Retrievable Packer

Engineered to meet the strictest global oilfield standards, our packers create a tight, zero-leak seal between the tubing string and casing inner wall, effectively isolating target formations, preventing cross-flow between zones, and providing a stable barrier for a full range of downhole operations. Unlike permanent packers, our retrievable design enables full, non-damaging retrieval from the wellbore after the operation, eliminating costly milling work, reducing operation time, and supporting repeated use after standard maintenance, delivering exceptional total cost of ownership (TCO) for our global customers.

1.Superior Retrievable & Reusable Design ：Our packers feature a non-damaging release mechanism, allowing full retrieval to the surface via standard tubing manipulation (overpull or rotation) with no residual components left downhole. After proper inspection, maintenance, and seal replacement, the packer can be reused for multiple well operations, drastically cutting single-well tool costs and reducing downhole waste.

2.High-Performance HTHP Sealing Capability ：Equipped with premium elastomer sealing elements paired with anti-extrusion metal backup rings, our packers maintain a reliable, zero-leak seal even under extreme downhole conditions. Standard models support up to 350°F (177°C) and 10,000 PSI (69 MPa), with high-grade options available for up to 500°F (260°C) and 15,000 PSI (103 MPa) HTHP environments.

3.Flexible & Controllable Actuation ：We offer two mainstream actuation types to fit diverse operation needs: hydraulic-set and mechanical-set. Both designs feature simple, predictable setting procedures, a positive locking ratchet system to maintain sealing force under fluctuating pressure/temperature, and a low-force release mechanism to minimize stuck risk and shorten workover time.

4.Full Wellbore & Condition Adaptability ：Optimized for vertical wells, deviated wells, horizontal wells, and extended-reach wells, our packers are compatible with API standard casing sizes from 2-3/8" to 13-3/8". We also provide corrosion-resistant material upgrades (13Cr, 22Cr duplex stainless steel, Inconel) and specialized sealing formulations for high H2S/CO2 acidic wells, slim holes, and narrow-clearance wellbores.

5.Compact High-Strength Structure ：Manufactured from premium alloy steel, our packers feature a streamlined, compact design that reduces overall tool string length, improves downhole passability, and lowers the risk of downhole sticking or blockage. The robust body structure withstands high tensile, compressive, and torsional loads during running, setting, and retrieval operations.

6.Wide Process Compatibility ：Fully compatible with conventional tubing and coiled tubing operations, our retrievable packers can be paired with downhole tools including fracturing sleeves, sand blasters, safety valves, and formation testing tools, supporting almost all mainstream downhole completion, stimulation, workover, and testing processes.

Our retrievable packers are available in two primary actuation configurations, both built around a core design of reliable setting, positive locking, and damage-free retrieval :

1. Hydraulic-Set Retrievable Packers

Setting: Run the packer to the target depth via the tubing string. Apply controlled hydraulic pressure through the tubing to actuate the setting piston, which radially compresses the elastomer sealing element outward to form a tight seal against the casing. Simultaneously, the slip assembly is expanded to anchor the packer firmly to the casing, with the integrated ratchet locking mechanism engaging automatically to maintain permanent setting force after pressure is released.

Locking: The self-energizing ratchet lock prevents retraction of the sealing element and slips, ensuring long-term stable sealing and anchoring even under cyclic downhole pressure and temperature changes.

Releasing: Apply a predetermined straight tensile overpull to the tubing string. The overpull shears the release shear pins, disengages the locking mechanism, and fully retracts the slips and sealing element, enabling smooth, full retrieval of the entire packer assembly to the surface.

2. Mechanical-Set Retrievable Packers

Setting: Run the packer to the target depth, then apply a specified number of right-hand tubing rotations combined with controlled weight set-down. This action drives the cone assembly into the slips, expanding the slips to anchor to the casing, while compressing the sealing element to form a reliable seal. The locking mechanism engages automatically to hold the set position.

Releasing: Apply left-hand tubing rotation to disengage the locking thread, followed by a slight overpull to fully retract the slips and decompress the sealing element, allowing the packer to be retrieved smoothly without damage.

- All our retrievable packers are designed and manufactured in strict accordance with API Spec 11D1 (Packers and Bridge Plugs) and ISO 14310 global oilfield standards.

- Every unit undergoes rigorous in-plant testing before shipment, including hydrostatic pressure testing, tensile strength verification, seal performance testing, and full-cycle setting/releasing function testing.

- We provide full Material Test Reports (MTR) for all critical components, with complete material traceability from raw material to finished product.

- Our manufacturing facility is certified with API Q1, ISO 9001 Quality Management System, and we support third-party inspection services (BV, DNV, SGS) upon customer request.

- Zonal stimulation : Layered fracturing, acidizing, and matrix stimulation, enabling precise treatment of target formations without cross-flow
- Production & injection control : Multi-zone separate production, layered water/gas injection, and selective production optimization to maximize reservoir recovery
- Well testing & evaluation : Drill stem testing (DST), formation evaluation, and production logging, providing temporary isolation for accurate reservoir data acquisition
- Well intervention & workover : Temporary zonal isolation during workover, squeeze cementing, casing repair, and fishing operations, eliminating well killing and reducing formation damage
- Temporary well abandonment : Short-to-medium term temporary well plugging, with full retrievability to resume operations quickly without costly milling
- Horizontal & extended-reach well operations : Optimized designs for complex wellbores, ensuring reliable setting, sealing, and retrieval in high-angle and horizontal well environments

Q: What is the core difference between a retrievable packer and a permanent packer?

A: The key distinction is retrievability and intended use case. A retrievable packer is engineered to be fully retrieved from the wellbore using standard tubing manipulation (overpull or rotation) after the operation, with no need for milling or drilling. It is ideal for temporary/medium-term isolation, stimulation, workover, and testing operations, and supports repeated use after maintenance to reduce costs. A permanent packer is designed for long-term, fixed installation in the wellbore, and requires milling/drilling to be removed, making it only suitable for long-term production completion.

Q: What well types and conditions are your retrievable packers compatible with?

A: Our standard retrievable packers are suitable for vertical wells, deviated wells, horizontal wells, and extended-reach wells, with compatibility for API standard casing sizes from 2-3/8" to 13-3/8". We also offer fully customized solutions for extreme well conditions, including high-temperature high-pressure (HTHP) wells, high H2S/CO2 corrosive sour wells, slim holes, and narrow-annular clearance wellbores.

Q: How do I choose between a hydraulic-set and mechanical-set retrievable packer?

A: The selection depends on your wellbore conditions and operation requirements:

Hydraulic-set packers are the preferred choice for horizontal wells, extended-reach wells, and high-angle deviated wells, where accurate tubing rotation or weight set-down is difficult to achieve. They offer simple, pressure-controlled setting with no tubing manipulation required, and are fully compatible with coiled tubing operations.

Mechanical-set packers are ideal for conventional vertical wells and operations where hydraulic pressure control is limited. They do not require tubing pressure tightness during setting, with straightforward, reliable operation and minimal surface equipment requirements.Our technical team can provide customized selection recommendations based on your specific well parameters and operation objectives.

Q: What should I do if the retrievable packer fails to release or retrieve?

A: Our retrievable packers are designed with a redundant release mechanism to minimize retrieval failure risk. In the rare event of a release issue, we provide standardized solutions:

- First, follow the standard release procedure with adjusted overpull force or rotation torque within the safe operating limit of your tubing string.

- For packers stuck due to sand or debris deposition, circulate clean completion fluid to flush the wellbore before attempting release again.

- We provide dedicated fishing tools and retrieval accessories matched to our packer models, along with on-site technical support to guide the retrieval operation.

- Our packers feature a built-in emergency shear release safety feature, allowing for controlled release via shear of safety pins, avoiding costly milling operations in most cases.

Q: Do you offer customized retrievable packers for specific operation requirements?

A: Yes, we provide full end-to-end customization services for retrievable packers to meet your unique operation needs. Our engineering team can customize non-standard casing sizes, premium connection threads, corrosion-resistant material upgrades, specialized sealing element formulations, dual-set actuation mechanisms, compact slim-hole designs, and compatibility with your existing downhole tool string. We also provide 3D modeling and performance simulation for all customized designs to ensure full compliance with your operation requirements.

Q: Are your retrievable packers reusable, and what maintenance is required after retrieval?

A: Yes, our retrievable packers are designed for multiple reuses when properly maintained. After successful retrieval, the packer must undergo full disassembly, cleaning, and comprehensive inspection:

- Inspect the main body, slips, cone, and locking components for wear, corrosion, or mechanical damage; replace any components that do not meet specification requirements.

- Replace the sealing element and all O-rings/backup rings with new genuine parts for every reuse, to ensure reliable sealing performance in subsequent operations.

- Perform full function testing and hydrostatic pressure testing on the reassembled packer before putting it back into service.We provide detailed maintenance manuals and full after-sales technical support to guide your team through the inspection and maintenance process.

Q: What is the typical lead time for orders, and do you keep stock for standard models?

A: We maintain a large inventory of standard retrievable packer models for common casing sizes (2-7/8", 3-1/2", 4-1/2", 5-1/2", 7") with standard pressure and temperature ratings, which can be shipped within 3-5 working days after order confirmation. For customized models or non-standard specifications, the typical lead time is 15-30 working days, depending on customization complexity and order quantity. We also offer expedited production for urgent operation requirements, with accelerated lead times available upon request.

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