Drilling fluid lubricant prepared from waste plant oil and preparation method thereof

A technology for discarding vegetable oils and lubricants, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of solid control equipment removal, poor cooling drilling performance, poor lubrication performance, etc., and achieve good economic and social benefits. , Conducive to environmental protection, excellent lubricating performance

Inactive Publication Date: 2015-02-25
CHINA PETROCHEMICAL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Disadvantages: (1) Due to the limitation of particle size, it is easy to be removed by solid control equipment;
[0010] (2) Under the extrusion or beating of the drill pipe, there is a possibility of damage and deformation;
[0011] (3) The performance of the cooling drill is poor, not suitable for use under high speed conditions
[0015] Disadvantages: Contains aromatics, low flash point, difficult to degrade, and there are environmental pollution and safety hazards in the process of production and use
[0019] Disadvantages: (1) It can only be used with oil products;
[0020] (2) Poor lubrication performance;
[0021] (3) Difficult to degrade, causing environmental pollution and potential safety hazards

Method used

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  • Drilling fluid lubricant prepared from waste plant oil and preparation method thereof
  • Drilling fluid lubricant prepared from waste plant oil and preparation method thereof
  • Drilling fluid lubricant prepared from waste plant oil and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Embodiment 1: the preparation method of vegetable oil drilling fluid lubricant of the present invention

[0055] (1) After the waste vegetable oil settles for 24 hours, centrifuge it with a centrifuge for 0.5 hours to remove impurities such as sediment and water;

[0056] (2) Take 800.0g of centrifuged waste vegetable oil, add 100.0g of methanol and 25.0g of catalyst p-toluenesulfonic acid, keep the temperature at 90°C, and react for 6h;

[0057] (3) After the product settles for 6 hours, separate the glycerin, and then carry out rectification at 100°C to remove unreacted methanol;

[0058] (4) Add 40g nonionic surfactant fatty acid sorbitol ( Pan 85) and 30g of sulfonated lignite resin to get it.

Embodiment 2

[0059] Embodiment 2: the method for measuring the lubricity of the vegetable oil drilling fluid lubricant of the present invention

[0060] Preparation of fresh water base slurry: Accurately measure 300mL of distilled water with a measuring cylinder, add accurately weighed 18.00g of sodium bentonite under high-speed stirring at 10,000RPM, stir at high speed for 20 minutes, keep it sealed at room temperature for 24 hours, and prepare 6% sodium bentonite slurry. Referred to as base pulp.

[0061] Preparation of 4% saline base slurry: Take 300mL base slurry, add 12.00gNaCl, stir at 10000RPM at high speed for 5min, and make 4% brine slurry, referred to as 4% brine base slurry.

Embodiment 2-1

[0062] Example 2-1: Lubrication performance test method at room temperature

[0063] Determination of extreme pressure lubrication performance of fresh water slurry: prepare two 300mL base slurries, add 1% of the developed vegetable oil drilling fluid lubricant to one of them, stir the two slurries at high speed at 10000RPM for 5min, and measure them with EP extreme pressure lubrication instrument The extreme pressure lubrication coefficient of base slurry before and after adding samples.

[0064] Determination of the adhesion coefficient of fresh water slurry: Prepare two 300mL base slurry, add 1% of the developed vegetable oil drilling fluid lubricant to one of them, and after stirring at 10000RPM for 5min at high speed, measure the base slurry with an adhesion coefficient tester. Adhesion coefficient before and after slurry addition.

[0065] Determination of extreme pressure lubrication performance of brine slurry: prepare two 300mL brine base slurries, add 1% of the deve...

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Abstract

The invention provides a drilling fluid lubricant prepared from waste plant oil and a preparation method thereof. The lubricant is composed of the following raw materials in parts by weight: 70 to 80 parts of waste plant oil, 10 to 20 pats of lower alcohols, 1 to 5 parts of surfactant, and 1 to 5 parts of high temperature resistant processing agent. The preparation method comprises the following steps: step a, carrying out a pretreatment on raw materials: removing impurities from waste plant oil; step b, carrying out esterification conversion: adding lower alcohols and the waste plant oil preprocessed in step a into a reactor with/without a catalyst to carry out esterification reactions or ester exchange reactions, wherein the reaction temperature is 60 to 120 DEG C, and the reaction time is 3 to 8 hours; step c, refining and separating the reaction products: precipitating and separating the reaction products obtained in the step b, and then refining the reaction products to obtain a refined product; step d, carrying out performance improvement: adding the surfactant and the high temperature resistant processing agent so as to obtain a finished product.

Description

technical field [0001] The invention belongs to the technical field of oil and gas well engineering, and in particular relates to a waste vegetable oil drilling fluid lubricant and a preparation method thereof. Background technique [0002] Drilling friction, also known as drilling friction, refers to the frictional resistance between the drilling string and the well wall during drilling, mainly composed of the axial friction force of the drill string and the circumferential friction torque. During the drilling process, when drilling with a diamond drill bit, the drilling tool is required to rotate at a high speed, and the annular gap between the drilling tool and the well wall is small, and the same is true for wireline core drilling. Because the resistance generated by the high-speed rotation of the drilling tool is very large. Especially during directional drilling, due to the large curvature of the wellbore, when the drilling tool is tripped, the drilling tool often con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/035
CPCC09K8/035C09K2208/34
Inventor 郭祥鹃吕振华严波孙庆林祁亚男李蕾杨华成效华
Owner CHINA PETROCHEMICAL CORP
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