Tight Urban Directional Drilling

Special Equipment In Restricted Space Aids Project
By Jeff Griffin, Senior Editor | April 2011 Vol. 66 No. 4

Drilling conditions were good, Poage said, in soil consisting mostly of clay with some sand. After completion, each pilot bore was enlarged with 22- and 36-reamer passes and then swabbed.

Eight- and four-inch HDPE pipe was fused and bundled for pullback.

“Because of space limitations to layout the assembled bundles,” we had to get creative,” said Boyer’s Adams. On the first 1,830-foot run, we pulled around two 90-degree turns, three 90-degree turns on the second.” Pullbacks required one day.

Pipe handling
On this project, Laney used for the first time a LeValley Industries Deckhand pipe handling system for drill stem during both drilling and pullback operations. Deckhand components mount to the hydraulic and electrical systems of various-size excavators in using quick-connect couplers.

Deckhand components include upper and lower heads with mounting beam and interchangeable grab arms. Deckhand is operated using excavator controls. A display panel allows the operator to monitor and adjust all functions. The three interchangeable grab arms securely lift, lower, tilt and rotate pipe a full 360 degrees, giving operators the versatility to handle pipe in multiple working angles. A display panel allows operators to monitor and adjust all functions, pressures and flows from inside the cab.

Poage said on the CenterPoint project, Deckhand was mounted on a Caterpillar 325 excavator and reduced the time and labor for adding and removing drill stem.
“The Deckhand will provide safety and cost benefits for any HDD project,” said Poage.

Boyer Inc. specializes in rehabilitation and replacement of utility infrastructure and has the capabilities to self-perform more than 95 percent of the projects in which it is involved. In addition, Boyer performs many types of civil construction, inland marine construction, instrumentation and control systems, equipment sales and rental, and landscape and irrigation construction.

Laney Directional Drilling celebrated its 20th anniversary in 2009 and today offers HDD capabilities of installing pipe in diameters of four to 60 inches to distances of more than 7,000 feet. Laney uses drill rigs of its own design and construction and today operates 12 HDD units ranging in size from 300,000 to 1.7 million pounds of pullback.