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Automatic reagent feeding method and device for oil well scale prevention

An automatic chemical dosing and oil well technology, which is applied in earthwork drilling, wellbore/well components, production fluids, etc., can solve problems such as many supporting equipment, heavy maintenance workload, and difficulty in ensuring time rate

Inactive Publication Date: 2015-05-13
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of traditional chemical dosing devices, such as large single-well chemical dosing workload, great influence by weather and well site conditions, difficulty in ensuring time rate, many supporting equipment, heavy maintenance workload, high cost and high labor intensity of workers, this project The invention proposes an automatic dosing method capable of self-detection and start-stop dosing and an automatic dosing system corresponding to the method. The specific technical scheme is as follows:

Method used

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  • Automatic reagent feeding method and device for oil well scale prevention
  • Automatic reagent feeding method and device for oil well scale prevention

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: an automatic dosing method for oil well scale prevention, the method specifically comprises the following steps:

[0028] Step 1: Store the anti-scaling agent in the metering room so that it can be used at any time;

[0029] Step 2: throwing the anti-scale agent stored in the metering room into the dosing channel, so as to flow to the wellhead through the dosing channel, and then enter the oil pipe;

[0030] Step 3: Open or close the dosing channel, after opening the dosing channel, the anti-scaling agent enters the dosing channel and flows to the wellhead, and closes the dosing channel so that the drug will not flow to the wellhead to avoid waste;

[0031] Step 4: Collect the conductivity information of the wellhead, and collect the information of the conductivity of the liquid in the dosing channel at the wellhead;

[0032] Step 5: Compare the conductivity collected in step 4 with the conductivity of water, so as to determine whether an anti-scaling age...

Embodiment 2

[0036] Embodiment 2: an automatic dosing system for oil well scale prevention corresponding to the above method, the system includes a medicine storage tank 1 storing an anti-scale agent in a metering room;

[0037] It also includes a plunger pump 2 for throwing the anti-scaling agent stored in the metering room into the dosing channel to provide power for the anti-scaling agent;

[0038] Open or close the electric valve 3 of the metering room for the drug delivery channel;

[0039] The drug detection device 4 that collects the conductivity information of the wellhead, judges whether to administer the drug through the conductivity;

[0040] Compare the collected conductivity with the conductivity of water, and then judge whether the controller 5 of the anti-scaling agent is put into the dosing channel at the wellhead;

[0041] Open or close the wellhead electric valve 6 of the dosing channel at the wellhead according to the result judged by the controller 5;

[0042] Wherein...

Embodiment 3

[0043] Embodiment 3: Further, in order to better reduce labor and improve automatic control, the plunger pump 2 and the electric valve 3 between metering are respectively connected with the controller 5, which enables the staff to control the opening or closing through the controller 5. Plunger pump 2 and control to open or close the electric valve 3 between metering.

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Abstract

The invention discloses an automatic reagent feeding method and system for oil well scale prevention. The problems that a traditional reagent feeding device is large in single-well reagent feeding workload, is greatly influenced by weather and well site conditions, cannot guarantee time rate easily, has multiple corollary devices, and is large in maintenance workload, high in cost and large in worker labor intensity can be solved. The system comprises a reagent storage tank with a metering room storing an antiscale agent, and further comprises a plunger pump, a metering room electric valve, a reagent detection device, a controller and a well mouth electric valve, wherein the plunger pump feeds the antiscale agent stored in the metering room into a reagent feeding channel, the metering room electric valve opens or closes the reagent feeding channel, the reagent detection device collects electric conductivity information of a well mouth, the controller compares the collected electric conductivity with electric conductivity of water and then judges whether the antiscale agent is fed into the reagent feeding channel at the well mouth or not, and the well mouth electric valve opens or closes the reagent feeding channel at the position of the well mouth according to the result judged by the controller. The system is high in efficiency, small in labor input, automatic and intelligent.

Description

technical field [0001] The invention belongs to the technical field of petroleum development, and relates to an oil well anti-scaling dosing device, in particular to an automatic dosing method and system for oil well anti-scaling. Background technique [0002] At present, in the oil field ASP flooding technology, the oil well anti-scaling process mainly adopts the wellhead liquid dosing device. The dosing device is equipped with a drug storage tank and a dosing pipeline, and the anti-scaling agent is injected into the oil well casing annulus through a dosing pump. Quantitative injection of anti-scaling agent, but this traditional dosing device has the disadvantages of large dosing workload in a single well, great influence by weather and well site conditions, difficulty in ensuring time rate, many supporting equipment, large maintenance workload, high cost and labor costs. Problems such as high labor intensity have affected the anti-scaling effect of anti-scalants to a cert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/22
CPCE21B43/16
Inventor 祝英俊任志刚孔令维赵昌明洪小平
Owner PETROCHINA CO LTD
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