PN/PXN Wireline-Set Electrical Feedthrough Blanking Plug | X / XN Nipple | Dual Pressure Barrier | 600VAC / 20–30A | Two-Trip Wireline Setting

The PN/PXN Plug series includes two core types - the PN Plug and the PXN Plug - specially designed to match different downhole nipple profiles for oil and gas well applications requiring both electrical feedthrough and pressure isolation. The PN type is suitable for X-type profile nipples, while the PXN type is designed for XN-type bottom no-go nipples, realizing precise profile matching and efficient pressure holding in the respective nipple configurations. Both types are positive blank-off tools with dual pressure holding capacity - holding pressure from both above and below - focusing on solving pressure isolation and electrical connection challenges in downhole completions with electrical equipment such as electrical submersible pumps (ESPs), downhole sensors, and intelligent well systems. Unlike conventional blanking plugs that provide only pressure isolation, the PN/PXN Plug integrates electrical feedthrough capability - featuring spring-loaded silver-nickel butt contacts that ensure optimal contact force, superior conductivity, and long-term durability for downhole electrical power and signal transmission. The contacts are rated to 600VAC and 20–30A, maintaining stable electrical connection even after repeated setting and retrieval cycles. The patented spring-assisted contact design ensures "set and forget" reliability, reducing maintenance frequency and improving operational efficiency in downhole applications where electrical continuity is critical. The plug is set via a two-trip wireline procedure: the first trip locks the plug body into the nipple with bypass ports exposed for pressure equalization, allowing the pressure above and below the plug to equalize safely before blanking; the second trip runs the prong to blank off the bypass ports, completing the pressure seal. To retrieve the plug, the prong is pulled first to re-open the bypass and equalize pressure, then the plug body is retrieved - ensuring safe, pressure-balanced operation throughout the setting and retrieval process without the risk of swabbing or trapped pressure that can cause well control issues. With professional structural design and high-quality material selection - including PBT, epoxy-coated zamak, and aluminum for the body, with IP66 and IP67 environmental protection ratings - the plug adapts to various complex downhole conditions including high humidity, vibration, and temperatures from -40°F to 365°F, providing reliable guarantee for the stable operation of downhole electrical equipment and pressure isolation systems. Compliant with UL, CSA, IEC, and RoHS international standards, the PN/PXN Plug is widely used in ESP completions, intelligent well systems, downhole monitoring and sensor installations, well intervention with electrical equipment, and pressure control applications in oil and gas wells worldwide - delivering consistent electrical performance and reliable pressure holding in harsh downhole environments.

1. Dual Pressure Holding Capacity (Positive Blank-Off)

Both PN and PXN type plugs are designed to hold pressure from both above and below, ensuring tight sealing and stable pressure control in X-type and XN-type bottom no-go nipple applications respectively, effectively preventing pressure leakage and ensuring operational safety. The positive blank-off design provides a reliable downhole pressure barrier for well intervention, zonal isolation, and well suspension operations - with the electrical feedthrough capability allowing power and signal transmission through the pressure barrier. (Specific pressure rating to be confirmed by engineering - typical range 5,000–10,000 PSI for downhole wireline-set blanking plugs.)

2. Compact & Durable Downhole Construction

Adopting a compact structure ideal for downhole installations with limited space, the casing is made of high-quality materials such as glass fiber reinforced polyester (PBT), epoxy-coated zamak, or aluminum - providing excellent resistance to impact, corrosion, and downhole temperatures. The IP66 + IP67 environmental protection rating ensures the plug is dust-tight, waterproof, and anti-vibration, capable of working stably in harsh downhole environments including high humidity, vibration, and temperature extremes. The compact design allows deployment through standard wireline pressure control equipment.

3. Downhole Electrical Feedthrough with Silver-Nickel Contacts

Equipped with spring-loaded silver-nickel butt contacts rated to 600VAC and 20–30A, ensuring optimal contact force, superior conductivity, and long-term durability for downhole electrical power and signal transmission - maintaining stable electrical connection even after repeated plugging and retrieval cycles. The patented spring-assisted contact design ensures "set and forget" reliability, reducing maintenance frequency and improving work efficiency in ESP completions, intelligent wells, and downhole monitoring applications where continuous electrical connectivity is critical.

4. Two-Trip Wireline Setting with Bypass Pressure Equalization The plug requires two wireline trips for safe setting and retrieval:

• Setting Trip 1: Lock the plug body into the nipple - the bypass ports remain exposed, allowing pressure equalization above and below the plug before blanking. This eliminates the risk of trapped differential pressure during setting.

• Setting Trip 2: Run the prong to blank off the bypass ports, completing the pressure seal.

• Retrieval: Pull the prong first to re-open the bypass for pressure equalization, then retrieve the plug body - ensuring safe, pressure-balanced recovery without swabbing or pressure surges that could destabilize the well.

This two-trip procedure provides positive control and safety throughout the operation, and is compatible with standard slickline/e-line wireline equipment.

5. Profile-Specific Design for X and XN Nipples

The PN plug is precisely engineered for X-type profile nipples, while the PXN plug is designed for XN-type bottom no-go nipples - ensuring accurate profile engagement, secure locking, and reliable pressure holding in each respective nipple type. The profile-specific design prevents premature release or mis-setting, and the bottom no-go configuration of the PXN provides positive depth registration in XN nipples. Both types share the same electrical feedthrough and pressure barrier performance - only the profile engagement differs.

6. International Standards Compliance & Environmental Rating

Compliant with UL, CSA, and IEC international certification standards for electrical safety and performance, and RoHS and RoHS phthalates compliant with no SVHC substances - fully in line with EU and US market access requirements for electrical components. The IP66 + IP67 protection rating ensures reliable performance in high-humidity, dusty, and vibrating downhole and wellsite environments. Temperature range from -40°F to 365°F (-40°C to 185°C) for high-temperature models, covering most downhole and wellsite electrical applications.

The PN/PXN Electrical Feedthrough Blanking Plug operates through a two-trip wireline setting and retrieval process:

Setting Process - Trip 1 (Plug Body Installation)

1. The plug body is connected to a standard wireline setting tool and run into the wellbore on slickline or e-line through standard wireline pressure control equipment (lubricator, grease injector).

2. The plug body is positioned at the X-type (PN) or XN-type (PXN) nipple and locked into the nipple profile. At this stage, the bypass ports in the plug body remain open/exposed, allowing wellbore fluids to flow through and pressure to equalize above and below the plug. This pressure equalization prevents trapped differential pressure and ensures safe, controlled setting.

3. The setting tool is released and retrieved to surface, leaving the plug body locked in the nipple with bypass ports open.

Setting Process - Trip 2 (Prong Installation / Blanking)

1. The prong (blanking component) is run on wireline to the plug body.

2. The prong engages and locks into the plug body, blanking off (closing) the bypass ports. This completes the pressure barrier - the plug now holds pressure from both above and below.

3. The electrical feedthrough contacts (silver-nickel) engage simultaneously, establishing the electrical connection through the plug.

4. The wireline tool is retrieved. The plug is now fully set, providing both pressure isolation and electrical feedthrough.

Isolation & Electrical Operation Phase

Once set, the plug provides a dual pressure barrier (holding pressure from both directions) while allowing electrical power and signal transmission through the silver-nickel feedthrough contacts. The spring-loaded contacts maintain consistent electrical connection under downhole pressure and temperature variations. The IP66/IP67 protection ensures reliable performance in humid, vibrating conditions.

Retrieval Process

1. A wireline retrieval tool is run to engage and pull the prong first - this re-opens the bypass ports, equalizing pressure above and below the plug. This pressure equalization step is critical for safe retrieval, preventing the plug from being lifted by trapped pressure or causing swabbing.

2. After pressure equalization, a second wireline trip retrieves the plug body from the nipple.

3. Both the prong and plug body are recovered to surface. The well returns to full bore access.

We offer comprehensive customization for the PN/PXN Plug series:

• Custom contact configurations (number of contacts, pin layout, voltage/current ratings)

• Custom casing materials (PBT, epoxy-coated zamak, aluminum, or specialty alloys for corrosive environments)

• Custom temperature ratings beyond standard -40°F to 365°F

• Custom pressure ratings for specific nipple and well conditions

• Custom electrical cable and connector options for surface and downhole connections

• Custom profile engagement for non-standard X/XN nipple variants

• OEM/ODM branding and custom packaging

• Custom color coding for PN vs PXN identification

• Bulk packaging for multi-well ESP or intelligent well campaigns

Lead time for custom orders: 15–30 working days depending on complexity; sample evaluation units available before bulk orders.

We adhere to strict quality control standards throughout the production process of the PN/PXN Plug, from raw material selection to product assembly and testing, to ensure that each product meets international standards and customer requirements:

• Raw Material Inspection: Strictly inspect the quality of casing materials (PBT, zamak, aluminum), silver-nickel contact materials, elastomer seals, and other raw materials to ensure they meet durability, electrical performance, and downhole environmental requirements. Material test reports (MTR) provided for metallic components.

• Production Process Control: Adopt precision manufacturing technology, strictly control each production link, and ensure the accuracy and stability of product structure, contact alignment, and profile engagement dimensions.

• Finished Product Testing (100% of production):

- Pressure Holding Test: Each plug undergoes pressure holding test to verify bidirectional sealing integrity

- Electrical Performance Test: Contact resistance, insulation resistance, voltage withstand, and current carrying capacity verified

- Environmental Protection Test: IP66/IP67 ingress protection verified

- Profile Engagement Test: PN and PXN plugs verified for proper engagement in X and XN nipple test fixtures

- Contact Cycle Test: Sample plugs tested for repeated setting/retrieval electrical contact reliability

• Certification Guarantee: The product has passed UL, CSA, IEC, and RoHS certifications for electrical safety and environmental compliance, complying with the quality and safety standards of global markets such as Europe and the United States. API and ISO compliance documentation available on request for downhole applications.

• Traceability: All products traceable by material batch number and serial number.

Warranty

12-month quality warranty from date of shipment. If there is any quality problem within the warranty period (excluding man-made damage), we provide free replacement or maintenance services, with 24-hour technical support for downhole installation, electrical connection, and troubleshooting.

1. Electrical Submersible Pump (ESP) Completions

The primary application for the PN/PXN electrical feedthrough blanking plug in ESP well completions, where the plug provides both a pressure barrier and electrical feedthrough for ESP power cables and downhole sensors. The X-type (PN) or XN-type (PXN) nipple profile ensures secure placement in the completion string, and the 600VAC / 20–30A silver-nickel contacts deliver reliable power transmission to the downhole pump motor. The two-trip wireline setting with bypass equalization allows safe installation and retrieval without well control issues.

2. Intelligent Wells & Downhole Monitoring

Used in intelligent well systems and downhole monitoring installations where downhole sensors, pressure/temperature gauges, and flow control devices require both electrical connectivity and pressure isolation. The plug's electrical feedthrough capability allows continuous data transmission from downhole sensors to surface, while the dual pressure barrier provides zonal isolation. The "set and forget" spring-assisted contact design ensures long-term reliability for permanent monitoring installations.

3. Well Intervention with Downhole Electrical Equipment

Provides a reliable pressure barrier and electrical connection during well intervention operations involving downhole electrical equipment - including wireline-deployed sensors, logging tools with electrical feedthrough requirements, and temporary electrical installations for well testing. The compact design and wireline setting make it suitable for intervention operations where rig-based workover is not available or cost-prohibitive.

4. Well Suspension & Pressure Control

Serves as a positive blank-off plug for well suspension (temporary shut-in) and pressure control applications, holding pressure from both above and below to isolate well sections during idle periods, maintenance, or equipment changes. The bypass equalization feature ensures safe setting and retrieval without trapped pressure, and the dual pressure holding capacity handles pressure from either direction - a critical safety feature for suspended wells where pressure may build from below.

5. Zonal Isolation with Electrical Access

Provides zonal isolation while maintaining electrical access to lower zones - enabling selective zone testing, stimulation, or production with downhole electrical monitoring in place. The profile-specific design for X and XN nipples ensures compatibility with standard completion strings, and the IP66/IP67 protection ensures reliable performance in the demanding downhole environment including high humidity, vibration, and temperature cycling.

Q: What is the difference between PN Plug and PXN Plug?

A: The main difference is the applicable nipple profile: the PN Plug is designed for X-type profile nipples, while the PXN Plug is designed for XN-type bottom no-go nipples. Both have the same dual pressure holding capacity, electrical feedthrough performance (600VAC / 20–30A silver-nickel contacts), and two-trip wireline setting procedure. The XN-type bottom no-go design of the PXN provides positive depth registration, while the X-type profile of the PN allows setting at any profile location in the nipple. Select based on the nipple type installed in your well.

Q: Is this a downhole tool or an industrial electrical connector?

A: The PN/PXN Plug is a downhole wireline-set electrical feedthrough blanking plug designed for oil and gas well applications. It combines two functions in one tool: (1) a positive pressure barrier (blanking plug) for downhole pressure isolation, and (2) an electrical feedthrough connector (600VAC / 20–30A) for downhole electrical equipment such as ESPs and sensors. It is set on wireline in X or XN profile nipples and is not a surface industrial connector. The UL/CSA/IEC/RoHS certifications apply to the electrical contact and insulation components.

Q: What is the pressure rating?

A: Both PN and PXN plugs hold pressure from both above and below (dual pressure barrier). The specific maximum pressure rating depends on the nipple configuration and well conditions - contact our engineering team with your nipple type and well pressure for a specific rating confirmation. Typical downhole wireline-set blanking plugs of this type range from 5,000 to 10,000 PSI.

Q: How does the two-trip wireline setting work?

A: The plug is set in two wireline trips for safety: Trip 1 runs and locks the plug body into the nipple with bypass ports open for pressure equalization; Trip 2 runs the prong to blank off the bypass ports, completing the seal and engaging the electrical contacts. For retrieval, the prong is pulled first to re-open the bypass and equalize pressure, then the plug body is retrieved. This procedure eliminates trapped pressure and swabbing risks. Standard slickline or e-line wireline equipment is used.

Q: Can the electrical feedthrough be customized for different voltage/current requirements?

A: Yes. The standard configuration is rated to 600VAC and 20–30A with silver-nickel spring-loaded contacts. We can customize the contact configuration, number of contacts, pin layout, and voltage/current ratings based on your specific downhole electrical equipment requirements (ESP power, sensor signals, etc.). Contact our engineering team for custom electrical specifications.

Q: What is the MOQ, delivery time, and payment method?

A: The MOQ is 1 piece for standard models. Standard products ship within 7–15 working days for small and medium orders, and 20–30 working days for large bulk or custom orders. We ship from Shanghai or Ningbo port. Payment terms include T/T (30% deposit, 70% before shipment), L/C at sight, and Western Union. Sample evaluation units available.

Q: What certifications and standards apply?

A: The electrical components are certified to UL, CSA, and IEC standards, and the product is RoHS compliant (no SVHC substances) for EU and US market access. The IP66 + IP67 environmental protection rating is verified. For downhole oilfield applications, API and ISO compliance documentation is available on request. Each unit undergoes 100% pressure holding test and electrical performance test before shipment, with material test reports (MTR) provided for metallic components.

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