Open Hole: Inflate Straddle
The Inflatable Packer System isolates an open hole interval. It can be configured with one (Bottom Hole) or two packers (Straddle). The Inflate Straddle configuration is capable of multiple resets allowing independent testing or treatment of multiple intervals with one trip in the hole. Right hand rotation of the drill pipe or tubing at 20 – 60 rpm for 30 to 45minutes drives the Inflate Pump, which draws filtered annular fluid (drilling or completion fluid) through the Suction Screen and inflates the packers. Upward pull opens the Inflate Release deflating the Upper and Lower Packers. The process can be repeated for multiple intervals.
Northstar’s Inflatable Packer System is equipped with an integrated Bypass passage equalizes pressure above and below the interval to maintain well control (overbalance) and prevent skidding during testing and prevent swabbing while tripping in/out of hole.
Benefits
- Resets - Multiple tests with one trip
- Lower Isolation – Isolate and independently prove reservoirs
- Can test far off bottom after the well total depth is achieved (TD)
- Seals in large wellbore washouts
- Continuous rotation prevents differential sticking - Best for deviated open hole
Deliverables
- Formation Pressure (P*) and temperature charts for Pressure Transient Analysis (PTA)
- PTA Deliverables: Permeability (k), damage/skin, Deliverability, Flow Regime, Reservoir Boundaries
- Production Rate - Gas and liquid
- Downhole reservoir fluid samples
Specifications
- Packer pressure differential: 5,000 PSI
- Absolute pressure: 8,000 PSI
- Temperature: 140 C / 284 F
- Hole sizes: 6.125” to 12.25”
- Wash-out: 30%
- Deviation: up to 90°
- Interval size: 1.58 to 40 meters
Find information on any of our DST services.
Solutions recently used in geothermal
