Advancements in Hydraulic Dewatering Technology

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Jonah Tucker
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1 Advancements in Hydraulic Dewatering Technology 7th European Gas Well Deliquification Conference Presented By: David Bolt Cormorant Engineering

Hydraulic Dewatering Introduction and History 2 Hydraulic De watering is not new, and dates back into the early 1900 s For many wells there are other technologies which are more cost effective and

2 Hydraulic Dewatering Introduction and History 2 Hydraulic De watering is not new, and dates back into the early 1900 s For many wells there are other technologies which are more cost effective and hydraulic pumping has been primarily used in pumping oil using a Kobe style pump Todays Gas wells present challenges which have made Hydraulic pumping a desirable technology Cormorant Engineering is focused on this technology and continues to advance the performance, cost effectiveness, and life

3 Hydraulic Dewatering Technology Downhole Pump Designs Single Acting Power fluid driving reciprocating pump one direction, restoring force by hydrostatic head difference Dual Acting Power fluid driving the pump both directions Pulse Pumps Either single or dual action pumps with switching valve on surface, sending pressure pulse downhole each stroke Self Reciprocating Pump Dual action pump with directional switching valve downhole Other hybrid designs Surface Equipment Typical hydraulic power unit Power fluid Closed system Power fluid makes a complete loop from HPU downhole and back to the HPU Water based power fluid Open system Power fluid mingles with the production fluid on the return

Hydraulic Dewatering Technology We have focused on improving: The production rate limitations of Pulse style pump The costly completions of Kobe style pumps Life of Kobe style pumps Cost of

4 Hydraulic Dewatering Technology We have focused on improving: The production rate limitations of Pulse style pump The costly completions of Kobe style pumps Life of Kobe style pumps Cost of deployment and retrieval Deep Wells with small bore completions The result of these efforts has created two new pump design concepts: The first conceived by Bert Lugtmeier of Shell Nam and further developed by Cormorant is: Single Line Up Reciprocating Pump or (Shell Patent Pending) The second is the Cormorant HG Pump S L U R P

5 SLURP Pump Pulse style pump running with Produced water as the power fluid Power one direction stroking a piston and compressing a Nitrogen spring Nitrogen spring returns the pump piston and water plunger Deployed via 2 inch coiled tubing with BHA on end Pump is wire line retrievable

6 Operation Power Stroke 1. Apply pressure from surface 2 Piston forced down, compressing the Nitrogen and forcing the water from the water pump section PRESSURE APPLIED PISTON DIRECTION NITROGEN WATER FORCED FROM BARREL

7 Operation Return Stroke 1. Release pressure from the surface 2. Piston forced upward due to the compressed Nitrogen 3. Water is drawn through the gas anchor, standing valve and into the pump barrel Pressure Released Piston Direction Water Enters from Formation NITROGEN

8 SLURP - Performance Cormorant Adapted their predictive model to accommodate the SLURP Based on the Cormorant Finite Element Work in a 3500 m well Production rates are: 2-4 m^3 per day

9 SLURP Status and Next Steps Basic design modeling is complete Basic Solids model complete Next steps: Detail Design engineering Detail Design Prototype build Surface Equipment Design Timing: Prototype testing planned for Q2 2014

HG - SRP Pump is a dual acting Self reciprocating pump Deployed via Coiled tubing Single in US Concentric in Europe Pump is retrievable simply by reversing the direction of the fluid flow

10 HG - SRP Pump is a dual acting Self reciprocating pump Deployed via Coiled tubing Single in US Concentric in Europe Pump is retrievable simply by reversing the direction of the fluid flow Incorporates a self reciprocating valve function Production rates into 100s of barrels per day Improves life over previous Kobe pumps by: Metallurgical improvements in the valve technology Improved design characteristics of valve operation Ceramic valve parts CFD developed flow regimes for energy optimization as well as run away control

11 HG - SRP Water section is basic Rod Pump Pump area ratios allow for a low surface operating pressure for deep wells Maximum surface pressure 3000 psi for equipment life and reliability Construction materials well dependent H2S, CO2, Ph, etc.

12 HG SRP Completion Uses 2 3/8 Production tubing with pump seating nipple Or 2 ¼ in coiled tubing with PSN installed 1.75 Coiled Tubing with Bottom Hole assembly BHA sits in PSN Incorporates a Standing Valve Gas Anchor Screen Pump is deployed by circulating water in the Coiled Tubing and pumping the pump in Production tubing or Coiled tubing Pump Seating Nipple Coiled tubing with bottom hole assembly and Standing Valve

13 HG SRP Pump Retreival Retrieve pump by pumping water through the Tubing x Tubing annulus Pump travels to surface and is caught in API lubricator Production tubing or Coiled tubing Pump Seating Nipple Coiled tubing with bottom hole assembly and Standing Valve

HG Surface System Simple surface unit Main Components Medium pressure water pump 3000 psi (200 bar) Chemical injector pump if necessary for well / pump life Set

14 HG Surface System Simple surface unit Main Components Medium pressure water pump 3000 psi (200 bar) Chemical injector pump if necessary for well / pump life Set of valves directing power fluid for pumping or retrieval Pump inlet filter which back flushes during retrieval Pump power is programmable for desired pumping rate

15 HG SRP Development Timing Downhole pump prototype complete Testing on going for life and reliability Surface System Pump development underway Ready for deployment Q2 2014

16 End of presentation

The Lease Pumper s Handbook CHAPTER 8 HYDRAULIC LIFT

8-i The Lease Pumper s Handbook CHAPTER 8 HYDRAULIC LIFT A. Introduction to Hydraulic Lift 1. Principles of Hydraulic Lift. 2. Designing and Installing Hydraulic Lift Systems at the Wellhead. 3. The Insert