Lex – Solution for production gain by 20% against formation pressure decline

Solution for production gain by 20% against formation pressure decline

Reservoir depletion and the decline of non-compensated formation pressure can dramatically decrease the production rates and complicate well output. The accumulation of highly pressurized gas in casing space and high line pressures contribute to this attenuation. We have developed a solution that returns the separated gas from the casing space into the tubing: the Jet ESP artificial lift system by Lex can increase the production rate by up to 20%.

Solution for production gain by 20% against formation pressure decline

During the operation of wells, reservoir pressure declines year on year in the absence of pressure maintenance systems. This leads to a decrease in the production ability of a well. Standard equipment cannot effectively adapt to these changes and fully compensate for the production loss. Consequently, production rates go down, and premature failures of the submersible equipment mean more repairs, ultimately leading to a drop in operating company profit.

Normally, organizations exercise two approaches to pressure decline:

Depth-setting activities may be more difficult due to well dimensions or deviations, making it challenging to get equipment to the desired depth. 

During this process, a decrease in bottom-hole pressure is possible, which can lead to a boost of drawdown and inflow. This process is often followed by the appearance of additional solids content and a large amount of free gas, leading to premature failure of standard equipment.

A new solution, developed by engineers at Lex, is the JetESP artificial lift system, which consists of the UHS ESPTM and a jet pump mounted on one tubing string. The technology returns the separated gas from the annular space to the tubing, decreasing annular and, consequently, bottom-hole pressures. This results in an increased inflow.

The Ultra-High-Speed ESP with the PM Motor can rotate up to 12,000 rpm to produce a wide operating range, allowing the pump to maintain maximum performance within the set operating limits even faced with an unstable inflow. 

High rotating speeds cut down the length of the UHS ESPTM by three times compared to standard equipment. It also allows access to greater depths in deviated sections (including below the perforation zone) and brings the bottom-hole pressure down, consequently increasing the drawdown. Its modular design and hard alloys quadruple the resistance to solids compared to standard equipment.

This solution by Lex allows our clients to cut down on their OPEX by 30% and increase production gain by an average of 20% per well. The synergetic efficiency of each piece of UHS ESPTM reduces specific power consumption by 60%.

All solutions

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ESP with Jet Pump (Jet ESP)

ESP with Jet Pump (Jet ESP)

To improve production gain from gassy wells, we designed the ESP with a jet pump (Jet ESP). The Jet ESP stabilizes the pump operation and increases the drawdown by reducing the bottom hole pressure. A jet pump and UHS ESP™ are being installed in a single completion string and are very effective in wells with high GOR, installed packer or in case of surface check valve failure.

Ultra-High-Speed ESP (UHS ESP™)

Ultra-High-Speed ESP (UHS ESP™)

We’ve developed our innovative PMM-driven Ultra-High-Speed ESP (UHS ESP™) with an operating speed between 1,000 and 12,000 rpm. UHS ESP™ provides effective operation in harsh well conditions, with limited power supply, and below perforation range.

Universal Permanent Magnet Motors

Universal Permanent Magnet Motors

We develop and continually improve Lex Universal Permanent Magnet Motor (UPMM) technology - an alternative way to provide rotational energy for electrical submersible pumps. Lex features a product range of Lex UPMM from 85 to 12,000 rpm operating speeds, high efficiency up to 95%, operational flexibility, lower motor heating rise, stable operation at any frequencies, and high-temperature environments up to 392 °F (200 °C).