SY/T 5233-1991 Evaluation procedure for flocculants used in drilling fluids
Some standard content:
SY/T5233-91, Petroleum and Natural Gas Industry Standard of the People's Republic of China
Evaluation Procedures for Flocculants Used in Drilling Fluids
Published on July 19, 1991
Ministry of Energy of the People's Republic of China
Implemented on November 1, 1991
Petroleum and Natural Gas Industry Standard of the People's Republic of China Evaluation Procedures for Flocculants Used in Drilling Fluids
1 Subject Content and Scope of Application
This standard specifies the evaluation items and analysis methods for water-based flocculants used in drilling fluids. This standard is applicable to the laboratory evaluation of the flocculation ability of water-based flocculants used in drilling fluids. 2 Symbols and Units
a, flocculation time, expressed in seconds. b, loss: expressed in F, in milliliters. 3 Determination of flocculation time
SY/T 5233—91
Instruments and materials
Measuring cylinder with stopper: 250ml, total height 400±5mm, inner diameter 40±1mm, space height above the scale 88±10mm, balance, sensitivity 0.01g
Stopwatch: sensitivity 0.Is;
Beaker: 50ml
Pipette:
Kaolin powder: chemically pure, fineness is 0.074mm aperture sieve, sieve residue is less than 10%, distilled water.
3.2 Test Procedure LibrarywwW.bzxz.Net
3.2.1 On the 250ml measuring tube, stick a strip of 1mm square paper, align the "o" line of the strip with the 250ml scale line of the measuring tube, and then mark the scale from "0" downwards, so that a downcomer with reading from top to bottom is obtained. 3.2.2 At room temperature (24±3°C), add 200ml of distilled water and 30g of commercial soil powder to the measuring tube with the square paper strip and scale, shake and mix evenly, and immediately add 1.00g of the pre-prepared flocculant solution with a concentration of 1,000g/100ml. Weighing adopts the difference subtraction method, that is, put 5~10g of flocculant solution with a concentration of 1.00g/100ml into a 50ml beaker, and weigh it together with a clean dropper on the balance, then reduce the weight on the balance to 100g, and then use the dropper to drip the solution into the stoppered volume, one drop at a time, and put the dropper back into the beaker until the balance is positive (automatic display electronic balance can also be used). After weighing, add distilled water to a total volume of 250ml (the \0\ degree line of the graph paper). 3.2.3 Mix for 1 min at a frequency of 30 inverted and upright times per minute (one inverted and one upright counts as 2 times). Then let it stand and start a stopwatch at the same time, recording the sedimentation scale H (the scale numbers on the graph paper) of the condensate interface at 10, 20, 30, 40, 60 s and 1, 1.5, 2, 2.5, 3, 3.5, 4, 6...15 mm, and finally the scale Hm1x3.2.4 On a logarithmic coordinate paper, draw a sedimentation curve with the sedimentation time (1 g) as the ordinate and the interface scale H as the abscissa. Find the interval corresponding to (1/2)H on the graph and record it as ti/. Approved by the Ministry of Energy of the People's Republic of China on July 19, 1891 and implemented on November 1, 1991
SY/T 5233--91
4 Experimental effect of flocculants on bentonite filtration loss 4.1 Instruments and materials
a. High-speed agitator: under load, the speed is 11000~300r/min, the agitator shaft is equipped with a single corrugated plate with a diameter of 2.5cm and a mass of 5.5g; the instrument is equipped with a sample cup with a cup height of 18cm, an upper diameter of 9.7cm and a lower diameter of 7.0cm, made of stainless steel or corrosion-resistant material:
b. Medium-pressure filter loss meter at room temperature: including filter press, bracket, gasket and pressure source; filter press capacity is 300-400ml, diameter is 76.2mm, height is greater than 64.0mm, filtration area is 4580±60mm\Filter paper: Whatman 50 type or equivalent products, c.
Stopwatch: sensitivity is 0.1s#
Graduated measuring stick: capacity is 10-25ml, graduation value is 0.2ml; f. Balance: sensitivity is o.1g:
9: Bentonite powder: conforms to the second-grade bentonite in the standard SY5060 "Bentonite for drilling fluid", h
Sodium thiocarbate: chemical absolute.
4.2 Test procedure
4,2,1 Add 22.4g bentonite powder (if it is calcium bentonite, 5% sodium carbonate should be added to make it meet the SY5060 second-grade soil standard) and 350ml of distilled water to three high-reverse stirring sample cups respectively, stir at high speed for 20 minutes on a high-speed stirrer, stop at least twice in the middle to let the bentonite attached to the container, seal and maintain for 24 hours at room temperature (24±3\C), which is the basic tightness. Use a pressure filter loss instrument to measure the filtration oxygen loss of one part at a pressure of 690kPa (6.81atm) for 30 minutes. 4.2.2 Add 7.0g (total concentration 200mg/1) and 4.0g (total liquid 400mg/1) of 1% coagulant solution to the other two small portions of base slurry, stir at high speed for 5 minutes on a high-speed stirrer, and use a pressure filter loss meter to measure the filtration loss in 30 minutes when the pressure is 690kPa.
5 Evaluation results
Fill in the coagulation time and filtration loss obtained from the test into the evaluation report. The evaluation report format is shown in Appendix A (Supplement). Entrusting unit,
Sample number:
Manufacturer name:
Sampling date:
Code:
Chemical name,
Main technical specifications:
Review,
Additional instructions,
SY/T5233--91
Appendix A
Evaluation report format of flocculant for drilling fluid
(Supplementary )
Evaluation report of flocculants for drilling fluids
Report number:
Date of sample receipt,
Test date:
Sample taker,
Flocculation time t1/2,s
Content of compacting agent 200mg/1
Content of flocculant 400mg/1
Analyst:
This standard is proposed by China National Petroleum Corporation.
This standard is under the technical jurisdiction of the Drilling and Research Institute of Petroleum Exploration and Development Research Institute. This standard was drafted by the Oilfield Chemical Application Research Laboratory of Shandong University. The main drafters were Zhang Chunguang, Hou Wanguo, Wang Guoting and Yue Qinyan. Conclusion
This standard is still valid after the review in 1999, and the review result has been approved by the State Administration of Petroleum and Chemical Industry.
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