A liner terminates inside a previously installed casing string instead of extending back to the surface. A liner hanger system supports that liner from inside the parent casing. The installation is not limited to the hanger body: it normally involves a running tool, setting mechanism, slips and cones, cementing packoff, landing components, plugs, float equipment and, when required, a liner-top packer.
The operational objective is to reach the planned setting depth without premature activation, establish sufficient circulation, set the hanger with a confirmed load path, release the running tool, place cement around the liner and verify the final liner-top condition. Each stage affects the next. Poor running clearance can cause premature setting; an incorrect pressure program can interfere with hydraulic activation; incomplete hanger engagement can compromise load transfer; and incompatible plugs or float equipment can disrupt cement displacement.
Liner Running, Setting and Cementing Process at a Glance
- Confirm the well, casing and liner program. Verify the parent casing ID and drift, liner dimensions, setting depth, trajectory, circulating-pressure envelope and required hanging capacity.
- Select the hanger and running system. Determine whether mechanical or hydraulic activation is appropriate and whether rotation, reaming, a liner-top packer, PBR or tieback provision is required.
- Assemble and function-test the equipment. Confirm connections, critical dimensions, setting components, running-tool release and cementing accessories.
- Run the liner to the planned depth. Control running speed, fill-up, circulation, surge and swab effects, torque, drag and unintended string manipulation.
- Circulate and condition the well. Establish the required flow path, confirm returns and reduce the risk of debris interfering with moving components or cement placement.
- Set the liner hanger. Apply the approved mechanical movement or hydraulic pressure sequence.
- Verify load transfer and tool status. Evaluate pressure, pumped volume, string weight, movement, rotation and release indications as applicable.
- Release the running tool. Use the primary release method and keep the contingency release available according to the approved procedure.
- Pump and displace cement. Confirm compatibility among the cementing packoff, dart, liner wiper plug, landing collar and float equipment.
- Set and test the liner-top packer when included. Verify the liner-top isolation according to the selected system and test program.
Equipment Used in a Liner Running and Cementing System
The exact assembly varies by supplier and completion design. The following equipment represents the principal functions normally considered during engineering review.
| Equipment | Primary Function | Critical Compatibility Check |
|---|---|---|
| Liner hanger | Suspends the liner and transfers axial load into the parent casing. | Parent casing ID, liner connection, hanging load, torque and setting method. |
| Slips and cones | Expand against the casing wall and establish the mechanical load path. | Casing grade, ID range, slip profile, contact area and protected running position. |
| Running tool | Runs, sets and releases from the hanger system. | Release method, torque rating, tensile capacity, circulation path and contingency release. |
| Setting ball and seat | Creates the pressure condition required to activate a hydraulic system. | Ball size, seat profile, shear value, pressure rating and post-setting circulation path. |
| Cementing packoff or bushing | Controls the flow path during liner circulation and cementing. | Seal interface, pressure rating, bypass condition and running-tool configuration. |
| Landing collar | Receives setting devices or cementing plugs and provides a landing indication. | Plug profile, ball seat, bore, pressure rating and drill-out requirement. |
| Liner wiper plug | Separates cement from displacement fluid and wipes the liner ID. | Liner ID, dart interface, landing profile, elastomer and differential pressure. |
| Float collar and float shoe | Guide the liner, provide back-pressure control and support cement placement. | Liner size, connection, valve configuration, flow area and drillability. |
| Centralizers | Improve liner standoff and support annular cement distribution. | Hole size, liner OD, restriction ID, placement and running-force requirement. |
| Liner-top packer | Provides an additional annular sealing barrier above the hanger. | Setting method, seal material, PBR interface, pressure and temperature rating. |
| Polished bore or tieback receptacle | Provides a sealing profile and optional future tieback access. | Seal-bore ID, length, debris protection and future completion program. |
For a detailed explanation of suspension, sealing and system components, review what a liner hanger is and how the complete system works.
Pre-Job Engineering Data Required Before Running
A reliable procedure starts with verified input data. Selecting a hanger only by nominal casing and liner size is insufficient. The engineering review should cover geometry, loads, hydraulics, trajectory, materials, connections and operational interfaces.
| Data Group | Information to Confirm | Why It Matters |
|---|---|---|
| Parent casing | Nominal size, weight, grade, actual or specified ID, drift and connection. | Determines hanger OD, slip operating range, running clearance and casing-contact design. |
| Liner string | OD, weight, grade, length, connection and calculated buoyed weight. | Determines axial load, connection capacity, required hanger rating and handling plan. |
| Well trajectory | Setting depth, inclination, azimuth, dogleg severity and horizontal displacement. | Influences torque and drag, available rotation, set-down transfer and running risk. |
| Hole condition | Open-hole diameter, restrictions, losses, instability, solids and expected tight spots. | Affects clearance, surge, circulation, protected-slip requirement and reaming capability. |
| Hydraulics | Flow rate, fluid density, maximum circulating pressure, surge pressure and ECD constraints. | Defines the safe hydraulic-setting window and premature-activation risk. |
| Setting program | Mechanical movement or hydraulic pressure, ball and seat, shear values and setting volume. | Controls activation and surface confirmation of the setting sequence. |
| Cementing program | Spacer, slurry, volumes, displacement fluid, plug sequence and planned bump pressure. | Ensures compatibility among the liner ID, plugs, landing collar and float equipment. |
| Environment | Bottom-hole temperature, pressure, H₂S, CO₂ and fluid chemistry. | Controls material, elastomer and sour-service selection. |
| Completion requirement | Top packer, PBR, tieback, rotation while cementing and future intervention. | Determines the complete system configuration and running-tool package. |
| Quality scope | Applicable specification, test level, MTR, NDE, third-party inspection and traceability. | Defines manufacturing, qualification and documentation obligations. |
Minimum Data for a Preliminary Selection
Liner System Assembly and Surface Function Checks
Assembly errors are difficult and costly to correct after the liner enters the well. A controlled surface process should confirm that the equipment received matches the approved bill of materials, assembly drawing and operating procedure.
- Verify identification and traceability. Match part numbers, heat numbers, serial numbers, sizes, connections and material certificates to the approved documentation.
- Inspect critical dimensions. Measure the hanger OD, minimum bore, seal bores, setting-ball size, landing profiles and running-tool interfaces.
- Inspect slips and cones. Confirm that the slips are fully retracted, protected during running and free to move through the complete designed stroke.
- Confirm hydraulic components. Check piston seals, ports, ball seats, shear devices and circulation paths against the approved pressure sequence.
- Confirm mechanical components. Check J-cage, rotational locks, setting sleeves, drag devices and any anti-preset mechanism.
- Function-test the running tool. Verify make-up, torque transfer, pickup, slack-off, primary release and contingency release as specified.
- Check plug and landing compatibility. Confirm the dart, liner wiper plug, landing collar and float equipment are from the approved compatible system.
- Record controlled values. Document shear values, torque, dimensions, test results and approved operating limits before dispatch to the rig floor.
How to Run the Liner into the Well
The running phase must deliver the liner to setting depth without damaging the wellbore, overloading the connections or allowing the slips or setting mechanism to activate prematurely.
1. Control Fill-Up, Surge and Swab Effects
Running speed should remain within the approved hydraulic model and formation-pressure limits. Restricted annular clearance, high mud viscosity, tight tolerances and long liner strings can increase surge pressure. Swab effects during pickup may also affect unstable formations or cause an unintended pressure change across downhole components.
2. Monitor Torque, Drag and String-Weight Response
Compare actual pickup weight, slack-off weight and torque with the planned envelope. A sudden change may indicate a restriction, cuttings bed, casing deformation, centralizer interference or contact between protected hanger components and the parent casing. The operation should not continue through an unexplained trend without engineering review.
3. Maintain the Approved Circulation Path
Circulation supports hole cleaning, fluid conditioning and pressure management. The hanger, running tool, setting ball seat and cementing packoff must provide sufficient bypass and internal flow area for the planned rate. The maximum circulating pressure must remain separated from the hydraulic activation threshold by the approved operational margin.
4. Prevent Premature Setting
Premature setting can be caused by unplanned rotation or axial movement in a mechanical system, excessive pressure in a hydraulic system, damage to the anti-preset mechanism, or early casing contact by exposed slips. Protected liner hanger gripping slips and a verified running clearance can reduce mechanical-contact risk in tight, deviated or tortuous well sections.
5. Review Reaming or Drill-Down Requirements
Reaming or drilling the liner to depth introduces significant torque, compression, vibration and circulation requirements. The hanger body, running tool, connections, cementing packoff and associated components must be specifically rated for the planned operation. A standard liner-running assembly should not be assumed suitable for drill-down service.
Mechanical Liner Hanger Setting Procedure
A mechanical hanger uses controlled rotation, reciprocation, axial movement, set-down load or a J-cage sequence to move the slips onto the cones. It is generally considered where the required manipulation can be transmitted reliably to the setting depth.
- Reach the planned setting depth. Confirm that the liner is at depth and that the measured string condition agrees with the running program.
- Circulate and condition the well. Clean the flow path and stabilize the pressure condition before manipulating the setting string.
- Establish the reference string condition. Pick up, slack off or rotate as required to confirm that the string can respond within the expected torque-and-drag envelope.
- Release the mechanical restraint. Move the J-cage, lock or setting sleeve according to the manufacturer-specific sequence.
- Apply the specified setting movement. Use the approved rotation direction, axial movement or set-down load to move the slips over the cones.
- Transfer the planned liner load. Slack off or otherwise transfer the required load into the hanger in accordance with the operating procedure.
- Evaluate setting indications. Review string weight, movement, rotation and any mechanical indication defined for the system.
- Perform the approved setting check. Use the specified pickup, slack-off or load-transfer check without exceeding equipment or casing limits.
- Release the running tool. Apply the approved release sequence only after the hanger status is confirmed.
Do not generalize the setting direction. Different mechanical hangers may use different rotation directions, J-cage paths, axial movements and release sequences. The correct procedure must come from the approved manual for the exact tool model.
See the J-cage mechanical liner hanger for conventional applications where controlled string manipulation is available.
Hydraulic Liner Hanger Setting Procedure
A hydraulic hanger is activated by pressure applied through the running string or liner. It can reduce dependence on pipe rotation in deep, deviated and horizontal wells, but the setting event must be integrated carefully with circulating pressure, ball-seat operation and other pressure-activated tools.
- Reach setting depth and circulate. Confirm liner depth, condition the well and record the stabilized circulating pressure at the planned rate.
- Prepare the setting path. Confirm the valves, cementing manifold, running tool and internal flow path are in the approved configuration.
- Drop or pump the setting ball. Use the specified ball for the approved seat in the landing collar or running string.
- Confirm ball landing. Evaluate the expected pressure response and pumped volume without exceeding the pre-landing limit.
- Increase pressure according to the schedule. Apply pressure in controlled increments and monitor for the defined shear or activation event.
- Stroke the setting mechanism. Differential pressure acts on the hydraulic piston or cylinders, moving the activation sleeve and slips toward the set position.
- Confirm pressure and volume response. Compare actual pressure, volume and event timing with the approved setting chart.
- Transfer liner load. Apply the specified slack-off or load-transfer procedure to engage the slips with the parent casing.
- Verify hanger engagement. Use the approved combination of pressure, volume, weight and movement indications.
- Release the running tool. Use the primary release method and retain the contingency sequence for abnormal conditions.
For deep, deviated and horizontal wells, review the pressure-set hydraulic liner hanger. Long or heavy liner programs may require a double-cone double-cylinder hydraulic liner hanger with project-specific setting-force and hanging-load verification.
How Is Hydraulic Liner Hanger Setting Pressure Planned?
There is no universal setting pressure that applies to all hydraulic liner hangers. The planned setting window must be calculated and documented for the actual system. It should remain above the maximum expected circulating, surge and operational pressure before setting, while remaining below the pressure limits of the liner, workstring, setting seat, landing collar, running tool, float equipment and other pressure-sensitive components.
| Input | Engineering Question | Risk if Incorrect |
|---|---|---|
| Maximum circulating pressure | What pressure is expected at the planned flow rate and fluid condition? | Insufficient separation can cause premature activation. |
| Surge and transient pressure | What temporary pressure peaks may occur while running or changing the flow path? | A short pressure spike may trigger a hydraulic event. |
| Ball and seat | What ball lands on which seat, and what is the seat pressure rating? | Incorrect matching can prevent pressure buildup or block the flow path. |
| Shear or activation setting | At what differential pressure is the mechanism designed to move? | Incorrect shear values can cause early or failed setting. |
| Hydraulic piston area | What force is generated by the applied differential pressure? | Insufficient force may cause incomplete slip movement. |
| Required stroke and volume | How much fluid volume corresponds to a complete setting stroke? | Pressure alone may be mistaken for full setting. |
| Other pressure tools | Which plugs, sleeves, packers or valves have separate activation pressures? | Overlapping pressure events can produce the wrong downhole sequence. |
| Equipment pressure limits | What is the lowest allowable pressure limit in the complete system? | Excess pressure can damage tubulars or downhole components. |
How to Confirm That the Liner Hanger Is Fully Set
Setting verification must follow the system-specific procedure. No single surface response should be used as the only proof of complete anchoring.
| Observed Signal | What It May Indicate | Required Caution |
|---|---|---|
| Expected activation pressure | The hydraulic event may have started. | Pressure may also rise from a restriction or incorrect flow path. |
| Expected pumped volume | The setting piston may have completed the designed stroke. | Compressibility and leakage must be considered. |
| Planned change in string weight | Part of the liner load may have transferred to the slips. | Torque and drag can mask the actual downhole load. |
| Controlled pickup or slack-off response | The hanger and running tool status can be evaluated. | Do not exceed the approved verification load. |
| Rotation or axial movement response | A mechanical setting or release sequence may have progressed. | Residual torque may produce a misleading indication. |
| Running-tool release indication | The tool may have separated from the hanger. | Release does not independently prove correct hanger engagement. |
| Stable liner-top test | The relevant sealing system may be holding pressure. | A hanger without a packer does not itself provide annular sealing. |
Liner Hanger Running-Tool Release Procedure
The running tool connects the deployment string to the liner system and transmits axial load, torque and setting action. Release may be mechanical, hydraulic, collet-based or a combination with primary and contingency methods.
Release Planning
- Confirm whether the primary release is rotational, hydraulic, axial or combined.
- Confirm the required direction, turns, pressure, movement or load from the approved manual.
- Account for residual torque, well deviation, drag and the actual neutral point of the string.
- Verify that cement, debris or solids cannot enter and lock the release profile.
- Confirm that release action will not damage the PBR, seal bore or liner-top packer.
- Prepare the contingency release sequence before running the assembly.
Typical Release Logic
- Confirm hanger setting and the required load transfer.
- Place the string in the specified tension, compression or neutral condition.
- Remove or account for residual torque.
- Apply the approved primary release action.
- Observe the expected surface response.
- Confirm separation using the approved pickup, movement, rotation or circulation indication.
- Use the contingency release only after the primary method has been reviewed and the well condition is understood.
Do not assume that all tools release with right-hand rotation, left-hand rotation or a fixed axial load. Release design varies significantly among systems.
Liner Cementing Procedure After Hanger Setting
The cementing sequence must be matched to the hanger system, running tool, packoff, plug package and float equipment. Some systems are designed to set the hanger before cementing; other engineered configurations may use a different sequence. The approved equipment manual and cementing program take precedence.
- Confirm the hanger and running-tool condition. Verify that the hanger is set and the running tool is in the required released or cementing position.
- Establish the cementing flow path. Confirm the manifold, packoff, ports and internal bypass configuration.
- Circulate and condition the well. Achieve the specified returns, fluid properties and hole-cleaning condition.
- Pump the preflush or spacer. Follow the approved fluid-compatibility and volume program.
- Pump the cement slurry. Monitor rate, pressure, density, returns and losses.
- Release the dart or pump-down plug. Confirm that it is compatible with the liner wiper plug and landing system.
- Displace the liner wiper plug. Pump the calculated displacement volume while monitoring pressure behavior.
- Confirm plug landing or bump. Compare the pressure response with the approved limit and avoid excessive overpressure.
- Verify float-equipment performance. Check whether the back-pressure valves hold after displacement according to the procedure.
- Set the liner-top packer when included. Activate the packer only after the required cementing and tool-position conditions are confirmed.
- Pressure-test the applicable liner-top system. Use the specified test direction, pressure and hold time.
- Retrieve the running string. Protect the PBR and liner-top equipment while pulling out of the hole.
Plug and Float-Equipment Compatibility
Many liner-cementing failures begin with an interface problem rather than the cement slurry itself. The drillpipe dart, liner wiper plug, landing collar, float collar and float shoe must be checked as a complete system. Confirm the liner ID, landing profiles, differential-pressure limits, valve configuration, displacement volume and drill-out requirement.
Shangshanpetro supplies a broad range of float collar and float shoe configurations for project-specific casing and liner cementing programs.
Liner-Top Packer Setting and Verification
The hanger provides mechanical suspension. A liner-top packer provides an additional annular sealing barrier when required. It may be separate from the hanger or integrated into the system. The packer should not be treated as automatically set merely because the hanger is anchored.
Before Setting the Packer
- Confirm that the cementing sequence has reached the required stage.
- Confirm the running tool and packer-setting mechanism are in the correct position.
- Remove or circulate excess cement above the liner top when the system requires it.
- Verify the PBR or seal bore is protected from debris and mechanical damage.
- Confirm the required set-down, pressure, rotation or actuator movement.
- Confirm temperature, pressure and fluid exposure are within the seal-material limits.
After Setting the Packer
- Apply the specified verification load or movement.
- Conduct the approved pressure test in the required direction.
- Record test pressure, stabilization period, hold time and allowable pressure change.
- Review whether the test confirms the packer, running-tool seal, PBR interface or another flow path.
For combined liner suspension and liner-top isolation, see the top packer liner hanger.
Common Liner Running, Setting and Cementing Problems
| Problem | Possible Causes | Engineering Checks |
|---|---|---|
| Liner cannot reach planned depth | Cuttings bed, tight hole, high dogleg, insufficient clearance, centralizer interference or excessive drag. | Compare torque-and-drag data, drift, actual OD, running speed, circulation and hole-cleaning condition. |
| Hanger sets prematurely | Pressure surge, excessive circulating pressure, unintended string manipulation, damaged anti-preset device or early slip contact. | Review pressure history, protected-slip position, running clearance, mechanical movement and assembly records. |
| Hydraulic hanger fails to set | Ball does not land, open flow path, leakage, incorrect shear setting, incomplete piston stroke or debris. | Review ball/seat compatibility, pressure-volume response, setting calculations and tool function test. |
| Mechanical hanger fails to set | Incorrect J-cage position, insufficient rotation or set-down transfer, drag, debris or wrong operating sequence. | Review actual string movement, torque, axial load and manufacturer-specific setting path. |
| Slips do not hold liner load | Casing ID mismatch, unsuitable slip profile, incomplete expansion, damaged teeth or excessive load. | Verify casing ID and grade, slip range, contact area, tooth condition and hanging-load calculation. |
| Running tool fails to release | Residual torque, debris, incorrect string condition, release-profile damage or incomplete hanger setting. | Review neutral-point calculation, rotation direction, axial condition and contingency release procedure. |
| Circulation cannot be re-established | Ball-seat restriction, blocked bypass, solids, incorrect tool position or pressure-induced formation response. | Review flow path, pressure event, pumped volume and approved post-setting circulation sequence. |
| Liner plug does not bump | Incorrect plug profile, leakage, wrong displacement volume, damaged landing collar or fluid bypass. | Verify plug compatibility, liner capacity, pump data, pressure response and landing components. |
| Cement flows back after displacement | Float valve leakage, contaminated sealing surfaces, valve damage or excessive differential pressure. | Review backflow volume, float-equipment test and pressure limits. |
| Liner-top packer leaks | Incomplete setting, seal damage, debris in the PBR, incorrect elastomer or damaged seal bore. | Review setting movement, material compatibility, pressure test and seal-bore inspection. |
| Poor cement isolation | Low standoff, inadequate conditioning, channeling, losses, contamination or incomplete displacement. | Review centralizer program, returns, cement volumes, displacement efficiency and job-pressure data. |
For a broader fault overview, review the liner hanger installation failure guide.
Liner Running in Deviated, Horizontal and Complex Wells
High-angle and horizontal wells reduce the reliability of surface-to-downhole movement transfer and increase drag, contact, cuttings accumulation and pressure-loss sensitivity. The equipment selection and procedure should address the following risks.
Torque and Drag
Confirm the available pickup, slack-off, rotation and set-down response at setting depth. Mechanical movement seen at surface may not equal movement at the hanger.
Protected Slips
A flush or protected running profile helps reduce early casing contact and premature setting through doglegs and restrictions.
Hydraulic Activation
Pressure setting can reduce reliance on string manipulation, but the pressure window must remain separated from circulation and surge pressures.
Bypass and Hole Cleaning
Sufficient annular and internal flow area supports circulation, cuttings removal and conditioning before setting and cementing.
Rotation or Reaming
When rotation, reaming or drill-down is required, the complete hanger and running system must be rated for the planned torque and compression.
Heavy Liner Load
Long liners require verified hanging capacity, slip contact area, casing-load distribution and connection strength.
Compare mechanical and hydraulic liner hanger setting methods before selecting the system for a complex trajectory.
Quality Control, Testing and Documentation
API identifies API Spec 19LH for liner hangers. The ordered qualification and documentation scope should be confirmed against the applicable edition, purchaser specification and project risk level. API Spec 5CT applies to casing and tubing, including relevant tubular and connection requirements; it should not be presented as the product standard for the complete liner hanger.
| Inspection or Test | Purpose | Typical Record |
|---|---|---|
| Material verification | Confirms grade, heat number and traceability of load-bearing components. | MTR, heat-treatment record and traceability list. |
| Chemical and mechanical properties | Verifies the ordered material condition and strength. | Certified test report. |
| UT of critical components | Detects relevant internal discontinuities in mandrels, bodies and thick sections. | NDE report with acceptance criteria. |
| MPI of slips, cones and stressed surfaces | Detects relevant surface or near-surface discontinuities. | MPI report and inspector qualification. |
| Hardness testing | Verifies body condition and, where specified, slip-tooth surface hardness. | Hardness map or inspection report. |
| Dimensional inspection | Confirms OD, ID, stroke, thread and assembly interfaces. | Final dimensional report. |
| Connection gauging | Confirms applicable API or premium connection geometry. | Thread inspection and gauge record. |
| Setting-function test | Confirms the mechanical or hydraulic activation sequence. | Function-test record. |
| Running-tool release test | Confirms primary and, where required, contingency release operation. | Release-test report. |
| Slip-engagement or load test | Verifies anchoring and load-transfer performance for the ordered scope. | Load-test chart and test report. |
| Packer pressure test | Verifies the applicable sealing assembly when a top packer is included. | Pressure chart and test certificate. |
| Third-party inspection | Provides independent witnessing or document review when ordered. | Release note or inspection report. |
Mechanical or Hydraulic Liner Hanger: Which Direction Is Suitable?
| Well or Operational Condition | Selection Direction | Engineering Review |
|---|---|---|
| Vertical or moderate-deviation well with reliable string manipulation | Mechanical setting may be suitable. | Confirm rotation, axial movement, set-down transfer and J-cage sequence. |
| Deep, highly deviated or horizontal well | Hydraulic setting may reduce manipulation requirements. | Confirm circulating pressure, setting window and pressure-activated equipment sequence. |
| Long or heavy liner string | Higher-capacity slips, cones and setting force may be required. | Verify buoyed load, dynamic loads, casing stress and connection capacity. |
| High circulating pressure | Pressure-balanced or anti-preset features require review. | Maintain separation between operational pressure and activation pressure. |
| Reaming or drill-down required | Use a system specifically rated for torque, compression and rotation. | Review running-tool, hanger, packoff and connection torque ratings. |
| Additional liner-top isolation required | Add a compatible top packer or integrated hanger-packer system. | Verify seal material, PBR, setting method and pressure test. |
| Sour or corrosive service | Select the material and hardness package for the specified environment. | Confirm H₂S, CO₂, temperature, fluid chemistry and purchaser requirements. |
For a project-level decision process, see how to select a liner hanger by casing, liner load, trajectory and pressure program.
Shangshanpetro Liner Hanger Product Options
Mechanical Liner Hanger
J-cage or mechanically activated hanger for applications where controlled rotation, axial movement or set-down action can be transferred reliably.
Hydraulic Liner Hanger
Pressure-set system for deep, deviated and horizontal wells where reduced string manipulation is preferred.
Double Cone Double Cylinder Hanger
Hydraulic configuration developed for demanding setting conditions, long liners and increased setting-force requirements.
Top Packer Liner Hanger
Combines liner suspension with a liner-top sealing option when additional annular isolation is required.
Premium Gripping Slips
Protected, heavy-duty slips for anchoring reliability, premature-setting risk reduction and drawing-based replacement.
View All Liner Hanger Systems
Compare available mechanical, hydraulic, packer and replacement-component options for project-specific well programs.
Information Required for Liner Hanger Selection and Quotation
Provide the following information so that the hanger, running clearance, setting method, slips, running tool, cementing components and liner-top equipment can be reviewed as one system.
Frequently Asked Questions
What is the difference between liner running and liner cementing?
Liner running covers the assembly, deployment and positioning of the liner system. Liner cementing covers the fluid conditioning, cement placement, plug displacement and verification used to secure the liner and establish annular isolation.
Is the liner hanger always set before cementing?
Many cemented liner systems set the hanger before cement placement, but the exact sequence depends on the equipment design. The approved tool manual and cementing program must define the sequence for the selected system.
How is a mechanical liner hanger set?
A mechanical hanger is activated by a specified combination of rotation, reciprocation, axial movement or set-down load. This moves the slips over the cones and transfers liner load into the parent casing. The exact direction and movement are model-specific.
How is a hydraulic liner hanger set?
A setting ball or other device establishes a pressure path. Differential pressure acts on a hydraulic piston or cylinders and moves the slips into the set position. Pressure, volume, piston stroke and load transfer should be verified together.
What causes a liner hanger to set prematurely?
Common causes include excessive circulating or surge pressure, unintended mechanical movement, damaged anti-preset components, insufficient running clearance and early contact between exposed slips and the casing wall.
How do engineers know that the hanger is fully set?
The approved procedure may use a combination of pressure response, pumped volume, string-weight change, pickup or slack-off response, mechanical movement and running-tool indication. No single signal should be used without the system-specific acceptance criteria.
What happens if the running tool does not release?
The team should stop and compare the actual string condition with the approved primary and contingency release procedures. Residual torque, drag, debris, incomplete setting or an incorrect tool position may prevent release.
Why does a liner wiper plug fail to bump?
Possible causes include plug and landing-collar mismatch, leakage, an incorrect displacement calculation, a damaged landing profile, fluid bypass or a restriction in the liner. Pumped volume and pressure data should be reviewed before applying additional pressure.
Does every liner hanger include a liner-top packer?
No. The hanger provides mechanical suspension. A separate or integrated liner-top packer is included when an additional annular sealing barrier is required.
Which API specification applies to liner hangers?
API identifies API Spec 19LH for liner hangers. Separate requirements may apply to casing and tubing, connections, liner-top packers, materials and project-specific qualification.
What information is needed to select a liner hanger?
At minimum, provide the parent casing size and drift, liner size and length, hanging load, setting depth, trajectory, circulating pressure, preferred setting method, top-packer requirement, temperature, sour-service condition and connections.
Can a liner hanger system be customized from an existing drawing?
Project-specific hangers, slips and replacement components can be reviewed from an existing drawing, sample, tool model or interface dimensions, subject to engineering verification and agreed inspection requirements.
Related Liner Hanger Engineering Resources
Mechanical vs Hydraulic
Liner Hanger Selection
Installation Failures
Manufacturer Audit
Send Your Liner Running and Cementing Program
Send Shangshanpetro your parent casing, liner size and length, calculated hanging load, setting depth, well trajectory, maximum circulating pressure, hanger setting method, cementing program, liner-top packer requirement, service condition and connection details. Our team will review the system configuration, running clearance and equipment compatibility for quotation.
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