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Oil well blockage removing pipe free agent and preparation thereof

A jam-releasing agent and technology for oil wells, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as inconvenience in production management, and achieve the effects of eliminating well jamming accidents and reducing oil well pump inspection costs.

Active Publication Date: 2008-12-24
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has caused great inconvenience to production management

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: The weight ratio of each component of oil well plugging and unblocking agent is:

[0035] 1. Nonylphenol polyoxyethylene ether NPD-100 (industrial product): 7%;

[0036] 2. Nonylphenol polyoxyethylene ether NPD-200 (industrial product); 13%;

[0037] 3. Hydrochloric acid (industrial product): 3.1%

[0038] 4. Methanol: 22.5%;

[0039] 5. INTECHEM-02 fluorocarbon surfactant (industrial product): 0.12%;

[0040] 6. The rest is water, and the sum of the weight percentages of each component is 100%.

[0041] The preparation process of oil well plugging and unblocking agent:

[0042] First, five raw materials including nonylphenol polyoxyethylene ether NPD-100, nonylphenol polyoxyethylene ether NPD-200, hydrochloric acid, methanol, and INTECHEM-02 fluorocarbon surfactant were added in proportion to the atmospheric pressure enamel reaction kettle. Slowly raise the temperature to 50-66°C.

[0043] Second, after 30 minutes of constant stirring, the heating w...

Embodiment 2～5

[0045] The percentage by weight of each component of embodiment 2~5 oil well plugging and jam-removing agent is:

[0046] component name

Example 2

Example 3

Example 4

Example 5

Nonylphenol polyoxyethylene ether

NPD-100

6.2

7.1

7.5

8

Nonylphenol polyoxyethylene ether

NPD-200

13

13.5

12

14.8

hydrochloric acid

2.3

3.5

2.8

3.4

Methanol

22

21

24

24.6

INTECHEM-02

Fluorocarbon Surfactant

0.08

0.12

0.2

0.14

water

the remaining

the remaining

the remaining

the remaining

[0047] For Examples 2-5, the sum of the weight percentages of each component is 100% for oil well plugging and jam-removing agents, and the preparation process is the same as that of Example 1.

[0048] The present invention has been tested in more than 30...

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PUM

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Abstract

An oil well blockage relieving and well freeing agent is applied to avoid well blockage accidents caused by accumulated dirt. The agent is characterized in that: the agent comprises the following compositions in weight percentage: a. 5.5 to 8 percent of polyoxyethylene nonyl phenyl ether NPD-100; b. 10 to 15 percent of polyoxyethylene nonyl phenyl ether NPD-200; c. 2.0 to 3.5 percent of hydrochloric acid; d. 20 to 25 percent of methanol; e. 0.05 to 0.2 percent of INTECHEM-02 fluorocarbon surfactant; and f. the balancing being water. The oil well blockage relieving and well freeing agent has the advantages that: a blockage relieving and well freeing agent aqueous solution of between 0.5 and 1 percent, which is applied to flush an oil well with a great displacement and can avoid the well blockage accidents caused by accumulated dirt, prolong a pump inspection cycle, and reduce oil well pump inspection cost and oil extraction cost.

Description

technical field [0001] The invention relates to the technical field of oilfield chemistry, in particular to an oil well plugging and jam-removing agent, which is used for eliminating well jamming accidents caused by scale deposition and reducing oil well pump inspection costs. Background technique [0002] After the oil field entered the medium-high water cut period, some oil wells had severe scaling. Although the scaling was alleviated by adding antiscalants in the oil wells, when a power failure occurred, a part of the scaling was deposited on the oil well pump, often causing well jamming accidents. The oil wells that caused the stuck well accident can only resume normal oil production by checking the pump. It has caused great inconvenience to production management. Contents of the invention [0003] The object of the present invention is to provide an oil well plugging and jam-removing agent and a preparation method thereof, which uses 0.5% to 1% oil well plugging and ...

Claims

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Application Information

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IPC IPC(8): C09K8/78
Inventor 付亚荣周晓俊田炜蔡远红吴泽美李冬青吕德福孙学峰郝玉军蒲祥金常洪付丽霞郑征黎运强
Owner PETROCHINA CO LTD
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