Paul Bommer Research Projects

Development of a New Marsh Funnel Rheometer for non-Newtonian Oil-Field Fluids

Matt Balhoff, Larry Lake, Paul Bommer

Techniques for measurement of fluid rheological properties are important for field operations in the oil industry, but existing methods are relatively expensive and the results can be subjective. Marsh Funnels are popular quality-control tools used in the field. In the normal measurements, a single point is used to determine an average viscosity.

Research Initiative: Casing Fatique Failure

Problem Statement

There are known instances where casing has failed during a multi-stage, high rate, and high pressure fracturing job. The failures are typically in the upper portion of the string in a collar. This failure causes weaker segments of the well bore to be exposed to high pressure that can lead to well head ruptures and surface blow outs, in addition to the loss of the productive interval.


The research will investigate the mechanisms of fatigue failure in the couplings to:

Research Initiative: Foam Cement

Problem Statement

The stability and rheology of foam cement are topics that are not well defined. This is because:

  1. There are a wide variety of recipes to make foam that effect the stability of the mixture.

  2. The foam is exposed to a wide variation in temperature and pressure as it is pumped into the well.

  3. The foam is subject to contamination by fluids in the well bore and used to place the foam.


Research Intiative: Predicting Sucker Rod Fatigue Failure

Paul Bommer

Problem Statement

The life of beam lift sucker rods is difficult to predict because of the wide variety of operating conditions. This has an economic impact because the longer sucker rods can be kept in service the higher the profit from the well.


Using actual run time data it is possible to predict the life of sucker rods based on the accumulated stress history of the rods. This has been outlined and carried out for several trial data sets.