Large Bore Double Grip Retrievable Packer

Our Large Bore Double Grip Retrievable Packer is a high-performance, API Spec 11D1 compliant downhole tool, engineered for demanding oil and gas well operations. Designed with a full large-bore drift diameter, dual-grip bidirectional anchoring system, and reliable retrievable mechanism, this packer delivers exceptional sealing stability, bidirectional pressure resistance, and smooth run-in/pull-out performance.

It is widely applied in vertical, deviated, and horizontal wells for completion, high-rate hydraulic fracturing, acidizing, water/gas injection, formation testing, cement squeezing, and zonal isolation operations. Compatible with standard tubing strings, it eliminates the need for specialized running tools, reduces operational risks, and cuts down well completion costs via its reusable design after proper surface maintenance.

1.Optimized Large Bore Full Drift Design : The ultra-smooth, large internal bore minimizes flow restriction and throttling loss, perfectly matching high-rate fracturing, acidizing, and large-volume injection operations. The full drift design allows seamless passage of other downhole tools through the packer, eliminating the need for extra tripping operations and improving overall wellsite efficiency.

2.Dual-Grip Bidirectional Anchoring System : Equipped with upper and lower sets of high-strength alloy slip assemblies, the packer provides reliable bidirectional anchoring to the casing wall. Unlike single-grip packers, it withstands extreme pressure differentials from both above and below the packer, eliminating movement, slippage, and casing damage risks during pressure fluctuations in stimulation operations.

3.Reliable Retrievable & Release Mechanism : The premium anti-preset locking and balanced release mechanism ensures smooth and dependable retrieval, even after long-term exposure to high-pressure, high-temperature (HPHT), and corrosive downhole environments. The design prevents premature setting during run-in, and enables full retraction of slips and sealing elements during release, minimizing stuck pipe risks and enabling complete recovery to the surface.

4.High-Performance Sealing System : Multi-element sealing stack with premium elastomer options (standard HNBR, high-temperature FKM/Viton, sour-service Aflas) delivers superior sealing performance across a wide range of temperatures and pressures. The sealing elements are compounded to resist oil, gas, H2S, CO2, and high salinity, ensuring long-term zero-leakage zonal isolation throughout the well operation cycle.

5.Corrosion-Resistant Material Options : The main body is manufactured from high-grade alloy structural steel with strict heat treatment for maximum strength and durability. For sour service wells, we provide full NACE MR0175/ISO 15156 compliant material options, including corrosion-resistant alloy (CRA) for critical components, to adapt to harsh downhole environments with high H2S/CO2 content.

6.Simplified Operation & Wide Compatibility : Supports both standard hydraulic setting (default) and optional mechanical setting, fully compatible with conventional tubing strings without specialized running tools. It fits all common casing sizes and weights, and adapts to vertical, deviated, and medium-horizontal wellbores, reducing on-site operational complexity and the risk of human error.

7.Strict API Compliance & Quality Assurance : Every unit is designed, manufactured, and tested in full accordance with API Spec 11D1 standards. All products undergo full hydrostatic strength testing, sealing performance testing, and non-destructive inspection (UT/MT) before shipment, with a unique serial number for full traceability.

- Run-in & Setting :The packer is run into the target depth via the tubing string. For hydraulic setting (standard), pressure is applied through the tubing to actuate the hydraulic piston, which simultaneously drives the upper and lower slip assemblies to expand and firmly anchor into the casing wall, while compressing the sealing elements to radially expand and fully seal the tubing-casing annulus. The built-in locking mechanism maintains the set state after pressure is bled off. For mechanical setting, the packer is set via tubing rotation and controlled set-down weight, suitable for wells where hydraulic setting is not feasible.

- Operational State :Once set, the packer provides reliable bidirectional pressure containment and zonal isolation. The dual-grip slip system stabilizes the packer against upward and downward pressure fluctuations during fracturing, acidizing, or injection operations, while the multi-element sealing stack maintains zero leakage between isolated zones.

- Release & Retrieval : After well operations are completed, pressure is equalized across the packer. A straight upward pull on the tubing string activates the release mechanism, unlocking the set state, retracting the slip assemblies, and allowing the sealing elements to fully retract via their inherent resilience. The packer is then free from the casing and can be smoothly retrieved to the surface for inspection, maintenance, and reuse.

- Pre-Run Inspection : Perform full visual inspection of all threads, sealing elements, and slip assemblies for damage before run-in. Conduct drift diameter verification and confirm compatibility with the casing size, weight, and grade of the target well.

- Run-in Operation : Lower the tubing string at a controlled speed (max 30m/min), avoiding sudden braking or rapid lowering to prevent premature setting. Reduce speed when passing through deviated sections and casing couplings to avoid impact damage to the packer.

- Setting Operation : Follow the designed pressure steps for hydraulic setting, with staged pressure holding to confirm full setting. For mechanical setting, strictly control the number of tubing rotations and set-down weight to avoid over-operation.

- Release Operation : Equalize pressure across the packer before release. Apply steady upward pull to the tubing string in accordance with the rated release load. In case of minor sticking, use gentle string reciprocation instead of violent overpull to avoid tubing failure.

- Full compliance with API Spec 11D1 standard for downhole packers

- 100% hydrostatic pressure and sealing performance testing for every unit before shipment

- Non-destructive testing (UT/MT) for all critical load-bearing components

- Full material traceability with mill test reports (MTR) provided upon request

- Third-party inspection services available for custom order requirements

- Strict production quality management system certified to ISO 9001

- Conventional and unconventional oil & gas well completion

- High-rate hydraulic fracturing and matrix acidizing stimulation

- Long-term water and gas injection wells

- Formation testing and drill stem testing (DST)

- Cement squeezing and casing leak repair workover operations

- Zonal isolation for layered production and layered injection

- HPHT deep wells and sour service (H2S/CO2) wells

- Vertical, deviated, and medium-horizontal wellbores

Q: What industry standards do your Large Bore Double Grip Retrievable Packers comply with?

A: All our packers are designed, manufactured, and tested in strict accordance with API Spec 11D1, the global industry standard for downhole packers. For sour service applications, we offer material and design options fully compliant with NACE MR0175/ISO 15156 standards for H2S/CO2 corrosive environments. We also hold ISO 9001 certification for our quality management system.

Q: What casing sizes are available for this packer?

A: We offer a full range of standard sizes to fit all common casing specifications, including 4-1/2", 5", 5-1/2", 7", 7-5/8", 8-5/8", 9-5/8", 10-3/4", and 13-3/8" casing. We also provide custom design and manufacturing services for non-standard casing sizes, special wellbore parameters, or unique operational requirements.

Q: What is the maximum working pressure and temperature rating of this packer?

A: Our standard configuration has a bidirectional rated working pressure of up to 10,000 PSI (69 MPa) and a standard temperature rating of 350°F (177°C). For extreme well conditions, we offer high-temperature models up to 450°F (232°C) and 500°F (260°C), as well as ultra-high pressure models with a rating of up to 15,000 PSI (103 MPa) for deep well applications.

Q: Can this packer be reliably retrieved after long-term downhole operation?

A: Yes. The packer is engineered with a field-proven balanced release mechanism, which ensures smooth and reliable retrieval even after long-term exposure to HPHT and corrosive downhole environments. The dual-grip design eliminates unidirectional force-induced sticking risks, and the high-resilience sealing elements ensure full retraction during release. Under normal operating conditions, the packer can be fully retrieved to the surface without damage.

Q: Is this packer suitable for hydraulic fracturing operations?

A: Absolutely. The optimized large bore full drift design minimizes flow restriction, making it ideal for high-rate hydraulic fracturing and acidizing operations. The dual-grip bidirectional anchoring system withstands extreme pressure fluctuations during stimulation treatments, preventing packer movement, slippage, and sealing failure. It is widely used in both conventional and unconventional shale oil/gas fracturing operations globally.

Q: What setting methods are available for this retrievable packer?

A: We offer two primary setting options: hydraulic setting (standard configuration) and mechanical setting. The hydraulic setting type is compatible with standard tubing strings, requires no specialized running tools, and is suitable for most vertical, deviated, and horizontal wells. The mechanical setting type is available for wells where hydraulic setting is not applicable, operated via tubing rotation and controlled set-down weight. Custom setting mechanisms can be developed based on your operational requirements.

Q: What material options are available for sour gas wells with H2S and CO2?

A: For standard applications, the packer body uses high-grade P110/L80 alloy steel with HNBR sealing elements. For sour service wells, we provide full NACE MR0175 compliant material options, including L80-13Cr, 9Cr, and corrosion-resistant alloy (CRA) for critical components. We also offer FKM (Viton) and Aflas sealing elements with excellent H2S/CO2 resistance, ensuring long-term reliability in harsh corrosive environments.

Q: Can the packer be reused after retrieval?

A: Yes, under normal operation and retrieval conditions, the packer can be reused multiple times. After retrieval, complete disassembly, inspection, maintenance, and replacement of wearing parts (such as sealing elements, backup rings, and slip inserts) are required on the surface. Each reused packer will undergo the same factory hydrostatic and sealing performance tests to ensure it meets the original rated performance requirements, which can significantly reduce your per-well operational costs.

Q: What is the lead time for orders?

A: For standard size packers in our regular inventory, we can arrange shipment within 3-5 working days. For custom-sized, sour service, or high-temperature/high-pressure custom models, the typical lead time is 15-30 working days, depending on the order quantity and customization complexity. We will provide a detailed delivery schedule immediately after confirming your order specifications.

Q: Do you provide technical support for on-site operations?

A: Yes. We have a professional technical team with over 15 years of oilfield downhole tool experience. We provide detailed operation manuals, step-by-step video guidance, and 24/7 remote technical support for on-site operations. For large-scale projects or long-term cooperation, we can also arrange on-site technical engineers to provide on-site guidance, operation training, and troubleshooting services according to your requirements.

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