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Drilling fluid lubricating agent

A lubricant and drilling fluid technology, which is applied in the field of drilling fluid lubricants, can solve problems such as poor lubrication performance, and achieve the effects of reducing friction resistance, friction coefficient, rotation torque and tripping resistance

Active Publication Date: 2009-07-22
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is the poor lubricating performance of drilling fluid lubricants in the prior art in high-density drilling fluids, and a new drilling fluid lubricant is provided

Method used

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  • Drilling fluid lubricating agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～15

[0020] Pump the base oil into the blending kettle, turn on the agitator and the heating switch, add each component in turn when the oil is heated to 40°C, and keep stirring at 40°C for 2 hours to obtain a yellow-brown transparent liquid. The components and their contents in the drilling fluid lubricant are shown in Table 1. in FIG. 1,

[0021] Emulgen M, fatty alcohol polyoxyethylene ether, Clariant company MOA-7, polyoxyethylene fatty alcohol ether, Zhejiang Huangma Chemical Co., Ltd.

[0022] MOA-5, polyoxyethylene fatty alcohol ether, Zhejiang Huangma Chemical Company MOA-3, polyoxyethylene fatty alcohol ether, Zhejiang Huangma Chemical Company

[0023] T501: 2,6-di-tert-butyl-p-cresol T502: 2,6-di-tert-butylphenol

[0024] T531: N-Phenyl-α-Naphthylamine NP-10, Nonylphenol Polyoxyethylene Ether 10, Xingtai Auxiliary Factory

[0025] OP-10, polyoxyethylene 2-octylphenol ether-10, Lvshun Chemical Factory COA 070, fatty acid polyoxyethylene ether, Clariant company

[0026] ...

Embodiment 16

[0028] The prepared density is 2.4 g / cm 3 The drilling fluid base slurry was added into the drilling fluid lubricant prepared in [Example 1] according to different concentrations, and its friction coefficient and adhesion coefficient were measured. The results are shown in Table 2.

[0029] Table 2

[0030] Concentration % by weight 0 0.1 0.5 1.0 2.0 3.0 coefficient of friction 0.31 0.29 0.28 0.22 0.20 0.19 Adhesion coefficient 0.25 0.22 0.20 0.12 0.10 0.09

[0031] It can be seen from Table 2 that the addition of drilling fluid lubricant can significantly reduce the friction coefficient and adhesion coefficient of drilling fluid, and effectively improve the lubrication performance of drilling fluid.

experiment example 17

[0033] The drilling fluid lubricant prepared in [Example 1~15] is added successively to a density of 2.4 g / cm 3 In the drilling fluid base slurry, the weight percent concentration added is 1%.

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Abstract

The invention relates to a lubricant for drilling fluid, which essentially solves the problems of the prior art that the lubricant for drilling fluid has poor lubricating property in the high-density drilling fluid. The lubricant for drilling fluid comprises the following components calculating by weight percentage: a) 1 to 35 percent of long-chain organic acid oiliness agent; b) 1 to 35 percent of synthetic ester oiliness agent; c) 0.1 to 8 percent of emulsifier; and d) 25 to 90 percent of base oil; in which the synthetic ester oiliness agent is selected from at least one of isooctyl stearate, butyl isostearate, trimethylolpropane trioleate, trimethylolpropane palm kernel ester, trimethylolpropane ethylhexoate, neopentyl glycol oleate, methyl laurate or pentaerythritol caproate, therefore, the technical proposal solves the problem preferably, and can be used in the industrial production of lubricant for drilling fluid.

Description

technical field [0001] The invention relates to a drilling fluid lubricant, in particular to a high-density drilling fluid lubricant used in the drilling process of deep wells, ultra-deep wells, highly deviated wells, horizontal wells and slave wells. Background technique [0002] With the deepening of exploration and development of oil and gas fields at home and abroad, the number of deep wells and ultra-deep wells has been increasing. Deep wells and ultra-deep wells not only have deep buried oil layers and complex formations encountered, but also have high downhole temperature and pressure, and long operation periods, which are prone to complex situations such as blowout, well collapse, and lost circulation. In order to ensure safe and smooth drilling and production, deep and ultra-deep well drilling fluids generally use high-density and high-solid-content mud, and such high-density mud will have a negative impact on the regulation and maintenance of drilling fluid rheolog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/035
Inventor 冯军勇傅树琴朱明谢伟曾拥军
Owner CHINA PETROLEUM & CHEM CORP
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