor found that the prior art has at least the following problems: the above two mining methods have high energy consumption and large investment
The average daily power consumption of a single well for heating and decondensation with a hollow rod cable hot line on the pump is 849KW.h, and the investment for a single well is 189,500 yuan; This method greatly increases the cost of oil production due to its high energy consumption, which seriously restricts the production efficiency of high pour point crude oil

Method used

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  • High solidifying point crude oil exploiting device and high solidifying point crude oil exploiting method
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  • High solidifying point crude oil exploiting device and high solidifying point crude oil exploiting method

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Effect test

Embodiment 1

[0030] refer to figure 1 and image 3 , a high-condensation crude oil recovery device, comprising an oil well pump 1, an oil recovery tubing 2, a water-mixed tubing 4, and a double-pipe water-mixing device 6. The upper end of the oil well pump 1 is connected to the oil production tubing 2, and the oil production tubing 2 is formed by connecting a plurality of single oil pipes, and the connection mode is connected while lowering down the well. Due to the high wax content and high freezing point of high-condensation crude oil, the heat loss along the process of production and lifting will cause the temperature of the produced fluid to drop continuously, so that the high-condensation crude oil will be waxed and solidified at a certain point downhole, which is called the wax deposition point here. Below the waxing point, a double-pipe water mixing device 6 is provided between any two adjacent single oil pipes that make up the production tubing 2. The double-pipe water mixing devi...

Embodiment 2

[0034] refer to figure 1 and Figure 4 , in order to make the oil production tubing 2 and the water-mixed tubing 4 better connected to the wellhead, on the basis of Embodiment 1, the high pour point crude oil recovery device of this embodiment also includes a wellhead double-port flange device 3, and the wellhead double-port method The flange device 3 includes a high-pressure flange 27, and two eccentric holes are arranged on the high-pressure flange 27, and the two eccentric holes correspond to the eccentric hole 23 of the oil production tubing and the eccentric hole 18 of the water-mixed tubing respectively. The eccentric hole corresponding to the eccentric hole 23 of the tubing is connected to the production tubing 2 , and the eccentric hole corresponding to the eccentric hole 18 of the tubing mixed with water is connected to the tubing 4 mixed with water. The wellhead double-port flange device 3 is connected with the large four-way connection of the wellhead oil well casi...

Embodiment 3

[0036] refer to figure 1 , image 3 and Figure 5 , this embodiment is based on embodiment 2, the difference is:

[0037] In order to take out the water-mixed oil pipe 4 conveniently, the water-mixed oil pipe 4 of this embodiment is connected with the upper orifice of the eccentric hole 18 of the water-mixed oil pipe through an insertion device. There is a positioning lock spring 16, and the water-doped oil pipe joint 7 is connected with the water-doped oil pipe 4. The positioning lock spring 16 is located inside the eccentric hole 18 of the water-doped oil pipe and is clamped with the eccentric hole 18 of the water-doped oil pipe.

[0038] In order to accurately find and enter the eccentric hole 18 of the water-mixed oil pipe when lowering the insertion device, the upper end surface of the body 17 is an upward-opening leading cone with the eccentric hole 18 of the water-mixed oil pipe as the axis, such as Figure 5 As shown, when the insertion device is lowered to the main...

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Abstract

The invention discloses a high solidifying point crude oil exploiting device and a high solidifying point crude oil exploiting method, belonging to the field of oil exploitation. The device comprises an oil-well pump; an oil extracting tube is connected with the upper end of the oil-well pump; the oil extracting tube is formed by connecting single oil tubes; a dual-tube water blending device is arranged between any two single oil tubes under a wax point; the dual-tube water blending device comprises a main body; the main body is provided with an oil extracting tube eccentric hole and a water blending oil tube eccentric hole; the oil extracting tube eccentric hole is communicated with the water blending oil tube eccentric hole; an upper orifice and a lower orifice of the oil extracting tube eccentric hole are respectively connected with the two single oil tubes; the upper orifice of the water blending oil tube eccentric hole is connected with a water blending oil tube, and the lower orifice of the water blending oil tube is sealed. According to the high solidifying point crude oil exploiting device and the high solidifying point crude oil exploiting method, the energy consumption is greatly reduced so as to reduce oil exploiting cost by utilizing heat tracing of hot water for transporting the crude oil of a multi-purpose station.

Description

technical field [0001] The invention relates to the field of petroleum exploitation, in particular to the technology of lifting and mixing heat in oil wells in oil fields. Background technique [0002] With the development of the petroleum industry, the proportion of highly poured crude oil in the total petroleum production is increasing day by day. Due to the high wax content and high freezing point of high-condensation crude oil, during the process of mining, lifting and transportation, the temperature of the produced liquid continues to drop due to heat loss along the way, the condensation viscosity of crude oil increases sharply, and the flow resistance increases or even fails to flow. This kind of crude oil is generally lifted and transported by heating at home and abroad. [0003] At present, there are mainly two heating methods for high-condensation crude oil: one is the method of heating the hollow rod cable hot wire on the pump to reduce the condensation method, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/24
Inventor 徐兆强刘秀兰李鸿程王立军姜伟马占军唐晓波付光勇马闻天刘涛靳建光吴小艳赵雅丽杨俊李松邓斌
Owner PETROCHINA CO LTD
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