was involved in the installation of three 2-mile long flow lines from shore to
a production platform located in Cook Inlet, Alaska.
The flow lines consisted of 6" and 8" pipe that was pulled from a
make-up yard onshore out to the platform and up through J-tubes to the sub
The shore approach was HDD bored
1500 feet instead of cut because of environmental concerns.
The tides were a maximum of 30 feet with
9-mile-per-hour currents allowing diver time to be limited to 10 minutes per 12
hours. Special underwater pulling
equipment that was diver friendly had to be designed and fabricated.
Also, a 200,000 pound capacity chain
jack had to be designed and fabricated to pull the flow lines through the J-tubes.
In addition to the offshore portion of the work,
BKW designed and fabricated pig traps on the land portion of the project.
became involved in the stabilization of a 36" pipeline located in Illinois and
The pipeline crossed several
miles of soil consisting of sugar sand and flotation became a problem.
BKW performed a soil survey using a Cat 330
backhoe and installed and tested anchors in the problem areas.
A coarse sand clay soil was encountered
below the sugar sand that provided good hold down for auger anchors.
As a result of the survey, several miles of
pipe were anchored using auger anchors instead of concrete
set-on weights, thus saving the pipeline company several million dollars.
Concrete Set-on Weights
BKW Auger Anchors
The auger anchors provide the Contractor with more flexibility than concrete set-on weights because set-on weights require a deeper and wider ditch. When the Contractor digs the ditch and it is determined stabilization is required, the Contractor must re-dig the ditch to accommodate set-on weights. If auger anchors are available, the Contractor can lay the pipe without re-digging and install auger anchors post lay. This flexibility, along with lower initial cost, will provide
the pipeline Company considerable cost savings.
This 12-Inch ANSI 600 Ball Launcher using the BKW
style rocker release system is located in Wyoming in
a gas gathering system. The rocker release system
on this job is automated with manual standby. The
manual standby consists of disconnecting the gas piston
from the rocker arm and using the rocker arm manually.
BKW also manufactures a pin system for ball release
or for vertical multiple pig launchers.