Results 191 to 200 of about 1,297 (234)
Some of the next articles are maybe not open access.
Coiled Tubing Drilling: Directional and Horizontal Drilling With Larger Hole Sizes
SPE Annual Technical Conference and Exhibition, 2012Abstract Currently the options for directional drilling of larger hole sizes, such as those greater than 6", with Coiled Tubing Drilling (CTD) are limited. This paper introduces a new system that utilizes a 5.0" BHA with a Rotating Orienter. The BHA is the first drilling tool to utilize a solid state MEMs gyro for directional measurement
Paul McCutchion +2 more
openaire +1 more source
Pull-in force predictions for horizontal directional drilling
Proceedings of the Institution of Civil Engineers - Geotechnical Engineering, 2010Horizontal directional drilling is a ‘trenchless technology' that has been used successfully to install pipelines with minimal surface disruption. It has been developed to such an extent that pipelines 2·5 km long and with diameters approaching 2000 mm have been installed, and it has the potential to install pipelines over even greater distances.
A. C. D. Royal +3 more
openaire +1 more source
Remediation of Contaminated Sites Using Horizontal Directional Drilling
Construction Congress VI, 2000In recent years, a growing number of consultants and owners have considered the use of horizontal remediation wells as an alternative solution to the removal and containment of contaminants. Currently, engineers rely on complex systems of vertical wells or barrier wall systems which inject and/or extract subsurface water or vapor for on-site soil and ...
Samuel T. Ariaratnam, Erez N. Allouche
openaire +1 more source
Horizontal Directional Drilling with Ductile Iron Pipe
Pipelines 2007, 2007Since its development in 1948, and its introduction by the industry in 1955, Ductile Iron Pipe has become the most widely used product for water line installations. In conjunction with water line installations, Ductile Iron Pipe has become often used for gravity and force main sewer applications. Following a tradition with hundreds of years of history,
openaire +1 more source
Suggested Practices for Installations Using Horizontal Directional Drilling
Practice Periodical on Structural Design and Construction, 2000In recent years, the utilization of horizontal directional drilling (HDD) in urban areas for the installation of telecommunication, utilities, or municipal services has experienced a rapid growth. The hazards and complexity of working in urbanized areas, together with the ever increasing volume of construction activities, make the development of ...
Samuel T. Ariaratnam, Erez N. Allouche
openaire +1 more source
Special Practices of Horizontal Directional Drilling in China
ICPTT 2011, 2011This paper presents eight horizontal directional drilling crossing cases and their problems and solutions. These crossings were conducted by a horizontal directional drilling company of a petroleum pipeline bureau in China, and to make it clear, these crossings are classified into three categories according to the major geological conditions.
Hong Gao +4 more
openaire +1 more source
Horizontal gene transfer and adaptive evolution in bacteria
Nature Reviews Microbiology, 2021Brian J Arnold, William P Hanage
exaly
Beyond horizontal gene transfer: the role of plasmids in bacterial evolution
Nature Reviews Microbiology, 2021Jerónimo Rodríguez-Beltrán +2 more
exaly
Examining horizontal gene transfer in microbial communities
Nature Reviews Microbiology, 2021Ilana L Brito
exaly
Fatigue of Drill Pipes used in Mini-Horizontal Directional Drilling
Pipelines 2005, 2005Feibai Ma +2 more
openaire +1 more source