Jet Pump Advantages
|Horizontal & Deviated Wells
Horizontal well drilling and completion techniques are changing the oil and gas industry yet until recently, well production technology has not kept pace with this evolution. In order to maximize the benefit of horizontal well technology, what is needed is a reliable horizontal production system. Rod pumped systems (plunger pumps and progressive cavity pumps – PCPs) will typically experience terminal mechanical wear, resulting in frequent failures and servicing requirements. PCPs are also limited in the range of API oil quality in which they can be used, and much of the new horizontal production development going on is above the range for these pumps. While electric submersible pumps (ESPs) are technically viable for horizontal installations, cost, low efficiency and poor run life typically prevent their widespread use.
With no moving parts, the SREP jet pump takes the industry to the next level, allowing for jet pump placement anywhere in the horizontal profile. Using power fluid as the drive mechanism of a jet pump, the system has no problems with deviated, crooked or horizontal wellbores.
With a jet pump landed in the horizontal section of a well, operators are not only able to achieve higher inflow rates, they are also able to achieve higher ultimate reserve recovery.
|‘Rig-less’ Pump Changes
The unique design of the SREP jet pump offers a very important servicing capability that operators using conventional pump systems can’t even dream of. The heart of the jet pump is a carrier sub which contains the venturi nozzle and throat. If for any reason these parts need to be serviced, retreival is a fast and simple one man operation – done by reversing the system flow direction and reversing the carrier out of the wellbore. Reinstallation is done simply by loading the carrier back into the wellhead and pumping it back into place.
With the wellhead configured for easy reversing and tool capture – pump inspection, parts replacement or system optimization changes are a one man job, typically performed within a 1 hour service time.
At SREP, we have also developed a jet pump cleaning tool, which can be deployed and retrieved in this same manner, allowing us to flush clean the internal components of the jet pump body.
|High Efficiency Jet Pumps
Historically, jet pump technology has been found to be relatively inefficient. This meant that limit fluid production rates and well drawdown could be achieved, and large, high horsepower surface packages were required. With the SREP jet pump process, we are able to achieve significantly more efficient lifting performance – typically achieving lift efficiency rates similar to comperably sized rod pump systems.
Two important factors in this performance are the patented intake flow geometry of the jet pump and the analysis software and techniques employed to optimize the nozzle / throat selection. These two factors have allowed SREP jet pumps to operate at 50 to 65% lower energy requirements that seen with first generation jet pump systems.
|Pad Well Systems
Horizontal well technology and land use management concerns have greatly increased the interest in grouped, or pad well development strategies. The flexible “power delivery” features of jet pump systems allows operators a great deal of flexibility. The multi-point delivery of pressurized fluid is very easily accomplished, therefore allowing operators to supply several wells from one jet pump surface facility.
SREP leads the industry with our multi-well jet pump solutions, designing and building a range of equipment options, tailored to suit each operators pad well development program needs. Our equipment package strategies, coupled with our well optimization engineering allow operators to keep their wells performing at maximum inflow rates, while minimizing the capital outlay for equipment. Our systems are modularly designed, allowing them to be easily redeployed as the lifting horsepower needs change.
|Sand Handling Capabilities
Sand inflow is a common problem for conventional rod pumps and ESPs. Wellbore sand can either come directly from the rock matrix within the reservoir, or, as is very common with horizontal multi-zone complettions, it will come from the large quantity of sand pumped during the fracturing operations. With a mechnaically driven production pump, the moving parts are always at risk of rapid abrasion failure when sand is present in the produced fluid. Plungers, barrels, rods and tubing are common failure points. Sand can also often plug the production tubing string causing the pump to fail.
In an SREP jet pump, there are no downhole moving parts. The jet pump venturi is activated by pumping fluid. The components that face the errosive fluid flow are built out of suitable durable materials and others are hard coated to prevent erosion. Again, the “rigless pump change” features of our jet pump systems allows operators to easily change out any of the components that may see errosive wear.
Also, because a jet pump works by fluid circulation, sand transport is very effective and therefore sand plugging is rare.
|Gas Handling Capabilities
Wellbore gas inflow is often problematic for conventional pumping systems. Rod pumps can gas lock, PCPs can experience stator swelling and lock-up, and ESPs can overheat and fail.
Across a range of bottomehole pressure (BHP) conditions and gas / liquid ratios (GLRs), jet pumps are quite capable of producing fluids with entrained gas. Our engineering process is cabable of analyzing to determining the lift performance we will be able to achieve, and to plan for a completion design which will perform best with the GLR and BHP conditions.