English
Main ingredients
The unidirectional sealing agent for drilling fluid is a gray yellow powder product composed of various natural fibers, filling particles, and additives processed by special processes, combined with appropriate gradation and certain processes.
Nature and Use
This product is a light yellow or grayish yellow powder. Suitable for filtration of porous and micro fractured formations in different situations during drilling. After being added in drilling, under the action of one-way pressure difference, it can effectively seal various leaks in the formation, which is convenient to use, has good compatibility, and does not affect the mud performance.
Specification
|
Project |
Indicators |
|
Appearance |
Light yellow or grayish yellow powder |
|
Density，g/cm3 |
1.45～1.65 |
|
Ignition residue，% |
≤7.0 |
|
Screen residue（0.25 mm），% |
≤10.0 |
|
Drying loss，% |
≤10.0 |
|
pH value |
6～8 |
|
Apparent viscosity，mPa·s |
6～9 |
|
Reduction rate of closed filtration loss，% |
≥70 |
Product features
Usage
Recommended dosage: (volume ratio)
The general dosage is 3.0-5.0%. Users can increase or decrease the amount of additives according to the actual situation on site.
