OS WELL CLEAN II - Speciality Well Cleaning Agent

Well Bore Cleaning

It is essential once the drilling phase has been completed that the well bore is as clean as is practically possible before committing solids free completion fluids to the well and running testing and completion tools. Mechanical cleaning and scraping must always be complimented with vigorous chemical action. The combination of a solvent and surfactant is essential to maximize wellbore cleaning.

Product Information 

OS WELL CLEAN II is a combination of sequestrant and emulsifier best used in conjunction with OS WELL CLEAN I.

Typical Physical Properties 

Appearance   -   Clear colourless liquid                     

S.G @ 20°C   -   1.10

Solubility in water   -   100%                                         

pH   -   8 – 9

Viscosity @ 20°C   -   < 1000 cps

Advantages   

Easily mixed.

Both OS WELL CLEAN I and OS WELL CLEAN II are highly concentrated thus giving better performance.

Application   

The following quantities are guidelines only. Depending on conditions the product can be further diluted. The requirement for casing being clean is that turbidity readings of the return fluid is < 100 NTU. Cleaning is maintained until the turbidity drops to acceptable levels.

Composition of 1 m3 casing cleaning fluid:

A normal procedure is to pump trains of well cleaner into the well. This is the most effective way of cleaning. An example of such a procedure may be to pump in turn viscous spacer, deoxygenated sea water and casing cleaning fluid. Typical fluid amounts are 5 – 15 m3. The process is repeated several times until turbidity values are low enough.

Packaging

OS WELL CLEAN I is packaged in 200 kg net drums.