Pump Cleaning Mode for Linear Rod Pumping System

Transcription

1 Gas Well Deliquification Workshop Sheraton Hotel, February 20 22, 2017 Pump Cleaning Mode for Linear Rod Pumping System Dan Senesac, Product Specialist Ron Peterson, Development Engineer Regal

2 LRP Linear Rod Pump Overview LRP Linear Rod Pumping Unit Pumping Unit for Sucker Rod Electromechanical (Not Hydraulic) Small Size and Weight Safety -- No Exposed Moving Parts or Pinch Points Ease of Transportation / Installation Visually Appealing Quiet Operation 2

3 Linear Rod Pump Overview Replaces Traditional Pumping Unit 3

4 Linear Rod Pump Overview Examples 4

5 Linear Rod Pump Overview Examples 5

6 Linear Rod Pump Overview Slant Mount 6

7 Linear Rod Pump Overview Well Completion Conventional Well Completion with Traditional Downhole Sucker Rod Pump Traditional Wellhead Traditional Stuffing Box Casing and Tubing Mount Options Available (Casing Mount Most Common) Mounting Stand Allows Access to Wellhead 7

8 Linear Rod Pump Overview LRP Mechanical Design Rack and Pinion Reciprocates the Rod-string Gearbox Reversing AC Motor Wellhead Mounting Stand 8

9 Linear Rod Pump Overview LRP Mechanical Design Polished Rod Thru Rack Polished Rod Clamp on Top Optional Push Device Allows Rod to be Pushed Down Rack and Pinion Oil Bath Rod Rotator Option 9

10 Technical Specs 10

11 Technical Specs 11

12 Technical Specs 12

13 Linear Rod Pump Features LRP Control Features Digitally Adjustable Stroke Positions with Optional Periodic Pump Tag Programmable Velocity Profile with Independent Accel, Decel, Velocities Pump Soft Landing / Reduce Fluid Pound SPM Control Based on Well Inflow Bridle Separation Control Downhole Equipment Protection Pump Clean Mode (Patent Pending) 13

14 Pump Clean Mode Background Trash in Pump Causes Tv to Stick Open No Flow Condition is Often Misunderstood and Misdiagnosed as Gas Lock Common Problem Sometimes it Clears by Itself, Often not Remedy may Require a Crew to Bump Down or use Flush Truck 14

15 Pump Clean Mode Trash in Pump Dynamometer Plots go Flat Line If Effective Pump Load is Zero, then Tv is Stuck Open If Effective Pump Load is Fo, then Sv is Stuck Open 15

16 Pump Clean Mode Automated Method to Restore Pump Action Respectable Success Rate, Depending on Nature of Problem Does not Resolve Severe Obstruction or Damaged Valve Executed Locally, Remotely, or Automatically Occurs Once per Day Duration is Approximately Two Minutes 16

17 Pump Clean Mode Pumping Unit Strokes at Full SPM with Superimposed Motor Vibration Direct Coupled, Low Inertia Mechanism Makes the Vibration Effective Stroke Length is Varied to Achieve a Frequency Sweep Targeting the Rod Resonant (Synchronous) Frequency Dynamic Forces / Pressure Disturbance Restores Valve Action no Tagging Necessary 17

18 Pump Clean Mode Adjustable Acceleration / Deceleration Rates During Pump Clean Mode Shock Loading is Constrained Well Below Mechanical Gear Train Safe Limits Not as Aggressive as You Might Imagine 18

19 Results Field Case 1: Stuck Open Tv After Pump Clean Mode 19

20 Results Field Case 1: Stuck Tv: After Pump Clean Mode: 20

21 Results Field Case 2: 21

22 Results Field Case 2: Stuck Tv: After Pump Clean Mode: 22

23 Traditional Pumping Unit Pump Clean Mode Also Available in Traditional SRP Pumping Unit Software Different Technique Stuck Pump Mode Also Available in SRP More Information Available Upon Request 23

24 Gen III Mechanical Design 24

25 Gen III Gen III Advancements Stronger One Piece Pinion Box O-ring Machined Flanges Refined Gear Profile One Piece Guide Double Sealed Gearbox Input One-way Clutch Brake Option Easy Disassembly 25

26 Gen III Tandem Unit Dual Pinion and Motor for Added Lift Capacity 26

27 Gen III Dual Completion Unit Production from Two Separate Zones 27

28 LRP Pump Clean Mode Thank You! 28

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