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

Solution for production gain by 20% against formation pressure decline

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

Solution for production gain by 20% against formation pressure decline

During the operation of wells, the reservoir pressure declines permanently in the absence of pressure maintenance systems. It leads to a decrease in producing ability of well, and the initially installed equipment cannot effectively adapt to these changes and fully compensate for the production loss. Consequently, the production rates go down, and premature failures of the submersible equipment multiply the number of repairs, ultimately leading to operating company profit drop.

Normally, the companies exercise two approaches to pressure decline:

The equipment depth-setting activities may become more difficult due to the dimensions and impossibility of operating in deviated sections to achieve the desired setting depth. 

When deployment, a decrease in bottom-hole pressure is possible, which leads to a boost of drawdown and inflow. But this process is followed by the additional appearance of solids content and a large amount of free gas, which leads to premature failures of standard equipment.

A new solution, developed by engineers at Lex, is the Jet ESP 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 annular space to tubing, decrease annular and, consequently, bottom-hole pressures, thus producing the 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 speed cuts down the length of the UHS ESPTM 3 times compared to standard equipment. It provides more considerable depths in deviated sections (including below the perforation zone) and brings the bottom-hole pressure down, consequently increasing the drawdown. Modular design and hard alloys quadruple the resistance to solids compared to standard equipment.

The introduction of the solution by Lex can allow our customers to cut down on their OPEX by 30% and increase avg 20% production gain per each well, as well as reduce the specific power consumption by 60%.

All solutions

Related products

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 stables the pump operation and increases the drawdown. A Jet pump and UHS ESP™ run in a single completion string are very effective against high gas content, as reducing bottom hole pressure, and gain the well production.

Ultra-High-Speed ESP (UHS ESP™)

Ultra-High-Speed ESP (UHS ESP™)

Lex Ultra-High-Speed ESP (UHS ESP™), driven by a permanent magnet motor (PMM) and having an operating speed range from 1,000 to 12,000 rpm, is unrivaled worldwide. Due to its high nameplate operating speed of 10,000 rpm, the length of the UHS ESP™ is 2–3 times shorter than any conventional ESP. The efficiency of the Permanent Magnet Motor exceeds 91%, the use of hard-alloy materials gives our modular pump the abrasion resistance up to 2,000 ppm (2,000 mg/l).

Universal Permanent Magnet Motors

Universal Permanent Magnet Motors

We develop and continually improve Lex Universal Permanent Magnet Motor (Universal PMM) technology, an alternative way to provide rotational energy for electrical submersible, screw or sucker rod 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).