Our Story

Lee C. Moore, A Woolslayer Company

Lee C. Moore has been a leading designer and manufacturer of drilling structures since 1907. In 1938, Lee C. Moore revolutionized the petroleum industry when they designed and built the first cantilever mast. To date the company has manufactured over 4,000 cantilever masts and over 700 offshore derrick structures. Today, Lee C. Moore designs and manufactures masts and derricks for nearly every major drilling company in every drilling condition offshore and onshore. They service both their own and other manufacturers’ masts and derricks globally. LCM also presents structural training seminars to drilling contractors around the world.

Lee C. Moore designs and manufactures products in accordance with quality requirements outlined in API Specifications 4F, 8C, and Q1 as well as quality management standards ISO-9001:2008, and TS-29001, adhering to API quality control specifications and following specifications as outlined by AISC, AWS, ANSI, and ASTM.

Current Licenses/Certifications:


API RP 4G and 8B category IV inspections for an offshore crown block sheave assembly, traveling block, and deadline anchor

Lee C. Moore teams have again completed an urgent project for our valued client ahead of schedule. This project consisted of API RP 4G and 8B category IV inspections for an offshore crown block sheave

API RP 8B category IV inspection and recertification of Traveling Block

Lee C. Moore, A Woolslayer Company again completes an API RP 8B category IV inspection and recertification ahead of schedule for an expedited return to service of our valued customer. Our teams in the

API Inspection & Recertification

Lee C. Moore has once again completed an API inspection and recertification of an offshore crown block within a tight schedule. Our teams in Saudi Arabia have completed this service ahead of schedule

40-ton EzTurn®BOP handling cradle

Lee C. Moore Introduces Groundbreaking 40-Ton EzTurn® BOP Handling Cradle, Setting New Industry Standards for Safety and Efficiency [Tulsa, Oklahoma] – Lee C. Moore, the leading provider of inn

Our Expertise

Cutting-Edge Products

Discover our comprehensive range of top-notch drilling structures and components. From robust rig designs to innovative accessories, we offer industry-leading solutions tailored to your specific requirements. Trust our expertise for superior quality and performance.

Reliable Field Services

Experience unparalleled support with our dedicated field services. Our licensed professional engineers ensure smooth operations through recertification, inspections, repairs, and structural modifications. With 24/7 availability and detailed reports, we keep your drilling rigs running efficiently.

Customized Engineering Solutions

Rely on our skilled engineering team to provide tailored solutions for your drilling equipment needs. We specialize in custom design, utilizing advanced technologies like 3D modeling and CAD prints. Whether working independently or alongside your project group, we deliver excellence at every phase.

Discover Opportunities

Join our dynamic team at Lee C. Moore and become an integral part of driving innovation in the drilling industry. We actively seek skilled service technicians who are dedicated to providing exceptional field support, offering you an exciting opportunity to make a significant impact and shape the future of drilling

Contact Us

Our team at Lee C. Moore is eager to connect with you. Whether you have inquiries, project requirements, or collaboration opportunities, we invite you to reach out to us. As a leader in the drilling industry, we value your input and look forward to hearing from you. Together, let's explore possibilities and create a lasting impact.