What Lee C. Moore, A Woolslayer Company does

Lee C. Moore, A Woolslayer Company, is a privately held designer, engineer, and fabricator of drilling structures for the oil and gas industry, founded in 1907 and headquartered at the Port of Catoosa, Oklahoma. The company manufactures offshore drilling derricks (including the patented Dual Offset Derrick, Bottleneck, Dynamic, Hingeable, Flatback, and Telescoping xS Mast designs), land drilling rig packages (the HMR I/II/III and patented HMR SlotBox Highly Mobile Rig systems), masts, substructures, and a broad catalog of drilling components (Rig Rover moving systems, BOP handling systems, deadline anchors, traveling and crown blocks, windwalls). All manufacturing is API 4F and 8C compliant, with additional API Q1, ISO 9001:2015, and TS 29001:2010 certifications, and the firm holds approvals from ABS, DNV, and Lloyd's Register.

The company monetizes through three primary revenue streams: (1) custom-engineered drilling structure sales ranging from hundreds of thousands to several million dollars per unit, with multi-unit orders typically placed by enterprise drilling contractors and shipyards (Keppel FELS, Oro Negro, Premier International Shipyards); (2) field services including API RP 4G Category III and IV inspections, recertification, structural repairs, modifications, and 24/7 emergency response delivered globally through direct teams and channel partners (Allrig in Middle East and India, UCTC in Saudi Arabia, Mara Services in Argentina); and (3) engineering services comprising custom design, structural studies, the Engineering Endorsement Program covering 12 endorsed rigs worldwide, and paid training seminars ($1,650 per attendee as of 2013). Go-to-market combines direct enterprise sales out of Tulsa, Houston, and Dhahran with regional channel partnerships, supported by attendance at industry events such as the IADC Land Drilling Conference and participation in third-party publications.

The company operates under parent Woolslayer Companies, Inc., with current leadership headed by President and CEO Jason Gress (since August 2020), Senior VP and Chief Engineer Dewayne Vogt (40+ year veteran), VP of Engineering Christopher Haist (joined 2021), and Senior VP of Operations Melissa Herring. Headcount has grown from 86 employees in 2011 to 101-250 currently, supported by a new headquarters under construction at Port of Catoosa since 2019 and a Houston office opened in 2015. Lee C. Moore holds cumulative production of more than 4,000 cantilever masts and 700+ offshore derricks since inventing the first cantilever mast in 1938.

Name

Lee C. Moore, A Woolslayer Company

Legal name

Woolslayer Companies, Inc.

Website

https://lcm-wci.com

Company type

Private

Founded year

1907

Operating status

Operating

Headcount range

101–250 employees

Short description

Lee C. Moore, founded 1907 in Tulsa, Oklahoma, designs, engineers, and fabricates API-certified drilling structures including offshore derricks, land drilling rigs, and rig components for oil and gas drilling contractors and shipyards worldwide.

Ownership category

akta.pro rank

Product category

Oil & Gas Drilling Equipment Manufacturing

NAICS

Oil and Gas Field Machinery and Equipment Manufacturing (333132), Mining and Oil and Gas Field Machinery Manufacturing (33313)

SIC

Oil & Gas Field Machinery & Equipment (3533), Drilling Oil & Gas Wells (1381), Oil & Gas Field Services, Nec (1389)

akta.pro primary industry

Oilfield Equipment Manufacturing & Supply (Wellheads, BOPs, Surface Equipment) (EUALABAL)

akta.pro secondary industries

Drilling & Workover Rigs (Land & Offshore) (EUALABAA), OFS Engineering, Construction & O&M (Field Development, Brownfield, Maintenance) (EUALABAM)

Keywords

• Drilling rig derricks
• Oil and gas equipment
• Drilling structure manufacturing
• Land drilling rigs
• Offshore drilling structures

Headquarters

HQ city

Tulsa

HQ country

United States

HQ region

North America

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Drilling Structure Equipment Manufacturing: Design, engineering, and fabrication of drilling masts, derricks, and substructures for land and offshore drilling applications. Equipment includes cantilever masts, telescoping masts, hingeable/flatback/bottleneck/dynamic derricks, and HMR packages. Revenue from sale of custom-built steel structures ranging from hundreds of thousands to millions of dollars per unit. Multiple units ordered at a time (e.g., 9 derricks for shipyards, 10 HMR packages).
2. Rig Components and Accessories: Sale of drilling structure accessories and components including BOP handling systems (rocknroll, xSport, EzTurn), Rig Rover moving systems, traveling blocks, crown blocks, deadline anchors, windwalls, stairs, walkways, and other equipment.
3. Engineering Services: Custom design services for specialized drilling equipment using 3D or CAD prints. Studies and analysis including load capacity assessments. Professional engineering endorsement programs. Custom seminars and training. Engineering support for modifications and upgrades.
4. Field Services and Recertification: On-site inspection, repair, recertification, and modification services for all makes and models of drilling structures globally. Includes API RP 4G Category III & IV inspections, recertification, emergency repairs, and structural upgrades. 24/7 availability with worldwide mobilization capability.
5. Training Seminars: Drilling structure seminars covering design, inspection, maintenance, and repair. Offered as standard 2-day courses ($1,650/person) or customizable micro-seminars with 11 topic options delivered on-site. Certificate of attendance provided.
6. Replacement Parts: Supply of replacement parts for drilling structures, including spare crown and auxiliary sheaves, brake/mill components, and other wear items.

Pricing tiers

Go-to-market motion3 records

Distribution channels5 records

Marketing channels5 records

Core offering

Lee C. Moore designs, engineers, manufactures, and sells drilling rig structures (masts, derricks, and substructures) and accessories for the oil and gas industry, serving both offshore and land drilling markets. The company also provides complementary engineering services (custom design, studies, endorsement) and 24/7 field services (API RP 4G inspections, recertification, repairs, modifications). Founded in 1907, it has produced over 4,000 cantilever masts and 700+ offshore derricks.

Product overview

Lee C. Moore, A Woolslayer Company is a drilling structure manufacturer offering a comprehensive portfolio of offshore and land drilling equipment. The product lineup includes offshore drilling structures (Bottleneck Derrick, Dual Offset Derrick™, Dynamic Derrick, Hingeable Derrick, Flatback Derrick, Dynamic Mast, Telescoping xS Mast®, Folding Mast), land drilling structures (HMR SlotBox®, HMR I, II, and III Highly Mobile Rig® Packages), masts (Hi-Floor, Conventional Cantilever, Side Saddle, Butterfly Mast™, Telescoping xS Mast®), substructures (Hydraulically Raised, Modular Box-on-Box, Vertical Extension/Pony Subs), and drilling structure components/accessories (Rig Rover® Pad Rig Moving Systems, BOP Handling Systems, Triple Crown BOP xSPORT™, BOP rocknroll® Handling System, EzTurn™ BOP Cradle, Traveling Blocks, Crown Blocks, Deadline Anchors, Rotating Drum Deadline Anchor, and various safety/access systems). The company also provides complementary engineering and field services including API inspections, recertification, custom design, studies and analysis, the Engineering Endorsement Program, and training seminars. Founded in 1907, the company revolutionized the industry by designing and building the first cantilever mast in 1938 and has since manufactured over 4,000 masts and 700+ offshore derricks.

Differentiator

Problem solved

Functional benefit

Brands

• Highly Mobile Rig (HMR): Land drilling rig package designed for rapid well-to-well pad drilling mobility.
• Rig Rover
• HMR SlotBox
• Dual Offset Derrick

Products and services

• Bottleneck Derrick Offshore drilling derrick designed for jackup rig applications with optimized space utilization.
• Dual Offset Derrick™ Patented offshore derrick with well center offset in both x- and y-axes about the derrick centerline, offering improved drilling operations visibility, increased setback capacity, and safer rig floor area. Accommodates drill pipe, drill collars, and casing simultaneously.
• Dynamic Derrick Offshore derrick designed for dynamic drilling conditions with enhanced structural performance.
• Hingeable Derrick Offshore derrick with hingeable design for transportation and installation flexibility.
• Flatback Derrick Offshore derrick with flatback configuration for specific jackup rig applications.
• Dynamic Mast Offshore mast designed for dynamic loading conditions in drilling operations.
• HMR SlotBox® Highly Mobile Rig® Package Patented land drilling rig package featuring innovative substructure design with built-in Rig Rover moving system, hydraulically raised mast, BOP handling system with maintenance platform, and integral stairs in substructure boxes. Reduces site-to-site rig moving time.
• HMR I Highly Mobile Rig® Package Entry-level highly mobile rig package with hydraulically raised cantilever mast for land drilling operations, featuring multi-stage sophisticated cylinders and hydraulic technology.
• HMR II Highly Mobile Rig® Package Mid-range highly mobile rig package with enhanced capacity and hydraulic raising system for land drilling operations.
• HMR III Highly Mobile Rig® Package Premium highly mobile rig package with maximum capacity and advanced hydraulic systems for intensive land drilling operations.
• Conventional Cantilever Mast Traditional cantilever mast design for land drilling. Lee C. Moore's original 1938 cantilever mast revolutionized the industry.
• Hydraulically Raised Substructure Substructure with hydraulic raising capability for efficient assembly and disassembly in land drilling operations.
• Rig Rover® Pad Rig Moving Systems Mast and substructure moving system for well-to-well pad drilling, achieving 25-foot moves in less than 15 minutes with full circle rotations and uniform lift up to 1,300 tons.
• Triple Crown BOP xSport™ Transportable cradle and integrated lifting cylinders system for transporting fully operational BOP stacks via truck between land drilling rig sites, unloading under working floor, and hydraulically raising to vertical operating position.
• BOP rocknroll® Handling System Patent-pending system that transports BOP stack horizontally, attaches to substructure, raises to vertical, and walks to well center in a single operation. Reduces rig-up and rig-down time from hours to minutes.
• EzTurn™ BOP Cradle BOP cradle that easily rotates by personnel without additional mechanical force, enabling easy wellhead alignment without tugger lines.
• Rotating Drum Deadline Anchor Highly recommended anchor with rotating drum for efficiently slipping drill line, optimizing safety and reducing downtime. Load capacities up to 200,000 pounds, designed per API 8C specifications.
• API RP 4G Category III & IV Inspection Services API RP 4G Category III & IV inspections and recertification services for drilling structures of all makes and models, including comprehensive reports with professional engineering certification.
• 24/7 Field Services Round-the-clock field service availability for emergency response, maintenance, repairs, recertification, and structural upgrades on drilling structures worldwide.
• Recertification Services Recertification of drilling structures of all makes and models, ensuring API compliance and safe operations worldwide.
• Site-Managed Structural Repair Services Site-managed structural repairs for drilling structures and components, performed by Lee C. Moore field personnel.
• Structure Modifications and Upgrades Structure modifications and upgrades for drilling rigs, including racking platform capacity increases and setback modifications.
• Custom Engineering Design Services Custom engineering design services for specialized drilling equipment, provided in 3D or CAD prints, with Lee C. Moore's engineering team taking lead or working jointly with customer project groups.
• Engineering Endorsement Program Certification program for masts, substructures, and complete rig packages. Includes Crown-to-Ground survey, endorsement certificate, updated drawings, and lifetime engineering support. Has endorsed 12 rigs worldwide.
• Drilling Structure Training Seminars Customizable training seminars on drilling structure design, inspection, maintenance, and repair. Topics include nomenclature, design overview, mast raising/lowering, API RP 4G introduction, inspection, welding guidelines, and repair principles. Available as 2-day courses or on-site micro-seminars.

Quantifiable outcome

• HMR SlotBox reduces site-to-site rig moving time by up to 3 days vs conventional land rig designs
• +4 more outcomes

Named customers6 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

Four partnerships are on record, tiered core and major.

• Mara ServicescoreStrategic or Co-development Partner · 31 March 2021MOU signed March 31, 2021 for regional agreement in Argentina. LCM-WCI and Mara jointly provide API 4G & 8B equipment inspections, recertifications, engineering services, and customer support. Mara contacts: José Almohalla, Marcelo Corrêa, Marcelo Gomez. LCM-WCI contact: [email protected].
• United Caravan Trading and Contracting (UCTC)coreStrategic or Co-development Partner · 19 March 2021Non-binding MOU signed March 19, 2021 for regional agreement within Kingdom of Saudi Arabia. LCM-WCI and UCTC jointly provide customers with inspections, fabrication, and customer support in KSA. Operations conducted from UCTC yard at Half Moon Beach Road, Dhahran, KSA. Contacts: Casey Halford (Director, Middle East Operations), Jerry Murray (Senior Manager, Technical Services Support).
• AllrigcoreChannel Partner/ Reseller/ DistributorPartnership agreement with leading field services provider Allrig, making them exclusive LCM-WCI agent in Middle East and India. Allrig provides in-region inspection, repair, and service teams for both onshore and offshore. CEO Mark Hannigan leads Allrig from Houston. Partnership announced with emphasis on consolidation and collaboration for industry strength.
• Keppel FELS ShipyardmajorTechnology or IntegrationLong-standing customer-supplier relationship for offshore derrick delivery. Supplied 16th of 31 LCM-WCI 15285 Model Derricks for installation on B-Class Hull jackup rigs for Keppel FELS. Each derrick: 160 ft tall, 36x36 ft base, 1,500 kip capacity, with offline stand building and Forum 16k-R crane accommodation.

Scale indicators11 records

Recent moves11 records

Expansion highlights6 records

Direct peers

• National Oilwell Varco (NOV): One of the largest oilfield equipment OEMs globally, NOV designs and manufactures drilling rig packages, masts, derricks, and substructures for both onshore and offshore markets, directly competing with Lee C. Moore's core drilling structure portfolio.
• Forum Energy Technologies: Diversified oilfield equipment manufacturer with explicit drilling structures, rig components, and drilling-related product lines, overlapping with Lee C. Moore's mast/derrick/substructure business for land and offshore applications.
• MHWirth (a brand of Akastor): Supplies complete drilling packages including masts, derricks, and substructures for offshore and land rigs; competes head-on with Lee C. Moore in offshore drilling structure design and fabrication.
• Bentec GmbH Drilling & Oilfield Systems: Manufacturer of onshore drilling rigs and rig components, including masts, substructures, and drilling structure accessories; directly comparable product portfolio for land drilling contractors similar to Lee C. Moore's HMR series.
• Drilling Structures International (DSI): Specialist drilling structures manufacturer focused on masts, substructures, and rig-moving systems; competes with Lee C. Moore's HMR and Rig Rover product lines for pad drilling and land rig applications.

Broad incumbents

• SLB (Schlumberger), including Cameron drilling equipment: Largest oilfield services and equipment provider; through Cameron and other product lines, supplies drilling equipment including BOPs, derricks, and rig packages that overlap with Lee C. Moore's drilling structure and BOP handling offerings.
• Helmerich & Payne (H&P): Largest US land drilling contractor and operator of proprietary FlexRig designs; though primarily a drilling contractor, H&P internally designs and procures rig structures comparable to Lee C. Moore's HMR land packages.
• KCA Deutag: International land and offshore drilling contractor with in-house rig design and manufacturing capability (TBB, Bentec rigs); overlaps with Lee C. Moore as both a customer and a competing integrated rig/structure provider.
• Precision Drilling: Major North American drilling contractor that operates proprietary high-spec rigs (including Super Triple and Alpha series) and procures drilling structures similar to Lee C. Moore's HMR SlotBox platform.
• Weatherford International: Diversified oilfield services and equipment provider with drilling-related products (hoisting, rotary, BOP handling, rig equipment); broad incumbent whose equipment portfolio overlaps with Lee C. Moore's drilling components and accessories.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks7 records

Key highlights8 records

Customer concentration

• Facebookfacebook.com/leecmoorewoolslayer

Compliance7 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles15 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 Lee C. Moore, A Woolslayer Company