WHAT IS GALLOP?

GALLOP – Gas Assisted Liquid Lift using Oscillating Pressure
A dual tubing system with check valve(s) that can lift liquids from multiple points in a horizontal well bore without putting lift pressure on the formation

WELL SELECTION CRITERIA

Target liquid rates less than 50 BLPD
Access to lift gas at pressures suitable for GALLOP*
Low solids production, low chance for future frac interference
Uplift potential if well could be “pumped off”
A Sucker-Rod pump below the perfs in a vertical
Existing tubing preferred

HOW TO SPOT A LOADING PROBLEM?

Well is approaching min-lift rates anywhere in the wellbore
High frequency data shows surging or cycling gas rates
Decreasing (or zero) surface liquid yield (liquids are being left downhole)

FOUR STAGES PER CYCLE

FILL – Liquids in sump(s) fill horizontal section(s) of Dual Tubing (DT), check it open
GAS INJECTION – Pressurized gas is injected into one side of DT, check closes
LIQUID PRODUCTION – Lift gas drives liquid slug to surface, check closed
BLOW DOWN – DT pressure is relieved to flowline, check re-opens

MORE BENEFITS

GALLOP can defer P&A on problem wells
Ability to monitor performance in real time as cycle times are tuned
Keeps reserves on the books
Production pays for the system costs

TECHNICAL SPECIFICATIONS

Total Length – 68”
OD – 4 3/8”
Effecitive screen size – 4” Dia x 48” L
Sand Screen 100 micron
System Volume Flow Rate 3gpm
Added Centralizers

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PATENT INFORMATION 

GALLOP Protected under US Patent 8794305B2 & 9435163B2