March 2021

www.hpmag.co.uk HYDRAULICS & PNEUMATICS March 2021 19 down point, coupled with EDM machined (patent pending) outlet sub gives the jet pump a marked advantage over other types of hydraulic artificial lift. Energy saving A significant cost of lifting a barrel of fluid from a well is the energy used. In a Wanner Hydra-Cell jet pump hydraulic artificial lift solution, energy is used to drive the surface power fluid pump. Therefore, the overall efficiency of the power fluid pump is very important. The Hydra-Cell Seal-less, no packing, API 674 positive displacement pumps have efficiencies of over 90%. With Wanner Hydra-Cell’s jet pump solution, an energy saving of US$230,000 could be achieved over three years when compared to multistage centrifugal pumps, assuming production is running 24 hours per day, 365 days per year, with the power fluid pump running at 3500 psi at 4500 bpd and a cost of electricity of $0.11 per kwh. Maintenance and servicing saving 80% of pump maintenance is created by dynamic seals operating in the pumped liquid. The seal-less, no packing design of the API674 Hydra-Cell reciprocating pump results in very low servicing costs, and more importantly unscheduled maintenance. Hydra-Cell’s ability to pump liquids with suspended solids of 0 to 800 microns up to 10% (100,000 ppm) reliably, and the ability of the pump to run dry, infinitely without damage, helps to keep unscheduled maintenance extremely low; lower than any other pump technology. These attributes also help to keep installation simple and costs low: no separate lubricators, or site services for lubricators, no seal flushing and no fine filtration needed. $21,000 in maintenance costs could be saved over 3 years compared to traditional plunger pumps. Other benefits of the jet pump include heavy-duty materials to ensure long life even in harsh environments and no moving parts within the well that could be damaged or wear. The patented diaphragm position control protects the diaphragm under suction vacuum conditions, such as a blocked suction line. This results in lower lifetime costs for the operator and reliable and optimised production. Wanner downhole jet pumps can be easily retrieved hydraulically and circulated to the surface by reversing the flow of the power fluid; the jet pump can be retrieved without pulling the tubing. This ensures easy maintenance and a longer service life; no change out at total completion, no work-over or pulling rig needed, greatly saving costs on servicing equipment. The jet pump technology is further optimised through the Wanner Pump Analyser software, which enables the engineer to create simulations to optimise production based on specific well conditions. With multiple combinations for nozzle and throat sizes to suit surface and sub surface conditions, the Wanner Pump Analyser enables the selection and recommendation of a solution designed to optimise to each plant’s oil and gas well production. The pump analyser has ground up review of hydraulic mathematical models for better optimisation and can track well performance over time. Furthermore, the ability to supply custom profiles to fit customers’ existing completions enables lower cost of implementation and greater ease to switch from other forms of artificial lift. www.wanner-hydraulic-lift.com