Polymer Based Mud Thinner

The company announces its need for supply of Polymeric Deflocculant.

1. Physical State : The polymer should be in the from of white free flowing,dust free microbeads/liquid miscible with water.
2. Dispersibility : Should be easily dispersible in water.
3. Particle Size : 100% through 20 mesh ASTM or equivalent.
4.Specific gravity : 1.15 (in case of liquid)
5.PH of sample :8.0 (in case of liquid)
6.Performance Test in :
A.Fresh Water mud :
(i)Preparation of base mud. Prepare a 10 % (w/v) bentonite suspension in distilled water using OIL approved bentonite and stir in multimixer for 15 minutes so that no lumps are left after the mixing period. Age the
suspension at 90 +/- 2 DegC for 72 hrs.Cool the suspension and stir for 15 minutes in multimixer. Adjust apparent viscosity of the suspension to 52.5 +/- 205 cp by dilution with distilled water, if necessary.

(ii) Preparation of treated mud. Treat the base mud 6A(i) with 0.15 % (w/v) of polymeric deflocculant sample and adjust the PH to around 8.5 by 1 N NaOH solution. Stir for 30 minutes in multimixer. Measure apparent viscosity.yield point and 15 min. gel in a Fann VG meter at 26 +/- 2 DegC which should be as under:
(a)Apparent viscosity . cd max. : 10.
(b) Yield value. 1b /100 ftsq,max. :15.
(c) 15 minute gel. 1b/100 ftsq max. :10 Age this mud at 160 +/- 2 DegC for 16 hrs.in rolling condition. Cool the mud and stir for 15 minutes in a multimixer. Adjust
the PH at 8.5 if necessary. Determine apparent viscosity.yield value and 15 min.gel at 26+/- 2 DegC which should be as follows.
(a)Apparent viscosity, cp. max : 10.
(b)Yield value, 1b/100 ftsq, max :15.
(c)15 min. gel, 1b/100 ftsq, max :10.
Age this mud at 160 +/-2 Deg C for 16 hrs.in rolling condition. Cool the mud and stir for 15 minutes in a multimixer. Adjust the PH at 8.5 if necessary. Determine apparent viscosity,yield value and 15 min.gel at 26+/-2 DegC which should be as follows:
(a) Apparent viscosity,cp max.:25.
(b) Yield value,lb/100 ftsq,max :15.
(c) 15 min.gel,lb/100 ftsq,max : 10.

B. Saline Water Mud :
(i) Preparation of base mud. Prepare a 10 (w/v)bentonite suspension in distilled water using OIL approved bentonite and stir the suspension in a multimixer for 15 minutes so that no lumps are left after the stirring
period. Age the suspension for 72 hrs at 90 DegC. Cool the suspension and stir in a multimixer for 15 minutes. Adjust the apparent viscosity to 52.5 +/- 2.5 cp with distilled water, if necessary. Add 4% Nacl (LR grade)
to it and stir again for 15 minutes. Age the salt treated mud at 26 +/- 2 DegC which should be as follows.
(a) Apparent viscosity, cp max, : 20.
(b) Yield point. 1b/100 ftsq. max. :25.
(c) 15 min.gel. 1b/100 ftsq. max :30.
Age this mud at 160 +/- 2 DgeC for 16 hrs. in rolling condition. Cool and stir in multimixer for 15 minutes. Determine apparent viscosity. yield value and 15 min. gel of the salt treated mud at 26+- 2 DegC which should be as under.
(a) Apparent Visc. cp : Should not be more than that of 4B(ii.a).
(b) Yield value. : 1b/100 ftsq. Should not be more than that of 4B(ii.b).
(c) 15 min. gel :1b/100 ftsq : Should not be more than that of 4B(ii.c).