Drilling foam composition

FIELD: production and exploratory well drilling, particularly foaming drilling fluids used during penetration through incompetent rock intervals and during primary productive oil and gas deposit opening in the case of abnormally low formation pressure.

SUBSTANCE: foam composition comprises surfactant, foam stabilizer, water, water hardness control additive and lubricant. The water hardness control additive is sodium silicate. The lubricant is VNIINP-117 emulsion. The foam stabilizer is polyacrylamide, the surfactant is sulphonole. All above components are taken in the following amounts (% by weight): sulphonole - 0.8-1.5, sodium silicate - 0.2-0.5, polyacrylamide - 0.1-0.5, VNIINP-117 - 0.5-2, remainder is water.

EFFECT: reduced power inputs for well drilling, as well as reduced coefficient of friction between drilling tool and well wall.

1 tbl

 

The invention relates to the field of drilling of exploration wells, in particular to the pins as washing liquids, and can be used with sinking unstable intervals breeds, as well as when drilling under conditions of abnormally low formation pressure during the primary opening of the productive deposits of oil and gas.

Known drilling fluid (RF patent No. 2027734, IPC 09 To 7/06, publ. 1995) to prevent private - clinicabarcelona containing electrolytes, bentonite or Askaneli clay, viscosity regulators, lubricity additive, barite and water, characterized in that as lubricating additives it contains oily additive NMR-1 in the following ratio, wt.%:

Bentonite or askargalieva clay27,0-7,0
Electrolytes6,0-2,2
Viscosity regulators4,9-0,8
Oily additive NMR 11,0-5,0
Barite0,1-46
Waterrest

The disadvantage of this structure is the high coefficient of friction of the drilling tool in the borehole, causing heavy wear and increased energy costs of drilling.

Known penoobrazujushchim for drilling permafrost (A.S. The USSR №1213172, IPC E 21 In 21/14, publ. 1971). Foamable composition containing a surfactant, anti-freeze and water, characterized in that to improve foaming properties of the composition, it contains as antifreeze urea in the following ratio, wt.%:

Surfactant - 0,05-0,5

Urea - 3-25

Water - the rest

The disadvantage of this solution is the high coefficient of friction of the drilling tool in the borehole, causing increased wear and increased energy costs of drilling.

Famous adopted for the prototype foamable composition for use as a drilling fluid under conditions of abnormally low formation pressure during the primary opening of the productive deposits of oil, gas and capital repair of wells (RF patent No. 2187533, IPC 09 To 7/08, publ. 2002). Foamable composition, including fresh water, foaming agent, stabilizer and seed, as a foam stabilizer contains modified starch and sulfate, and as the seed - chalk technical, the composition additionally contains alumoxane and soda ash in the following ratio, wt.%:

5,0-7,0
The foaming agent0,8-1,8
Modified starch
Alfacell0,18-0,3
Chalk technical3,0-4,0
Alumoxane1.1 to 1.4
Soda ash0,6-0,8
Fresh waterrest

The disadvantage of this solution is the high coefficient of friction of the drilling tool in the borehole, causing increased wear and increased energy costs of drilling.

The technical result of the invention is to reduce energy costs in drilling by reducing the coefficient of friction of the drilling tool in the borehole.

The technical result is achieved in that the foamable composition for drilling, containing surfactant, stabilizer, water, according to the invention it further comprises control water hardness in the form of sodium silicate, a lubricating additive in the form of emulsions its facilities at the Moscow-117, as a stabilizer, foam stability polyacrylamide and as surface-active substances of the sulfonic acid, in the following ratio, wt.%:

The sulfonic acid0,8-1,5
Sodium silicate0,-2
Polyacrylamide0,1-0,5
Its facilities at the Moscow-1170,5-2
Waterrest

The application of the proposed foaming composition for drilling compared to the prototype will reduce the coefficient of friction of the drilling tool in the borehole and to reduce the energy costs of drilling.

Foamable composition for drilling prepared as follows.

To the water add ingredients in the following ratio, wt.%:

The sulfonic acid0,8-1,5
Sodium silicate0,-2
Polyacrylamide0,1-0,5
Its facilities at the Moscow-1170,5-2

And stirred in a mixer to obtain a homogeneous solution.

The sulfonic acid added as a surfactant to obtain a foam required multiplicity. The foam ratio - the ratio of the volume of foam to the volume contained in the foam solution. The recommended amount of addition of sulfonic acid and 0.8 to 1.5 wt.%. This amount of sulfonic acid allows you to obtain the necessary stability of the foam. Polyacrylamide add 0.1-0.5% of the total mass to stabilize the foam stability. The specified range is selected to be either the most effective stabilization of the resulting foam. Sodium silicate in the composition to add as a regulator of water hardness in Koli is estwe of 0.2-0.5 wt.%. The specified interval allows you to bring water to the required stiffness for the complete dissolution therein a lubricating additive emulsion its facilities at the Moscow-117. Reduction of friction of the drilling tool in the borehole is achieved by introducing foamable composition a lubricating additive emulsion its facilities at the Moscow-117, in the amount of 0.5-2 wt.%.

Adding emulsions its facilities at the Moscow-117 less than 0.5% increases the coefficient of friction, and more than 2% of the total mass causes an appreciation of the foaming composition for drilling (see table 1).

Table 1
NameThe sulfonic acid,% wt.Sodium silicate,% wt.Polyacrylamide,% wt.Its facilities at the Moscow-117,% wt.Water,% wt.The coefficient of friction of the drilling tool
Composition 10,60,10,050,498,850,06
Part 20,80,20,10,598,40,055
Part 31,21,40,31,295,90,05
Part 41,52,00,52940,045
Part 51,62,10,62,193,60,04

Further prepared foamable composition serves pipes in the drilled hole through the circulation system in which the in composition to add air.

Air and foamable composition are dispersed and form a foam of a given multiplicity, selected on the basis of available geological drilling conditions. At the bottom of a well received drilling fluid in the form of foam is served drill pipe in the drilling process. Contaminated drill cuttings solution in the drilling process is extruded through the gap between the borehole wall and the drill pipes. On the surface of the contaminated drilling mud cleaned of sludge, foam destroy, then purified composition again through the circulation system is served in the well.

The application of this foaming composition for drilling provides the following benefits:

- reducing the coefficient of friction of the drilling tool;

- reduction of energy costs in drilling.

Foamable composition for drilling, containing surfactant, stabilizer, water, characterized in that it further comprises control water hardness in the form of sodium silicate, a lubricating additive in the form of emulsions its facilities at the Moscow-117, as stabil the congestion foam stability - polyacrylamide and as surface-active substances - sulfonic acid in the following ratio, wt.%:

The sulfonic acid0,8 - 1,5
Sodium silicate0,2 - 0,5
Polyacrylamide0,1 - 0,5
Its facilities at the Moscow-1170,5 - 2
WaterRest



 

Same patents:

FIELD: production and exploratory well drilling, particularly foaming drilling fluids used during penetration through incompetent rock intervals and during primary productive oil and gas deposit opening in the case of abnormally low formation pressure.

SUBSTANCE: foam composition comprises surfactant, foam stabilizer, water, water hardness control additive and lubricant. The water hardness control additive is sodium silicate. The lubricant is VNIINP-117 emulsion. The foam stabilizer is polyacrylamide, the surfactant is sulphonole. All above components are taken in the following amounts (% by weight): sulphonole - 0.8-1.5, sodium silicate - 0.2-0.5, polyacrylamide - 0.1-0.5, VNIINP-117 - 0.5-2, remainder is water.

EFFECT: reduced power inputs for well drilling, as well as reduced coefficient of friction between drilling tool and well wall.

1 tbl

Drilling mud // 2268909

FIELD: drilling wells; water-base drilling muds.

SUBSTANCE: drilling mud contains the following components, mass-%: clay, 1.5-3.0; carboxymethyl cellulose, 0.1-0.3;carboxymethyl starch, 0.75-1.5; mixture of ethers and amides of fatty acids and ethanol amides, 0.75-1.0; product of rectification of propylene oligomers of isoolefin type, fraction C13-C15, 0.75-1.5;lubricating additive, 0.5-3.0; the remainder being water.

EFFECT: enhanced inhibition ability of drilling mud at improved technological parameters.

2 tbl, 3 ex

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SUBSTANCE: invention relates to drilling fluids used when boring oil and gas wells. Lubricating additive contains 10-30% tall oil, 15-20% polyglycols, 40-50% oxal flotation reagent, and 15-20% beet molasses.

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2 tbl, 2 ex

FIELD: oil and gas production.

SUBSTANCE: invention relates to oil production technology involving use of hydrochloric acid-based chemicals via complex hydrochloric acid effect on well bottom zone to intensify oil production and may be specifically used to increase oil recovery of viscous oil-saturated low-permeable carbonate reservoirs. Composition contains 22-28% of 20 vol % aqueous HCl solution, 7-8% of 98% aqueous acetic acid solution, and 65-70% of solvent based on light pyrolysis tar obtained as secondary product from petroleum processing enterprises.

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4 tbl

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

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

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SUBSTANCE: invention provides water-based solid phase-free biocationic drilling fluid with density 10-70-1520 kg/m3. Drilling fluid contains 10-60% of a cation spectrum, namely calcium and sodium chlorides, and 0.1-2% of polymer additive, in particular xanthane series biopolymer.

EFFECT: improved wall-plastering and lubrication properties.

2 tbl

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SUBSTANCE: invention relates to materials used for cementing oil, gaseous, gas-condensate and geothermal holes under conditions of saline and hydrogen sulfide media. The salt-saturated plugging composition for high-temperature holes comprising a binding agent and sodium chloride includes additionally swollen vermiculite sand of fraction 0.3-2.5 mm in the following ratio of components, wt.-%: binding agent, 85-90; sodium chloride, 8-10; swollen vermiculite sand of fraction 0.3-2.5 mm, the balance. Invention provides preparing impermeable cement stone with enhanced coupling strength with a column in the range of temperatures 50-110°C.

EFFECT: improved properties of composition.

1 tbl

FIELD: petroleum and gaseous industry.

SUBSTANCE: invention relates to drilling oil and gaseous wells, in particular, to polymer-clay fluids for drilling used under conditions of permafrost rocks. Proposed polymer-clay fluid shows the improved pseudoplastic properties providing enhancing retaining and transporting capacity and treatment degree of the well walls, diminished filtration due to high rate in formation of low-penetrable filtration crust preventing the well pollution and promoting to retention of its collector properties, reduced rate of warming up of permafrost rocks that prevents formation of caverns and destruction of the well walls and as result provides prolonged retention of the well trunk in the stable state. Polymer-clay fluid for wells drilling in permafrost rocks doesn't freeze at negative temperatures and comprises clay, stabilizing agent as a mixture of polysaccharide reagent and structure-forming agent, hydrocarbon antifreeze and water. As a polysaccharide reagent the polymer-clay fluid comprises Acinetobacter sp. biopolymer, and as a structure-forming agent it comprises condensed sulfite-alcohol distillery grains in the following ratio of components, wt.-%: clay, 6-8; condensed sulfite-alcohol distillery grains, 4-6; Acinetobacter sp. biopolymer, 2-4; hydrocarbon antifreeze, 7-19, and water, the balance, wherein the ratio of Acinetobacter sp. biopolymer and condensed sulfite-alcohol distillery grain = 1:(1-3) mas. p., respectively. As hydrocarbon antifreeze, polymer-clay fluid comprises carbamide or glycerol. Invention provides enhancing effectiveness in drilling of wells in permafrost rocks.

EFFECT: improved properties of polymer-clay fluid.

2 cl, 15 ex

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EFFECT: increased efficiency, possibility to kill wells characterized by abnormally high permeability of production bed and high gas factor.

2 cl, 1 ex

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