11:00 Networking

11:30 Lunch

12:00 – 1:00 Presentation

Bio - Dr. Thomas Danielson

Tom received his BSc degree from University of Minnesota and his PhD from University of Massachusetts, both in chemical engineering.  Tom went to work for ConocoPhillips in 1991, and just recently completing his 25th year with the company.  Throughout his career, Tom has focused on multiphase modeling and its application in Upstream Production.  During that time, Tom has acted as ConocoPhillips technical monitor for many JIPs in the area, both domestic and international.  Tom has worked extensively on the development of both OLGA and LEDAFlow commercial simulators, in addition to his own modeling work on a variety of multiphase flow phenomena.  Lastly, Tom is the current chairman for the BHRG North American conference, to be held in Banff, Canada in 2018.

Abstract

When a fluid in motion is suddenly stopped, a pressure surge wave is generated which propagates back through the fluid.  This effect is commonly referred to as 'water hammer'.

This presentation gives an overview of water hammer in Upstream Production.  The Joukowsky Equation for pressure surge is derived analytically from first principles for inelastic pipe, and the impact of slow valve closure and frictional  effects is considered.  Joukowsky is then modified to account for pipe elasticity, again from first principles.  The equation is modified still further to account for the presence of small amounts of gas in the liquid.  Finally, an analytic estimate of condensation-induced water hammer - the most severe form of water hammer - is given.

The main point of the presentation is that a great deal of analysis of water hammer can be done using simple pencil-and-paper methods.