CN1215075A

CN1215075A - Well-drilling liquid emulgent

Info

Publication number: CN1215075A
Application number: CN 98112983
Authority: CN
Inventors: 荣高翔
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-09-28
Filing date: 1998-09-28
Publication date: 1999-04-28
Anticipated expiration: 2018-09-28
Also published as: CN1072702C

Abstract

The drilling fluid emulsifier is prepared with base oil, lubricant, Span-80, alkylphenol ethoxylates, non-ionic polyacrylamide and alcohol. It is used in water-base slurry, an oil-in-water type emulsion is formed, and it is used in oil-base slurry, a water-in-oil type emulsion is formed, so that it can greatly reduce frictional resistance, raise bit life, reduce frequency of lifting drilling bit, shorten drilling period, reduce drilling cost and raise drilling efficiency. Besides, it possesses the advantages of easy preparation, low cost and small dose, and is suitable for adding in various drilling fluids.

Description

Well-drilling liquid emulgent

The invention belongs to the improvement of deep layer drilling well, relate to the fine chemical technology field with the emulsifying agent compound method of drilling fluid.

Drilling fluid also claims drilling mud, wellbore flushing liquid, is to be that major ingredient is formulated to bore native mud.In drilling process, it is with high pressure pump drive, by drilling rod, drill bit, return the annular space of water hole, the borehole wall and drilling rod, returns circulatory pool, recycles after purifying.That drilling fluid can be divided into is water base, oil base, three kinds of forms of bubble.In single cycle, drilling fluid can play and remove the shaft bottom rock dust, carries drilling cuttings, the action function of cooling drill bit, lubricated bit drilling tool, equilibrium strata pressure, the protection borehole wall.Studies show that, though drilling fluid have scarce can not effect, but the use of simple drilling fluid (water base magma) increases the frictional coefficient of drill bit and rock greatly, even the 2-3 that reaches the unlubricated friction coefficient doubly, the optimization of property of drilling fluid just influenced many problems such as drilling efficiency, drilling cost, bit life, working cycle thus, so can improve drilling efficiency and the accident that prevents takes place.People so that frictional coefficient reduces, improve drilling efficiency by add a spot of emulsifying agent in drilling fluid, facts have proved that this is an efficient ways.At present, the emulsifying agent of use has anticorrosive emulsified oil, Yatall MA, extreme emulsified oil, saponification dissolving oil and high-tech PHP etc.Though they respectively have advantage, bringing into play useful effect aborning, but still have deficiency, what have is restricted to drilling fluid matrix, use range is little, and the production cost height that has, usage quantity be big, cause the use cost height, and its common defective when being to use frictional coefficient fall lowly not enough, thereby to the raising of drilling efficiency not enough, limited the development of producing.

The objective of the invention is to propose a kind of well-drilling liquid emulgent and preparation method thereof, frictional coefficient is reduced again, drilling efficiency improves again, and the advantage that pair matrix is unrestricted, usage quantity is few, cost is low is arranged.

Well-drilling liquid emulgent that the present invention proposes and preparation method thereof is as follows.By producing 1 ton of product desired raw material and weight ratio be, get in diesel oil, machine oil, crude oil, the waste diesel one or more for base oil 150-350Kg, get oleic acid (sodium) 36-100Kg, hard acetic acid (sodium) 20-36Kg is a lubricant, sorbitan mono-oleic acid ester 6-18Kg, alkylphenol polyoxyethylene 18-40Kg, non-ionic polyacrylamide 15-190Kg, alcohol 1-14Kg, and the make up water of proper quantity of lye and surplus; Its preparation method is:

A. base oil is inserted in the reactor and to stir and be warming up to 85-100 ℃, after the adding sorbitan mono-oleic acid ester is waited to dissolve, add oleic acid (sodium) and hard ester acid (sodium) again to dissolving, mixture is inserted header tank, the required alkali lye of this mixture of neutralization is inserted in another header tank, Open valve makes two logistics go into the reactor internal reaction simultaneously, reactor temperature is not less than 85 ℃, and stir, require the inflow of two things to be no less than half an hour, and add simultaneously, add the back and continue constant temperature stirring four hours, place stand-by;

B. in another reactor, add excess water and be warming up to and boil, non-ionic polyacrylamide is evenly added with being not less than the halfhour time, require temperature to be not less than 85 ℃, be stirred to simultaneously fully and dissolve;

C. alkylphenol polyoxyethylene is added in a liquid, add alcohol again, keep 65-85 ℃ and stir; This liquid and b liquid are pumped into stirring preparation in the composite still simultaneously, and temperature is not less than 65 ℃, and the control feed rate added with the time that was not less than 1 hour, transferred PH to 8-9, can pack after the cooling.

The outward appearance of the well-drilling liquid emulgent of the present invention's preparation is milky white or milk yellow emulsion; Get final product through shaking up to unpack directly to pour in the circulatory pool during use, first add-on is 1-3%, keeps its content in recycling and is not less than 0.4%; If envrionment temperature is a paste when being lower than 15 ℃, need be heated into emulsion during use.

The well-drilling liquid emulgent of the present invention's preparation is the tensio-active agent between water base and oil-base mud, and it is added to the emulsion that then becomes the water-in-oil-in-water type in the water-based mud, and adding to then becomes water-in-oil oil-in emulsion in the oil-base mud; It uses in drilling well, can make the surface of drilling rod and rock all be formed with the active utmost point of one deck, and the non-polar end between the two has one deck oil film, thereby friction resistance is reduced greatly, even approaches the unlubricated friction coefficient; Use through reality, make drilling efficiency obviously improve (referring to accompanying drawing 1 and accompanying drawing 2), improve overall efficiency more than 20% than existing emulsifying agent.

Accompanying drawing 1 is emulsifying agent of the present invention and drilling well magma and existing emulsifying agent (high-tech PHP) drilling cost comparison sheet, and accompanying drawing 2 is emulsifying agent of the present invention and drilling well magma and existing emulsifying agent (high-tech PHP) drilling well work efficiency comparison sheet.

Below illustrate the enforcement and the use of technical solution of the present invention.

The present invention adopts oleic acid and the hard ester acid that lubricant adopts in the material to replace use with sodium oleate and sodium stearate respectively, and its alkali charge of replacing when using post neutralization will reduce, and to other did not influence.

Example 1. is got base oil 150Kg, oleic acid 36Kg, hard acetic acid 20Kg, sorbitan mono-oleic acid ester 6Kg, alkylphenol polyoxyethylene 18Kg, non-ionic polyacrylamide 15Kg, alcohol 1Kg, saturated sodium hydroxide lye 34Kg (wherein 3Kg is used for transferring at last PH), and the excess water of 700Kg is prepared about 1 ton emulsifier production by aforesaid method and requirement.When it used, first add-on was 3% of a drilling fluid, keeps content in recycling and is not less than 1%.

Example 2. is got base oil 240Kg, oleic acid 68Kg, hard ester acid 28Kg, sorbitan mono-oleic acid ester 12Kg, alkylphenol polyoxyethylene 28Kg, non-ionic polyacrylamide 100Kg, alcohol 10Kg, saturated sodium hydroxide lye 57Kg (wherein 4Kg is used to transfer PH), and the excess water of 450Kg reaches as stated above and requires to prepare about 1 ton emulsifier production.During use, first add-on is 2%, keeps content in the circulation and is not less than 0.7%.

Example 3. is got base oil 340Kg, oleic acid 100Kg, hard ester acid 36Kg, sorbitan mono-oleic acid ester 18Kg, alkylphenol polyoxyethylene 40Kg, non-ionic polyacrylamide 190Kg, alcohol 14Kg, saturated sodium hydroxide lye 80Kg (wherein 4Kg is used to transfer PH), and the excess water that reaches 200Kg reaches as stated above and requires to prepare about 1 ton emulsifier production.During use, first add-on is 1%, keeps content in the circulation and is not less than 0.4%.

Claims

1. well-drilling liquid emulgent, in raw material employing diesel oil, machine oil, crude oil, the waste diesel one or more are as base oil, with oleic acid (sodium) and hard ester acid (sodium) as lubricant, it is characterized in that, by the weight ratio of producing 1 ton of each raw material of product be, base oil 150-350Kg, oleic acid (sodium) 36-100Kg, hard ester acid (sodium) 20-36Kg, sorbitan mono-oleic acid ester 6-18Kg, alkylphenol polyoxyethylene 18-40Kg, non-ionic polyacrylamide 15-190Kg, alcohol 1-14Kg, and the make up water of proper quantity of lye and surplus; Its preparation method is:

B. in another reactor, add excess water and be warming up to and boil, non-ionic polyacrylamide is evenly added with being not less than the halfhour time, require temperature to be not less than 85 ℃, be stirred to simultaneously fully and dissolve,

C. alkylphenol polyoxyethylene is added in a liquid, add alcohol again, keep 65-85 ℃ and stir; This liquid and b liquid are pumped into stirring preparation in the composite still simultaneously, and temperature is not less than 65 ℃, and the control feed rate added with the time that is no less than 1 hour, transferred PH to 8-9, can pack after the cooling.

2. emulsifying agent according to claim 1 is characterized in that, the emulsifying agent of preparing is milky white or milk yellow emulsion, directly pours in the circulatory pool and can use, and first add-on is 1-3%, keeps its content in the use and is not less than 0.4%.