Description
API 7K Hydraulic Casing Power Tong for Drilling and Workover Rigs
SGPE supplies TQ series hydraulic casing power tongs for casing makeup and breakout during drilling, well completion, workover and well-servicing operations.
The equipment is also commonly described as a hydraulic casing power tong, TQ casing tong, casing running tong, casing makeup tong, casing breakout tong, high-torque casing tong or casing power tong with hydraulic backup.
TQ models cover tubular diameters from approximately 4 to 20 in. Maximum torque options range from 16 to 105 kN·m. The series can therefore support smaller workover tubulars, conventional land-rig casing programs, selected premium connections and large-diameter surface casing.
During operation, the main power tong grips and rotates the upper casing joint. The hydraulic backup tong grips the lower joint or coupling and absorbs reaction torque.
High gear is used to spin the connection during initial thread engagement. As the connection approaches its final position, the operator changes to low gear and applies the specified makeup torque. This sequence reduces connection time while giving the crew better control over speed and torque.
The reversible hydraulic motor supports both makeup and breakout. The same tong can therefore install new casing and release existing connections during workover, casing recovery or well abandonment.
Customers may order the main tong alone or request a coordinated casing-running package. Available options include a matching backup tong, hydraulic power unit, tong dies, suspension assembly, lift cylinder, torque-turn monitoring, remote controls, hoses and spare parts.
The tong can operate with a dedicated SGPE HPU. It may also connect to an existing rig hydraulic system after pressure, flow, return-line condition, oil specification and hose connections have been checked.
API 7K Scope and Product Compliance
API Specification 7K does not currently list the hydraulic power tong body as a separate API Monogram product category. Power tongs, including spinning wrenches, were removed from the API 7K Monogram scope in 2016.
API 7K continues to cover related drilling and well-servicing equipment, including manual tongs and snub-lines for manual and power tongs.
SGPE therefore does not describe the hydraulic tong body as API-monogrammed unless a valid certificate specifically covers the stated product.
When an RFQ or tender refers to API 7K, the actual project requirement is reviewed. Depending on the scope, this may include the snub-line, torque reaction arrangement, hydraulic backup, safety interlocks, controls, load testing, torque testing, material traceability and inspection records.
This approach avoids inaccurate certification claims and helps the buyer obtain equipment that matches the casing program, rig arrangement and approved inspection plan.
TQ Hydraulic Casing Power Tong Models
The following data supports preliminary selection. Final values remain subject to the approved technical datasheet, selected jaw set, production revision and project configuration.
TQ Series Performance Parameters
| Model | Applicable Pipe Range | Maximum Torque | Hydraulic Pressure | Working Flow | Low Speed | High Speed |
|---|---|---|---|---|---|---|
| TQ178/16Y | 4–7 in. / 101.6–177.8 mm | 16 kN·m / 12,000 ft-lb | 18 MPa / 2,610 psi | 100–160 L/min / 26–42 gpm | 12–19.5 rpm | 77–123 rpm |
| TQ219/25Y | 4 1/2–8 5/8 in. / 114.3–219.1 mm | 25 kN·m / 18,400 ft-lb | 20 MPa / 2,900 psi | 110–170 L/min / 29–45 gpm | 9–11 rpm | 50–60 rpm |
| TQ340/35Y | 4–13 3/8 in. / 101.6–339.7 mm | 35 kN·m / 25,800 ft-lb | 20 MPa / 2,900 psi | 110–170 L/min / 29–45 gpm | 4–14 rpm | 50–90 rpm |
| TQ340/85Y | 4 1/2–13 3/8 in. / 114.3–339.7 mm | 85 kN·m / 62,700 ft-lb | 17.2 MPa / 2,500 psi | 110–170 L/min / 29–45 gpm | 3.2–5 rpm | 30–45 rpm |
| TQ356/55Y | 4 1/2–14 in. / 114.3–355.6 mm | 55 kN·m / 40,560 ft-lb | 20 MPa / 2,900 psi | 110–170 L/min / 29–45 gpm | 4–6 rpm | 28–45 rpm |
| TQ356/105Y | 4 1/2–14 in. / 114.3–355.6 mm | 105 kN·m / 77,450 ft-lb | 17.2 MPa / 2,500 psi | 140–200 L/min / 37–52.8 gpm | 2.7–4 rpm | 14.5–21 rpm |
| TQ406/75Y | 8 5/8–16 in. / 219.1–406.4 mm | 75 kN·m / 55,300 ft-lb | 16.6 MPa / 2,400 psi | 110–170 L/min / 29–45 gpm | 3.3–6.2 rpm | 20.5–45 rpm |
| TQ508/70Y | 9 5/8–20 in. / 244.5–508 mm | 70 kN·m / 51,600 ft-lb | 20 MPa / 2,900 psi | 110–170 L/min / 29–45 gpm | 4.6–7.3 rpm | 30.5–48 rpm |
Actual rotation speed varies with hydraulic flow, applied load, motor condition and system settings.
Dimensions, Weight and Recommended Backup Tong
| Main Tong Model | Overall Dimensions | Approx. Weight | Recommended Backup Tong |
| TQ178/16Y | 1,480 × 760 × 820 mm | 630 kg / 1,380 lb | TB194/16Y |
| TQ219/25Y | 1,460 × 840 × 1,080 mm | 720 kg / 1,580 lb | TB245/25Y |
| TQ340/35Y | 1,580 × 900 × 860 mm | 760 kg / 1,670 lb | TB365/35Y |
| TQ340/85Y | 1,995 × 1,150 × 680 mm | 1,700 kg / 3,740 lb | TB365/85Y |
| TQ356/55Y | 1,770 × 960 × 780 mm | 1,100 kg / 2,420 lb | TB381/55Y |
| TQ356/105Y | 1,950 × 1,210 × 860 mm | 1,800 kg / 3,960 lb | Project-specific hydraulic backup tong |
| TQ406/75Y | 1,950 × 1,290 × 1,200 mm | 1,700 kg / 3,740 lb | TB432/75Y |
| TQ508/70Y | 2,080 × 1,280 × 760 mm | 1,550 kg / 3,410 lb | TB559/70Y |
A different backup tong may be required when the project involves oversized couplings, special gripping positions or higher breakout torque.
Recommended Model by Casing Program
| Operating Requirement | Recommended Model |
| Small-diameter casing and workover tubulars | TQ178/16Y |
| Casing up to 8 5/8 in. | TQ219/25Y |
| General casing up to 13 3/8 in. | TQ340/35Y |
| High-torque casing up to 13 3/8 in. | TQ340/85Y |
| General casing up to 14 in. | TQ356/55Y |
| High-torque premium connections up to 14 in. | TQ356/105Y |
| Large casing from 8 5/8 to 16 in. | TQ406/75Y |
| Surface and large-diameter casing up to 20 in. | TQ508/70Y |
These recommendations provide an initial reference. Coupling clearance, connection type, makeup torque, breakout torque and available hydraulic power must also be confirmed.
Need Help Selecting a TQ Casing Tong?
Send the casing body OD, maximum coupling OD, connection type, required makeup torque and available hydraulic pressure and flow.
SGPE can review the main tong, hydraulic backup, HPU and jaw configuration as one complete casing-running package.
Main Features of the Hydraulic Casing Power Tong
Controlled Makeup and Breakout
The hydraulic drive provides steady rotation throughout the connection cycle.
High gear shortens spinning time during initial engagement. Low gear gives the operator better control during final makeup and difficult breakout.
The reversible motor supports clockwise and counterclockwise rotation. The same unit can therefore operate as both a casing makeup tong and a casing breakout tong.
Torque Range from 16 to 105 kN·m
The TQ series covers light-, medium- and high-torque casing operations.
Compact models suit smaller workover tubulars and routine casing programs. Higher-capacity models such as the TQ340/85Y and TQ356/105Y are intended for more demanding makeup and breakout requirements.
Normal makeup torque does not always determine the correct model. Corrosion, thermal cycling and extended service can increase breakout torque. Model selection should therefore allow a practical operating reserve.
Casing Sizes from 4 to 20 Inches
The TQ range covers common oilfield casing and tubular diameters from approximately 4 to 20 in.
Smaller models handle workover tubulars and casing up to 7 or 8 5/8 in. Mid-range units cover casing up to 13 3/8 or 14 in. Large-bore models handle casing up to 16 or 20 in.
The supplied jaw and die schedule determines the exact gripping range. Buyers should provide the casing body OD and maximum coupling OD rather than relying on nominal pipe size alone.
Hydraulic Backup Tong
The main tong rotates the upper casing joint. The backup tong grips the lower joint or coupling and absorbs reaction torque.
This arrangement prevents the lower section from turning and gives the operator more control than a manual or uncontrolled reaction system.
Standard, high-capacity and large-opening backup tongs are available. Casing jaws, coupling jaws and torque measurement at the backup can also be included.
Open-Head Design
The open-head structure allows the tong to move directly onto or away from the casing.
The crew does not need to pass the full tubular through the tong body. This saves positioning time and provides easier access to the jaw carrier, dies and rotary assembly.
Multi-Speed Transmission
TQ casing power tongs combine a hydraulic motor with a mechanical gearbox.
High gear provides faster spinning during thread engagement. Low gear supplies controlled torque for final makeup and breakout.
Available speed and torque depend on the selected gear, hydraulic pressure, flow and applied load.
Replaceable Jaws and Tong Dies
Jaws and dies transfer torque from the rotary assembly to the casing surface.
The correct gripping parts depend on the casing OD, coupling OD, material grade, wall thickness, surface condition and required torque.
Standard serrated dies suit many conventional casing operations. Coated casing or premium connections may require reduced-marking dies or special inserts.
Correct gripping parts reduce slippage, uneven loading and avoidable casing damage.
Torque Monitoring Options
A hydraulic torque gauge provides basic torque indication for conventional casing work.
For premium connections and critical well programs, an electronic torque-turn system can display torque, RPM, total turns, shoulder torque, delta torque and final torque.
The system can store joint numbers, generate torque-versus-turn curves and show a pass or reject result. This provides a traceable connection record for the drilling contractor or well operator.
Typical Casing Power Tong Supply Scope
| Equipment or Component | Typical Supply Status | Selection Notes |
| Main hydraulic casing power tong | Standard | Select according to casing range and torque |
| Main tong jaw and die set | Standard or project-specific | Confirm each required casing OD |
| Hydraulic backup tong | Optional | Recommended for controlled torque reaction |
| Backup jaw and die set | Optional | Match casing body or coupling OD |
| Hydraulic torque gauge | Optional | Provides basic torque indication |
| Electronic torque-turn system | Optional | Recommended for premium connections |
| Hydraulic lift cylinder | Optional | Adjusts tong height above the rig floor |
| Spring hanger or suspension assembly | Optional | Select according to tong weight |
| Electric hydraulic power unit | Optional | Confirm voltage, frequency and area classification |
| Diesel hydraulic power unit | Optional | Suitable for remote drilling locations |
| Hydraulic hose package | Optional | Confirm length, bore and couplings |
| Remote control panel | Optional | Hydraulic or electro-hydraulic |
| Commissioning spare kit | Optional | Supports installation and startup |
| Two-year maintenance spare kit | Optional | Configure according to the expected duty cycle |
The quotation clearly identifies included and excluded items. This prevents misunderstandings about the backup tong, HPU, hoses, torque monitoring and spare parts.
Oilfield Applications
Land Drilling Rig Casing Running
The hydraulic casing power tong can run surface casing, intermediate casing and production casing on conventional land rigs.
The TQ340/35Y and TQ356/55Y suit many routine programs. Higher-torque models provide additional capacity where the connection or breakout requirement exceeds the standard range.
Offshore Casing Running
An offshore casing power tong package can support jack-up rigs, platform rigs, fixed platforms, semi-submersible units and offshore workover packages.
Project-specific options may include a marine coating system, stainless-steel hydraulic fittings, remote controls, special preservation and mechanized positioning equipment.
The final configuration should follow the approved environmental, electrical and hazardous-area requirements.
Workover and Well-Servicing
Compact TQ casing tongs can support casing pulling, casing repair, well re-entry, well abandonment and casing replacement.
The reversible motor allows the same workover casing tong to make up new connections and break out existing ones.
Surface and Intermediate Casing
TQ340, TQ356 and TQ406 models cover many common surface and intermediate casing programs.
Because coupling OD may exceed casing body OD, the final selection must account for the main tong opening, backup opening and jaw range.
Production Casing and Premium Connections
High-torque configurations can run production casing with API threads or selected premium connections.
Where the connection manufacturer specifies torque and turn limits, a torque-turn system can help the rig crew keep each connection within the approved acceptance window.
Large-Diameter Casing
The TQ508/70Y covers casing from approximately 9 5/8 to 20 in. It can support large surface casing and conductor-related work within its approved torque range.
Large-diameter operations also require sufficient rig-floor space, lifting capacity and hydraulic flow. Suspension and positioning must therefore form part of the equipment review.
Replacement and Rig Upgrade Projects
An old, damaged or discontinued casing tong can often be replaced with an equivalent TQ configuration.
The comparison should cover casing range, tong opening, backup opening, torque capacity, hydraulic pressure, flow, dimensions, weight and hose connections.
Rig-floor space and suspension capacity should also be checked before confirming the replacement.
Supported Casing Connections
| Connection Type | Typical Application | Main Selection Considerations |
| API 8-Round casing connection | Standard casing strings | Makeup torque, casing OD and coupling OD |
| API Buttress Thread Casing (BTC) connection | Surface, intermediate and production casing | Torque range and rotation speed |
| Premium gas-tight connection | High-pressure and critical wells | Torque-turn monitoring and controlled speed |
| Semi-premium connection | Drilling and completion programs | Manufacturer’s running procedure |
| Flush-joint casing connection | Restricted-clearance applications | Jaw profile and tong opening |
| Conductor casing connection | Large-diameter well construction | Main tong opening, backup opening and positioning |
| Coupled casing connection | General casing-running operations | Coupling OD and backup jaw range |
Customers should provide the latest running procedure from the connection manufacturer.
This document should define the minimum, recommended and maximum makeup torque. It may also specify allowable RPM, shoulder torque, total turns, delta torque and the connection acceptance window.
Hydraulic Power Unit Requirements
The hydraulic supply controls tong speed and available torque.
Insufficient flow slows the tong. Insufficient pressure limits torque. Excessive pressure may overload the hydraulic motor, gearbox, jaw system or casing connection.
TQ Series Hydraulic Reference Range
| Hydraulic Parameter | Typical TQ Series Requirement |
| Rated Pressure | 16.6–20 MPa / approximately 2,400–2,900 psi |
| Working Flow | 100–200 L/min / approximately 26–52.8 gpm |
| Hydraulic Fluid | Clean anti-wear hydraulic oil |
| Return Line | Low back pressure |
| Filtration | Match the motor and valve requirements |
| Cooling | Recommended for continuous or hot-climate operation |
| Pressure Regulation | Set according to the selected tong model |
| Hose Size | Confirm from flow and hose length |
| Connection Type | Confirm before production |
| Drive Source | Electric motor, diesel engine or approved rig HPU |
Before an existing rig HPU is approved, maximum and continuous pressure, continuous and peak flow, return-line pressure and oil specification must be checked.
Compatibility also depends on filtration, cooling capacity, hose bore, quick-coupling type and expected duty cycle.
Where the rig system cannot provide the required performance, SGPE can supply a dedicated skid-mounted electric or diesel hydraulic power unit.
Torque-Turn Monitoring for Premium Connections
A torque-turn system provides traceable makeup data for premium casing and critical well programs.
A load cell or pressure sensor supplies the torque signal. An encoder or rotation sensor measures turns and speed. The software combines these signals and displays the connection response.
| Monitoring Function | Purpose |
| Real-time torque display | Shows current connection torque |
| Turn counting | Records connection turns |
| RPM monitoring | Helps control makeup speed |
| Shoulder detection | Identifies the shoulder point |
| Delta torque calculation | Compares shoulder and final torque |
| Torque-versus-turn curve | Displays connection behavior |
| Minimum and maximum limits | Defines the acceptance window |
| Alarm output | Warns of abnormal makeup |
| Joint number recording | Creates a traceable joint history |
| Job and well information | Identifies the drilling project |
| Data export | Supports customer reporting |
| Pass or reject result | Provides immediate connection assessment |
The system must use the connection manufacturer’s approved torque and turn criteria.
Torque-turn monitoring improves traceability, but it does not replace correct thread inspection, approved thread compound or proper casing alignment.
Main Components of the TQ Hydraulic Casing Power Tong
Tong Body and Open Rotary
The tong body supports the hydraulic motor, gearbox, rotary assembly, jaw system and control valves.
The open rotary allows the operator to position the equipment around the casing and remove it after completing the connection.
Hydraulic Motor and Gearbox
The hydraulic motor converts oil pressure and flow into rotary movement. Motor displacement and hydraulic input directly affect speed and available torque.
The gearbox transfers motor output to the rotary gear. High gear increases spinning speed, while low gear provides controlled torque for final makeup and breakout.
Jaw Carrier and Tong Dies
The jaw carrier moves the dies into contact with the casing as the rotary begins to turn.
Each jaw and die set must match the approved tubular diameter. Incorrect gripping parts may cause slippage, uneven loading, unstable torque readings or excessive casing marking.
Hydraulic Backup Tong
The backup grips the lower casing joint or coupling and provides the reaction point required for controlled makeup and breakout.
Its opening, jaw range and torque capacity must match the main tong and casing program.
Controls, Suspension and Lift
The control valve assembly regulates rotation direction, speed, hydraulic pressure and backup clamping. It may also control the lift cylinder and other optional hydraulic functions.
The suspension system supports the tong above the rig floor and allows the operator to adjust its height and position.
Available arrangements may include a spring hanger, wire rope, counterbalance, hydraulic lift cylinder or rig-floor positioning frame.
How the Casing Power Tong Works
Step 1: Align the Casing Joint
The rig crew lowers the upper casing joint and aligns the pin with the coupling or box below.
A casing stabbing guide can help maintain alignment and reduce cross-threading risk.
Step 2: Position the Main Tong and Backup
The operator opens the tong head and places it around the upper casing joint.
After confirming the position, the operator closes the access door and engages the hydraulic backup on the lower joint or coupling.
Step 3: Spin the Connection
The main tong rotates the upper joint at high speed and low torque during initial thread engagement.
The operator monitors alignment and thread response. If the casing wobbles, the thread does not engage correctly or resistance increases unexpectedly, the tong should be stopped and the connection inspected.
Step 4: Apply and Record Final Torque
As the connection approaches its final position, the operator changes to low gear and applies the specified makeup torque.
When torque-turn monitoring is included, the system records torque, turns, speed and the connection curve. The result can then be compared with the approved acceptance limits.
Step 5: Release and Reposition
After the connection meets the required criteria, the operator releases the main tong and backup.
The crew can then raise or reposition the system for the next casing joint.
How to Select the Correct Casing Power Tong
Casing and Coupling Dimensions
Provide the casing body OD and maximum coupling OD.
Because the coupling may exceed the pipe body diameter, it can affect the main tong opening, backup opening and jaw configuration.
Makeup and Breakout Torque
Provide the minimum, recommended and maximum makeup torque together with expected breakout torque.
The latest running procedure from the connection manufacturer should form part of the review.
A suitable tong requires enough operating reserve. Continuous operation at maximum rated torque may reduce service life and leave too little capacity for difficult breakout work.
Available Hydraulic Power
State the available hydraulic pressure, continuous flow, return-line pressure, oil type and cooling capacity.
Hose bore and coupling type also affect performance. These details determine whether the rig HPU can deliver the required speed and torque.
Rig Type and Environment
Confirm whether the tong will operate on a land rig, jack-up rig, offshore drilling unit, platform rig, workover rig or mobile well-servicing unit.
For offshore service, also provide ambient conditions, corrosion-protection requirements, hydraulic fitting material and hazardous-area classification.
Backup, Controls and Monitoring
The backup must match the main tong opening and torque capacity.
Confirm whether the project requires a standard backup, high-capacity backup, large-opening backup, special coupling jaws or torque measurement at the backup.
Control options may include direct hydraulic operation, remote hydraulic control or an electro-hydraulic panel.
Torque measurement options include a hydraulic gauge, digital torque display and complete torque-turn monitoring system.
Request a Technical Selection Review
Send the casing program, connection data and available hydraulic supply.
SGPE can review the main tong, backup tong, HPU, jaw sets, suspension equipment and monitoring requirements as one coordinated package.
Installation, Operation and Safety
The main tong and hydraulic backup should align with the casing centerline. Poor alignment can cause uneven die contact, casing bending, unstable torque readings and excessive loading on the backup structure.
Before commissioning, verify the suspension-point capacity and operating height. Confirm tong alignment, hydraulic pressure, flow, hose length, hose bore and connection type.
The installation team should also check the torque reaction arrangement, door clearance, emergency-stop access and torque calibration.
Before running casing, operate the system without load. Test makeup and breakout directions, high and low gear, jaw engagement, backup clamping, lift-cylinder movement, door interlock, emergency stop, torque display and remote controls.
Inspect all hydraulic connections for leakage before the first operating cycle.
Before makeup, install the correct jaws and dies. Clean and inspect the pin and box, apply the approved thread compound and confirm the target torque.
Begin at a controlled speed. Stop the tong if the casing wobbles, the thread does not engage correctly or resistance increases unexpectedly.
For premium connections, follow the approved limits for makeup torque, total turns, shoulder torque, delta torque and RPM.
During breakout, confirm the rotation direction and expected breakout torque. Do not continue increasing hydraulic pressure after the tong reaches its rated limit.
A safe package should include an effective door interlock, emergency stop and pressure-relief valve.
Protect hydraulic hoses from impact, abrasion and sharp bends. Guards should cover exposed rotating parts, and all controls should carry clear markings.
The rig crew should establish an exclusion zone around the tong. Personnel must keep hands, clothing and tools away from the rotary, jaws, coupling and access door while hydraulic power remains active.
Maintenance Recommendations
Daily Checks
Inspect the tong for hydraulic leakage, damaged hoses and loose fittings at the start of each shift.
Check the jaws, dies, door latch, control levers, suspension components and backup alignment. During the no-load test, listen for unusual gearbox noise.
Replace damaged or heavily worn parts before operation.
Weekly Checks
Check the gearbox oil level and hydraulic filter condition.
Inspect motor mounting bolts, rotary gear lubrication, jaw carrier movement, lift cylinder, backup tong, torque sensor, electrical cables and remote controls.
Correct minor problems before they cause downtime.
Periodic Maintenance
Follow the approved maintenance manual when replacing gearbox oil, filters, seals and hoses.
Periodic work should also cover the hydraulic motor, bearings, gear backlash and structural components.
Calibrate the pressure gauge, load cell and torque-turn system at the specified intervals. Replace worn dies before they begin to slip or damage the casing surface.
Inspection, Testing and Documentation
SGPE can arrange inspection according to the approved purchase order, technical datasheet and inspection plan.
| Inspection Item | Typical Scope |
| Visual Inspection | Workmanship, marking and completeness |
| Dimensional Inspection | Main dimensions and interfaces |
| Hydraulic Pressure Test | Pressure holding and leakage |
| No-Load Running Test | Direction, speed and controls |
| Torque Test | According to the approved procedure |
| Gear-Shifting Test | Low- and high-speed operation |
| Jaw Function Test | Engagement and release |
| Backup Tong Test | Clamping and release |
| Door Interlock Test | Safety function |
| Emergency Stop Test | Shutdown response |
| Torque Calibration | Gauge, sensor or load cell |
| Coating Inspection | Paint and preservation |
| Final Document Review | Manuals, reports and certificates |
Third-party inspection can be coordinated when required by the approved inspection plan.
The final document package may include the product datasheet, general arrangement drawing, hydraulic schematic and applicable electrical drawing.
It may also include the operation manual, maintenance manual, spare-parts list, packing list and certificate of conformity.
Where required by the purchase order, SGPE can provide hydraulic test reports, functional test reports, torque test records, calibration certificates and a final inspection report.
Installation, preservation and storage instructions can also form part of the final document package.
Casing Power Tong Spare Parts
SGPE supplies spare parts for new casing tong packages and selected existing TQ models.
Available gripping and transmission parts include tong dies, inserts, jaw assemblies, jaw carriers, rotary gears, idler gears, pinions and bearings.
Hydraulic parts may include motors, control valves, directional valves, relief valves, cylinders, seal kits, hoses and quick couplings.
Instrumentation and control parts can include pressure gauges, load cells, encoders and door-interlock components.
Springs, pins, bushings, gearbox seals, lift-cylinder parts and hydraulic backup components are also available for selected models.
For accurate identification, provide the tong model, serial number and part number. Clear photographs and main dimensions help distinguish between similar components and production revisions.
Why Choose SGPE‘s API 7K Hydraulic Casing Power Tongs ?
SGPE selects each hydraulic casing power tong from the complete casing program rather than nominal pipe size alone.
The review covers casing and coupling dimensions, connection type, makeup and breakout torque, hydraulic supply, backup capacity, suspension requirements and rig-floor arrangement.
Customers can order the main tong alone or a coordinated package with hydraulic backup, HPU, torque-turn monitoring, remote controls, lift equipment and spare parts.
For replacement projects, SGPE compares the existing tong dimensions, hydraulic interfaces and operating requirements before recommending an equivalent configuration.
Project-specific inspection records, test reports, operating manuals and technical documents can be included when required by the purchase order.
Frequently Asked Questions About API 7K Casing Power Tongs
1. What is an API 7K casing power tong?
An API 7K casing power tong commonly refers to a hydraulic tong used for casing makeup and breakout during drilling, completion, workover and well-servicing operations.
The hydraulic power tong body does not currently fall within the API 7K Monogram scope. SGPE reviews the actual testing, safety and documentation requirements rather than describing the tong body as API-monogrammed.
2. Which TQ hydraulic casing power tong should I choose?
The correct model depends on casing OD, maximum coupling OD, connection type, required torque and available hydraulic power.
TQ178 and TQ219 models suit smaller tubulars. TQ340 and TQ356 models cover many 13 3/8-in. and 14-in. casing programs. TQ406 and TQ508 models handle larger casing up to 16 and 20 in.
Breakout torque, coupling clearance, rig-floor layout and suspension capacity also affect the final choice.
3. What casing sizes can the TQ series handle?
The TQ series covers tubular diameters from approximately 4 to 20 in. across several models.
No single tong covers the entire range. Provide the casing body OD and maximum coupling OD because an oversized coupling may require a wider main tong, larger backup or special jaw set.
4. How much torque does a hydraulic casing power tong provide?
The listed models provide maximum torque from 16 to 105 kN·m, or approximately 12,000 to 77,450 ft-lb.
Model selection should consider both makeup and breakout torque because a connection may require more torque during removal than during initial installation.
5. Which casing power tong suits 13 3/8-inch casing?
The TQ340/35Y suits many standard 13 3/8-in. casing-running operations and provides maximum torque up to 35 kN·m.
Where more torque is required, the TQ340/85Y provides up to 85 kN·m. Coupling OD, connection type and hydraulic supply determine which model is more suitable.
6. Which casing tong handles 16-inch or 20-inch casing?
The TQ406/75Y covers casing from approximately 8 5/8 to 16 in.
The TQ508/70Y handles casing from approximately 9 5/8 to 20 in.
Large-diameter work also requires sufficient backup opening, lifting capacity, rig-floor clearance and hydraulic flow.
7. Why is a hydraulic backup tong required?
The main tong rotates the upper joint, while the backup grips the lower joint or coupling.
The backup absorbs reaction torque and prevents the lower casing section from turning. Its opening and torque capacity must match the main tong and casing program.
8. Can the tong use the rig’s existing hydraulic system?
The tong can use an existing rig HPU when pressure, flow, return-line condition, oil specification and cooling capacity match the selected model.
TQ casing tongs generally require approximately 16.6 to 20 MPa of pressure and 100 to 200 L/min of flow.
SGPE can supply an electric or diesel HPU when the rig system cannot meet these requirements.
9. Can the casing power tong handle premium connections?
Selected TQ configurations can handle premium casing connections when they provide the required torque, controlled speed, suitable dies and accurate monitoring.
The customer must provide the connection manufacturer’s latest running procedure. A torque-turn system can then monitor torque, turns, RPM, shoulder torque, delta torque and the connection curve.
10. How should casing tong jaws and dies be selected?
The jaw and die set must match the casing OD, coupling OD, surface condition and required torque.
Standard serrated dies suit many conventional operations. Premium or coated casing may require reduced-marking dies or special inserts.
Incorrect or worn dies can cause slippage, casing damage and unstable torque readings.
11. Can SGPE replace an existing casing power tong?
Yes. SGPE can review an old, damaged or discontinued casing tong and propose an equivalent replacement or spare-parts package.
For a complete replacement, provide the manufacturer, model, serial number, nameplate, casing range, torque rating, hydraulic data, dimensions and equipment photographs.
For individual parts, provide the part number, photograph and main dimensions.
12. What information is needed for a quotation?
Provide the casing size range, maximum coupling OD, connection type, makeup torque, expected breakout torque and available hydraulic pressure and flow.
Also confirm the rig type, backup requirement, torque-turn requirement, suspension method, inspection scope, quantity and delivery destination.
For replacement equipment, include the existing datasheet, nameplate and complete photographs.
Information Required for Quotation
| Required Information | Customer Details |
| Preferred TQ Model | |
| Minimum Casing OD | |
| Maximum Casing OD | |
| Maximum Coupling OD | |
| Casing Grade | |
| Wall Thickness | |
| Connection Type | |
| Connection Manufacturer | |
| Recommended Makeup Torque | |
| Maximum Makeup Torque | |
| Expected Breakout Torque | |
| Required Rotation Speed | |
| Available Hydraulic Pressure | |
| Available Hydraulic Flow | |
| Return-Line Pressure | |
| Hydraulic Oil Type | |
| Hose Connections | |
| Rig Type | |
| Land or Offshore Location | |
| Backup Tong Requirement | |
| Torque-Turn System Requirement | |
| Remote Control Requirement | |
| Lift or Positioning Requirement | |
| Ambient Temperature | |
| Hazardous-Area Requirement | |
| Offshore Coating Requirement | |
| Required Inspection | |
| Required Documentation | |
| Quantity | |
| Delivery Destination |
Request an API 7K Hydraulic Casing Power Tong Price
Please also state whether the project requires a hydraulic backup tong, dedicated HPU, torque-turn monitoring system, remote controls, hydraulic lift cylinder or positioning frame.
For offshore service, include the corrosion-protection and hazardous-area requirements. You can also request a commissioning spare kit, maintenance spare-parts package and third-party inspection.
For a replacement project, provide the existing manufacturer, model, serial number, nameplate photograph, technical datasheet and complete equipment photographs.
E-Mail:
info@sgpe.com
