T.D. Williamson

What T.D. Williamson does

T.D. Williamson (TDW) is a privately held provider of pipeline equipment, integrity assessment technologies, and turnkey intervention and isolation services for the global oil and gas industry. Founded in 1920 and headquartered in Tulsa, Oklahoma, the company serves both onshore and offshore pipeline operators across four continents through five manufacturing sites and an international network of service centers. Its portfolio is organized around three solution areas: pigging solutions (pipeline pigs, closures, passage indicators, and tracking systems), pipeline integrity (inline inspection platforms including MDS Pro and MDS Flex, magnetic flux leakage and EMAT technologies, and integrity engineering services), and hot tapping and isolation (SHiiELD double independent isolation, SmartPlug, STOPPLE and SHORTSTOPP plugging machines, tapping machines, valves, and fittings).

TDW's proprietary technology base includes more than 500 patents and several industry-first products, such as the SHiiELD double independent isolation and bleed system and the SMARTLAY offshore pipeline flood prevention system. Revenue is generated through a mix of equipment sales (proprietary plugging machines, isolation tools, fittings, and valves), turnkey field services (hot tapping and plugging execution, emergency pipeline repair, and offshore intervention), aftermarket maintenance and overhaul programs, and DOT-approved training services. Go-to-market is primarily direct enterprise sales supported by company-employed, four-year-trained field technicians, supplemented by a channel partner program.

The company is majority-owned by SCF Partners following its 2022 investment, with Apollo Global Management taking a strategic minority position in June 2025. Customer segments include major oil and gas transmission and distribution operators, offshore energy producers, and gas distribution utilities, with emerging activity in hydrogen pipeline repurposing through partnerships such as the SGN UK trial.

Name

T.D. Williamson

Legal name

T. D. Williamson, Inc.

Website

https://tdwilliamson.com

Company type

Private

Founded year

1920

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

T.D. Williamson (TDW) is a privately held, Tulsa-based provider of pipeline equipment, integrity assessment technology, and turnkey intervention and isolation services for global oil and gas operators. Founded in 1920, the company holds over 500 patents and serves onshore and offshore pipeline markets across four continents.

Ownership category

akta.pro rank

Product category

Pipeline Equipment and Services

NAICS

Oil and Gas Field Machinery and Equipment Manufacturing (333132), Mining and Oil and Gas Field Machinery Manufacturing (33313), Oil and Gas Pipeline and Related Structures Construction (237120)

SIC

Oil & Gas Field Machinery & Equipment (3533), Oil & Gas Field Services, Nec (1389)

akta.pro primary industry

Inspection, Integrity & Testing Services (NDT, Well Integrity, Corrosion, QA/QC) (EUALABAO)

akta.pro secondary industries

New Gas Line Installation & Extensions (HSAOAKAA), Pump & Compressor Packages (Skids, Booster Sets) (IMAHANAG)

Keywords

• Pipeline isolation services
• Hot tapping equipment
• Pipeline integrity inspection
• Pipeline pigging solutions
• Pipeline repair fittings

Headquarters

HQ city

Tulsa

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Pipeline Equipment and Tools: Sale of proprietary pipeline equipment including plugging machines, tapping machines, fittings, valves, and isolation tools. Products range from small ½-inch taps to 60-inch applications across various pressure ratings.
2. Field Services: Turnkey intervention and isolation services including hot tapping and plugging operations performed by qualified technicians. Services include onshore and offshore project execution, welding services, and emergency response.
3. Aftermarket Services: Maintenance, repair, and overhaul programs for TDW and other pipeline equipment. Includes cutter repair and refurbishment services, parts supply, and customized maintenance programs.
4. Training Services: DOT-approved classroom instruction and field training for intervention and isolation professionals. Four-year advancement program culminating in isolation master status.

Go-to-market motion2 records

Distribution channels3 records

Marketing channels10 records

Core offering

T.D. Williamson designs, manufactures, and services proprietary pipeline isolation, pigging, and integrity assessment equipment, and provides turnkey hot tapping and plugging (HT&P) field services for pressurized oil, gas, and petrochemical pipelines. The company sells equipment such as plugging machines, tapping machines, valves, fittings, inline inspection tools, and isolation systems, and dispatches trained field technicians to execute interventions onshore and offshore. Offerings are organized into three segments: Pigging Solutions, Pipeline Integrity, and Hot Tapping & Isolation.

Product overview

T.D. Williamson (TDW) offers a comprehensive portfolio of pipeline solutions organized into three core segments: Pigging Solutions, Pipeline Integrity, and Hot Tapping & Isolation. The Pigging Solutions segment includes various pipeline pigs (foam pigs, disc pigs, multipurpose pigs) and pigging system components including closures, pig passage indicators, and tracking systems. Pipeline Integrity offerings feature inline inspection technologies including MDS™ Pro and MDS™ Flex platforms, multiple magnetic flux leakage technologies (MFL, GMFL, LFM, SMFL), EMAT, deformation detection, and integrity engineering services. The Hot Tapping & Isolation segment provides advanced isolation technologies (SHiiELD™ double independent isolation, SmartPlug®, ProStopp™ DS), multiple plugging machine lines (STOPPLE®, SHORTSTOPP®), a comprehensive range of tapping machines, and extensive fittings including SANDWICH® valves, THREAD-O-RING™ fittings, POLYSTOPP® PE products, and mechanical SHORTSLEEVE™ fittings. TDW complements its products with turnkey field services including HT&P execution, emergency pipeline repair, SMARTLAY™ offshore flood prevention, and aftermarket maintenance programs. The company operates with over 500 patents and has provided pipeline solutions for over 100 years.

Differentiator

Problem solved

Functional benefit

Products and services

• SHiiELD System Double independent isolation and bleed (DiiB) system for high-pressure pipeline maintenance, with certified leak-proof performance, remote monitoring, and redundant isolation modules.
• SmartPlug Isolation Tool High-pressure isolation tool enabling double block and monitor isolation for pipeline maintenance without interrupting production, usable onshore and offshore.
• ProStopp DS Isolation Tool First double block and bleed isolation technology for the gas distribution industry, with hydraulically activated energized seal that conforms to the pipe wall for safe, reliable isolation.
• STOPPLE Plugging Machine High-pressure plugging equipment for in-service pipeline isolation without shutdown, available in multiple configurations including STOPPLE Train for double block and bleed operations.
• SHORTSTOPP Plugging Machines Low-pressure pipeline isolation plugging machines including SHORTSTOPP 275-500 (500 psi) and SHORTSTOPP II (200 psi) models.
• Tapping Machines Comprehensive range of drilling and tapping machines including T-101, T-203, 360, 660, 760, 860, 904, 936 XL, 1200RC, 1200 XL, T-2460 XXL, TD Drilling Machines, and P-101 for PE pipe.
• MDS Pro Platform Advanced pipeline integrity assessment platform combining five technologies in one tool to identify interacting threats within pipelines through comprehensive data analysis.
• SpirALL SMFL Magnetic Flux Leakage technology for pipeline defect detection.
• EMAT Inspection Technology Electromagnetic acoustic transducer technology for pipeline inspection.
• PETROSLEEVE Steel Type C compression sleeve repair system with non-intrusive design requiring no welding to operating pipeline. Quick installation.
• Pipeline Pigs Comprehensive range of pipeline pigs including foam pigs, multipurpose pigs, cleaning pigs, corrosion inhibitor pigs, and wax removal pigs.
• Pigging System Components Pigging system components including quick-actuating closures, threaded closures, pig passage indicators, and pig tracking/locating systems.
• SANDWICH Valve Valve designed for hot tapping and plugging operations with bidirectional design and positive shutoff, 4" through 48" with ASME Class 150/300/600 flanges.
• STOPPLE Fittings High-pressure fittings with ProSeries Advantage for STOPPLE plugging machines, 4"-36" with ANSI Class 600.
• SMARTLAY System Offshore pipeline flood prevention system using SmartPlug isolation technology that prevents seawater from entering new pipelines during wet buckle events, activating in less than one second.
• Hot Tapping and Plugging (HT&P) Services Turnkey hot tapping and plugging services enabling safe isolation and bypass of pressurized pipelines for maintenance, modification and repair, including onshore and offshore project execution.
• Emergency Pipeline Repair System (EPRS) Customizable strategic emergency response system for rapid mobilization to reduce pipeline downtime worldwide.
• Aftermarket Services Maintenance and repair programs ensuring intervention and isolation equipment stays in optimal operating condition, including OEM cutter repair and refurbishment services.
• Maintenance, Repair and Overhaul Programs Customized maintenance schedules incorporating OEM preventative maintenance recommendations to support internal maintenance programs.
• Pipeline Integrity Services Engineering solutions including Bending Strain and Line Movement Assessment, Circumferential Stress Corrosion Cracking Assessment, Corrosion Growth Assessment, Finite Element Analysis, and Static/Cyclical Dents and Cracks Assessment.
• POLYSTOPP PE Products Polyethylene pipe solutions including branching fittings, quick connect systems, and plugging fittings for gas distribution lines.

Quantifiable outcome

• Four times the throughput area compared to traditional double block-and-bleed isolation solutions
• +2 more outcomes

Named customers2 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature11 records

Scale indicators4 records

Recent moves5 records

Expansion highlights6 records

Direct peers

• STATS Group: STATS Group is a UK-based provider of pipeline isolation, hot tapping, and plugging services for oil and gas operators globally. They directly compete with TDW in the intervention and isolation segment, offering similar turnkey solutions for pressurized pipeline maintenance.
• Rosen Group: Rosen Group is a Germany-headquartered leader in pipeline inspection, integrity assessment, and inline inspection services. They compete directly with TDW's Pipeline Integrity segment, offering comparable MFL, ultrasonic, and geometry inspection technologies to oil and gas operators worldwide.
• NDT Global: NDT Global specializes in ultrasonic inline inspection and integrity services for oil and gas pipelines. They are a direct peer in the pipeline integrity assessment category, offering competing technologies for crack detection and metal loss inspection.

Broad incumbents

• Halliburton: Halliburton is one of the world's largest oilfield services companies with a Pipeline and Process Solutions segment. They offer pipeline services including integrity management and pre-commissioning, competing with TDW across multiple product and service categories as part of their broader portfolio.
• Baker Hughes: Baker Hughes is a major oilfield services and industrial energy technology company offering pipeline services through their Industrial & Energy Technology segment. They compete with TDW across pipeline integrity, intervention, and flow assurance as part of their wider portfolio.
• Applus+: Applus+ is a global testing, inspection, and certification company serving the oil and gas industry. They overlap with TDW in pipeline integrity services and non-destructive testing, though they operate across multiple industries beyond energy.
• Hunting PLC: Hunting PLC is a UK-based energy services company offering oilfield products and services including intervention tools and pipeline-related equipment. They compete with TDW in select product categories as part of their broader oilfield equipment portfolio.
• CIRCOR International: CIRCOR International manufactures flow control products including valves and fittings for oil and gas, power, and industrial markets. They overlap with TDW's valves and fittings product line, serving similar upstream and midstream customers with broader industrial applications.
• EnerMech: EnerMech provides integrated mechanical, electrical, and instrumentation services to the energy sector including pipeline services. They overlap with TDW in field service execution and pipeline commissioning work, though across a broader energy services scope.

Emerging players

• Penspen: Penspen is an engineering and project management company specializing in pipeline integrity, design, and asset management for oil and gas operators. They compete with TDW's integrity engineering services, focusing on consulting and engineering rather than proprietary equipment.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks5 records

Key highlights7 records

Customer concentration

• Xx.com/td_williamson
• YouTubeyoutube.com/user/MYTDWilliamson
• Facebookfacebook.com/td-williamson-187316909182
• LinkedInlinkedin.com/company/tdw
• Instagraminstagram.com/td_williamson

Compliance19 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Funding overview

Funding rounds2 records

Investors2 records

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

M&A1 record

Investments

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

Frequently asked questions about T.D. Williamson