- Bass-Trigon Software
 - Provider of compliance, risk assessment, and maintenance management software and professional services to the world-wide petroleum and natural gas pipeline industry. - Century Geophysical Corporation
- Manufacturer of borehole geophysical logging systems.
- Drilling Software
- Infopipe Information Services, Inc.
- Designs and develops databases, implements database conversions, assesses information handling and/or reengineering costs, integrates multiple applications, and optimises NT performance.
- Infostat Systems, Inc.
- Drilling database software for IADC drilling reports.
- Knowledge Systems, Inc.
- Provides geopressure analysis software products and wellsite services.
- Lomic, Inc.
- Designs and develops gas metering software.
- McRolin Software
- Offers spreadsheet functions for reservoir engineering and lognormal distributions.
- Modelling Engineering & Development Company - MEDCO
- Consultancy and software for coiled tubing companies.
- Molli Computer Services, Inc.
- Provides petroleum engineering software and services.
- Performance Sciences, Inc.
- Specialising in the analysis of production data for economic opportunities.
 Petrolink Services Ltd
- Installs, maintains, and supports software solutions for transmitting wellsite data to the client office.- R&R Visual, Inc.
- Pipeline inspection services including sonar profiling, televising via robotics, and geophysical surveys. Also offers a software system for video inspections.
- Seismic Micro-Technology, Inc.
- Supplier of PC-based interpretation software for the geoscience and petroleum industry. Delivers an integrated package with seismic, geological, visualisation, and attribute interpretation.
- Simulutions Inc.
- Specialists in pipeline simulations, including batch tracking, leak detection, scraper tracking, training simulation, look-ahead modelling, and optimisation.
- SiteLark
- Specialises in engineering software development, including Web-based reservoir simulations.
- Slope Analysis Group, The
- Enables users to define the soil or rock composition of a particular problem independently of the structure or excavation being considered for fast assessment of design options.
- Starling Associates, Inc.
- Offering flow measurement, EFM verification, phase behaviour and meter sizing software for the natural gas industry.
- Subsurface Computer Modeling, Inc.
- Geoscience consulting, training, and software company.
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