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Controlled-release dosing device and oil field water injection well opening tail end unpowered controlled-release sterilizing method

A dosing device and slow-release technology, which is applied in the field of slow-release dosing devices, can solve problems such as inability to continuously dosing, injection water quality not up to standard, etc.

Pending Publication Date: 2019-03-01
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a slow-release dosing device and a non-powered slow-release sterilization method at the end of the oilfield water injection wellhead, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem that the conventional water injection system of the water injection well easily causes the water quality of the injection water to fail to meet the standard. The problem of continuous dosing under medium and high pressure conditions

Method used

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  • Controlled-release dosing device and oil field water injection well opening tail end unpowered controlled-release sterilizing method
  • Controlled-release dosing device and oil field water injection well opening tail end unpowered controlled-release sterilizing method
  • Controlled-release dosing device and oil field water injection well opening tail end unpowered controlled-release sterilizing method

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Experimental program
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Effect test

Embodiment 1

[0021] Embodiment 1: as attached Figures 1 to 3 As shown, the slow-release dosing device includes a drug storage cylinder 1 closed all around, and a drug addition cylinder 2 with an outer diameter smaller than the inner diameter of the drug storage cylinder 1 and closed around it is fixed in the drug storage cylinder 1. A water outlet is provided on the wall of the drug storage cylinder 1 above the drug cylinder 2, and a water inlet corresponding to the lower part of the drug addition cylinder 2 is provided on the wall of the drug storage cylinder 1 opposite to the water outlet; Through holes are distributed on the cylinder wall and the top surface of the cylinder body 2 .

[0022] Usually, the water inlet short-circuit 3 is set at the water inlet, and the water outlet short-circuit 4 is set at the water outlet. The through hole here is used as a water inlet hole and a medicine outlet hole.

[0023] When the slow-release dosing device is used, it is directly connected in se...

Embodiment 2

[0037] Embodiment 2: as attached figure 1 As shown, the slow-release dosing device described in the above-mentioned embodiment is used to carry out the unpowered slow-release sterilization method at the end of the oilfield water injection wellhead, and it is carried out as follows: bromochlorhydantoin capsules are housed in the dosing cylinder body 2, and the bromine-chlorhydantoin capsules will be housed. The dosing cylinder 2 of the chlorhydantoin capsule is fixed in the medicine storage cylinder 1, and the medicine storage cylinder 1 is connected in series to the water injection pipeline of the water injection well through the water inlet pipeline 5 and the water outlet pipeline 6, and the injected water in the water injection pipeline of the water injection well Enter the drug storage cylinder 1 through the water inlet, and the injection water in the drug storage cylinder 1 forms a high-pressure swirl on the outer wall of the dosing cylinder 2, and continuously impacts and ...

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Abstract

The invention relates to the technical field of oil field injected water sterilization, in particular to a controlled-release dosing device and an oil field water injection well opening tail end unpowered controlled-release sterilizing method. The controlled-release dosing device comprises an agent storage barrel of which the periphery is enclosed, wherein a dosing barrel of which the outer diameter is less than the inner diameter of the agent storage barrel, and the periphery is enclosed is fixed in the agent storage barrel; the barrel wall of the agent storage barrel above the dosing barrelis provided with a water outlet; the barrel wall of the agent storage barrel opposite to the water outlet is provided with a water inlet corresponding to the lower part of the dosing barrel; through holes are distributed in the barrel wall and the top side of the dosing barrel. By adopting the oil field water injection well opening tail end unpowered controlled-release sterilizing method, the release amount of 1-bromo-3-chloro-5,5-dimethylhydantoin capsules can be controlled, external dosing power is not required, the function of slowly releasing dosing under a high pressure condition is realized, and the concentration range value of a controlled-release sterilizing agent for the injected water can meet the production requirement in a constant time period, so that the bacteria index at thewell opening can be controlled, and aim of controlling the bacteria index at the well opening within a standard range is fulfilled.

Description

technical field [0001] The invention relates to the technical field of oilfield injection water sterilization, and relates to a slow-release dosing device and an unpowered slow-release sterilization method at the end of an oilfield water injection wellhead. Background technique [0002] Oilfield water injection is an important measure in the process of oilfield exploitation, and the temperature of water injection and the environmental conditions of the injection process are suitable for the growth and reproduction of various bacteria including aerobic bacteria and anaerobic bacteria. The growth and reproduction of fungi can intensify the corrosion of production pipelines and equipment. Corrosion products, bacteria and their metabolites can easily block the formation and damage the permeability of the oil layer. The quality of the injection water directly affects the length of the production cycle and the cost. More than 50% of the corrosion in oilfield production is caused b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/50C02F103/10
CPCC02F1/50C02F2103/10
Inventor 付蕾刘建超王爱军杨萍萍郑帅王一军卜魁勇颜亨兵
Owner BC P INC CHINA NAT PETROLEUM CORP
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