Lubricating defoamer for drilling fluid and preparation method thereof

A defoamer and drilling fluid technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of poor mud lubrication performance, well kick, and decreased drilling fluid density, and achieve good wettability and Permeability, simple on-site operation procedures, and the effect of reducing production costs

Active Publication Date: 2015-08-19
成都西油华巍科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The foaming of drilling fluid will bring many adverse effects to drilling engineering
First of all, when the drilling fluid foams seriously, the density of the drilling fluid measured on the ground will be greatly reduced, resulting in a drop in the pressure of the entire fluid column, which will reduce the pump efficiency. At the same time, the foaming of the drilling fluid will also deteriorate the lubricating performance of the mud. , the efficiency of cooling the drill bit is reduced
Secondly, the foaming of the drilling fluid will increase the viscosity and shear of the drilling fluid on the surface, and the flow performance will deteriorate, which will bring inconvenience to drilling
Third, once a large number of air bubbles are generated in the drilling fluid, if the treatment is not timely, the light one will cause a well kick, and the severe one will cause a series of downhole complex accidents such as blowout and well collapse.
[0004] Due to the lack of compound drilling fluid treatment agents with excellent performance, in order to solve the above problems, the usual treatment method is to add lubricant and defoamer to the drilling fluid at the same time, which has the disadvantages of large dosage, high cost, and great influence on the rheology of the drilling fluid. Disadvantages such as large size and complex on-site operation procedures

Method used

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  • Lubricating defoamer for drilling fluid and preparation method thereof
  • Lubricating defoamer for drilling fluid and preparation method thereof
  • Lubricating defoamer for drilling fluid and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] A lubricating defoamer for drilling fluid, which is made of the following components in weight percentage: 34% fatty acid, 18% organic amine; 33% base oil; 3% penetrating agent; 12% defoamer.

[0025] Prepare 5000Kg of drilling fluid lubricating defoamer, the specific raw materials and dosage are: corn oil 1700Kg, divinyl glycol amine 900Kg, aviation kerosene 1650Kg, fatty alcohol polyoxyethylene ether 150Kg, simethicone 600Kg.

[0026] The preparation method of above-mentioned drilling lubricating defoamer, it may further comprise the steps:

[0027] (1) Add corn oil into the reaction kettle and raise the temperature to 70°C while stirring;

[0028] (2) Add diethylene glycol amine into the reactor, keep stirring, continue to heat up to 140°C, and seal the reaction for 8 hours;

[0029] (3) Then add aviation kerosene, fatty alcohol polyoxyethylene ether and simethicone to the reaction kettle, keep stirring, and keep the temperature at 80°C for 4 hours to obtain a finis...

Embodiment 2

[0031] A lubricating defoamer for drilling fluid, which is made of the following components in weight percentage: 32% fatty acid, 16% organic amine; 33% base oil; 5% penetrating agent; 14% defoamer.

[0032] Prepare 5000Kg of lubricating and defoaming agent for drilling fluid. The specific raw materials and dosage are: 1600Kg of mixed oil of rapeseed oil and peanut oil mixed at a weight ratio of 1:1, 800Kg of diethylene glycol amine, 1650Kg of aviation kerosene, fatty alcohol Polyoxyethylene ether 250Kg, simethicone 700Kg.

[0033] The preparation method of above-mentioned drilling lubricating defoamer, it may further comprise the steps:

[0034] (1) Add corn oil into the reaction kettle and raise the temperature to 62°C while stirring;

[0035] (2) Add diethylene glycol amine into the reaction kettle, keep stirring, continue to heat up to 135°C, and seal the reaction for 10h;

[0036] (3) Then add aviation kerosene, fatty alcohol polyoxyethylene ether and simethicone into t...

Embodiment 3

[0038] A lubricating defoamer for drilling fluid, which is made of the following components in weight percentage: 32% fatty acid, 16% organic amine; 38% base oil; 3% penetrating agent; 11% defoamer.

[0039] Prepare 5000Kg of drilling fluid lubricating defoamer, the specific raw materials and dosage are: rapeseed oil, peanut oil, corn oil, soybean oil, olive oil mixed in a weight ratio of 1:1:2:3:1:5:1 1600Kg of mixed oil of sesame oil and sunflower oil, 800Kg of diethylene glycol amine, 1900Kg of aviation kerosene, 150Kg of fatty alcohol polyoxyethylene ether, and 550Kg of dimethicone.

[0040] The preparation method of above-mentioned drilling lubricating defoamer, it may further comprise the steps:

[0041] (1) Add corn oil into the reaction kettle and raise the temperature to 78°C while stirring;

[0042] (2) Add diethylene glycol amine to the reactor, keep stirring, continue to heat up to 148°C, and seal the reaction for 6.5 hours;

[0043] (3) Then add aviation kerosen...

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Abstract

The invention provides a lubricating defoamer for a drilling fluid and a preparation method thereof. The lubricating defoamer for the drilling fluid is prepared from the following raw materials by weight percent: 30-43% of fatty acid, 15-25% of organic amine, 30-40% of base oil, 2-6% of penetrating agent and 10-15% of defoamer. Compared with the prior art, the lubricating defoamer for the drilling fluid is capable of functioning as the lubricant and the defoamer at the same time; the field operation steps are simple and the production cost is reduced.

Description

technical field [0001] The invention relates to a lubricating defoamer for drilling fluid and a preparation method thereof. Background technique [0002] With the expansion and deepening of oil and gas exploration and development, the intensity of drilling and development has been increasing, the difficulty of drilling has increased, and the complexity of drilling has become more prominent. Since the 1980s, my country has carried out the research and application of horizontal well drilling technology, and excessive friction and torque are a major unfavorable factor in the process of horizontal well drilling. During the drilling process of horizontal wells and directional wells, when the positive pressure of the drill string on the well wall of the inclined well section is constant, the low drilling fluid lubrication coefficient makes the frictional resistance of the drill pipe and the well wall relatively smaller, which can greatly reduce the friction between the drill pipe ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/035
Inventor 宋芳
Owner 成都西油华巍科技有限公司
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