Paraffin removal technological method by washing oil wells with hot steam

A process method and steam technology, which can be used in cleaning appliances, earth-moving drilling, wellbore/well components, etc., can solve the problems of affecting production, waste of energy, low thermal efficiency, etc., and achieve the effect of saving fuel oil, reducing pollution and high thermal efficiency

Inactive Publication Date: 2010-04-28
RENQIU NORTH CHINA OILFIELD RELIANCE IND
View PDF3 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method requires 20-30 cubic meters of water, which consumes a lot of water. After heating the water and injecting it into the oil well, it will not only pollute the oil layer, but also cause the well to be killed. When the oil well is in production, it will take several days to discharge it, affecting yield, waste
This kind of heating furnace uses the flame to directly heat the furnace tube, the thermal efficiency is low, and the fuel it uses is diesel oil, so the consumption of diesel oil is relatively large, which not only wastes energy, but also pollutes the air
In addition, if the method of heating the output fluid of the oil well to re-inject the ring

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0007] 1. Well number: Well Bai 1406. This oil well has been in continuous production for 4 months. It is known from the dynamometer diagram that the load of the pumping unit increases and the production of the oil well decreases. The oil production engineer decides that the oil well needs to be thermally washed to remove wax.

[0008] Relevant parameters of the well: wax melting point: 40°C, casing pressure: 0.1-0.4MPa, daily liquid production: 1 cubic meter, oil-gas ratio: 1:5, dynamic liquid level depth: 1450 meters, pump depth: 1570 meters.

[0009] The daily liquid production of this well is only 1 cubic meter, which is lower than 8 cubic meters, so the steam hot washing method is adopted. Heat pipe heating furnace (patented technology ZL200520121833.X or ZL200720151739.8) is used. Because the well produces associated gas, it can be used as fuel. Install the gas extractor on the casing of the oil well (the gas extractor can adopt the patented technology ZL99258117.6), con...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a paraffin removal technological method by washing oil wells with hot steam, which relates to an oil wells operation technological method. The method is mainly characterized in that softened water is heated to steam by using a hot pipe heating furnace, the steam temperature is kept to 120 DEG C-160 DEG C, the steam pressure is larger than the pressure of an oil well casing, the steam is introduced into an oil well from the oil well casing and is discharged from an oil pipe, and after 8-12 hours, the paraffin removal of the oil pipe can be finished. The method has the advantages that the problem of paraffin removal of oil wells with low yield or thick oil wells can be solved, oil wells with serious paraffin deposition and oil wells with severse oil pipe plugging of more than 60% can be washed, the method has no influence on crude oil production of the oil wells and no pollution to the oil reservoir, the safe production can be performed, and the method has high thermal efficiency, saves fuel oil and reduces the pollution. The method is suitable for oil wells with the daily yield of less than 8 cubic meters or oil wells with the crude oil viscosity of more than 10000 centipoises.

Description

technical field [0001] The invention relates to a process method for oil well operation. Background technique [0002] During the crude oil production process, the wax contained in the crude oil will continue to precipitate and condense on the oil pipe wall. After a long time, the oil pipe will be blocked. Therefore, after a period of time, the wax removal work should be carried out. At present, there are many wax removal methods in the oil production site, such as the wax removal method of installing a wax scraper on the sucker rod. This method is a mechanical wax removal method. The wax removal is not complete, and the removed wax is still in the crude oil. , it is still possible to clog the pipeline. There is also a method of chemical wax removal, that is, adding a wax remover to the oil well. After practical application, the wax removal effect of this method is not very good. If the method of gradually adding chemicals to the well at the wellhead, it will flow out with ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): E21B37/00E21B36/02
Inventor 张志文
Owner RENQIU NORTH CHINA OILFIELD RELIANCE IND
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap