When horizontal directional drilling (HDD) professionals discuss the size of an HDD rig, they usually refer to the maximum pullback force the unit can develop. The most common industry standard for a large directional drilling unit is defined as having a minimum of 100,000 pounds of pullback force. In addition to pullback, the most common specifications used to categorize HDD equipment are rotary torque of drill stem, rotation speed and the size of drill pipe.
The Trenchless Technology Center (TTC) at Louisiana Tech University recently hosted a delegation from China’s largest petroleum pipeline construction and engineering firm to share information about technologies being developed at the University, exchange ideas, and to lay the groundwork for possible future collaborations.
For more than 30 years, video inspection has been a fundamental analytical tool for the evaluation and assessment of pipeline integrity. Originally developed as an aid for sewer system maintenance, video inspection equipment has played a key role in the development of a variety of trenchless rehabilitation methods.
The One-Call and excavation damage provisions included in the new pipeline safety bill passed by Congress in December will trigger a number of state and federal responses in 2012. However, a rule allowing the Pipeline and Hazardous Materials Safety Administration (PHMSA) to impose civil penalties on excavators -- ordered by the 2006 pipeline safety bill but never finalized -- would be even more significant. A proposed rule moving that requirement forward is expected this year, finally, perhaps as early as this winter.