CN105482786A - Extreme pressure friction reducing agent for drilling fluid - Google Patents
Extreme pressure friction reducing agent for drilling fluid Download PDFInfo
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- CN105482786A CN105482786A CN201410474247.7A CN201410474247A CN105482786A CN 105482786 A CN105482786 A CN 105482786A CN 201410474247 A CN201410474247 A CN 201410474247A CN 105482786 A CN105482786 A CN 105482786A
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- extreme pressure
- oil
- drilling fluid
- antiwear agent
- pressure antiwear
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Abstract
The present invention discloses an extreme pressure friction reducing agent for a drilling fluid, wherein the extreme pressure friction reducing agent is characterized by comprising two components such as 55-70% by mass of base oil, and 30-45% by mass of a surfactant. The extreme pressure friction reducing agent of the present invention has characteristics of good temperature resistance, good wear resistance and good lubricity, and can be used for drilling of deep wells, extended reach wells and horizontal wells.
Description
Technical field
The invention belongs to oil drilling field of engineering technology, relate to a kind of drilling fluid extreme pressure antiwear agent.
Background technology
Along with domestic probing exploitation dynamics constantly increases, the deep-well that extended reach well, long horizontal traverse well, horizontal well and dog-leg degree are larger gets more and more, and drilling well difficulty is also increasing, in drilling process, usually occurs the problem of sleeve pipe heavy wear.The problems such as the sleeve pipe abrasion perforation brought out thus, sleeve pipe crushing resistance and internal pressure strength obviously reduce have a strong impact on the follow-up well completing test operation of Oil/gas Well, reduce Oil/gas Well work-ing life, Oil/gas Well part well section or whole mouth Oil/gas Well time serious, also can be caused to scrap.Existing lubricant has vegetables oil, mineral oils; Paraffin, ethylene glycol polyethylene glycols etc.There is an important defect in these lubricants: can only work at low load, wear-resistant and lubricity is undesirable under high-load condition (high temperature, high pressure, high-density, high drilling speed), the needs of deep-well, ultra-deep well drilling, extended reach well drilling well can not be met.Along with oil field at home exploitation is expanded to deeper formation, marine bed and field, unconventional stratum gradually, the difficulty of drilling well is increasing, horizontal well, extended reach well and ultra deep well are more and more, adhere to bit freezing phenomenon to happen occasionally, more and more higher to the oilness of drilling fluid, anti-friction characteristics requirement, can good, the extreme pressure lubricant that simultaneously has again fine lubrication function of abrasion resistance in the urgent need to developing.
Summary of the invention
The invention provides a kind of drilling fluid extreme pressure antiwear agent.Have the extreme pressure antiwear agent of excellent anti-friction performance and lubricity concurrently, solve to drilling fluid lubricating and anti-friction characteristics requirement in Complex formation drilling, reduce the wearing and tearing of drilling tool, improve the oilness of drilling fluid system, improve drilling speed, reduce drilling cost.
Object of the present invention is achieved through the following technical solutions: provide a kind of drilling fluid extreme pressure antiwear agent, is made up of, base oil and tensio-active agent two kinds of components.
Described extreme pressure antiwear agent comprises following two kinds of components, base oil 55%-70%, tensio-active agent 30%-45%, by mass percentage.
Described base oil is the mixture of one or more in diesel oil, biofuel, white oil, vegetables oil, animal oil, mineral oil.
Described tensio-active agent is that laurylamide boric acid diethanolamine ester, N-dodecyl boric acid diethanolamine ester, glycerin fatty acid ester, lipid acid sorb are smooth, the mixture of one or more in polysorbate.
Extreme pressure antiwear agent disclosed in this invention, its preparation method is simple, and raw material is easy to get, and cost is lower, has good temperature resistance, resistance to abrasion, oilness and can bearing.
Embodiment
Below in conjunction with embodiment, technique of the present invention is described.
Embodiment 1
Take 60g mineral oil, 20g laurylamide boric acid diethanolamine ester, 20g lipid acid sorb ester in there-necked flask, mechanical stirrer stirs 40min with 800rpm and makes liquid agitation even, can extreme pressure antiwear agent be obtained.
Embodiment 2
Take 30g white oil, 35g biofuel, 20g glycerin fatty acid ester, 15g polysorbate in there-necked flask, mechanical stirrer stirs 40min with 800rpm and makes liquid agitation even, can extreme pressure antiwear agent be obtained.
Embodiment 3
Take 45g diesel oil, 25g vegetables oil, 30g laurylamide boric acid diethanolamine ester in there-necked flask, mechanical stirrer stirs 40min with 800rpm and makes liquid agitation even, can extreme pressure antiwear agent be obtained.
Embodiment 4
Take 55g vegetables oil, 45g laurylamide boric acid diethanolamine ester in there-necked flask, mechanical stirrer stirs 40min with 800rpm and makes liquid agitation even, can extreme pressure antiwear agent be obtained.
Embodiment 5
Take 35g diesel oil, 25g biofuel, 10g white oil, 30g glycerin fatty acid ester in there-necked flask, mechanical stirrer stirs 40min with 800rpm and makes liquid agitation even, can extreme pressure antiwear agent be obtained.
Embodiment 6
The anti-friction performance of product in above embodiment is tested according to the method specified in standard Q/SH1170060-2014.The anti-friction performance vector reduced rate that rubs characterizes.Concrete operation step is as follows:
1) base slurry is prepared
Base slurry formula: add 1.4g anhydrous sodium carbonate, 40.0g drilling fluid test sodium bentonite in 1000mL distilled water successively, after high-speed stirring 20min, twice should be stopped in whipping process, scrape the wilkinite sticked on jar with glass stick, room temperature curing in airtight condition 24h.
2) choose test grinding column two and be only numbered 1
#with 2
#for subsequent use, two test grinding columns are put into and filled the vessel that boiling range is 60 DEG C ~ 90 DEG C of sherwood oils, with absorbent cotton removing test grinding column surface contaminants, and continuous wash twice.Through the test grinding column of absorbent cotton process, 5min is about by soaked in absolute ethyl alcohol, take out test grinding column, dry with gauze, dry up with cold wind that (the unavailable hand of test grinding column after treatment directly touches, in order to avoid pollute) wrap, put into the dry 30min of moisture eliminator, weigh (being accurate to 0.0001g) draws M
01and M
02.
3) handle well 1
#test grinding column installs, and gets base slurry 200mL and pours in testing cassete, make test fluid submergence bull ring lower edge with graduated cylinder.Start to add counterweight after No Load Start motor, every counterweight increases timed interval 5s, and transfers gently, starts timing, close trier after 3min after counterbalance mass is added to 2kg.By 1 after mensuration
#test grinding column is by the method process in b step and weigh (being accurate to 0.0001g) draws M
1.
4) get base slurry 300mL, add anti-friction composition sample 3.0g, get 200mL after high-speed stirring 5min and pour in testing cassete, handle well 2
#test grinding column installs, and tests, by 2 after mensuration by the method in step C
#test grinding column is by method process in b step and weigh (being accurate to 0.0001g) draws M
2.
The vector that rubs calculates by formula (1):
（1）
In formula:
---rub vector reduced rate, %;
,---grinding column quality before test, g;
---grinding column quality after test in base slurry, g;
---base slurry adds the rear grinding column quality of low friction compound test, g.
Test result is in table 1:
Table 1 rubs vector reduced rate test result
| Sample ID | Mill vector reduced rate |
| Embodiment 1 | 92.97% |
| Embodiment 2 | 99.73% |
| Embodiment 3 | 96.87% |
| Embodiment 4 | 95.73% |
| Embodiment 5 | 96.69% |
| Polymeric alcohol | 45% |
The vector reduced rate that rubs of embodiment 1-5 is all greater than 90%, and the vector reduced rate that rubs of the existing polymeric alcohol commercially used only has 45%, and result shows the anti-friction excellent property of this drilling fluid extreme pressure antiwear agent.
Embodiment 7
According to product lubricity in the method testing example 1-5 specified in standard Q/SH1170060-2014, lubricity lubricating coefficient reduced rate characterizes.Concrete operation step is as follows:
Prepare four parts of base slurries, every part adds 300mL distilled water, 0.6g anhydrous sodium carbonate, 15.0g drilling fluid test sodium bentonite, high speed agitator stirs 20min, should stop twice in whipping process, the wilkinite sticked on jar is scraped, room temperature curing in airtight condition 24h with glass stick.Take out wherein two parts of base slurries and add anti-friction composition sample 3.0g, then stir 5min by four parts high.E-P extreme boundary lubrication instrument measures the lubricating coefficient of base slurry and sample slurry respectively, according to SY/T6094 lubricant for drilling fluids assessment process, (torque arm applies 150psi pressure to measuring method, keep rotating speed 60r/min), and formula (2) calculates lubricating coefficient reduced rate.
（2）
In formula:
---lubricating coefficient reduced rate, %;
---the lubricating coefficient of base slurry;
---base slurry adds the lubricating coefficient after low friction compound.
Test result is in table 2:
Table 2 lubricating coefficient reduced rate test result
| Sample ID | Lubricating coefficient reduced rate |
| Embodiment 1 | 85.04% |
| Embodiment 2 | 89.18% |
| Embodiment 3 | 86.79% |
| Embodiment 4 | 82.95% |
| Embodiment 5 | 87.59% |
| Polymeric alcohol | 17% |
Now the lubricating coefficient reduced rate of polymeric alcohol commercially only has 17%, and the lubricating coefficient reduced rate of embodiment 1-5 is all greater than 80%, finds out that this extreme pressure antiwear agent has good oilness from test result.
Embodiment 8
Weight capacity is a kind of detection method of product anti-friction performance.Weight capacity according to product in following steps testing example 1-5:
Weight tray is placed on rattling machine reinforcement multiple L place (L is 28 or 30), extreme pressure anti-friction composition is joined in the oil box of rattling machine, start motor, counterweight (first three block counterweight will slowly be put) is added one by one at long arm of force end, break to oil film extreme pressure and send harsh noise, calculating the gross weight M of added counterweight.According to the weight capacity P increasing power multiple and counterweight total weight extreme pressure antiwear agent, weight capacity calculation formula:
P=M×L+20（3）
In formula:
P---weight capacity, Kg;
The gross weight of M---counterweight, Kg;
L---increase multiple;
20---original pressure, Kg.
P value larger explanation extreme pressure antiwear agent oil film is thicker, and anti-wear effect is better.
Test result is in table 3:
Table 3 weight capacity test experiments
| Sample ID | Weight capacity, Kg |
| Embodiment 1 | 320 |
| Embodiment 2 | 260 |
| Embodiment 3 | 290 |
| Embodiment 4 | 320 |
| Embodiment 5 | 320 |
| Polymeric alcohol | 60 |
Test result shows that embodiment 1-5's can be greater than 200Kg by bearing capacity, is better than the used polymeric alcohol in market.
Embodiment 9
Measure the temperature tolerance of product in embodiment 1-5 according to the method specified in standard Q/SH1170060-2014, concrete steps are as follows:
Prepare 6 parts of base slurries, every part adds 300mL distilled water, 0.6g anhydrous sodium carbonate, 15.0g drilling fluid test sodium bentonite, high speed agitator stirs 20min, should stop twice in whipping process, the wilkinite sticked on jar is scraped, room temperature curing in airtight condition 24h with glass stick.Take out wherein five parts of base slurries and add anti-friction composition sample 3.0g, then stir 5min by six parts high, join the interior roller heating stove of high temperature ageing still aging 16h at 150 DEG C.E-P extreme boundary lubrication instrument measures the lubricating coefficient of base slurry and sample slurry respectively, according to SY/T6094 lubricant for drilling fluids assessment process, (torque arm applies 150psi pressure to measuring method, keep rotating speed 60r/min), and calculate lubricating coefficient reduced rate by following formula.
In formula:
---lubricating coefficient reduced rate, %;
---the lubricating coefficient of base slurry;
---base slurry adds the lubricating coefficient after low friction compound.
Test result is in table 4:
Table 4150 DEG C heat rolls the lubricating coefficient reduced rate after aging 16h
| Sequence number | Lubricating coefficient reduced rate |
| Embodiment 1 | 82.13% |
| Embodiment 2 | 85.06% |
| Embodiment 3 | 83.79% |
| Embodiment 4 | 80.95% |
| Embodiment 5 | 84.59% |
| Polymeric alcohol | 9% |
The result of test result and embodiment 7 declines to some extent, but the amplitude declined is very little, illustrates that the heat resistance of this extreme pressure antiwear agent is good.
Claims (4)
1. a drilling fluid extreme pressure antiwear agent, is characterized in that this extreme pressure antiwear agent is made up of two kinds of components, base oil and tensio-active agent.
2. drilling fluid extreme pressure antiwear agent as claimed in claim 1, is characterized in that base oil content: 55%-70%, surfactant content: 30%-45%, and each composition by mass percentage.
3. drilling fluid extreme pressure antiwear agent as claimed in claim 1, is characterized in that: described base oil is the mixture of one or more in diesel oil, biofuel, white oil, vegetables oil, animal oil, mineral oil.
4. drilling fluid extreme pressure antiwear agent as claimed in claim 1, is characterized in that: described tensio-active agent is that laurylamide boric acid diethanolamine ester, N-dodecyl boric acid diethanolamine ester, glycerin fatty acid ester, lipid acid sorb are smooth, the mixture of one or more in polysorbate.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110776882A (en) * | 2018-07-31 | 2020-02-11 | 中国石油化工股份有限公司 | Targeted friction-reducing resistance-reducing agent |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110776882A (en) * | 2018-07-31 | 2020-02-11 | 中国石油化工股份有限公司 | Targeted friction-reducing resistance-reducing agent |
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Address after: Liuhe District of Nanjing City, Jiangsu province 210048 geguan Road No. 699 Patentee after: China Petroleum & Chemical Corp. Patentee after: SINOPEC NANJING CHEMICAL RESEARCH INSTITUTE Co.,Ltd. Address before: Liuhe District of Nanjing City, Jiangsu province 210048 geguan Road No. 699 Patentee before: China Petroleum & Chemical Corp. Patentee before: Nanhua Group Research Institute |