Dudley J. Gray Subsea Equipment Professional Engineer

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Dudley J. Gray Subsea Equipment Professional Engineer


PE - TX #86978 – Currently Active in Texas since 2/16/2001

12630 Blackstone River Drive
Humble, TX 77346
713 305 1782

Athletic/sports minded – completed twelve 26-mile marathons


  • To believe, live and witness every day with 24/7 awareness of the need to be conscious of safe behavior and environmental considerations in every aspect of existence, whether carrying out office or field operational procedures at work, enroute to and from work, at home and/or wherever else I am privileged to be.


  • To join a team in a leadership technical advisor/mentoring/training role focused on engineering, manufacturing, testing and installing Subsea Production Equipment.

  • Resume active hands-on engagement with an industry leading company in pursuit of perpetuating and advancing state of the art offshore subsea production system technology.


California State Polytechnic – San Luis Obispo, CA

BS Mechanical Engineering 1967

  • UnoCal Exploration & Prod. – summer student Cat Canyon Field- Orcutt, CA

  • UnoCal Pipeline Div. – summer student – Board Draftsman-Ink on Mylar dwgs f/Central Cal. Hwy 5/CA Aqueduct/UnoCal Pipeline Crossings – McKittrick, CA

SAE Mac Short Award – 1966 Engineering Contribution – Senior Project - Idea Development/Reduction to practice of the Torsion Bar Boat Suspension System

Torsion Bar Suspended Boat – Patent #3,517,632 –1970


Senior Executive Engineer

Advisian (INTECSEA, Inc) – Employee #71239

Subsea Systems Consulting Engineer│Various Projects

Sep 4, 2012 – Oct 11, 2017

Project Summaries:

SNEPCO – Shell Nigeria Exploration and Production Company Limited

4 March – 01 August 2017

Bonga Southwest/Aparo – 43 Well Deepwater Subsea Field Development offshore Nigeria - Producing to an FPSO.

BSWA SURF re-FEED to issue ITTs for subsea production and water injection trees, manifolds, and controls equipment to bidders in September 2017.
June 1 to July 15, 2017

Supported BSWA re-FEED Efforts collaborating with DeltaAfrik Engineering Limited.

Subsea Hardware Lead – Six weeks assignment to Lagos Nigeria Prepared:

  • Subsea Production and Water Injection Tree Functional Specification and Data Sheet

  • Completion/Workover Riser and Installation/Workover Control System Functional Specification and Data Sheet

  • Standard and Smart Production & Water Injection Tree Schematics and Process Engineering Flow Schemes (PEFSs)

    • Coordinated efforts by drafting team to progress drawings for issue.

  • Advised System Engineering Manager, Construction Manager, Interfaces Manager and Controls Equipment Lead as required for clarification of subsea hardware functionality and work scope.

Hess Operated – Stampede Joint Development Project
Jan – Nov 2016
Implement Phase with Partners Chevron, Nexen and Statoil
Multiwell Central US GOM subsea development of up to 12 wells producing from 2 drill centers in 3,500ft water depth to a TLP.

Subsea Tree Package Lead – Responsible for interfacing and coordinating efforts with Hess, their Partners, FMCTI and Third-Party Inspection Team for the supply of Qty 7 ea. 18-3/4 x 15k EVDT Production Trees and Qty 4 ea. 18-3/4 x 15k EVDT Water Injection Trees.

Chevron – Buckskin/Moccasin Phase 2B – Pre-FEED
Sep 2014 – Jan. 2016
Buckskin Moccasin development has transitioned to a tie-back system to the nearby Anadarko Lucius Spar installed and commissioned recently.

Subsea Systems Engineer - Responsible for reviewing specifications, drawings and reports for the subsea trees, manifolds, jumpers, controls and boost pump equipment.

Anadarko – Prosperidade/Golfinho - Mozambique Project
Jul – Aug 2014

Subsea Systems Engineer - Prepared various subsea manifold and PLET specification documents to support the RFQ package.

Chevron – Wilcox Tertiary Recovery Project (WTRP) Phase 2B
Dec 2013 – Jun 2014
Pre-FEED: Concept selection for extending productive field life of Buckskin Moccasin by injecting gas in a third phase after primary and secondary recovery (water injection) phases have matured. Study defined and evaluated two stages of investment:
1. Minimal Pre-investment required for BSM base case to enable second stage.
2. Full investment including addition of a purpose-built host facility for transitioning to gas injection using Water Alternating Gas (WAG) injection operation into the secondary recovery water injection wells.

Subsea Systems Engineer - Responsible for generating and reviewing specifications, drawings and reports for the subsea trees, WAG manifolds, jumpers, controls, umbilicals, boost pump and subsea separation equipment.

Chevron – Buckskin/Moccasin Phase 2B – Pre-FEED
Aug – Dec 2013
The Buckskin and Moccasin development concept consisted of a centrally-located hub facility that processes and exports production from the Buckskin and Moccasin Fields in the Keathley Canyon (KC) area, offshore Gulf of Mexico located approximately 267 miles southwest of New Orleans, LA in approximately 6,500 feet of water.

Subsea Systems Engineer - Responsible for generating and reviewing specifications, drawings and reports for the subsea trees, manifolds, jumpers, controls, and boost pump equipment.

Chevron - Rosebank FPSO and Subsea FEED
Sep 2012 – Jul 2013
The Rosebank development is approximately 80 miles (130 km) northwest of the Shetland Islands in water depths of approximately 3,700 feet (1,100 m) in an area known as West of Shetland.

Subsea Engineering Lead - Responsible for delivery of the subsea (SURF) equipment package and system level engineering documentation.

Hess Corporation – Ceiba Redevelopment

Nov 2010 – Aug 2012 (Contractor through Stress Subsea)

Subsea Tree Package Lead - Prepared specs, coordinated the engineering, purchase, manufacturing/testing of 6 upgraded tree equipment order from Cameron, Leeds, England, including transport, set up and test upon arrival in Equatorial Guinea – in process 2011 – 2012.

BP Subsea Systems(GOM)/Stress Engineering - Mad-Dog Ext.& Isabela Project 15ksi Tree Implementation Phase

Nov 2009 - Jan 2010 (Contractor through Stress Subsea)

Subsea System Engineer - Assembled scope of supply document package (complete summary overview) of BP SPS GoM production control system for presentation to Engineering Contractor on Mad Dog North Extension.
Feb 2010 – Mar 2011 (Contractor through Stress Subsea)
(Overlap w/Hess 50/50 Nov 2010 – Mar 2011)

Coordinated preparation of BP SPS Universal 15ksi – 18-3/4x5x2 Horizontal Spool Tree hydraulic schematic.

Supported Isabela project subsea tree EFAT in Cameron’s Berwick, LA facility.

Reformatted Rig Manuals for trees, tubing hangers & associated tools.

Chevron SASBU – Lianzi – 26mi BBLT Step Out – South Africa

Apr 2009 – Oct 2009 (Contractor through Swift O&G)
Subsea Equipment Engineer

Worked closely with Chevron & KBR Granherne engineering teams for preparation and review of Subsea Equipment Vendor (SEV) and Subsea Installation Contractor (SIC) RFQ Packages.

Chevron Engineering Technology Company (ETC)

Aug 2007 – Mar 2009 (Contractor through Path Consulting Ltd)
Subsea Equipment Engineer
Revised and updated Chevron Standard Subsea Equipment specifications
Assisted with preparation and presentation of training classes about subsea production equipment

Chevron DWEP – Blind Faith Project
April 2005 – July 2007 (Contractor through Path Consulting Ltd)
Blind Faith consisted of a 4 subsea well cluster tied to a subsea manifold tied back to a purpose built semisubmersible host in 6,500 ft. water depth in Miss. Cyn. blocks 695 & 696 of the Gulf of Mexico.
Subsea Equipment Engineer Lead – CVX Resident at FMCTI – Coordinated engineering, manufacturing, assembly and FAT/EFAT/SIT testing phases of four 15ksi (HPHT) EHXT’s, Manifold, Jumpers and PLETs.

Aker Maritime/Coflexip/Technip - Employee

Sep 2003 – Mar 2005 - BP Atlantis Multiwell GOM Subsea Development tied back to a semisubmersible host.
Subsea Tree Engineer Lead - Interfaced with BP & FMCTI during assembly & test phases of Subsea Trees, IWOCS, Manifold, PLETS & Jumpers - individual components & assemblies.

Jun 2000 -Aug 2003 - BP Horn Mountain SS Tieback to a Spar Host
Subsea Equipment Engineer – Subsea wellheads tied back with air can tensioned risers to Surface Wellheads – Collaborated with FMCTI & ABB Vetco Gray – coordinated engineering, manufacturing and test phases of the Vetco Gray subsea tieback connectors, RTI Riser connectors and the FMCTI surface wellheads.

FMCTI Houston – Employee
Nov 1996 - May 2000 – Shell Deepwater Projects
FAT/SIT Manager - Shell Mensa, Angus, Macaroni & Europa Projects
Managed FAT/EFAT/SIT phases of Mensa subsea manifold and multiple project trees

Sonsub International, Houston - employee

Mar 1993 – Oct 1996 – Shell Popeye
Project Manager - Concentric Workover Riser System & IWOCS

Feb 1990 - Feb 1993 - Exxon Zinc Subsea Template Production System Subsea Equipment Engineer - Responsible for coordination of all ROV Aspects for Manifold, Trees, Flowline Connections & Controls Interfaces through engineering, manufacturing/Assembly/Testing and offshore installation phases.

Vetco Gray Singapore- Employee

Oct 1988 – Jan 1990 – Manager - Project Sales
Prepared technical and commercial proposals for various SEA clients for various field development concepts using Vetco’s subsea production equipment.

Vetco Gray Ventura – Employee #1080
Subsea Project Manager/
Various Projects
Mar 1973 – Jan 1990

Project Summaries:

1987 - Bombay High – Project Manager for Field Installation Phases & Commissioning of SS Template Production System including subsea trees, manifold and EHMX read-back instrumentation system.


1985/86Chinese Petroleum Corp. (CPC) Offshore Gas Field – Taiwan Strait

Project Manager for subsea and surface wellhead completions, controls system and umbilicals including downhole equipment supply & Field Installation - Taiwan Strait

Noteworthy is that, because all subsea wells were predrilled by floaters in advance, the project was brought on stream in less than one year after subsea equipment order placement from EPC Contractor VetcoGray, who was responsible for supplying downhole well completion equipment in addition to the subsea satellite trees, subsea tieback equipment in combination with platform jacket completions including controls. Refer to 1987 OTC Paper 5362 and “Subsea Solutions Speed First Gas for Taiwan” Offshore Engineer – September 1987 for details.

1984 – 1985– Supported Vetco Training Dept. – Authored, organized and presented Courses on Offshore Production/Subsea Completion – Travelled Worldwide, Statoil, Stavanger, Norway, VG Jakarta, Indonesia, Unocal Balikpapan, Shell Brunei, VG Singapore, VG Aberdeen, Scotland, VG Hayes, London England, VG Houston, TX.

1978 /1983 - 10 well SS Template Production System –
Petrobras - Enchova/Bonito – Campos Basin, Offshore Brazil
Project Manager
– From Concept initiation through Engineering Design, Manufacturing, Assembly, Test and Field Installation. – Teamed with Petrobras for offshore installation and commissioning through phases 3 & 4 of the project – Resident engineer in Brazil 1982 & 1983. OTC paper & presentation 1979. Various publications & presentations about the system.

Early 1978 – Managed the technical proposals group for preparation of conceptual solutions for multiwell subsea production systems using Vetco Offshore’s product line including wellhead equipment, valves, manifolds, production trees and control systems.

1975 – Presented seminar on subsea production to ONGC, Bombay, Delhi, and Dehra Duhn (HQ), India.

Qualification & Affiliations

  • B.S., Mechanical Engineering, California State Polytechnic, San Luis Obispo, CA

  • Licensed Professional Engineer, Texas TBPE 87986

  • Marine Technology Society - 22460

  • Society of Petroleum Engineers - 0675736


  • “A Ten Well Subsea Production System for the Enchova Field” Co-authored and presented OTC paper no. 3448, - 30 April-3 May, 1979 L. E. Reimert, D. J. Gray, Vetco Offshore, & Z.L. Machado of Petroleo Brasileiro, S.A.

  • “Enchova Production System - A Model for Future Development “Petroleum Engineer International - March 1981 Dudley J. Gray

  • “Subsea Trees Flourish in Brazilian Fields” Offshore Engineer – Feb 1984 – Dudley Gray of Vetco and Zephyrino Machado Filho of Petroleo Brasileiro

  • “Design and Operating Experience with the Petrobras Enchova Template Production System” Co- authored and presented Petroleum Society of CIM Paper No. 84-35-91 - June 10-13, 1984, Calgary, Canada D. J. Gray & G. Murray Vetco Offshore

  • “Petrobras Enchova/Bonito Production System, Design and Operating Experience” Authored and presented CORE Paper (Canadian Offshore Resources Exposition) Oct 16-18, 1984 Halifax, Nova Scotia, Dudley Gray – Vetco Offshore Inc.

  • “Subsea Facilities for Floating Production Systems” Author: Dudley J. Gray – Seminar on Floating Production Systems – Nov 19-20, 1985 Presented to Memorial University of Newfoundland and NOIA, St. John’s Newfoundland

  • “Unique One Year Development of an Offshore Gas Field: CBK Field Project” 1987 OTC Paper 5362 Overview of a shallow water 9 well development using combination of platform tiebacks of pre-drilled subsea wellheads, coupled with 3 satellite subsea wells installed with diver assistance.

  • “Subsea Solutions Speed First Gas for Taiwan” Offshore Engineer – September 1987 – Dudley Gray – VetcoGray Hughes

  • “Is Standardization The Key?” Subsea Engineering News, Vol. 34 No 10 May 25, 2017, - Dudley Gray, Craig Hume and Ron Ledbetter, INTECSEA, Inc. Houston

  • “Subsea Production Systems” PowerPoint Training Presentations to Various Ghana Petroleum Co. and Engineering Universities, April 2-April 13, 2017, Dudley Gray, INTECSEA/Advisian, Mike Telly and Emmanuel Igbanaka, WorleyParsons Atlantic Engineers, Accra, Ghana

    DJG USA Passport has multiple entry Business Visa to Ghana valid from 5 May 2017 to 5 May 2021.

    Hosted by Augustine Felli, Gen. Manager - WorleyParsons Atlantic Engineers and Dorene Afenya.
    1. 3 Apr 17 WorleyParsons Atlantic Engineers, Accra, Ghana
    2. 4 Apr 17 Petroleum Commission, Accra, Ghana
    3. 5 Apr 17 Ghana National Petroleum Corporation, Accra, Ghana
    4. 6 Apr 17 WorleyParsons Atlantic Engineers, Accra, Ghana
    5. 7 Apr 17 Univ. Science & Tech. Kumasi, Ghana
    6. 10 Apr 17 WorleyParsons Atlantic Engineers
    7. 11 Apr 17 Univ. of Mines, Tarkwa, Ghana
    8. 12 Apr 17 Takoradi Tech. Univ., Takoradi, Ghana


Team player, adept at networking and coordinating with others

Intimate familiarity with Subsea Completion/Production Equipment

Inventive - aptitude with mechanical devices design & reduction to practice

Patent 3,517,632-Torsion Bar Suspended Boat - Pictured at 40 mph w/40hp outboard

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