Qingdao Haitongyuanda Special Instrument Co.,Ltd.
Main Products:
No.10, Huaan Road, Chengyang district Qingdao City, Shandong Province, China
+86-87605018
1. Product Introduction of Electrical Stability Tester (EST) DWY-2A
China Haitongyuanda factory is a professional supplier and manutacturer of Electrical Stability Tester (EST) DWY-2A.The electrical stability tester is a portable instrument for measuring the electrical stability (ES) of oil-based drilling fluid. The electrical stability of drilling fluid is related to the stability and wettability of emulsion. The tester is in accordance with the electrical stability test procedure described in API rp13b-2 Recommended Practice for field testing of oil based drilling fluids.
The instrument is mainly composed of instrument box, test body, electrode, power adapter and glass beaker.
The electrical stability tester is a sine wave instrument, which is used to measure the relative electric strength of drilling fluid with continuous oil phase in conventional field and laboratory. It is accurate, simple and portable. The influence of chemical composition and shear history of drilling fluid on the absolute value of ES is very complex. Therefore, it is not advisable to interpret the oil wetting state of drilling fluid based on single measurement of es. When determining the treatment process of drilling fluid, only can use the change trend of ES.
2. Product Characteristic of Electrical Stability Tester (EST) DWY-2A
1) AC power plug to allow general operation of power supply requirements;
2) Power supply: 16V 4.5a (power adapter);
3) Auto calibration, real time performance check;
4) The monitor is large and easy to read.
3. Product Working principle of Electrical Stability Tester (EST) DWY-2A
The measurement of electrical stability (ES) is to apply a sinusoidal telecomunication signal with gradually rising voltage to a pair of parallel plate electrodes immersed in drilling fluid. The generated current is very weak until it reaches a critical voltage, and then the current intensity rises sharply. This critical voltage is called the ES value of the oil-based drilling fluid and is defined as the peak voltage measured at the current intensity of 61ua, unit is volts.
4. Product Models and Specifications of Electrical Stability Tester (EST) DWY-2A
| NO. | Name | Model |
| 1 | The Electrical Stability Tester | DWY-2A |
5. The Main Technical Parameters of Electrical Stability Tester (EST) DWY-2A
| No. | Item | Specifications |
| 1 | Power supply | 16V 4.5A (power adapter) |
| 2 | Range | 0V~2048V(Peak) |
| 3 | AC Frequency | 340Hz±2Hz |
| 4 | Output waveform | Sine wave |
| 5 | Pressure up speed | 150V/s±10V/s, Automatic boosting |
| 6 | Breakdown current | 61uA±5uA |
| 7 | Accuracy | ±5% |
| 8 | Operating ambient temperature | 18℃~26℃ (64.4°F~78.8°F) |
| 9 | Electrode test temperature range | 0℃~93℃ (32°F~199.4°F) |
| 10 | Storage temperature range | 5℃~50℃ (41°F~122°F) |
| 11 | Automatic power-off time | 1min |
| 12 | Peak voltage display | Digital LCD |
| 13 | Electrode spacing | 1.55mm (0.061in) |
| 14 | Net weight/Gross weight | 3/3.9kg |
| 15 | Dimensions | 360×260×175 (mm) |
| 16 | Packing dimensions (cardboard box) | 370×290×240 (mm) |
Our company is committed to the R&D and manufacturing of drilling fluid analyzer, oil well cement tester, oilfield laboratory integrated engineering solutions and experimental instrument maintenance services. Over the past 40 years, with the care and support of oilfield users, experts from various industries and engineers and technicians, our products and technologies have been tested by the market making. Haitongda special analytical instruments have grown to world-famous brands. Our company has researched and developed on testing instruments needed in unconventional oil and gas resources, deep water, natural gas hydrate and intelligent drilling, and successively produced a various of new products, such as ultra-HTHP rheometer, drilling fluid online testing system and deep water low temperature drilling fluid testing system, which timely met the needs of technological progress in the drilling industry. At present, we are providing quality services and practical products to more than 3000 customers in more than 20 countries and regions around the world.

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