WH-5 is made of multiple high active surface active agents wetting reversal agent, organic solvent and others auxiliary agents.
WH-5 has a strong infiltration and infiltration of the drilling process,and permeates in the wall of mud cake quickly, then mud cake will be spread out erosion, thereby to enhance the water slurry and the contact surface of the cement capacity.
WH-5 has strong wash oil property, can effectively remove, displace well petroleum phase material, and turn a well’s pro-oil interface to the hydrophilic interface, thereby to enhance the capacity of cement slurry.
WH-5 has good compatibility with oil-base mud.
| Items |
Specification |
| Appearance |
Transparent liquid |
| PH |
7.0 ～ 10.0 |
| Density, g/cm³ |
0.98 ～ 1.04 |
Table 2 Formula of flushing fluid
| Name |
Specification |
Content, g |
Ratio |
| Water |
Hot water ( 50℃ ) |
600 |
100 |
| Flushing fluid |
WH-5 |
60 |
10 |
Table 3 Cleaning effect of flushing fluid
| Items |
Test condition |
Specification |
| Flushing efficiency ( 10min ), % |
Fan viscosimeter outer barrel dipped in crude oil, speed: 300 r/min,
solution temperature: ≥ 38℃ |
≥ 80.0 |
The evaluation of flushing efficiency is tested with the used oil-based mud and temperature.
WH-5 is diluted to 2 ~ 50% aqueous solution.The flushing fluid dosage of each well is designed according to the annular height of 300 meters, and can be formulated according to the actual well cementing design.
