Directional boring costs $10 to $30 per linear foot or $1,000 to $9,000 total on average. Underground directional boring or horizontal directional drilling prices depend on the location and ground conditions.
[pdf] Directional drilling (or slant drilling) is the practice of drilling non-vertical . It can be broken down into four main groups: directional drilling, utility installation directional drilling, (horizontal directional drilling - HDD), and surface in seam (SIS), which horizontally intersects a vertical bore target to extract . Horizontal directional drilling bores underneath obstacles with a guided bit. The operator steers the bore head utilizing an angled pipe, pressurized fluids, and a steering tool that provides depth and positioning feedback.
[pdf] The Aban Pearl was designed by and was built in 1977 by Far East Levingston Shipbuilding (now part of the ) at the Levingston Singapore shipyard. The Aban Pearl could operate at. .
In 1977–1996, she was named Transocean Seeker, in 1996 Treasure Seeker and in 1996–2000 Transocean Discoverer. All this time she was owned by . In 2000–2007, she was named Bulford Dolphin an. .
In 2006, while contracted by the Nigerian oil company Peak Petroleum, the rig was attacked near Nigeria by Nigerian militants and eight of the personnel on the rig were kidnapped. They were released unharmed after two da.
[pdf] 
