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ScalePROP, An Alternative to Scale-Inhibitor Squeezes
Scale-inhibitor squeezing is a
common technique for preventing scale deposition. These can be
expensive to perform, there's the initial shut-in period to
consider, and time before re-squeezing is needed can be short.
For hydraulic fracturing and packing treatments,
Schlumberger's ScalePROP is an alternative offering
longer-term protection. The key behind ScalePROP is a porous
ceramic proppant that can be impregnated with the optimum
amount of scale inhibitor (estimated considering the
anticipated volume of water and scaling tendencies).
The impregnated proppant is
deployed as a fraction (typically 5 to 25 percent) of the
total proppant. The impregnated proppant can be preblended
with conventional proppant before the job, or mixed on the fly
during the job. When produced water begins flowing through the
pack, scale inhibitor is slowly released. Unlike squeeze
treatments, there is no significant loss of chemical in the
early treatment stage. Scale inhibitor continues to be
released at low (yet sufficient) dosage to control deposition.
For further information
visit Schlumberger's website (www.
oilfield.slb.com/content/services/
stimulation/scale/scaleprop.asp)
where some North Sea case studies are presented.
Texas A&M Begins Hands-On Learning Program
In a new initiative to
strengthen hands-on instruction in drilling, completions, and
production, Texas A&M University is implementing a Technology
Partners Program. Initial sponsors are Cameron, Baker Hughes,
Halliburton, Lufkin Industries and Weatherford. The Program
will link students with technology and service providers,
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giving the students
opportunities to visit professional laboratories and well
sites, visit with working professionals on and off campus,
etc. Students will develop a "working" knowledge of the
industry, increasing the value of the technical knowledge they
later come to industry with.
See the Program website (http://
pumpjack.tamu.edu/Faculty&
Staff/faculty/scott/technology
partners/body.htm) for
more information. Additional sponsors ($7,500) are welcome.
Contact Dr. Stuart Scott (SLScott@tamu.edu)
for more information.
Weatherford's TorkWrenchTM, Bigger
Muscle in Smaller Size
Weatherford's new TorkWrenchTM
tong system is designed to fill a niche for equipment that can
handle 80,000 to 120,000 ft-lb of torque yet be small enough
to fit on the rig floor of small- to medium-size jackups and
larger land rigs. There are four positioning options: (1)
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handling frame with a portable
track setup, (2) a rotational column mounted on the rig floor
and an extension mechanism that moves the system to and from
the well center, (3) a PowerScopeŽ option that puts the system
on an extension arm that can be as far as 23 ft from the well
center, and (4) a MiniScope option that provides only
in-and-out operation but requires only minor rig
modifications.
Smaller size and ability to do
the job are important, but for operations requiring multiple
wrenching cycles the system can reduce time up to 50% due to
50° of rotation versus the 28° of rotation with typical
equipment complemented by a high-torque spinning wrench.
Excerpted from "TorkWrenchTM
Tong System from Weatherford Has Niche Market," AESC's Well
Servicing magazine, November/ December 2004, p. 24. Further
information from Weatherford's W Magazine (see page 5-ff,
www.
weatherford.com/weatherford/
groups/public/documents/
general/wft016133.pdf).
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Tech
Transfer Track