CN1340588A - Lubricant and its preparing process - Google Patents
Lubricant and its preparing process Download PDFInfo
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- CN1340588A CN1340588A CN 00123725 CN00123725A CN1340588A CN 1340588 A CN1340588 A CN 1340588A CN 00123725 CN00123725 CN 00123725 CN 00123725 A CN00123725 A CN 00123725A CN 1340588 A CN1340588 A CN 1340588A
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- lubricating oil
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Abstract
A lubricating agent for well drilling liquid is prepared from graphite (40-80 wt. portions), lignite (10-40), sodium hydroxide (3-10), sodium pyrosulfite (5-10) and formaldehyde (5-10) through sulfornating reaction and polymerization reaction. It has good lubricating nature and effectively preventing drill jam.
Description
The present invention relates to lubricant and preparation method thereof, specifically be suitable for lubricant that uses with drilling fluid mixed and preparation method thereof.
Along with the development of drilling well industry, directional well cluster drilling technology has obtained using widely. In marine drilling, horizontal well technology is widely applied especially. This just brings Secretary for the practical operation technology in the drilling process. For example: along with the increase of drilling well vertical depth and horizontal length ratio, also thereupon significantly increase of frictional resistance that drilling tool is suffered, therefore mechanical breakdown usually occurs in drilling tool. For addressing this problem, in drill-well operation, usually in drilling fluid, directly add the low-carbon-content graphite powder, to reduce the coefficient of friction resistance, reduce the generation of bit freezing phenomenon, yet its effect is not very good. Because add simple graphite, its lubricating coefficient reduced rate is not remarkable, and has also affected the rheological characteristic of drilling fluid.
Of the present inventionly just provide a kind of high lubricating effect, the lubricant with drilling fluid mixed is used provides a kind of method for preparing this lubricant simultaneously.
Purpose of the present invention: be the component that contains the following weight parts ratio of selecting that realizes like this: graphite 40-80 part, brown coal 10-40 part, caustic soda 3-10 part, sodium pyrosulfite 5-10 part, formaldehyde 5-10 part.
The preparation method can adopt brown coal and the caustic soda that will take by weighing in the weight part ratio scope that it is mixed, add again sodium pyrosulfite and formaldehyde mixed liquor, can also add suitable quantity of water solution during overdrying, carry out sulfonating reaction after fully moistening, in the paste sulfonating reaction thing that generates, add graphite powder, after the polymerization, granulation.
In order further to improve lubricant effect, be preferably in the aforesaid composition, add again the component of following weight parts ratio: mineral lubricating oil 1-5 part, emulsifying agent 1-5 part, sodium metasilicate 1-3 part.
Preferred weight part ratio of lubricant of the present invention is:
Graphite 60-70 part, brown coal 20-40 part, caustic soda 5-7 part, sodium pyrosulfite 7-8 part, formaldehyde 7-8 part, mineral lubricating oil 2-3 part, emulsifying agent 2-3 part, sodium metasilicate 2-3 part.
It is middle carbon or the high-carbon graphite of 80-96% that graphite in the lubricant of the present invention is preferably selected phosphorus content, and its powder fineness so not only can increase the lubricating coefficient reduced rate, but also can guarantee the good rheological of drilling fluid take the 100-200 order as preferred.
Mineral lubricating oil in the lubricant of the present invention can be selected white oil, machine oil, diesel oil, but with white oil for most preferably, because white oil is inexpensive and without fluorescence.
Emulsifying agent in the lubricant of the present invention can be selected oleic acid, dodecylbenzene sulfonic acid, O π/7, SP/80, glycerin polyether etc. wherein oleic acid inexpensive, be applicable to a large amount of uses, so be preferred emulsifier of the present invention.
The present invention also provide prepare this lubricant a kind of concrete preparation method its contain successively the following step:
A, take by weighing graphite, brown coal, caustic soda, sodium pyrosulfite, formaldehyde, mineral profit by described weight part ratio
Lubricating oil, emulsifying agent, sodium metasilicate.
B, place reactor to mix in brown coal, caustic soda, add the mixed liquor of sodium pyrosulfite and formaldehyde, at normal pressure, 30-90 ℃ of condition, lower sulfonating reaction 3-5 hour. Sulfonation overlong time or too shortly all can the rheological characteristic of drilling fluid be had a negative impact.
Add graphite, mineral lubricating oil, emulsifying agent, sodium metasilicate in C, the sulfonating reaction thing, under normal pressure, under the 30-90 ℃ of condition, polymerisation 2-3 hour. Brown coal through sulfonation are water-soluble, with the polymerisation of graphite in can be with the graphite parcel wherein, thereby reduced filter loss and the viscosity of drilling fluid.
D, with the polymer granulation.
Lubricant of the present invention has good greasy property, and it can improve the reduced rate of lubricating coefficient greatly, and can guarantee not destroy the rheological characteristic of drilling fluid.
The computing formula of the lubricating coefficient reduced rate among the present invention is:
Lubricating coefficient is measured by the extreme boundary lubrication instrument. Usually liquidly represent with lubricating coefficient, and solid-stately represent with the coefficient of friction resistance.
The rheological characteristic of drilling fluid is to be characterized by the surface viscosity of drilling fluid, yield value, gel strength, filter loss. Apparent viscosity is low in general, the little then coefficient of friction resistance of yield value is little, and it is few that the moisture content in the bright drilling fluid of filter loss novel is penetrated into the stratum amount, is conducive to the utilization of drilling fluid. Gel strength generally should be controlled at certain limit relatively, all is unfavorable for taking out of and getting rid of of drilling cuttings because it is excessive, too small.
Lubricant of the present invention is added in the drilling fluid and uses, and the rheological characteristic that it has larger lubricating coefficient reduced rate and does not change drilling fluid illustrates that it has good lubricity. Its preferred component and proportional quantity can improve the rheological characteristic of drilling fluid simultaneously, then more are conducive to carrying out smoothly of drilling operation.
From lower tabulation 1-4, we can find out that the selection of different parameters in each component, proportioning and the preparation process has different experiment effects.
Table 1 raw material proportioning difference is on the impact of lubrication
| Example | Graphite | Brown coal | Caustic soda | Sodium pyrosulfite | Formaldehyde | Mineral lubricating oil | Emulsifying agent | Sodium metasilicate | Lubricated most reduced rates | Apparent viscosity mpa.s | Yield value Pa | Filter loss ml |
| 1 | 20 | 70 | 5 | 5 | 5 | 23 | Reduce | Reduce | Reduce | |||
| 2 | 50 | 40 | 5 | 5 | 5 | 45 | Constant | Constant | Reduce | |||
| 3 | 80 | 10 | 5 | 5 | 5 | 65 | Constant | Constant | Constant | |||
| 4 | 70 | 20 | 3 | 8 | 8 | White oil 2 | Oleic acid 5 | 2 | 68 | Reduce | Reduce | Reduce |
| 5 | 40 | 30 | 7 | 7 | 7 | Machine oil 3 | Ten sodium disulfonates3 | 3 | 55 | Constant | Constant | Constant |
| 6 | 60 | 30 | 10 | 10 | 10 | Diesel oil 5 | Glycerin polyether1 | 1 | 60 | Constant | Constant | Constant |
| 7 | 70 | 40 | 7 | 7 | 8 | White oil1 | Oleic acid 2 | 3 | 63 | Reduce | Reduce | Reduce |
Example 2-7 in the table 1 is specific embodiments of the invention 2-7, and wherein the sulfonation time aggregation time among the example 2-7 preparation method is 3 hours, and sulfonation temperature is 50 ℃, and polymerization temperature is 50 ℃. The phosphorus content of graphite and fineness are also identical.
The impact of difference, fineness difference and the sulfonation time of performance graphite phosphorus content, polymerization time, reinforced time ordered pair effect of the present invention, component and proportioning selected in table 2, table 3, each example of table 4 are all identical.
Table 2: the graphite phosphorus content is on the impact of lubricant effect
| Phosphorus content % | The fineness order | Lubricating coefficient reduced rate % | Apparent viscosity mPa.s | Yield value Pa | Filter loss ml |
| 50 | 150 | 13 | Raise | Raise | Constant |
| 80 | 150 | 45 | Constant | Constant | Constant |
| 96 | 150 | 55 | Constant | Constant | Constant |
| 96 | 45 | 30 | Constant | Constant | Raise |
| 96 | 100 | 50 | Constant | Constant | Constant |
| 96 | 200 | 68 | Raise | Raise | Constant |
Table 3: sulfonation, polymerization time are on the impact of lubricant effect
| Sulfonation hour | Polymerization hour | Lubricating coefficient reduced rate % | Apparent viscosity mPa.s | Yield value Pa | Filter loss ml |
| 1 | 3 | 35 | Raise | Raise | Raise |
| 3 | 3 | 60 | Reduce | Reduce | Constant |
| 5 | 3 | 65 | Reduce | Reduce | Constant |
| 3 | 1 | 40 | Constant | Constant | Raise |
| 3 | 3 | 61 | Constant | Constant | Constant |
| 3 | 5 | 65 | Raise | Raise | Constant |
The impact of the reinforced time ordered pair lubricant effect of table 4
| Sulfonation process | Polymerization process | Lubricating coefficient reduced rate % | Apparent viscosity mPa.s | Yield value Pa | Filter loss ml |
| Before | After | 68 | Reduce | Reduce | Reduce |
| After | Before | 25 | Raise | Raise | Raise |
From table 1-table 4, the parameter that can find out the each component preparation method in the lubricant select all meet setting range of the present invention all have a good greasy property.
Excellent results of the present invention can obtain clear and definite checking from table 5
Show from the listed numerical value of table 5:
When 1, lubricant of the present invention was dissolved in water, its solubility showed that greater than simple graphite powder lubricant it is conducive to reduce surface viscosity and the filter loss of drilling fluid.
2, carry out Fineness with sub-sieve, show that its fineness of lubricant of the present invention obviously greater than simple graphite powder lubricant, shows that its greasy property is better.
3, the data of property of drilling fluid are less, show that lubricant of the present invention is little to the rheology impact of drilling fluid, are suitable for using with drilling fluid mixed.
4, lubricating coefficient reduced rate of the present invention shows that obviously greater than simple graphitic lubricant its greasy property obviously is better than simple graphitic lubricant.
5, high temperature and high pre ssure filtration of the present invention is significantly less than simple graphitic lubricant, shows that it is conducive to taking full advantage of of drilling fluid.
Table 5 lubricant of the present invention and simple graphitic lubricant Contrast on effect table
| Multifunctional solid lubricant for well | The graphite powder lubricant | ||||
| The hydrotrope | 5.00g be dissolved in the 500ml distilled water: 1, room temperature, 73.4% precipitation, 26.6% dissolving, slightly floating thing. 2, solution is brownish red, and is opaque, pH value 6.5, and precipitation is sand shape. | 5.00g be dissolved in the 500ml distilled water: 1, room temperature, 97.2% precipitation, 2.8% dissolving, wherein partly precipitated is floating. 2, solution water white transparency, pH value 6.0,4/5 precipitations, particle becomes grains of sand shape to disperse. | |||
| Fineness | More than 100 orders: 17.5% 100～200 order, 38% 200 orders following 44.5% | Above 67.5% 100～200 order of 100 orders 33% 200 orders following 9.5% | |||
| Dosage | 0.5％ | 1％ | 1.5％ | 3％ | |
| Property of drilling fluid | FLml | 21.5 | 20 | 22.5 | 21 |
| PH value | 8.5 | 8.5 | 8.5 | 8.5 | |
| G10″ | 1.5 | 2 | 2 | 2 | |
| G10＇ | 3 | 4 | 3.5 | 3.5 | |
| Φ600 | 13.5 | 14 | 14 | 15 | |
| Φ300 | 8 | 10 | 9 | 10 | |
| Φ200 | 6.5 | 8 | 7 | 9 | |
| Φ100 | 5 | 6 | 5 | 8 | |
| Φ6 | 2 | 4 | 2 | 5 | |
| Φ3 | 2 | 3 | 2 | 4 | |
| AV mPa.s | 6.75 | 7.0 | 7 | 7.5 | |
| PV mPa.s | 5.5 | 4 | 5 | 5 | |
| YP Pa | 1.25 | 3 | 2 | 2.5 | |
| Lubricating coefficient reduced rate % | 60 | 65 | 33 | 40 | |
| High temperature and high pre ssure filtration ml | 32 | 28 | 54 | 45 | |
| Environmental protection | Meet environmental requirement, no dust pollution | The black dust polluting environment, unfavorable to health of human body | |||
Table 6 is embodiment of the invention 1 and 8,9,10
The present embodiment preparation process is ditto described, and just, technological parameter and amounts of components are different, but all have good result of the present invention.
Claims (7)
1, a kind of lubricant is characterized in that it contains the component of following weight parts ratio: graphite 40-80 part, brown coal 10-40 part, caustic soda 3-10 part, sodium pyrosulfite 5-10 part, formaldehyde 5-10 part.
2, lubricant according to claim 1 is characterized in that it also contains the component of following weight parts ratio: mineral lubricating oil 1-5 part, emulsifying agent 1-5 part, sodium metasilicate 1-3 part.
3, lubricant according to claim 2 is characterized in that the weight part ratio of said each combination is: graphite 60-70 part, brown coal 20-40 part, caustic soda 5-7 part, sodium pyrosulfite 7-8 part, 8 parts of formaldehyde 7-, mineral lubricating oil 2-3 part, emulsifying agent 2-3 part, sodium metasilicate 2-3 part.
4, lubricant according to claim 2 is characterized in that said graphite phosphorus content is 80-96%, and its powder fineness is 100 orders～200 orders.
5, lubricant according to claim 2 is characterized in that said mineral lubricating oil is white oil.
6, lubricant according to claim 2 is characterized in that described lactic acid agent is oleic acid.
7, the preparation method of lubricant according to claim 2 is characterized in that it contains the following step successively:
A, take by weighing each component by described weight part ratio;
B, place reactor to mix in brown coal, caustic soda, add the mixed liquor of sodium pyrosulfite and formaldehyde, under normal pressure, 30-90 ℃ condition, sulfonating reaction 3-5 hour;
Add graphite, mineral lubricating oil, emulsifying agent, sodium metasilicate in C, the sulfonating reaction thing, under 90 ℃ of conditions of normal pressure 30-polymerisation 2-3 hour.
D, with the polymer granulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00123725 CN1340588A (en) | 2000-09-01 | 2000-09-01 | Lubricant and its preparing process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00123725 CN1340588A (en) | 2000-09-01 | 2000-09-01 | Lubricant and its preparing process |
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| CN1340588A true CN1340588A (en) | 2002-03-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102199417A (en) * | 2010-03-23 | 2011-09-28 | 张以河 | Technology for preparing mineral composite solid lubricant for well drilling on basis of by-products in chemical industry |
| CN103980866A (en) * | 2013-02-08 | 2014-08-13 | 中国石油化工股份有限公司 | Graphite lubricant for drilling fluid and preparation method thereof |
-
2000
- 2000-09-01 CN CN 00123725 patent/CN1340588A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102199417A (en) * | 2010-03-23 | 2011-09-28 | 张以河 | Technology for preparing mineral composite solid lubricant for well drilling on basis of by-products in chemical industry |
| CN102199417B (en) * | 2010-03-23 | 2016-01-20 | 中国地质大学（北京） | One prepares drilling well mineral composite solid lubricating agent technology based on chemical byproduct |
| CN103980866A (en) * | 2013-02-08 | 2014-08-13 | 中国石油化工股份有限公司 | Graphite lubricant for drilling fluid and preparation method thereof |
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