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Method for preparing polyepichlorohydrin-diethanol amine anti-collapse inhibitor in laboratory

A polyepichlorohydrin and epichlorohydrin technology, which is applied in the field of petroleum drilling fluids, can solve the problems of difficult control of system rheology, complicated preparation process, and difficulty in meeting the needs of shale drilling wellbore stability.

Inactive Publication Date: 2012-06-20
CNPC BOHAI DRILLING ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Each of these anti-slump inhibitors has some shortcomings: asphalt is not conducive to environmental protection; silicates will make it difficult to control the rheology of the system; glycosides and polyethylene glycols cannot solve the drilling problem of active mud shale; Due to the complex preparation process and high cost of the amine-based inhibitors developed in the past, a mature production process has not yet been formed in China, and there is a lack of a simple preparation method for the production process, which is difficult to meet the needs of shale drilling for wellbore stability

Method used

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  • Method for preparing polyepichlorohydrin-diethanol amine anti-collapse inhibitor in laboratory
  • Method for preparing polyepichlorohydrin-diethanol amine anti-collapse inhibitor in laboratory

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Laboratory preparation of polyepichlorohydrin-diethanolamine anti-slump inhibitor

[0040] Preparation of raw material chemicals in the first step

[0041] According to the number of parts by volume, each part should not be less than 1mL, and the preparation is as follows:

[0042] 10 parts of water;

[0043] 20 parts of epichlorohydrin;

[0044] 20 parts of diethanolamine;

[0045] The second step is a low temperature water bath

[0046] In a 150mL three-necked flask, each mouth of the three-necked flask is used to place a thermometer, agitator and add raw material chemicals respectively. Take 10mL of water and add it to the three-necked flask, and place the three-necked flask in an ice-water bath to control its temperature at 25 Below ℃;

[0047] The third step is to add diethanolamine

[0048] Add 20mL of diethanolamine to the three-necked flask required by the previous step, and stir for 10 minutes until the diethanolamine and water are completely mixed and un...

Embodiment 2

[0055] Example 2: Laboratory preparation of polyepichlorohydrin-diethanolamine anti-slump inhibitor

[0056] Preparation of raw material chemicals in the first step

[0057] According to the number of parts by volume, each part should not be less than 1mL, and the preparation is as follows:

[0058] 20 parts of water;

[0059] 30 parts of epichlorohydrin;

[0060] 30 parts of diethanolamine;

[0061] The second step is a low temperature water bath

[0062] In a 150mL three-necked flask, each mouth of the three-necked flask is used to place a thermometer, a stirrer and add raw materials, respectively. Take 20mL of water and add it to the three-necked flask. Below ℃;

[0063] The third step is to add diethanolamine

[0064]Add 30mL of diethanolamine to the three-necked flask required by the previous step, and stir for 10 minutes until the diethanolamine and water are completely mixed and homogenous. During this period, keep a low-temperature water bath to keep the temperat...

Embodiment 3

[0071] Example 3: Laboratory preparation of polyepichlorohydrin-diethanolamine anti-slump inhibitor

[0072] Preparation of raw material chemicals in the first step

[0073] According to the number of parts by volume, each part should not be less than 1mL, and the preparation is as follows:

[0074] 10 parts of water;

[0075] 20 parts of epichlorohydrin;

[0076] 20 parts of diethanolamine;

[0077] The second step is a low temperature water bath

[0078] In a 150mL three-necked flask, each mouth of the three-necked flask is used to place a thermometer, a stirrer and add raw materials, respectively. Take 10mL of water and add it to the three-necked flask. Below ℃;

[0079] The third step is to add diethanolamine

[0080] Add 20mL of diethanolamine to the three-necked flask required by the previous step, and stir for 10 minutes until the diethanolamine and water are completely mixed and homogenous. During this period, keep a low-temperature water bath to keep the tempera...

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Abstract

The invention discloses a method for preparing a polyepichlorohydrin-diethanol amine anti-collapse inhibitor in a laboratory. The method comprises the following main steps of: adding 10-30 parts of diethanol amine into 10-20 parts of water in volume; after uniformly mixing, slowly dropping 10-30 parts of epoxy chloropropane while stirring; and then stirring at 30-60 DEG C and reacting at constant temperature for 2-5 h so as to obtain colourless or faint yellow sticky liquid, namely an anti-collapse inhibitor product. The inhibitor has high positive charge density, contains a lot of hydroxyls and is capable of entering intercalated clay or being adsorbed on the surface of the intercalated clay; electric double-layer thicknesses of clay particles can be compressed through electrical neutralization action, so that clay hydration expansion can be effectively inhibited; and the inhibitor has a steady property and good compatibility with the common drilling fluid additive and can be widely applied to the drilling fluid systems, such as polymers, cationic sol, solid-free phases and the like.

Description

technical field [0001] The invention relates to a laboratory preparation method of a polyepichlorohydrin-diethanolamine anti-slump inhibitor. The inhibitor is mainly used as a treatment agent for water-based drilling fluid and belongs to the technical field of petroleum drilling fluid. Background technique [0002] Well wall collapse is a major problem in drilling engineering. Anti-slump inhibitors are the core of improving drilling fluid performance and improving wellbore stability. At present, the commonly used mud shale anti-slump inhibitors for drilling fluid mainly include asphalt, polymers and inorganic salts. Each of these anti-slump inhibitors has some shortcomings: asphalt is not conducive to environmental protection; silicates will make it difficult to control the rheology of the system; glycosides and polyethylene glycols cannot solve the drilling problem of active mud shale; Due to the complicated preparation process and high cost of the amine-based inhibitors ...

Claims

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Application Information

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IPC IPC(8): C08G73/00C09K8/035
Inventor 郭明红左凤江贾东民田野虞海法李秀妹
Owner CNPC BOHAI DRILLING ENG
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