Product Bulletin
VERSAMOD VERSAMOD organic gelling agent is a liquid rheology modifier used
in VERSADRIL and VERSACLEAN oil-base mud systems. It increases
Low-Shear-Rate Viscosities (LSRV) and gel strengths for improved
hole cleaning. The primary application for VERSAMOD is in large-
diameter, high-angle, horizontal and extended-reach wells to
increase cuttings-carrying capacity. This permits higher rates of
penetration while maintaining wellbore stability. VERSAMOD, when
used at proper concentrations, produces the highly shear-thinning
rheological profile found in VERSAPORT oil mud systems.
. . . . . . . . . . . .
Physical appearance Amber viscous liquid
TYPICAL PHYSICAL Specific gravity . . . . . . . . . . . . . . . . 0.908
PROPERTIES Flash point . . . . . . . . . . . . . . . . . . . 175掳F (79.4掳C) (PMCC)
Pour point . . . . . . . . . . . . . . . . . . . . 35掳F (1.7掳C)
VERSAMOD is used to improve cut- with higher brine contents. Typical
tings transport in large-diameter or initial treatments are 1 to 2 lb/bbl
APPLICATIONS
directional wells, especially wells (2.85 to 5.7 kg/m3) for muds with
with diameters greater than 81鈦?2 in. oil:water ratios in the 75:25 to 85:15
or deviations greater than 25掳. It range; above 85:15 the effectiveness
modifies the rheological profile of is diminished. Pilot testing is recom-
oil-base muds, increasing their mended to determine the actual
shear-thinning and thixotropic treatment required to obtain the
characteristics without using desired result.
additional clay-base additives. VERSAMOD is activated by calcium,
VERSAMOD can be used in existing shear and temperature. Generally,
VERSADRIL and VERSACLEAN systems, 1 lb/bbl (2.85 kg/m3) lime should
as well as in freshly prepared mud, be added and maintained for every
to increase LSRV and gel strengths. 1 lb/bbl (2.85 kg/m3) VERSAMOD used
Sufficient shear is required to develop in a system. VERSAMOD will not be
this increase in rheology, especially fully activated by the shear and tem-
in freshly prepared muds. perature exposure in a mixing plant
Normal concentrations range from or mud pit, care should be taken not
1 to 4 lb/bbl (2.85 to 11.4 kg/m3), to overtreat with VERSAMOD until the
depending on the brine content. fluid is actually circulated through
Less VERSAMOD is needed in muds the well.
鈥? Improves the rheological profile 鈥? Can be used in existing systems
and hole cleaning capacity of or in freshly prepared mud.
ADVANTAGES
VERSADRIL and VERSACLEAN systems. 鈥? Rheological modifications
鈥? Produces a more shear-thinning achieved with VERSAMOD are
rheology profile as compared to reversible with treatments of
alternative oil mud gelling agents. VERSATHIN in all systems, or with
鈥? Increases LSRV and gel strengths VERSACOAT in VERSACLEAN systems.
with minimal yield point and 鈥? After initial VERSAMOD additions,
plastic viscosity changes; gels tend daily maintenance treatments are
to be fragile and non-progressive. very low.
鈥? Becomes less effective as the 鈥? VERSAMOD is activated by shear and
oil:water ratio rises above 85:15. temperature. It does not generate
LIMITATIONS
Above this level, increased con- significant viscosity at the mixing
centrations of VERSAMOD will be plant or mud pits until the fluid is
needed for the desired rheological actually circulated through the
properties. Low-brine-content well. VERSA-HRP should be used to
muds which use high concentra- viscosify fluids at mixing plants
tions of VERSAMOD will become for transportation to the wellsite.
extremely viscous if the water
content is increased, as with a
saltwater flow.
Bioassay information is available fluids should be considered, since
TOXICITY upon request. VERSAMOD is used in conjunction
AND HANDLING Handle as an industrial chemical, with oil.
wearing protective equipment CAUTION! Avoid exposure. VERSAMOD
and observing the precautions as contains mineral oil which is an irritant
described on the Transportation and to eyes, skin and respiratory system.
Material Safety Data Sheet (MSDS).
Environmental restrictions con-
cerning the use of oils and oil-base
VERSAMOD is packaged in 55-gal
PACKAGING (208.2-l) drums and 5-gal (18.9-l) cans.
AND STORAGE Store in a location away from
sources of heat or ignition. Keep
containers closed and tightly sealed.
P.O. Box 721110
Houston, Texas 77272-1110
Tel: 281路561路1300
Fax: 281路561路7240
漏1996 M-I Drilling Fluids L.L.C. All rights reserved.
鈩? VERSAMOD and VERSAPORT are trademarks of M-I Drilling Fluids L.L.C.
http://www.midf.com
庐 VERSADRIL, VERSACLEAN, VERSATHIN, VERSACOAT and VERSA-HRP are registered trademarks of M-I Drilling Fluids L.L.C.
E-mail: mimud@midfre.com
MI-12205 1M 7/97 Litho in U.S.A.
|