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Bailer Float Sub - 3.125"

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Want To Know More About This Tool?

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Bull Dog® Tool’s Bailer Subs are designed to work in conjunction with Bull Dog Tool’s Bailer and Multiplier by allowing for the removal of difficult inorganic and organic debris. The large flow-through area will allow for easy transport and removal of sand and/or other debris.  

Applications

Bull Dog® Tool’s for aiding in the removal and transport of debris from a well.

Features & Advantages

  • Full 1.25 -inch I.D. to assist in capturing debris

  • Specially designed “flapper” to allow debris to pass into the debris chamber and close for easy removal.  

  • Contact your Bull Dog Tool Representatives for addition sizes.

  • Available in three different models for your application.

Specifications

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Assembly No. Part

3181 F Float Sub

3181 B Bit Float Sub

3181 MT Mill Tooth Float Sub

1 - Lower Half

3193 F

3193 B

3193 MT

2 - Upper Half

3194 F

3194 B

3194 MT

3 - Flapper Valve

3195 F

3195 B

3195 MT

4 - O-Ring*

3196 F

3196 B

3196 MT

5 - Pivot Pin w/ Torsion Spring*

3197 F

3197 B

3197 MT

6 - Bumper Rubber*

3198 F

3198 B

3198 MT

*Redress Part

Frequently Asked Questions (FAQs)

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  1. What is the 3.125" Bailer Float Sub used for?

    The 3.125" Bailer Float Sub is a key component of the Bull Dog® Bailer system, used to control fluid and debris flow during non-circulating cleanout jobs. It allows debris to pass into the tubing chamber through a flapper valve, then seals off to retain material during retrieval.


  2. What is the internal diameter and why does it matter?

    The 3.125" model typically features a 1.25" internal diameter, which provides efficient flow-through capacity while maintaining structural integrity. A properly sized I.D. ensures that sand, ball sealers, or other debris can be collected efficiently without clogging or restricting pump stroke action.


  3. How does the flapper valve work in the 3.125" float sub?

    The integrated flapper valve opens during downhole pumping to allow debris into the chamber, then automatically closes on the upstroke. This prevents debris backflow and keeps material trapped above the float for surface retrieval — a critical function in low-pressure, fluid-sensitive wells.


  4. When should I run the 3.125" Float Sub instead of a larger model?

    Run the 3.125" model in 4.5" casing or similar wellbores where larger O.D. tools won’t fit or could increase sticking risk. It’s ideal for precision cleanout jobs, especially in tight-hole or deviation-sensitive conditions.


  5. Can I get a custom configuration of the 3.125" float sub?

    Yes — Bull Dog Tool offers custom float subs based on your casing specs, debris type, and bailer configuration. We can adjust I.D., length, and flapper characteristics to optimize for unique downhole conditions or retrieval needs.

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