“(It’s) very disruptive, damaging, and just overall is not good.” “If every time a utility needs to build something across the right-of-way, you would have to block the road, dig it up, open a trench, lay down the pipeline or the pipe or cables, etc. Horizontal directional drilling can be used for smaller-scale purposes such as installing utility cables or pipelines and is quickly becoming a popular alternative to the trenching method, which involves digging or cutting up the ground. Three main stages of a typical horizontal directional drilling process: pilot bore drilling, reaming and pipe pulling. “Horizontal directional drilling: State-of-the-art review of theory and applications.” Tunnelling and Underground Space Technology 72: 162-173. Aria Ratnam, Shun Dong, and Cong Zeng (2018). Hall Endowed Professor, leads the project with Heather Shoup and Joseph Angeli, IDOT’s Central Bureau of Materials geotechnical engineer and District 6 permit technician, respectively. Youssef Hashash, University of Illinois Urbana-Champaign Department of Civil and Environmental Engineering William J. To serve this growing need, Illinois Center for Transportation and Illinois Department of Transportation aim to create standard guidelines in their joint project, “ R27-198: Development of Guidelines for Implementation of Horizontal Directional Drilling.” and French Oil & Gas Industry Association (1990) Directional drilling and deviation control technology.Advancements in horizontal directional drilling - a method in which a small-diameter tunnel is drilled under an area like a roadway or body of water - and lower installation costs have led to its increasing use in Illinois. Technical, T., Astier, B., Baron, G., Boe, J.-C., Peuvedic, J.L.P. (1993) Introduction to directional and horizontal drilling. Richardson, TX: Society of Petroleum Engineers. (2012) Fundamentals of drilling engineering. The build-up rate = q = 1.53 degree/100 ft The measure depth of the well = 10,477.35 ft We can answer in degree/100 ft by multiplied 100 therefore you will get the answer like this. Total MD from the rig to end of the build section = 7000 + 3477.35 = 10,477.35 ftĭetermine build rate via this following equation: You can determine the length of build section via the equation below Therefore, cos (θ) = 3/5 is the right answer for this case.įrom the Equation 1, you will be able to get Rb via the Equation 1
Then you need to check which answer is correct.Ĭos (θ) = 1 is unreal because θ = 0 degree. Use the polynomial relationship to arrange the equation as shown below: Therefore you can change the Equation 5like this: TVD in build section = 10,000 – 7,000 = 3,000 ftĮquation 2 ÷ Equation 1 so you will get like thisĪrrange the Equation 4 and you will get like this:Īccording to the trigonometry relationship The formula for radius build (Rb) and length of hole (L) are listed below respectively
Please keep in mind that this diagram I draw with the Power Point so it will not show good proportion but it can give you good idea on how to solve this problem. Calculate the measure depth and build up rate.įirst thing, I would like to draw a trigonometry diagram like this. He intends to achieve a horizontal departure of 1500 ft at the with the TVD at the target point to be 10,000 ft. Wellplanner is planning to design a deep kick-off well with a build section to by pass a salt dome section.
I got the question from my friend, Nien, asking me about directional drilling calculation and the question is shown below: