Bag Filtration Housings for the Oil & Gas Industry

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Salt Water Disposal Well Bag Filtration

"For every barrel of oil produced an average of 3 to 5 barrels of water is consumed".

A salt water disposal well is a disposal site for water produced as a result of the oil and gas extraction process. Produced water, also referred to as salt water, contains particulate which can cause problems for the pump bringing water into the well. Prior to injection into a salt water disposal well, it is highly beneficial for water filtration to be installed before the pump to prevent damage.

In the world of Salt Water Disposal Wells, protecting the well from intrusion by solids is a key need. Filtering the high solids present in produced and flowback water to a low micron level prior to injection in a high Total Suspended Solids water condition has proven to reduce the time between acid cleanings and flowback cleanings.

Filter Sciences bag filter systems (AKA: filter pots, filter pods, bag filter vessels) eliminate the need for backwash and disposal of environmentally suspect liquid waste, such as salt water, which is considered a hazardous material. It also offers the flexibility of changing the micron rating by simply changing out the bags. Stainless steel bag filter housings from Filter Sciences offer top-of-the-line filtration. Stocking both 304 and 316 stainless steel.

Filter bag housing, Filter pots, filter pods, bag filter vessel

The Filter Sciences Bag Filtration Housing Difference

  • Stainless steel housing
  • Prevents corrosion
  • Prevents rusting
  • No backwash or flowback
  • No process fluid loss
  • No bypass or fluid leakage
  • The Zero Discharge Solution
Now that's a valve! Painted in the National colors of the U.A.E. at ADIPEC in Abu Dhabi.
Now that's a valve! Painted in the National colors of the U.A.E. at ADIPEC in Abu Dhabi.

Where Our Liquid Bag Filter Housings Are Used in the Oil & Gas Industry:

  • Hydraulic Fracturing
  • Salt Water Disposal Wells
  • Wastewater
  • Power generation
  • Oil Bypass
  • Environmental Remediation
  • Cooling Tower Water
  • Recycling Frac Water
Mobile trailer with twin 25 cell bag housings in 304 SST with duplexed 12" piping capable of filtering up to 9,000 GPM.
Mobile trailer with twin 25 cell bag housings in 304 SST with duplexed 12" piping capable of filtering up to 9,000 GPM.

Salt Water Disposal Wells - Superior Bag Filtration Housing Systems

In the oil and gas industry, the responsible management of produced water is a top priority. As a byproduct of extraction processes, produced water contains contaminants that must be effectively treated before disposal. Bag filtration has emerged as a vital technology in this realm, particularly in the context of saltwater disposal wells. This article explores the significance of bag filtration, its role in treating produced water, and the benefits it brings to saltwater disposal operations.

Produced Water Challenges:

Produced water from oil and gas extraction processes often contains a complex mixture of contaminants, including suspended solids, hydrocarbons, and various chemicals. Efficiently addressing these challenges is essential to safeguard the environment and comply with regulatory standards. Saltwater disposal wells, designed to inject produced water into deep geological formations, rely on advanced filtration technologies to ensure the injected water meets stringent quality requirements.

Bag Filtration Overview:

Bag filtration is a mechanical separation process that involves passing produced water through a series of porous filter bags. These bags, made of materials like polypropylene or nylon, capture suspended solids and other particulate matter, allowing for the production of clarified water suitable for injection into disposal wells.

Key Components and Operation:

  1. Filter Housing:
    • Bag filtration systems consist of a filter housing, which holds the filter bags in place. The housing is designed to withstand the high pressures and flow rates associated with produced water treatment.
  2. Filter Bags:
    • Filter bags are the heart of the bag filtration system. These bags come in various sizes and materials, each tailored to the specific needs of the produced water being treated. They effectively trap particles, preventing them from reaching the disposal well.
  3. Multi-Stage Filtration:
    • FSI Bag filtration systems often incorporate multiple stages with progressively finer filter bags. This multi-stage approach enhances the filtration efficiency and ensures the removal of particles of varying sizes.

Benefits of Bag Filtration in Saltwater Disposal Wells:

  1. Particle Removal:
    • FSI Bag filtration is highly effective in removing suspended solids, sediments, and other particulate matter from produced water. This is crucial in preventing well clogging and maintaining the integrity of the injection zone.
  2. Extended Well Life:
    • By preventing the injection of abrasive particles, bag filtration helps extend the life of saltwater disposal wells. Reduced wear and tear on well components contribute to prolonged operational efficiency.
  3. Compliance and Environmental Protection:
    • Bag filtration ensures that the quality of injected water meets regulatory standards. This not only protects the integrity of underground water sources but also safeguards surface water and soil from potential contamination.
  4. Cost-Efficiency:
    • The use of bag filtration systems can lead to cost savings by minimizing maintenance requirements and optimizing the performance of saltwater disposal wells.


Bag filtration plays a crucial role in enhancing the treatment of produced water for saltwater disposal wells. As the oil and gas industry continues to prioritize environmental sustainability and regulatory compliance, the adoption of advanced filtration technologies like bag filtration becomes increasingly important. By efficiently removing contaminants, bag filtration contributes to the overall success and longevity of saltwater disposal operations, ensuring that the industry remains responsible stewards of the environment.

Liquid Management in the Oil & Gas Industry

The oil and gas industry, namely hydraulic fracturing and salt water disposal wells, are using industrial filtration more than ever to filter liquids in various stages of the process.

While fracking is a hot topic, it is an industry that has been around for more than half a century, and though it uses an exorbitant amount of water, throughout the decades, new and innovative protocols have been developed to better conserve water.

Filter Sciences supports the fracking industry by providing them the technology to better filter and reuse water to aid in the conservation efforts. Join us in today’s post as we take a deeper look into industrial filtration and frac water management.

From Upstream and Midstream, All The Way to Downstream Applications

There are various stages that fracking uses water, let’s dive into each of them below.

Upstream Wastewater: Saltwater Disposal

Fracking requires the disposal of salt water or produced water and along with it, the removal of grit and sand.

Upstream, Midstream, and Downstream: Filtration
This stage requires filtration and integration for the elimination of solids, water, and oil.

Upstream: Fracturing Water
Fracking water is produced from water that needs to be further filtrated to remove other solids and particulates that may hinder the fracking process — filter bags employed typically go down to 10 microns.

The Frac Sand

When companies begin drilling, water and sand are infused to the ground at a very high rate to essentially crack open the shale, where the natural gas and oil are housed. The sand is also known as “proppant.”

The fracking sand is much different than the sand you find on a nice sunny beach, in that it needs to be cleaned, screened, and washed. Because the demand for sand is so high, it’s a continual process to create clean and uniform sand to be used in breaking the shale.

What is there to wash from the sand?

The sand is rinsed clean of any minerals and clays before it’s pumped into the drill site — from here, the water is further processed through a filter press at a high flow rate.

The Frac Flowback Water

As the water and sand are pumped into the ground at a high rate, the drilling hole eventually fills with water and sand. When this is complete, the drill exits, and the water and sand and forced through pressure to return to the surface. One way to imagine this is by filling a balloon with water. As the balloon expands and fills through water pressure it stays put, but once it’s removed, the water comes spraying back out! This is essentially the fracking flow backwater. Beyond what comes back to the surface, there is also water underground known as produced water.

The water that surfaces through the fracking process may contain sodium, heavy metals, magnesium, barium, calcium, radioactive materials, and hydrocarbons — this must all be filtered and purified before it can be reused. A typical frack job uses anywhere from three to five gallons and roughly one-third of that will return to the surface.

How water is both filtered and treated is important to the fracking industry because not only is it important to conserve and reuse water for ecological sustainability, it’s vital to keep the water safe, and particulate-free.


Fracking & Salt Water Disposal Well Filtration With Filter Sciences

At Filter Sciences, we provide an innovative, stainless steel filter bag housings that complement many filter media, making them work with the intricacies of the hydraulic fracturing industry.

Not only can we assist in the standard process of total suspended solids, particulate, and inorganic material, we can help guide your operation towards optimal efficiency for filtration equipment that does exactly what you need.

Partner with us today and discover why our industrial filtration is right for your industry!

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