BJ
Services introduces new well cleaning system
Posted: 27 May 2004
BJ Services announced the introduction of the BJ Well Cleaning
System, a new system that removes thin, low-permeable filter cake
consisting of lost circulations materials, emulsions and other unwanted
materials that can have adverse effects on the complete recovery
of drilling and completion fluids and the environment. The cleaning
system removes mineral oils, organic oils and thread compounds,
as well as chemical residue, leaving a clean water wet metal surface.
By using BJ’s cleaning system, operators can prevent the wellbore
from becoming lined with debris that can rob a well of much of its
production capability.
System saves hours of circulating downtime
The system saves hours of circulating downtime, completion fluid
filtration and fishing problems. One added benefit is that because
there are minimum contaminants, such as formation fines and emulsions
for drilling mud particles, there is little formation damage.
Suite of wellbore clean-up tools used in conjunction with
BJ Well Wash
The BJ Well Cleaning System is comprised of a unique suite of four
mechanical wellbore clean-up tools that are designed to clean casing,
and remove debris from the well during clean-up operations. To achieve
optimum results, the BJ Well Cleaning System is typically used in
conjunction with BJ’s Well Wash™ displacement chemicals
to ensure that the fluid system is as clean as possible.
The first component of the Well Cleaning System is the BJ Fluid-actuated
Circulating Sub/Riser Jetting Tool, a multiple activation tool that
facilitates increased annular velocities during well clean-up and
displacement operations. The jetting/washing action of the tool
ensures that sufficient fluid velocity in large annular areas above
liner tops or casing size changes to efficiently remove drilling
fluid material and particulate debris from the well.
Designed to scrape the casing wall and remove cement mud, scale,
paraffin and other debris during displacement operations is the
BJ TruGage Casing Scraper. With its 360º coverage, it is also
ideal for use when drilling out bridge plugs and removing casing
burrs during drilling operations.
The BJ Downhole Debris Filter (DDF) essentially vacuums foreign
material from the wellbore during displacement completion, fishing,
milling and workover operations. By using this tool, a clean fluid
environment is ensured without fear of metal or other solid objects
being left behind to damage downhole assemblies. The field-proven
DDF features a unique internal debris filter and retention chamber
to trap material circulated from the wellbore. This tool provides
reverse circulation in the bottomhole tool area while pumping down
the inside of the tubing. No additional time is required to reverse
from the surface.
The final element of the BJ Well Cleaning System is the RuffPup,
a casing brush tool that features the Brislock System. The RuffPup
is a mechanical wellbore clean-up device that cleans the inside
of casing during displacement operations. For optimal results –
particularly in highly deviated wells – the tool features
interchangeable, self-centralizing full-gauge stabilizers to promote
proper and equal pressure of the brush sleeve on well tubulars.
Its special alloy bristle sleeve and heavy-duty API tool-steel
body is designed to ensure 360º coverage in the casing at all
times. Hardened and tempered spring-steel bristles are attached
to the alloy sleeve by the patented Brislock system. Named for its
ability to lock the bristles into place, it virtually eliminates
the possibility of detaching during downhole operations. Optimum
length, density and stiffness are assured to resist deformation
and wear.
Well Cleaning System Achieves Results in Gulf of Mexico
and Norway
To date, BJ’s Well Cleaning System has been extremely successful.
“We have carried out a number of wellbore clean-up operations
using the Well Cleaning System in conjunction with our Well Wash
displacement chemicals in the United States and Norway,” said
Paul van Laar, completion fluids manager - United Kingdom for BJ
Services. “We recently introduced the system to the European
market, and have utilised the system very successfully in Norway
on behalf of Statoil,” he added.
BJ Services Company is a leading provider of pressure pumping and
related oilfield services to the petroleum industry. The company
operates in every major oil and gas producing region.
For more information see www.bjservices.com
Posted by Richard Price,
Editor Pipeline Magazine
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