API 13 A SECTION – 11(OCMA)

Sr. No.	Parameters		API 13 A SECTION-11 (OCMA)
1	Viscometer dial reading at 600 rpm		30 min
2	YP / PV Ratio		6 max
3	API Fluid Loss		16 ml max
4	Residue > 75 μm		2.5% max
5	Moisture Content		13% max
Name of Drilling Grades		Abbreviations of Drilling Grades
API 13 A SECTION 11		Oil Company Material Association ( OCMA ) Bentonite

Advantage:

§  Bentonite extracts the drill cutting from around the bit which is then floated to the surface.

§  Bentonite seals the drill hole against seepage and prevents wall cavities and leakages.

§  Bentonite (Drilling mud) served to cool and lubricate the drill bit.

§  Bentonite form slurry with leakages that is pumped through drill stem and out through drill bit.

Applications:

§  Drilling mud (gel) is crucial in the extraction of drill cutting during the drilling processes.

§  Drilling mud (gel) is a major component in well drilling process.

§  Another conventional use of bentonite is as a mud constituent for oil and water well drilling. Its roles are mainly to seal the borehole walls, to remove drill cuttings and to lubricate the cutting head.

Note:

§  All the test carried out as per IS Standard.