density of barite in ppg - newthingsnewtech.com,however, along with barite, hematite was added to the obf (11 ppg) or wbf (8.6 ppg) samples to get a density of 12.5, 14.5, and 16.5 ppg. a barite-weighted drilling fluid, with a density of 15 ppg, was used with the main drilling fluid additives..chapter three: drilling fluids | engineering360,example: determine the number of sacks of barite required to increase the density of 100bbl of 12.0ppg (w 1) mud to 14.0ppg (w 2): barite = 140 sk/100 bbl. metric calculation.
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Ρ b = barite density = 35.82 ppg v o = original mud volume v b = barite volume wt b = barite weight nb: specific gravity of barite = 4.3. test procedure. calculate and list the amount of barite required to increase the density of each batch from 8.6 ppg to 9, 10, 11 and 12 ppg. obtain 400 cc of original base mud (density 8.6) add the calculated amount of barite to each batch, stir for about 2
the effectiveness of a barite plug derives from the high density and fine particle size of the barite and its ability to form a tough impermeable barrier. a barite plug has the following advantages: the slurry has a high density (19.0 - 22.0 ppg) it can be pumped through the bit and offers a reasonable chance of recovering the drillstring
f vo + vb pb -p f where pf = final mud density po = original mud density pb = barite density = 35.82 ppg vo = original mud volume vb = barite volume
the volume of barite is the density (4.2 g/cc) divided by the weight of barite. 2. the volume of low-gravity solids is the total volume of dry solids minus the volume of barite.
however, the quantity of barite that is needed as a weighting agent can be given using the following formula: (1) weighting agent = 1490 (w 2 − w 1) 35 − w 2 where, w 1 is the initial weight (ppg) and w 2 is the final required weight (ppg).
calculated density ppg measured density ppg 600 rpm reading deg 300 rpm reading from pge 430 at university of texas
assuming an average density for barite of 35. 4 ppg (4.25 sp.gr.) then a barrel of barite weighs 35.4 x 42 or 1490 lbs. barite for oil field applications is packaged in 100 lb sacks. therefore, if v1 is 100 bbls and wb is 35.4 ppg, then sacks of barite / 100 bbl of mud = [1490 (w2 – w1)] / (35.4 – w2) example-1 how much barite is required to increase the density of 300 bbls of mud from 4 ppg to 15 ppg.
take readings in ppg, sg, lb/ft3, psi/1000ft ; procedures (sample 2) measure 10g of barite on the weighing balance ; add the 10g of barite to the prepared sample 1 ; put it into the mixer to mix the homogeneous mixture ; pour the mixture of sample 2 into the 4 scale mud balance cup until it is full ; cover the cup with the lid
in the oil industry, mud weight is the density of the drilling fluid and is normally measured in pounds per gallon (lb/gal) (ppg) or pound cubic feet (pcf) . in the field it is measured using a mud scale or mud balance. mud can weigh up to 22 or 23 ppg. a gallon of water typically weighs 8.33 pounds. in conventional drilling fluids, barite is used
mud density : the full range of mud weight tests (11.6-16.0 ppg) showed sagging. the mud weight did not significantly affect the degree of sag in the mud weight range investigated. most problematic wells to date have occurred with a mud weight of over 13 ppg. hole angle : sag has been shown to occur at any angle between 30 and 90 degrees.
mud density ppg lb/ft3 s.g psi/1000ft sample 1 (water and bentonite) 8.7651.04450sample 2 (with barite, water and bentonite) 8.966.551.11460.05 conclusion at the end of this experiment, i have come to the conclusion that this method is very accurate in the measurement of mud density and also barite can be used to increase mud density.
f) mass rate for api barite: where : mw = mud density into centrifuge, ppg pu qm = mud volume into centrifuge, gal/m pw = qw = dilution water volume, gal/mm po =
density is the mass of material per unit volume. specific gravity is a ratio of the mass of a material to the mass of an equal volume of water at 4 o c. because specific gravity is a ratio, it is a unitless quantity. for example, the specific gravity of water at 4 o c is 1.0 while its density is 1.0 gcm -3.
the density can be adjusted with soluble salts or by addition of solids, termed weight material (for example, barite is added to the mud to increase the density). density values can be expressed as one of the following: ppg = pounds per gallon (united states) s.g. = specific gravity (dimensionless) (international)
compute the volume in bbl and density in ppg of mud composed of 20 ibm of quikgel , 45 ibm of barite and 1 bbl of fresh water.
barite sk/100 bbls = 1470 x (mw2 - mw1) 35 – mw2 barite sk = 100 lbs barite sg = 4.2 gm/cc water sg = 1.0 gm/cc barite sg x 8.33 ppg = 35 ppg volume increase per 100 bbs = 100 x (mw2 - mw1) 35 – mw2 158 sks 10.8 bbls
the ph of 19.2 ppg stock zinc-calcium bromide brine is about 1 – 1.5. by ‘rule of thumb’, the ph of a lower density blend of zinc bromide is approximately proportional to the volume fraction of 19.2 ppg fluid in the blend, i.e., a 17.15 ppg blend of 19.2 ppg zn-cabr 2 and 15.1 ppg cacl 2 -br 2 should have a ph equal to about 3.5.
b) density control additives. barite (barium sulphate, baso4) is the primary weighting material used in muds. densities of 9 ppg to 19 ppg can be achieved by mixing water, clay and barite. the api specification for barite is shown in table 5. other weighting materials are calcium carbonate and galena (lead sulphide).
¾ high gravity are added to increase mud weight or density ¾ referred to as weighting materials ¾ mud named as weighted mud, they are: barite (barium sulphate, baso4) sp.gr. 4.2 ¾ used to prepare mud in excess of 10 ppg ¾ referred to as weighting agent for low cost and
brine density, ppg; vol % brine; vol % corrected solids; a s g of solids % low gravity solids; low gravity solids, ppb % high gravity solids; high gravity solids, ppb; oil ratio*** water (h20) ratio*** oil ratio (oil to brine) water/brine ratio (oil to brine)
this gives the paper a very high density that allows the cards to be 'dealt' easily to players around a card table. barite is used as a weighting filler in rubber to make 'anti-sail' mudflaps for trucks. barite is the primary ore of barium, which is used to make a wide variety of barium compounds. some of these are used for x-ray shielding.
occurrences of barite sag have been observed over a relatively wide range of fluid densities from 11.7 to 20.0 ppg with weight variations as much as ±4.0 ppg exhibited in the flowline. further, barite settling can occur under static or circulating conditions, or under both, and is affected by mud density, rheological properties, temperature, hole angle, size of suspended solids, and other
in the second set, obf at the original density of 11 ppg and the wbf raised up to 11 ppg using barite were used. both sets of 8.6 ppg and 11 ppg drilling fluids were treated with three different formulations of lcm before being tested in the hpa.
a symptom of barite sag would be when density checks at the shakers, see a drop in density, followed by an increase, to be then followed eventually, by mud weight of the correct density. this idealized cycle of mud weights seen at the shale shakers may not bee seen as it could be masked by new barite