Unlock instant, AI-driven research and patent intelligence for your innovation.

Automatic filling device of oil soluble chemical agent and filling method thereof

An automatic injection and chemical agent technology, applied in earthwork drilling, cleaning equipment, wellbore/well parts, etc., can solve the problems of short dosing cycle, untimely dosing, low efficiency, etc., and achieve stable dosing concentration , Easy operation and maintenance

Pending Publication Date: 2020-04-17
PETROCHINA CO LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) The annulus is isolated from the production well, and the gas-oil ratio of the oil well is high, and the annulus of the pharmaceutical oil sleeve cannot be injected or the injection is difficult, and the efficiency is low, time-consuming, labor-intensive, and expensive;
[0006] (2) Dosing in remote wells is labor-intensive, and dosing is not timely;
[0007] (3) The dissolution of solid chemical agents in the well fluid is greatly affected by the well temperature, the release rate of the agents cannot be effectively controlled, and the concentration of the effective agents is not uniform;
[0008] (4) Downhole drip dosing is affected by high temperature and high pressure, corrosion and scaling at the bottom of the well, so it is easily damaged, the dosing amount cannot be effectively controlled, the dosing cycle is short, and the cost is high

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Automatic filling device of oil soluble chemical agent and filling method thereof
  • Automatic filling device of oil soluble chemical agent and filling method thereof
  • Automatic filling device of oil soluble chemical agent and filling method thereof

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0045] The first embodiment of the present invention relates to an automatic filling device for an oil-soluble chemical agent, comprising a dosing device 1 and a medicine storage device 2 arranged up and down, referring to figure 1 , the dosing device 1 includes a dosing cylinder 3 penetrating up and down, and a limiting circular plate 6 is sealed in the radial direction in the dosing cylinder 3, and at least one liquid inlet pipe 4 and at least one liquid inlet pipe 4 are vertically passed through the limiting circular plate 6 A liquid outlet pipe 5, the liquid inlet pipe 4 is a one-way fluid channel that enters from the top and exits from the bottom, and is hydrophilic and oil-repellent, and the liquid outlet pipe 5 is a one-way fluid channel that enters from the bottom and exits from the top, and is lipophilic and hydrophobic;

[0046] refer to figure 2 , the drug storage device 2 includes a drug storage tube 7 that penetrates up and down and is sealingly connected with th...

no. 2 approach

[0058] On the basis of the first embodiment, such as image 3 As shown, the structure of the liquid inlet pipe 4 and the liquid outlet pipe 5 is the same, at least including the outer pipe 9, the inner cavity of the outer pipe 9 is sealed and fixed to a supporting circular plate 10 along its radial direction, and vertically passing through the supporting circular plate 10 is provided with Several capillaries 11.

[0059] Capillarity (or capillary action): When an object containing tiny gaps is in contact with a liquid, the liquid rises or infiltrates along the gap in the case of wetting, and the liquid descends along the gap in the case of non-wetting; in the case of wetting, the gap The thinner it is, the higher the liquid rises, which means that the liquid inside the thin tubular object overcomes the gravity and rises due to the difference in cohesion and adhesion.

[0060] The above is the definition of capillary action. This embodiment mainly utilizes the combination of c...

no. 3 approach

[0072] On the basis of the second embodiment, preferably, the length of the capillary 11 is equal to the length of the outer tube 9, the upper nozzle of the liquid inlet pipe 4 is flush with the upper nozzle of the liquid outlet pipe 5, and the lower nozzle of the liquid inlet pipe 4 The nozzle is located below the lower nozzle of the outlet pipe 5, and the above is an optimization improvement made in consideration of the capillary phenomenon.

[0073] Since the composition of the formation water is not only water, but also other impurities, in order to prevent other impurities from entering the liquid inlet pipe 4 and causing blockage of the inner cavity of the pipe, similarly, it is inevitable that the liquid outlet pipe 5 will be soaked in oil-soluble chemicals or formation water for a long time. It will be blocked by impurities. In order to solve the above problems, filter screens are installed on the upper and lower nozzles of the liquid inlet pipe 4 and the upper and lowe...

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 relates to an automatic filling device of an oil soluble chemical agent and a filling method thereof. The automatic filling device is hung on the lower end of a sieve tube and is mainlycomposed of a medicine adding device and a medicine storage device, wherein the medicine adding device comprises a liquid inlet tube and a liquid outlet tube, the liquid inlet tube is hydrophilic andhydrophobic, formation water in a wellhole is sucked into the medicine adding device through capillarity and flows to the bottom end of a medicine storage barrel through the medicine storage device, the liquid outlet tube is hydrophilic and hydrophobic, and the oil soluble chemical agent is conveyed into the wellhole through capillarity. Continuous material exchange between the external formationwater and the internal oil soluble chemical agent is performed, and the oil soluble chemical agent continuously enters an oil well under the combined action of capillary force due to oil and water immiscibility caused by large specific gravity of the formation water. The automatic filling device is suitable for filling the oil soluble chemical agent such as an oil soluble rust inhibitor and a paraffin remover, automatic continuous filling is realized without external force, the filling concentration is stable, the filling cycle is greater than one year, and the operation and maintenance are convenient.

Description

technical field [0001] The invention belongs to the field of filling equipment for oil and gas fields, in particular to an automatic filling device for oil-soluble chemical agents and a filling method thereof, and is particularly suitable for filling oil-soluble chemical corrosion inhibitors and wax removers for pipe strings in oil and gas fields. Background technique [0002] In the process of oil and gas well development, due to the needs of wellbore anticorrosion, scale prevention and wax prevention, adding chemical agents to oil production wellbore is an important measure to maintain the normal production of oil wells, and it is also the main means to prolong the repair-free period of oil wells. According to different diluting solvents, it can be roughly divided into three types: oil-soluble, water-soluble and mixed-soluble, among which oil-soluble chemicals are the most commonly used. [0003] The oil-soluble chemical agent is to dissolve the functional main agent into ...

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): E21B41/02E21B37/06
CPCE21B37/06E21B41/02
Inventor 董晓焕姜毅李琼玮李明星朱方辉刘伟张振云于淑珍程碧海李慧
Owner PETROCHINA CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com