Quality & Integrity

Quality Management System

The Quality Management System (QMS) developed and implemented by DSL has been designed to meet the requirements of BS EN ISO 9001: 2015; API Specification Q1 9th Edition: 2013.

Accredited approval of the DSL Quality Management System to the above-mentioned standards has been awarded by the American Petroleum Institute Quality Registrar (APIQR).

QMS approval scope is valid for the following product and service range:-
“ Design, Manufacture, Repair, Upgrade, Installation and Decommissioning of Hoisting Equipment and Drilling Structures; Provision of Rig Audits and Inspection/Survey Services; General Fabrication, and the development and delivery of Training for Derrick Technicians and Drilling Structure Inspectors. ”

API Licensed Manufacturer

API registration of the Company’s Quality Management System supplements the API 4F and 8C Product Licenses held by DSL, in accordance with which the company designs and manufactures oil-field drilling structures and hoisting equipment for an international customer base.

Authorization from API to apply the official API Monogram, demonstrates that the Quality Management System, inclusive of process controls relating to the manufacture of drilling structures and hoisting equipment, has been assessed by API and found to be in compliance with the requirements of API Specification Q1 and Product Specification Nos. 4F and 8C.


BS EN ISO 9001:2015: Quality Management System-Requirements.

API Specification Q1 9th Edition :2013 Specification for Quality Management System Requirements for Manufacturing Organizations for the Petroleum and Natural Gas Industry.

API Specification 4F Specification for Drilling and Well Servicing Structures 4th Edition 2013.

API Specification 8C Specification for Drilling and Production Hoisting Equipment (PSL 1 and PSL 2) – 5th Edition 2012.

DSL News

January 4, 2018

Leading with the best

PROJECT: Spirit-Energy DP6/DP8 Morecambe Hub Lifecycle project Sector: Asset Integrity Asset Lifecycle projects Engineering Project Management Date: January 2018 DSL’s Role:...

> Read More

Products & Services

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Contact Us

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DSL is an international company with offices around the globe. Please see the map or the list below to find your nearest office

Head Office

Falcongate House
Faraday Road
Harfreys Industrial Estate,
Great Yarmouth
Norfolk, NR31 0NF
Tel: +44 (0) 1493 669141
Fax: +44 (0) 1493 668409
Email: enquiries@derricksl.com


9 Abbotswell Road
AB12 3AD
Tel: +44 (0) 1224 898571
Fax: +44 (0) 1224 872322
Email: enquiries@derricksl.com


Derrick Services (DSL)
Suite 925, 11490 Westheimer
Texas 77077

Tel: 713 425 6393
Fax: 713 783 0067
Email: enquiries@derricksl.com


PT. Derrick Services Indonesia
Graha Kapital 2,
3rd Floor
JL. Kemang I No.7
Jakarta Selatan 12730
Tel: +62 21 7199516
Fax: +62 21 7198610
Email: enquiries@derricksl.com

Dubai, UAE

Derrick Services MENA FZE
Plot HD-17, PO Box 49945
Tel: +971 (0) 06 504 9888
Fax: +971 (0) 06 562 1417
Email: enquiries@derricksl.com


28/959C First Floor
Shreyas, Cheruparambath Road
Kadavanthara, Cochin 682020
Kerala, India
Tel: +91 484 4061000
Fax: +91 484 4060363
Email: enquiries@derricksl.com