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June 3 - 7, 2019
2019 Gas-Lift Workshop
1
Gas Lift Failures and Worst Practices
41st Gas-Lift WorkshopHouston, Texas, USAJune 3 - 7, 2019
June 3 - 7, 2019
2019 Gas-Lift Workshop
2
Agenda
Introductions (15 min)Operational Issues (10 min)Application Issues (10 min)Design Issues (10 min)Equipment Issues (10 min)Wrap-up (5 min)
Ground Rules
We learn the most from our mistakes. So…What’s allowed:Things that failedWar storiesThings that seemed like a good idea at the time, but…Embarrassing / humorous storiesWhat’s not allowed:Success storiesBest practices. (If it starts to sound like a best practice, we will cut you off!)Have fun!!!
June 3 - 7, 2019
2019 Gas-Lift Workshop
3
Attendees
Greg Stephenson – OxyTony Hepp – BHGELuis Gonzalez – Xenon Lift SolutionsCorky Vickers – EncanaJavier Perez – VistaO&GLynnRowlan–EchometerZeke Medina – VerdunJoel Shaw –SilverwellEnergyAlex Malone – BHGE
June 3 - 7, 2019
2019 Gas-Lift Workshop
4
Attendees
CarlosOrosco– ChevronGaniyuAdeyemi– ChevronGaneshBalasubramanian– SLBKevin Rogers – SLBMarioOttulich– Vista O&GJuanPitz– Pan American EnergyHaidanLu – SLBTommy Hunt – JMIChandranPeringod– Shell
June 3 - 7, 2019
2019 Gas-Lift Workshop
5
June 3 - 7, 2019
2019 Gas-Lift Workshop
6
Operational Issues
High-rate Kick-off/UnloadingEroded ports and stem (esp. top valve)RP 11V5 19G5, cf. forthcoming gas lift handbookPetrowiki– good resourceWrapping valves in plastic wrap to protect them from sandEroding a mandrel having an empty pocketNumbering the valvesBy depth or according to installation sequenceUpside-down mandrels
June 3 - 7, 2019
2019 Gas-Lift Workshop
7
Application Issues
-Tortuous wells that compel operators to complete wells with gas lift-Gas lift redesign that does not account for offset well fracturing hits-Insufficient diagnostics before changing the lift method to gas lift
June 3 - 7, 2019
2019 Gas-Lift Workshop
8
Design Issues
-Valves spaced too far apart-Valves spaced too close together, e.g., the operating valve too close to the one above it-Vendor-designed completions with insufficient operator input-Designs not accounting for wells with long lateral sections-Using a conventional well gas lift design for an unconventional well-Wrong orifice size-Wrong set pressure-Relying only on valve force balance equation results instead of checking VPC data
June 3 - 7, 2019
2019 Gas-Lift Workshop
9
Equipment Issues
-Check valve spring rate too high or too low-Incorrect mandrel load rating(s) leading to collapse-Incorrect valve packing for the pressure, temperature, and well fluid chemistry-Valve connections not torqued to a specification-The appropriateness of using silicone in valve bellows
June 3 - 7, 2019
2019 Gas-Lift Workshop
10
Copyright
Rights to this presentation are owned by the company(ies) and/or author(s) listed on the title page. By submitting this presentation to the Gas-Lift Workshop, they grant to the Workshop, the Artificial Lift Research and Development Council (ALRDC), and the American Society of Mechanical Engineers (ASME), rights to:Display the presentation at the Workshop.Place it on thewww.alrdc.comweb site, with access to the site to be as directed by the Workshop Steering Committee.Place it on a CD for distribution and/or sale as directed by the Workshop Steering Committee.Other uses of this presentation are prohibited without the expressed written permission of the company(ies) and/or author(s) who own it and the Workshop Steering Committee.
June 3 - 7, 2019
2019 Gas-Lift Workshop
11
Disclaimer
The following disclaimer shall be included as the last page of a Technical Presentation or Continuing Education Course. A similar disclaimer is included on the front page of the Gas-Lift Workshop Web Site.The Artificial Lift Research and Development Council and its officers and trustees, and the Gas-Lift Workshop Steering Committee members, and their supporting organizations and companies (here-in-after referred to as the Sponsoring Organizations), and the author(s) of this Technical Presentation or Continuing Education Training Course and their company(ies), provide this presentation and/or training material at the Gas-Lift Workshop "as is" without any warranty of any kind, express or implied, as to the accuracy of the information or the products or services referred to by any presenter (in so far as such warranties may be excluded under any relevant law) and these members and their companies will not be liable for unlawful actions and any losses or damage that may result from use of any presentation as a consequence of any inaccuracies in, or any omission from, the information which therein may be contained.The views, opinions, and conclusions expressed in these presentations and/or training materials are those of the author and not necessarily those of the Sponsoring Organizations. The author is solely responsible for the content of the materials.The Sponsoring Organizations cannot and do not warrant the accuracy of these documents beyond the source documents, although we do make every attempt to work from authoritative sources. The Sponsoring Organizations provide these presentations and/or training materials as a service. The Sponsoring Organizations make no representations or warranties, express or implied, with respect to the presentations and/or training materials, or any part thereof, including any warrantees of title, non-infringement of copyright or patent rights of others, merchantability, or fitness or suitability for any purpose.

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