Hydro-Set Retainer Production Packer

Our Hydro-Set Retainer Production Packer is a premium, field-proven hydraulic-set, mechanically retained production packer, engineered to deliver reliable long-term zonal isolation and annular sealing for oil and gas well completion, production, and stimulation operations. Manufactured in strict compliance with API Spec 11D1 international standards, this packer features an integrated ratchet retainer locking system that maintains permanent setting load, eliminating premature unset risks caused by downhole pressure fluctuations, temperature changes, or tubing movement.

Designed for versatility, it performs exceptionally well in vertical, highly deviated, and horizontal wellbores where tubing manipulation is restricted. The slim-line, robust construction enables fast, risk-free run-in, while the high-performance sealing system ensures consistent integrity throughout the entire well lifecycle, making it the industry-preferred solution for both conventional and unconventional oil & gas fields worldwide.

1.Hydraulic Setting Mechanism with Positive Ratchet Retainer : Lock No tubing rotation, reciprocation, or weight setting required; the interlocking ratchet lock ring permanently locks the packer in the set position, maintaining sealing force even when tubing pressure is released, ensuring zero accidental unset during production.
2.Dual Opposed Full-Circle High-Strength : Slips Bi-directional anchoring with case-hardened, carburized teeth that evenly distribute load to the casing, delivering superior grip for both tubing-to-annulus and annulus-to-tubing pressure differentials, preventing packer migration in extreme conditions.
3.Anti-Extrusion Sealing System with Multiple Elastomer Options : 3-element packing stack with interlocking expandable metal backup rings, creating a positive barrier to prevent elastomer extrusion under high pressure. Available in NBR, HNBR, and Viton® to match specific well temperature, corrosion, and fluid conditions, with swab-off resistance during run-in.
4.Slim-Line Solid Alloy Steel Construction : Machined from high-grade AISI 4140, P110, L80, and 13Cr alloy steel, with optional anti-corrosion coatings for H2S/CO2 sour service. Compact design minimizes running risks, with maximum internal bore to optimize production flow and accommodate well intervention tools.
5.Single-Trip Run & Set Operation : Integrated setting mechanism eliminates the need for extra wireline, coiled tubing, or setting tools. The packer is run and set on the production tubing string in a single trip, significantly reducing rig time, non-productive time (NPT), and operational costs.
6.Field-Adjustable Shear Release System : Adjustable shear pins for customizable setting initiation and retrieval overpull force, enabling safe, predictable straight-pull retrieval at the end of the well lifecycle, with no milling required for standard recovery.
Wide Compatibility with Standard Completion Accessories Compatible with all API standard tubing threads, seal nipples, polished bore receptacles (PBR), gas lift mandrels, and subsurface safety valves, supporting flexible completion design for single, dual, and stacked multi-zone installations.

- Run-In Hole : The Hydro-Set Retainer Production Packer is made up to the production tubing string and run to the target setting depth at a controlled speed. All internal components remain in the locked run-in position, preventing premature setting and ensuring smooth conveyance through doglegs and tight wellbore sections.

- Hydraulic Setting Activation : Once at the desired depth, apply incremental pressure to the tubing interior against a temporary plugging device (e.g., wireline plug, cement retainer). The pressure acts on the packer's hydraulic piston, driving the upper and lower cones into the dual slip assemblies, while simultaneously compressing the elastomer sealing elements.

- Slip Anchoring & Sealing : The slips expand outward, with hardened teeth firmly digging into the casing inner wall to anchor the packer securely. The compressed sealing elements expand radially to create a tight, permanent seal between the tubing and annulus, isolating the production zone.

- Retainer Locking Engagement : As the setting stroke completes, the ratchet retainer lock ring engages with the mating thread profile on the packer mandrel, mechanically locking the slips and sealing elements in the fully compressed set position. This positive lock maintains constant setting load, even with downhole pressure and temperature fluctuations.

- Production Operation : After releasing tubing pressure and performing a successful pressure test to verify sealing integrity, the well can be put into normal production immediately. The packer provides reliable zonal isolation, protects the casing from formation pressure, and optimizes production efficiency.

- Retrieval & Unsetting : When workover or well abandonment is required, apply a predetermined straight overpull force to the tubing string. The overpull shears the release pins, disengages the retainer locking mechanism, and retracts the slips and sealing elements, allowing the entire packer assembly to be safely retrieved from the wellbore with the tubing string.

All our Hydro-Set Retainer Production Packers are manufactured in an ISO 9001 certified facility, with strict compliance to API Spec 11D1 standards for downhole packers and bridge plugs. Every unit undergoes rigorous quality control and testing before delivery, including :

- Raw material chemical composition and mechanical property testing, with full Material Test Reports (MTR) provided

- Precision dimensional inspection of all machined components via CNC coordinate measuring machines

- Non-Destructive Testing (NDT): Magnetic Particle Inspection (MPI) and Ultrasonic Testing (UT) for all critical load-bearing parts

- Hydrostatic pressure and burst testing to 1.5 times the rated working pressure

- Full function setting and sealing performance test under simulated downhole conditions

- For sour service applications, all materials comply with NACE MR0175 / ISO 15156 standards, with relevant certification provided

- Long-term oil and gas production well completion

- Zonal isolation in vertical, highly deviated, and horizontal wellbores

- Well stimulation operations (acidizing, hydraulic fracturing)

- Water and gas shut-off remedial operations

- High-Pressure High-Temperature (HPHT) well applications

- Sour service wells with H2S and CO2 content

- Conventional and unconventional (shale gas, tight oil) well completions

- Offshore and onshore well completions

- Single-zone and multi-zone stacked packer installations

Q: What is the core difference between a Hydro-Set Retainer Production Packer and a standard mechanical set production packer?

A: The key differences lie in the setting method and locking performance. Our Hydro-Set Retainer Packer is activated solely by tubing hydraulic pressure, requiring no tubing rotation, reciprocation, or weight setting-making it ideal for deviated and horizontal wellbores where mechanical setting is unreliable or impossible. The integrated ratchet retainer system provides positive mechanical locking after setting, maintaining constant sealing load even during downhole pressure/temperature fluctuations. In contrast, standard mechanical packers rely on tubing manipulation to set, and may lose sealing integrity with tubing movement or pressure changes.

Q: What casing sizes are available for this packer, and do you offer custom sizes?

A: We offer standard sizes for all common API casing dimensions, ranging from 2-3/8" up to 13-3/8" OD. We also provide full custom engineering and manufacturing for non-standard casing sizes, special pressure/temperature ratings, and unique well completion requirements. Our in-house engineering team will tailor the packer design to match your exact well specifications.

Q: How do I choose the right sealing element material for my well?

A: We offer three industry-standard elastomer options, with custom materials available for extreme conditions:

Nitrile Rubber (NBR): Best for conventional wells with temperatures up to 250°F (121°C), excellent oil resistance and cost-effectiveness for standard production applications

Hydrogenated Nitrile (HNBR): For temperatures up to 300°F (149°C), superior resistance to H2S, CO2, aromatic hydrocarbons, and mild sour service conditions

Fluorocarbon Rubber (Viton®): For HPHT wells up to 450°F (232°C), exceptional chemical resistance to acid, corrosion, and extreme temperatures, ideal for stimulation and hostile well environmentsOur technical team will recommend the optimal material based on your well's maximum temperature, formation fluid properties, and H2S/CO2 content.

Q: Can this packer be used in sour gas wells with H2S and CO2?

A: Yes. For sour service applications, we offer NACE MR0175 / ISO 15156 compliant alloy steel materials (including L80, 13Cr, and duplex stainless steel) and corrosion-resistant elastomers (HNBR, Viton®) to withstand H2S and CO2 environments. We also provide HVOF anti-corrosion coating for critical components to extend service life in highly corrosive wells.

Q: Do I need special setting tools to install this Hydro-Set Retainer Production Packer?

A: No. The packer features an integrated hydraulic setting mechanism, which is fully actuated by applying pressure directly through the production tubing. No extra wireline setting tools, coiled tubing, or additional setting mandrels are required. This simplifies the installation process, reduces equipment needs, and cuts down on rig time and operational costs.

Q: Is this packer retrievable, or is it a permanent mill-type packer?

A: This is a fully retrievable production packer. It is designed for straight-pull retrieval via the tubing string, with no milling required for standard recovery. When retrieval is needed, simply apply the predetermined overpull force to shear the release pins, disengage the retainer lock, and retract the slips and sealing elements. The entire assembly can then be pulled out of the wellbore with the tubing string. We also offer permanent mill-type versions upon request for long-term abandonment applications.

Q: What is the bidirectional pressure rating of the packer?

A: Our standard Hydro-Set Retainer Production Packer delivers a 5,000 PSI bidirectional pressure rating, providing reliable sealing for both tubing-to-annulus and annulus-to-tubing pressure differentials. We also offer upgraded high-pressure models with ratings up to 10,000 PSI and 15,000 PSI for HPHT well applications, fully tested to API 11D1 standards.

Q: What thread connections are available for the packer?

A: We provide all standard API tubing threads, including NU (Non-Upset) and EU (External Upset), as well as a full range of premium threads such as VAM, Hydril, BTC, and more. We can also customize the thread connections to match your existing tubing string specifications, ensuring full compatibility with your completion equipment.

Q: Can this packer be used in stacked multi-zone completion installations?

A: Yes. The packer features no downward mandrel movement during setting, making it ideal for stacked multi-zone completion applications. Multiple units can be run on the same tubing string and set sequentially to isolate multiple production zones, with no risk of unintentionally setting lower packers during the upper packer setting sequence.

Q: What documentation and certification do you provide with each order?

A: With every shipment, we provide a full documentation package, including:

- API 11D1 compliance certificate

- Material Test Reports (MTR) for all critical components

- Non-Destructive Testing (NDT) reports

- Hydrostatic pressure and function test certificates

- Operation and maintenance manual

- For sour service orders, we provide NACE MR0175 material compliance certification

Q: What is the minimum order quantity (MOQ), and what is your typical lead time?

A: We offer a flexible MOQ, with support for single-unit trial orders and bulk production for large-scale projects. For standard size models in stock, we can arrange shipment within 3 working days. For custom-engineered models, typical lead time is 15–30 working days, depending on the complexity of the customization and order quantity. We also offer expedited production for urgent project requirements.

Q: Do you provide technical support for on-site installation and operation?

A: Yes. We have a dedicated technical support team with over 15 years of downhole completion tool experience, providing 24/7 pre-sales and after-sales support. We offer remote operational guidance, video training, and on-site technical support (subject to project location) to ensure correct installation, setting, and retrieval of the packer, minimizing operational risks for your team.

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