What GeoInstruments does

GeoInstruments, Inc. is a privately held, family-managed geophysical instrumentation manufacturer founded in 1980 and headquartered in Nacogdoches, Texas. The company designs, manufactures, and sells specialized well logging instruments, software, and related services to customers in the natural resources and environmental industries, with its core competency in uranium grade measurement.

Its flagship product is the Prompt Fission Neutron (PFN) Logging Tool, a proprietary downhole instrument approximately 70 mm in diameter and 3 meters long that uses a pulsed 14 MeV neutron source to induce fission of uranium-235 in geological formations. By counting thermal and epi-thermal neutrons in separate detector channels, the tool provides direct uranium-235 measurements that are unaffected by disequilibrium — a condition where uranium has migrated away from its decay products, rendering conventional gamma-ray logs unreliable. The tool achieves a minimum practical grade measurement of approximately 0.02% and is operated in continuous mode at 1 meter per minute. GeoInstruments also manufactures supporting hardware including logging trucks, downhole tools, winches, and standard or custom well logging systems, along with Windows-based logging and plotting software.

The company operates a direct, leadership-led enterprise sales model with no disclosed channel partners, distributors, or digital marketing infrastructure beyond a basic company website. Pricing is not publicly disclosed. Jim Turner (President) and John Turner (Vice President of Manufacturing) are publicly listed as direct customer contacts, indicating a small-scale, relationship-driven commercial operation. The company serves uranium mining and exploration firms as the primary segment, with secondary exposure to oil, gas, coal, water well, and environmental logging applications. No funding rounds, acquisitions, partnerships, or geographic expansion beyond the United States are disclosed.

Name

GeoInstruments

Legal name

GeoInstruments, Inc.

Website

https://geoinstrumentsinc.com

Company type

Private

Founded year

1980

Operating status

Operating

Headcount range

1–10 employees

Short description

GeoInstruments is a privately held, family-run manufacturer of specialized geophysical well logging instruments founded in 1980 in Nacogdoches, Texas. It primarily serves uranium mining and exploration firms with its proprietary Prompt Fission Neutron (PFN) Logging Tool, which directly measures uranium-235 to overcome the disequilibrium problem of gamma-ray logging.

Ownership category

akta.pro rank

Product category

Geophysical Well Logging Instruments

NAICS

Geophysical Surveying and Mapping Services (54136), Support Activities for Mining (213), Mining and Oil and Gas Field Machinery Manufacturing (33313)

SIC

Oil & Gas Field Exploration Services (1382), Mining Machinery & Equip (No Oil & Gas Field Mach & Equip) (3532), Oil & Gas Field Machinery & Equipment (3533)

akta.pro primary industry

Mineral Exploration & Geoscience Services (Geology, Geophysics, Geochemistry, Resource Modeling) (IMAKAKAA)

akta.pro secondary industries

Seismic & Geoscience Services (Acquisition, Processing, Interpretation) (EUALABAK), Geothermal Environmental & Regulatory Services (Permitting, Monitoring, Induced Seismicity, Water Management) (EUAMAEAL)

Keywords

• Geophysical well logging
• Uranium logging tools
• Downhole instruments
• Prompt fission neutron
• Well logging software

Headquarters

HQ city

Nacogdoches

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Supply Chain, Operations, Technology or R&D, Marketing or Sales

Revenue model

1. Geophysical Instruments and Equipment Sales: Sale of specialized geophysical well logging instruments and equipment including logging trucks, downhole tools, winches, and custom well logging systems. Equipment sales are one-time transactions with potential for replacement parts and accessories.
2. PFN Tools and Systems: Sale of Prompt Fission Neutron (PFN) tools requiring rack mount power supplies and microprocessor interface boxes. Includes specialized Windows logging software.
3. Software and Related Services: Provides software for well logging operations and related technical services to the natural resources and environmental industries.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels1 record

Core offering

GeoInstruments, Inc. manufactures Prompt Fission Neutron (PFN) logging tools, logging trucks, downhole tools, winches, and computerized well logging systems. The company also sells Windows-based logging software and plotting software, and provides open hole oil well logging and production logging services to the natural resources and environmental industries.

Product overview

GeoInstruments provides specialized geophysical instruments, software, and related services for the natural resources and environmental industries. Their core product is the Prompt Fission Neutron (PFN) Logging Tool—a specialized downhole instrument that measures uranium-235 content using neutron-induced fission technology, overcoming disequilibrium limitations of traditional gamma-ray logging methods. The company also manufactures supporting hardware including logging trucks, downhole tools, winches, and both standard and custom well logging systems. Proprietary Windows logging software and plotting software are provided alongside the PFN tool. Service offerings encompass Open Hole Oil Well Logging, Production Logging, Bond Logging, Sidewall Coring, Perforating, Uranium Logging, Prompt Fission Neutron Logging, Coal Logging, Water Well Logging, and Environmental Logging.

Differentiator

Problem solved

Functional benefit

Products and services

• Prompt Fission Neutron (PFN) Logging Tool
• Well Logging Systems
• Logging Trucks Custom-manufactured logging trucks outfitted for well logging operations in natural resources and environmental industries.
• Downhole Tools Downhole tools designed for geophysical well logging operations across multiple natural resource applications.
• Winches Winches manufactured by GeoInstruments for use in well logging operations.
• Windows Logging Software Windows-based logging software provided with PFN tools for use in uranium logging operations.
• Plotting Software Computerized plotting software sold by GeoInstruments for data visualization in well logging operations.
• Open Hole Oil Well Logging and Production Logging Services Complete open hole oil well logging and production logging services provided by GeoInstruments' field engineers and technicians trained in all aspects of well logging.

Quantifiable outcome

• Minimum practical grade measurement of approximately 0.02%
• +1 more outcomes

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Scale indicators1 record

Recent moves3 records

Expansion highlights1 record

Broad incumbents

• Halliburton: Major oilfield services company with broad logging, perforating, and formation evaluation offerings. Comparable to GeoInstruments on peripheral well-logging services; potential consolidator if it chose to enter specialized uranium assay directly.
• Reflex Instruments (IMDEX): IMDEX-owned manufacturer of downhole instrumentation, orientation tools, and drilling analytics for mineral exploration globally. Comparable in mining-focused downhole instrumentation, with greater scale, international reach, and parent-company backing.
• Fugro: Global geo-data specialist offering geophysical, geotechnical, and surveying services for mining, energy, and infrastructure. Adjacent to GeoInstruments' environmental and geotechnical logging applications, with a much larger service portfolio.
• Schlumberger (SLB): Global oilfield services giant offering extensive open-hole, cased-hole, and production logging services and tools. Competes with GeoInstruments' peripheral oil & gas logging lines and could develop a competing direct-assay capability.

Direct peers

• Mount Sopris Instruments: Long-standing US manufacturer of borehole geophysical logging instruments (MX-series) used in mineral, groundwater, and environmental applications. Highly comparable to GeoInstruments as a small, specialist maker of downhole logging tools sold to the same mining, environmental, and water-well customer base.
• Century Geophysical: US well-logging services and equipment provider offering open-hole, production, and cased-hole logging. Comparable to GeoInstruments' peripheral service lines and competes for many of the same small-operator and exploration customers.
• Terraplus (formerly Scintrex): Canadian manufacturer of geophysical instruments for mineral exploration, including radiometric and magnetic tools. Comparable to GeoInstruments' uranium and mineral-logging focus, with overlap in radiometric survey technology used in the same disequilibrium-related workflows.
• Robertson Geologging (now part of DGS Group): UK-based manufacturer of slim-hole geophysical logging tools and software for mineral exploration, coal, and geotechnical applications. Directly comparable to GeoInstruments in product line (downhole probes, winches, surface systems) and customer overlap in uranium, coal, and environmental logging.

Regional players

• Boart Longyear: Global drilling services and products company serving mineral exploration, including drilling tools and instrumentation. Comparable in mineral exploration customer overlap and downhole tooling, though predominantly a drilling contractor rather than a logging instrument maker.

Emerging players

• Zonge International: US provider of geophysical instrumentation and field services for minerals, groundwater, and environmental geophysics. Comparable customer base (uranium, environmental) and overlapping surface geophysics capabilities, though broader service-line oriented.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks6 records

Key highlights5 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about GeoInstruments