Special application powders
OCMA POWDER
OCMA bentonite powder is used to prepare drilling fluids complying with international quality standard ISO 13500.
OCMA bentonite specific surface is so large that microflakes contained in 1 kg of the product can cover about 70 football fields.
TECHNICAL CHARACTERISTICS OF OcMA BENTONITE POWDER:
| PROPERTIES | SLURRY PROPERTIES | |
| API specification requirements | Actual value | |
| Viscosimeter dial readings at 600 rpm | Min 30 | 32 – 35 |
| Yield point to plastic viscosity ratio | Max 6.0 | 4.0 to 5.9 |
| Filtrate volume, mL | Max 16.0 | 13,2 – 15,0 |
| Dry Screen Analysis (Residue of particles greater than 75 µm), % | Max 2.5 | 1,1 – 2,0 |
SPECIAL APPLICATION BENTONITE PBMA-EXTRA AND PBM-ETALON
Manufactured according to TU 08.12.22-19-41219638-2016 and TU 08.12.22-021-41219638-2017.
Advantages: used for preparing drilling fluid based on mineralized (including sea) and salt-saturated process water, does not require special water treatment.
PBMA-EXTRA
- has the ability to disperse in an aqueous phase with high ionic strength;
- is produced using natural raw materials without synthetic polymers and salts of heavy multi-charged cations;
- is used for drilling wells in deposits of rock salt and chemogenic rocks.
PBM-ETALON:
- ensures the stability of the well walls and reinforces them with a strong and elastic filter cake;
- is used as a mineral ultra-dispersed base for drilling fluids with unprecedentedly high structural-mechanical and rheological characteristics in combination with high stability;
- has an ultra-low filtration rate;
- used in various aggressive environments.
| Brand | PBMA-EXTRA | PBM-ETALON | |
| Slurry yield with viscosity of 15 mPa*s, m3/t, min | 25 | 30 | |
| Fann viscometer scale reading at 600 rpm for 6% mineralized water-based slurry | 50 g/L of NaCI, min | 30 | >30 |
| 300 g/L of СаСl2, min | 20 | 23 | |
| Filtration factor for 6% mineralized water-based suspension (50 g/L of NaCI), cm3/30 minutes, not exceeding | 18 | 12 | |
When using special bentonites, preparation of drilling fluid does not require water treatment (to soften the water).
PBMA-EXTRA and PBM-ETALON are successfully used both in oil and gas drilling, and also in construction. The key factor is the possibility of using bentonite at a reduced suspension concentration of 2–3%! When drilling engineering wells using the HDD method and performing other construction work, the use of bentonites of PBMA-EXTRA and PBM-ETALON brands allows replacing expensive mixtures and preserve the quality of the work performed.
The average consumption of PBMA-EXTRA bentonite for HDD drilling, depending on the type of soil, is 25–30 kg/m3, and the consumption of PBM-ETALON is 20–25 kg/m3. For example, preparation of a drilling fluid for HDD based on PBM-ETALON will take only 20 minutes, after which the specific funnel viscosity is 45 seconds. PBMA-EXTRA is compatible with any polymer reagents traditionally used in HDD to regulate the flush liquid properties, while PBM-ETALON does not require any additional treatment of the flush liquid, i.e. it is an “all-in-one-bag” mixture.