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A kind of cleaning lubricating quick-drilling agent and preparation method thereof

A cleaning and wetting agent technology, applied in the field of cleaning, lubricating and fast drilling agents and their preparation, can solve the problems of large rheological influence of drilling fluid system, low density and temperature requirements, poor temperature resistance of treatment agents, etc., and achieve compatibility Good, low surface tension, strong wettability effect

Active Publication Date: 2017-04-26
CHINA PETROCHEMICAL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above fast drilling agents or fast drilling agents still have the disadvantage of low comprehensive performance, which has a great impact on the rheology of the drilling fluid system; the field application wells are generally about 3000m, and the requirements for density and temperature are low, and the treatment agent is resistant to temperature. Poor performance, can not meet high density (1.6g / cm 3 Keep the wellbore clean in the above) environment, and greatly increase the speed requirement; it is easy to foam after adding drilling fluid, especially under high temperature conditions; the manufacturing monomer is mainly derived from mineral oil, and mineral oil lubricates The agent cannot be biodegraded, causing great pollution to the environment, and its high fluorescence level affects geological logging

Method used

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  • A kind of cleaning lubricating quick-drilling agent and preparation method thereof
  • A kind of cleaning lubricating quick-drilling agent and preparation method thereof
  • A kind of cleaning lubricating quick-drilling agent and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Put 480g of waste animal and vegetable oil into a three-necked flask, then add 28.8g of catalyst DS, 33.6g of triethanolamine, heat to 135°C and fully react for 5 hours, stop heating, then add 489g of industrial grade fatty acid triglycerides into the three-necked flask , after stirring evenly, gradually add 28.8g polymeric alcohol, 19g octylphenol polyoxyethylene ether, 12.2g dioctyl sulfosuccinate sodium salt and 12.2g emulsifier SP-80, stir for 30 minutes to fully react, and obtain Cleaning and lubricating fast drilling agent.

[0044] Among them, the calculation formula of lubrication coefficient reduction rate is:

[0045]

[0046] Where: △k f - Lubrication coefficient reduction rate, %; k f1 - the lubrication coefficient of the base slurry;

[0047] k f2 ——The lubrication coefficient of base slurry after sample addition.

[0048] The foaming rate calculation formula is:

[0049]

[0050] In the formula: A' - the corrected foaming rate, %;

[0051] V ...

Embodiment 2

[0064] Put 480 tons of waste animal and vegetable oil into the reactor, then add 28.8 tons of catalyst DS, 33.6 tons of triethanolamine, heat to 135°C and react for 5 hours, then stop heating, and then add 489 tons of industrial grade fatty acid glycerin into the reactor After the triester is stirred evenly, gradually add 28.8 tons of polymer alcohol, 19 tons of octylphenol polyoxyethylene (10) ether, 12.2 tons of alkylphenol polyoxyethylene ether and 12.2 tons of emulsifier SP-80, and stir for 30 minutes to fully react , to prepare a cleaning and lubricating quick-drilling agent.

[0065] test 4

[0066] Containing 10% sodium chloride distilled water to prepare 6% Xinjiang evaluation with sodium soil base slurry, test the extrusion lubrication coefficient of Xinjiang evaluation with sodium soil base slurry with EP test; Then clean and lubricate described in embodiment 2 Add 4g of the drilling agent sample to 400mL of the sodium soil base slurry for evaluation in Xinjiang, st...

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Abstract

The invention discloses a cleaning and lubricating fast drilling agent and a preparation method thereof. The cleaning and lubricating fast drilling agent comprises the following components in part by weight: 70-90 parts of waste grease, 2-7 parts of a fast penetrating agent, 2-5 parts of an emulsifying agent, 3-8 parts of a catalyst, 3-7 parts of a wetting agent and 5-9 parts of a surfactant. With the waste grease as a raw material, the prepared cleaning and lubricating fast drilling agent is good in compatibility, high in temperature resistance and wettability and low in surface tension, so that bit balling is effectively prevented; the cleaning and lubricating fast drilling agent is good in lubricating effect, strong in inhibition, resistant to salt and rock debris pollution, good in reservoir protection, environment-friendly, and extremely low in foaming rate before and after high temperature; the preparation method is simple in process and relatively low in cost; by the preparation method, key technical problems of deep well drilling and ultradeep well under complex geological conditions are solved; the cleaning and lubricating fast drilling agent protects an oil and gas reservoir, reduces drilling accidents, increases the drilling speed overall and reduces the drilling cost.

Description

technical field [0001] The invention relates to a fast drilling agent in the field of oil and gas well engineering, in particular to a cleaning and lubricating fast drilling agent and a preparation method thereof. Background technique [0002] With the continuous development of the field of oil and gas exploration and development, the formations encountered in the drilling process are becoming more and more complex, and the wells are getting deeper and deeper. The complex situation downhole is even more unpredictable, and the difficulty of handling has increased significantly. Under the condition of high pressure in deep wells, the drill bit often encounters mud shale, soft shale, sticky shale and expansive shale in hard formations. Such formations are easy to hydrate and expand and cause complex accidents downhole. In shale well sections, the problem of wellbore instability is particularly prominent. Especially the drilling fluid density is greater than 1.60g / cm 3 Above, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/035
CPCC09K8/035C09K2208/34
Inventor 王宝田杨倩云柴金鹏张海青何兴华袁丽郭辉杨世超
Owner CHINA PETROCHEMICAL CORP
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