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Polyamide amine flowing modifier for mineral oil based drilling fluid and preparation method of modifier

A technology of polyamidoamine and flow pattern regulator, which is applied in the field of drilling fluid to achieve the effects of saving energy consumption, enhancing interaction and reducing control difficulty

Active Publication Date: 2014-03-26
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] At present, domestic mineral oil-based drilling fluid technology is in the development stage, and there is a big gap compared with foreign countries

Method used

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  • Polyamide amine flowing modifier for mineral oil based drilling fluid and preparation method of modifier

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Experimental program
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Effect test

Embodiment 1

[0023] In a four-port reactor equipped with a stirrer, a thermometer, a nitrogen gas device (inert gas protection and carrying water vapor) and a Dean-Stark receiver, add diethylenetriamine according to the ratio of the number of amine groups to the number of carboxyl groups at 0.4:1.0 and dimer fatty acid (78wt% dimer acid, 10wt% monomeric acid and 12wt% trimer acid), heated to 110°C in a constant temperature oil bath for 0.5h, then heated to 150°C, and reacted for 3.0h to obtain the mineral Polyamidoamine flow pattern modifier for oil-based drilling fluids. The obtained mineral oil-based drilling fluid is mixed uniformly with the polyamidoamine flow pattern regulator and the solvent at a mass ratio of 1:1 to obtain the product PAA-1; wherein: the solvent is dipropylene glycol monomethyl ether with a mass ratio of 60:40 Mixture with 5# industrial white oil.

Embodiment 2

[0025] In a four-port reactor equipped with a stirrer, a thermometer, a nitrogen gas device (inert gas protection and carrying water vapor) and a Dean-Stark receiver, add triethylenetetramine according to the ratio of the number of amine groups to the number of carboxyl groups at 0.7:1.0 and dimer fatty acid (92wt% dimer acid, 2.5% monomeric acid and 5.5% trimer acid), heated to 110°C in a constant temperature oil bath for 0.5h, then heated to 160°C, and reacted for 2.0h to obtain the mineral Polyamidoamine flow pattern modifier for oil-based drilling fluids. The obtained mineral oil-based drilling fluid is mixed uniformly with the polyamidoamine flow pattern regulator and the solvent at a mass ratio of 1:1 to obtain the product PAA-2; wherein: the solvent is dipropylene glycol monomethyl ether with a mass ratio of 60:40 Mixture with 5# industrial white oil.

Embodiment 3

[0027] In a four-port reactor equipped with a stirrer, a thermometer, a nitrogen gas device (inert gas protection and carrying water vapor) and a Dean-Stark receiver, add triethylenetetramine at a ratio of 0.8:1.0 of the number of amine groups to the number of carboxyl groups and dimer fatty acid (98wt% dimer acid and 2wt% monomeric acid), heated to 110°C in a constant temperature oil bath for 0.5h, then heated up to 160°C, and reacted for 1.5h to obtain the polymer for mineral oil-based drilling fluid of the present invention. Amidoamine flow regulator. The obtained mineral oil-based drilling fluid is mixed uniformly with the polyamidoamine flow pattern regulator and the solvent at a mass ratio of 1:1 to obtain the product PAA-3; wherein: the solvent is dipropylene glycol monomethyl ether with a mass ratio of 60:40 Mixture with 5# industrial white oil.

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Abstract

The invention discloses a polyamide amine flowing modifier for mineral oil based drilling fluid and a preparation method of the modifier. The modifier is prepared in such way that dimer fatty acid and polybasic amine are subjected to amidation reaction at 120-160 DEG C and then a reaction product is homogeneously mixed with a solvent; the content of dimer in the dimer fatty acid is greater than 78wt%; the polybasic amine is a homolog of polyethylene polyamine containing 2-5 amido groups; the molar ratio of the carboxylic groups in the dimer fatty acid to the amido groups in the polybasic amine is 1 to (0.2-1.2). The preparation process is fulfilled in a reaction vessel connected with a Dean-Stark receiver. The polyamide amine flowing modifier has high molecular weight and multiple active functional groups, can form multi-point adsorption, is hard to desorb from the surface of organic soil, and is continuously effective and stable in performance at high temperature; the preparation process is simple and reaction conditions are easy to control.

Description

technical field [0001] The invention relates to a drilling fluid for oil and natural gas industry, in particular to a polyamidoamine flow pattern regulator for mineral oil-based drilling fluid and a preparation method thereof. Background technique [0002] With the development of modern drilling technology, oil-based drilling fluid has become the first choice for drilling in various complex formations due to its excellent properties such as good lubricity, strong inhibition, and little damage to formations. However, oil-based drilling fluids have poor suspensibility and may form cuttings beds. Therefore, the suspension capacity is one of the parameters that determine the performance of oil-based drilling fluids, which directly affects the wellbore purification effect, the settlement of heavy materials, the equivalent circulation density, pressure excitation and pumping. Suction pressure etc. Complex wells, especially deepwater wells, HPHT wells, and well sections with narro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/035
CPCC09K8/035C09K8/32
Inventor 张现斌黄达全王伟忠郭剑梅马运庆管恩翠张向明宋学文李振杰
Owner BC P INC CHINA NAT PETROLEUM CORP
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