Liner Wiper Plug

The Liner Wiper Plug (LWPC) is a specialized downhole tool designed for liner cementing operations, primarily used to separate cement slurry from displacement fluids, wipe the inner wall of the liner clean, and ensure complete displacement during the cementing process. Our product integrates advanced sealing mechanisms and robust construction, making it suitable for a wide range of well configurations, from conventional vertical wells to complex horizontal and multilateral completions. Whether for shallow water wells, deep oil and gas reservoirs, or specialized geothermal projects, our Liner Wiper Plug delivers consistent and reliable performance.

1.Precision-Engineered Sealing System : Equipped with sophisticated sealing mechanisms and flexible cup-like extensions, our Liner Wiper Plug creates a positive, leak-proof barrier between drilling fluids and cement slurry, effectively preventing contamination and ensuring complete displacement of fluids during cementing operations. The unique profile of the wiper element is optimized through extensive testing to achieve optimal sealing performance without requiring excessive pump pressure.

2.Robust & Durable Construction : Manufactured using high-grade polymers, composite materials, elastomers (including nitriles and HSN), and high-grade aluminum, our Liner Wiper Plug is built to withstand high-temperature (HT) and high-pressure (HP) downhole environments. The robust design ensures reliable performance even in the most challenging well conditions, while the drillable materials allow for rapid and easy drill-out with a PDC bit after cementing completion.

3.Versatile & Adaptable Design : Available in multiple configurations to accommodate different liner sizes and cementing scenarios, our Liner Wiper Plug is highly versatile for diverse well types - including vertical, horizontal, multilateral, shallow water, deep reservoirs, and geothermal wells. It can be customized to meet specific well conditions and operational requirements, making it a flexible solution for various oilfield applications.

4.Superior Wiping Performance : The enhanced wiping action of our Liner Wiper Plug effectively removes residual drilling fluid from the liner wall, improving cement bond quality and ensuring optimal zonal isolation - a key advantage over traditional dart systems which only provide basic fluid separation. This superior wiping capability reduces the risk of cementing failures and enhances well integrity.

5.Safe & Reliable Operation : Designed with safety as a core priority, our Liner Wiper Plug features a positive latch mechanism that provides reliable indication of proper placement, reducing uncertainty during critical cementing operations. It prevents cement reentry into the liner by latching and sealing into the landing collar, acting as a backup seal for floating equipment and ensuring stability during well production. The tool is easy to install and operate, minimizing the risk of accidents and downtime.

The Liner Wiper Plug is attached to the shear pin adapter (or shear screw adapter) as the last item in the mechanical or hydraulic setting string. During cementing operations, the plug is pumped down the liner, following the cement slurry. As it moves forward, its flexible cup-like extensions expand and conform to the inner wall of the liner, creating a tight seal and wiping away residual drilling fluid. Once it reaches the landing collar, the plug's positive latch mechanism engages, locking it securely in place to prevent upward movement during well production and providing a reliable backup seal. After cementing is complete, the plug can be easily drilled out with a PDC bit, allowing for seamless continuation of well operations.

Our Liner Wiper Plug is widely used in oil and gas well completion operations, specifically in liner cementing processes. Its versatile design makes it suitable for :

- Conventional vertical oil and gas wells

- Complex horizontal and multilateral well completions

- Shallow water and offshore oilfield operations

- Deep oil and gas reservoirs with high temperature and pressure

- Geothermal well projects

- Wells requiring strict zonal isolation and cement bond quality

Q: What is the main function of a Liner Wiper Plug?

A: The main function is to separate cement slurry from displacement fluids during liner cementing operations, wipe the inner wall of the liner clean to improve cement bond quality, and provide a reliable seal to prevent cement reentry and fluid contamination.

Q: Is the Liner Wiper Plug drillable?

A: Yes, our Liner Wiper Plug is made of PDC drillable materials (including high-grade aluminum and specialized polymers), allowing for rapid and easy drill-out after cementing completion without damaging downhole equipment.

Q: Can it be customized for different liner sizes?

A: Absolutely. We offer multiple configurations to accommodate liner sizes from 2-7/8" to 13-3/8", and we can also customize the plug to fit specific liner sizes and well conditions based on your requirements.

Q: What downhole conditions can it withstand?

A：Our Liner Wiper Plug is designed to withstand high-temperature (up to 180°C) and high-pressure (up to 15,000 PSI) environments, making it suitable for deep reservoirs and harsh downhole conditions. Customized versions for even more extreme conditions are available upon request.

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