Multiple-purpose reagent for process liquids used in boring operation and in pullout of holes

FIELD: lubricants and boring engineering.

SUBSTANCE: multiple-purpose reagent containing lubrication-and-stabilization component (70-80%) and solvent (20-30%) contains, as said lubrication-and-stabilization component, oxidized mixture of paraffins, naphthenic and aromatic hydrocarbons at ratio 2:3:4, and, as said solvent, diesel fuel or kerosene.

EFFECT: improved lubrication properties of viscous-plastic drilling fluids and stabilized inverted emulsions used in boring operation and in pullout of hole.

2 cl, 2 tbl, 6 ex

 

The invention relates to the field of chemical reagents comprehensive actions for process fluids used in drilling and workover.

Known reagent for drilling fluids - "snpch-6016", containing 90% of oleic acid and 10% VAT residue production butyl alcohol /Haarlow, Mscode, Vingradinka. Application of inverse emulsions in oil production. M.: Nedra, 1991, s/. Known reagent are simply mixing the starting components.

The disadvantages of the known reagent "snpch-6016" are

1) low storage stability due to changes in the composition of the lubricating additives due to polymerization of oleic acid, as well as polycondensation and oxidation of the oil and samalanga aldehydes contained in the VAT residue butyl alcohols;

2) relatively high toxicity and Carcinogenicity bottoms butyl alcohols;

3) the heterogeneity of the composition and, consequently, the necessity of thoroughly before use to mix;

4) the absence of any strukturoobrazovatelja properties;

5) low filtration characteristics;

6) the high value of the wear rate of steel tribological parameter) 48 mm/min

Closest to the claimed composition (prototype) is a reagent for drilling fluids "Smad-1"represent the s a 50% solution of oxidized petroleum butter in diesel fuel / Vielcnav, Ibhayi. Hydrophobic-emulsion solutions. M.: Nedra, 1983, p.75/. "Smad-1" is designed to improve the lubricating properties of the mud and stabilize the invert emulsion.

The disadvantages of the known reagent "Smad-1" are

1) use in the composition of the reagent is oxidized petroleum butter, which represents an oxidized mixture of ceresin and volatile oil composition, affects the acquisition and control of the properties of drilling muds;

2) not enough small filtrated at stabilization of invert emulsions;

3) tribological properties (wear rate of the steel) is greater than 0.47 mm/min;

4) electrocapillary invert emulsion based on the Smad-1" not exceeding 250 V;

5) low structural-mechanical properties of invert emulsions;

6) the heterogeneity of the composition associated with low selectivity of the oxidation of ceresin and oil included in the composition of petroleum butter;

7) floating acid number "of Smad-1", which reflects badly on the quality of lubricant additives and leads to the volatility characteristics of released parties "Smad-1".

The technical result of the invention is to improve the lubricating properties of the visco-plastic drilling fluids and stabilize the invert emulsion used in the drilling and repair of wells.

The reagent complex of actions for technological LM the bones, used in drilling and workover containing lubricating-stabilizing component and the solvent, as a lubricating-stabilizing component contains the oxidized mixture of paraffins, naphthenic and aromatic hydrocarbons in the ratio 2:3:4 respectively in the following ratio of components, % by mass: the specified mixture of paraffins, naphthenic and aromatic hydrocarbons 70,0 - 80,0, solvent 20,0 - 30,0.

The solvent specified reagent contains diesel fuel or kerosene.

We offer the reagent obtained by mixing the components in the specified proportions of the ingredients at a temperature of 65-95 With° and stirring for 0.5-1 hours

The content of oxidized mixture of paraffins, naphthenic and aromatic hydrocarbons in the ratio 2:3:4 respectively (GOST 10585-99) in kerosene or diesel fuel selected within 70,0-80,0% wt. Contained in the solution above 80% increases the pour point of the proposed reagent that creates technological difficulties associated with the need to heat the reagent. The use of the reagent with the concentration of the oxidized mixture of paraffins, naphthenic and aromatic hydrocarbons in the ratio 2:3:4 respectively (GOST 10585-99) below 48% not rational, because the increase of expenses and transportation costs.

Physico-chemical demonstration of the prevalence of reagent are presented in table. 1

The quality of the ingredients used

- kerosene (TU 38.601-22-70-97);

- diesel fuel (GOST 305-82);

- oxidized mixture of paraffins, naphthenic and aromatic hydrocarbons in the ratio 2:3:4 respectively (GOST 10585-99).

Performance of the proposed reagent are presented in table 2.

The examples of the preparation of the reagent

Example 1

To 20% wt. kerosene was added at 75°With 80% wt. the oxidized mixture of paraffins, naphthenic and aromatic hydrocarbons in the ratio 2:3:4 respectively (GOST 10585-99) (acid number 24) and stirred for 0.5-1 hours After cooling, received the reagent constituting the liquid of dark-brown color, Tget the=-18°, electrocapillary invert emulsion =400 V, viscosity=30.

Example 2

To 20% wt. diesel fuel added at 75°With 80% wt. the oxidized mixture of paraffins, naphthenic and aromatic hydrocarbons in the ratio 2:3:4 respectively (GOST 10585-99) (acid number 24) and stirred for 0.5-1 h After cooling the obtained reagent, representing a dark brown liquid, Tget the=-15°, electrocapillary invert emulsion =380 V, viscosity=32.

Example 3

To 20% wt. kerosene was added at 65°With 80% wt. the oxidized mixture of paraffins, naphthenic and aromatic hydrocarbons in the ratio 2:3:4 respectively (TH IS T 10585-99) (acid number 20) and was stirred for 1 h After cooling, the obtained reagent, representing a dark brown liquid, Tget the=-16°, electrocapillary invert emulsion =350, viscosity =31.

Example 4

To 20% wt. kerosene was added at 85°With 70% wt. the oxidized mixture of paraffins, naphthenic and aromatic hydrocarbons in the ratio 2:3:4 respectively (GOST 10585-99) (acid number 21) and stirred for 0.5-2 hours After cooling, the obtained reagent, representing a dark brown liquid, Tget the=-20°, electrocapillary invert emulsion =360, viscosity =29.

Example 5

When drilling SLE 215 field Odoptu-sea invert-emulsion drilling fluid containing (in wt.%) Okhtinskaya oil 14, an aqueous solution of calcium chloride 38,8, diesel fuel 22,7, Smad-1 2,8, Amaltal 1,6, lime, 0,8, barite 11,1, organobentonite 0,8, due to the developments of the solution of the colloidal fraction for drilling in the amount of 7.4% at the depth of 1660 m decreased the electrical stability of the solution from 180 to 120 C. In this case, the mechanical speed of drilling wells has decreased from 23 to 13 m/h without any changes in the drilling mode.

After processing of this drilling fluid during drilling of the proposed reagent obtained in example 1, through the ejector suction pump in quantities is 0.5% electrocapillary solution through two rinse cycle increased to 170, and penetration rate increased to 11.5 m/hour.

For similar processing solution in order to restore its electrical stability at well # 118 which used reagent Smad-1, it took 1% of the reagent.

Example 6

When you post a plot of the inclination angle with the intensity of 1.8 deg/10 m when the current angle is 47 degrees at a depth of 1711 m occurred landing drill string. Study interval did not give a lasting effect. Drilling was used viscoplastic polymerclay solution density of 1.17 g/cm3based bentonite brand PMBV treated with 1% Na2CO3, 0.5% carboxymethyl cellulose CMC-500 and 10% glicole. The coefficient of adhesion peel this solution was equal to 0.23. Processing samples of this solution offered by the reagent in the amount of 1% showed a decrease of the coefficient of adhesion peel to 0.11. After a similar treatment of the same solution in the well of the torque of the drill string has died down, allowing the dial to the desired inclination angle of 86 degrees.

Advantages of the proposed reagent compared to the prototype are the following:

1. High performance: low pour point (not more than -10° (C) and the rate of filtration, high structural-mechanical, tribological and stabilizing properties (electrocapillary more than 330).

2. The degree of impact on the human body, the reagent is a hazardous substance in accordance with the classification of GOST 12.007-76 refers to the substances of hazard class IV.

3. The use of cheap and available raw materials, industrial production is established in the Russian Federation.

4. Large quantitative yield of the target product and the absence of waste.

5. The possibility of regulation of the acid number of the target product.

6. The single-stage process the receipt.

The proposed reagent is intended for the stabilization of the hydrophobic emulsion solutions, as well as to improve the lubricating ability viscoplastic drilling fluids used during the drilling and repair of wells.

2004116722/03



Table 1
Name of indicatorValueControl method
1. AppearanceOily viscous liquid dark brown to black colorVisually transmitted-light
2. Acid number, mg KOH/g, not less than20According to GOST 22386
3. Viscosity at 50°S, conditional degrees WOO, no more than32 According to GOST 6258
Themperature solidification, °s, not higher-10According to GOST 20287




Table 2
Name of indicatorValueControl method
1. Electrocapillary invert emulsion>330On THE other 2458-001-50780546-2001
2. The rate of filtration, cm3/30 min, no more than4"-"
3. Static shear stress mud after 1 and 10 min of rest, PA, not more than1,2-2,0"-"
4. The wear rate of the steel rod in clay solution containing the additive of the proposed reagent, mm/min0,31"-"

1. The reagent complex of actions for process fluids used in drilling and workover containing lubricating-stabilizing component and a solvent, characterized in that the lubricating-stabilizing component it contains oxidized mixture of paraffins, naphthenic and aromatic hydrocarbons in the ratio 2:3:4 respectively in the following ratio of components, wt.%:

The mixture of paraffins,
naphthenic and aromatic
hydrocarbons70,0 - 80,0
Solvent20,0 - 30,0

2. The reagent according to claim 1, characterized in that the solvent it contains diesel fuel or kerosene.



 

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