• Central Daylight Time
    January 26, 2023
    8:30 am - 12:30 pm
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David Willoughby will present “Horizontal Directional Drilling for Pipelines Design Example and Stress Analysis Workshop” as a webinar on January 26, 2023

 Course Description

A key aspect of HDD design is determining the design approach and bore path profile for the crossing. Based on the proper approach, the bore path is designed to negotiate the obstacles the crossing will encounter. This webinar will provide training related to selecting the HDD design approach and the proper design of the HDD bore path while considering accuracy implications, surface and subsurface conditions and impacts on HDD design. This webinar also provides technical information on product pipe stress analysis. The webinar includes design calculations with examples. After presenting and discussing the HDD design material, we will look at a class HDD design project using the applicable HDDPT modules.

Course Outline

HDD Design Approach

  • Basic Principles
  • Drilled Path Design
  • Directional Accuracy and Tolerances
  • Multiple Line

Surface Conditions

  • Work Area Conditions

Subsurface Conditions

  • Soil Performance

HDD Stress Analysis for Steel Pipelines

  • Pre-Installation
  • Installation
  • Operating
  • Allowable Stress Limits
  • Perform Class HDD Design Project
  • Demonstration of the Applicable Modules in HDD PowerTool

HDD Stress Analysis for Plastic Pipelines

  • Pullback Loads


  • Certificate of Completion awarding 4 PDHs
  • Course notes provided electronically

Instructor Bio

David A. Willoughby, RK&K Director, Energy & Corrosion (ret)

Mr. Willoughby has 40 years of experience in engineering, pipeline design, corrosion control, and management in the petroleum and utilities pipeline industry. His experience includes gas transmission and distribution systems, petroleum facilities, and water/sewer pipelines from conception through design, construction and testing, economic evaluation, and project field supervision. Mr. Willoughby has been responsible for the design, permitting, inspection, and construction administration of numerous horizontal directional drills (HDD) on pipeline projects. Mr. Willoughby is author of several articles and two books published by McGraw-Hill; Plastic Piping Handbook, 2002, and Horizontal Directional Drilling, 2005.

Mr. Willoughby provides HDD training to the pipeline and utility industries. He has presented HDD training to the engineering workshop at the N.C. Utilities Commission Office of Pipeline Safety Conference, Southern Gas Association Annual Conference and teaches several HDD programs a year for a broad list of clients such as Equitable Resources, Dominion Energy, FERC, National Gas Company of Trinidad, Public Service of NC, Exxon Pipeline, Shell Oil, Atlanta Gas and Light, Dominion Transmission, Columbia Gas Transmission, Colonial Pipeline, Questar Gas Company, Kansas Gas Services, HT Engineering, etc. Mr. Willoughby’s HDD training is used to provide Professional Development Hours (PDU) for professional engineers in many states, including Texas.

Read more about David Willoughby by viewing his instructor bio page

This training receives a 5 out of 5 stars rating!
“Excellent presenter, clearly an expert in the field of HDD.”
“The instructor was knowledgeable and able to express the ideas and concepts during the webinar.”
“Speed, resolution, and content was great.” (Commenting on webinar platform and content of course)
“Mr. Willoughby has a great combination and balance of field experience and technical expertise.”
100% of respondents would recommend this webinar to others within and outside of their company.

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