Casing Equipment Catalog Sec 13_Foam Wiping ... - Halliburton

Plug Setting Aid System
The plug setting aid system combines the field proven BHKA
disconnect assembly and sacrificial tubing plug cementing
operations with two new products: the drillable tail pipe
centralizer and the centralizer diverter shoe. These items,
when used together, help with setting a competent cement
plug in vertical, inclined, and horizontal wellbore conditions.
The drillable centralizer and centralizer diverter shoe help
centralize the sacrificial tubing by incorporating multiple
layers of flexible fabric belt diffusers that also direct the flow
of cement into the sacrificial tubing and wellbore annulus.
The diffusers are fully adjustable in size and flow pattern to
allow the “trapping” of a cement plug between the top of the
diverter shoe through the centralizers and up to the BHKA
disconnect tool. All of these items can be used together as a
system or separately to enhance cement plug setting
operations.
Drillable Tailpipe
Diverter
Drillable Tailpipe
Centralizer
Basic Operation of the PSA Concept
• Install centralized diverter shoe on end of tubing.
• Run the plug-setting tubing string to bottom.
• Sacrificial tubing string installed from bottom of where
cement plug is to be placed, up to desired top of cement
(TOC) and the tubing release point.
• TOC point to include another drillable centralizer.
– Note: Additional drillable tubing centralizers can be
used if required.
• BHKA-disconnect tool installed on top of upper most
drillable centralizer.
• Run in hole with standard retrievable work string tubing
to surface.
• Use Halliburton dart/ball-drop cementing head.
• While circulating, drop the diverter ball to activate the
drillable diverter and circulate clean the interval where
the cement plug will be set.
• Set the cement plug with the option of using a more
aggressive cement design because the tubing string will
not be removed.
– Higher viscosity/density.
– Faster set/gelling time.
– Higher lost circulation material (LCM) concentrations.
• Release displacement dart from surface and displace to
balance plug as calculated and until dart lands.
• Pressure up on tubing string and activate the disconnect,
then pull tubing up above top of plug for reverse out
option, or pull out of hole as pre-determined.
Top View of Drillable Tailpipe Diverter and Centralizer
Plug Setting Aids 13-12