Core Purpose & Application Overview
This manual tong is fully compliant with API SPEC 7K standards, specifically designed for makeup and breakup of pipe connections in oilfield drilling, well completion, and pipe handling scenarios. It caters to the细分需求 (segmented needs) of oilfield operation teams, drilling contractors, and maintenance personnel who require high-torque, size-adjustable pipe connection tools. The tool adapts to different pipe outer diameters (OD) by replacing lug jaws and hinge jaws, ensuring reliable torque transmission and operational safety for critical pipe connection tasks.
Main Manual Tong Unit (Core Equipment)
The core manual tong unit is engineered to deliver the required torque capacity for pipe makeup/breakup, with adjustable OD compatibility via jaw replacement. Compliant with API SPEC 7K, it solves the pain point of frequent tool replacement for different pipe sizes, enhancing on-site operational efficiency and reducing downtime.
No. | Product Name | Specifications | Material | Main Wear Reason | Usage Precaution (Avoid Damage) |
1 | Manual Tong (API SPEC 7K) | Size Range: 3-1/2 – 17 (INCH); Rated Torque: 65,000 FT.LBS (88KN.M); Complete with Standard Lever 4 FT (48 INCH), Hanger Long Jaw, Short Jaw and Latch Assembly (Less Lug Jaw 1 Set 2 PCS) | High-strength alloy steel (API SPEC 7K Grade D), heat-treated for wear resistance and impact toughness | Continuous high-torque operation causes metal fatigue on the lever and hinge connection, combined with corrosion from on-site drilling fluid and harsh environmental conditions | Avoid overloading beyond the rated torque (65,000 FT.LBS) during operation; regularly clean the hinge and lever connection with neutral detergent to remove drilling fluid residue, and apply anti-corrosion lubricant after cleaning |
Lug Jaw Assemblies (Replaceable Components)
Lug jaw assemblies are key replaceable parts for adjusting the manual tong to different pipe OD sizes, directly affecting torque transmission accuracy and pipe surface protection. Compliant with API SPEC 7K Clause 5.7, they eliminate the need for multiple tongs, reducing equipment investment and storage space.
No. | Product Name | Specifications | Material | Main Wear Reason | Usage Precaution (Avoid Damage) |
1 | Lug Jaw Assy. | 3-1/2″ – 8-1/4″ | Wear-resistant alloy steel with carburized surface treatment, compliant with API SPEC 7K material requirements | Friction between jaw teeth and pipe surface during makeup/breakup, aggravated by improper jaw-pipe size matching (using undersized jaw for large pipes) | Ensure the jaw size matches the pipe OD exactly; avoid using a jaw that is too small or too large, and inspect jaw teeth for wear before each use—replace if teeth are worn more than 1mm |
2 | Lug Jaw Assy. | 8″ – 11-1/4″ | Wear-resistant alloy steel with carburized surface treatment, compliant with API SPEC 7K material requirements | Impact loading during sudden torque application, which causes microcracks on jaw edges and accelerates wear over time | Apply torque gradually during operation, avoiding sudden force application; store jaws in a dry, dust-free environment to prevent rust, which can weaken the jaw structure |
3 | Lug Jaw Assy. | 11-3/4″ – 14-3/8″ | Wear-resistant alloy steel with carburized surface treatment, compliant with API SPEC 7K material requirements | Corrosion from exposure to saltwater (offshore operations) or acidic drilling fluid, which degrades the jaw’s surface hardness and wear resistance | For offshore or corrosive environments, clean jaws with fresh water after each use and apply a corrosion-resistant coating; avoid contact with strong acids or alkalis |
4 | Lug Jaw Assy. | 16″ – 17″ | Wear-resistant alloy steel with carburized surface treatment, compliant with API SPEC 7K material requirements | Over-tightening of pipe connections, which causes excessive pressure on the jaw teeth and leads to premature wear or tooth breakage | Monitor torque during operation using a torque gauge to ensure it does not exceed the tong’s rated capacity; replace jaws immediately if teeth are chipped or cracked |
Hinge Jaw Assembly (Replaceable Component)
The hinge jaw assembly is a critical replaceable part that ensures smooth hinge movement and stable torque transmission for pipes with OD 8″–17″. Compliant with API SPEC 7K Clause 5.8, it addresses the pain point of hinge jamming, which can cause operational delays and tool damage.
No. | Product Name | Specifications | Material | Main Wear Reason | Usage Precaution (Avoid Damage) |
1 | Hinge Jaw Assy. | 8″ – 17″ | High-strength alloy steel with quenched and tempered treatment, hinge surface coated with wear-resistant alloy | Lack of lubrication on the hinge surface, leading to metal-to-metal friction and wear of the hinge pin hole, resulting in loose jaw movement | Lubricate the hinge surface and pin hole with high-temperature, anti-wear lubricant before each use; inspect for hinge looseness regularly, and replace the assembly if the pin hole is worn more than 0.5mm |
Auxiliary Components (Critical Spare Parts)
Auxiliary components (die, die retainer pin, etc.) are essential for the manual tong’s normal operation and durability. Compliant with API SPEC 7K, they prevent tool failure caused by missing or damaged spare parts, ensuring continuous on-site operation.
No. | Product Name | Specifications | Material | Main Wear Reason | Usage Precaution (Avoid Damage) |
1 | Die | Matching API SPEC 7K Manual Tong, compatible with all specified pipe sizes | Tungsten carbide insert + alloy steel base, high hardness and wear resistance | Friction with pipe surface during makeup/breakup, combined with improper alignment leading to uneven pressure on the die surface | Ensure the die is properly aligned with the pipe surface before applying torque; avoid using damaged dies (with cracks or missing inserts) as they can damage the pipe and the tong |
2 | Die Retainer Pin | Matching API SPEC 7K Manual Tong and Die | High-strength carbon steel, heat-treated for tensile strength | Shear force caused by improper die installation (die not fully seated) and sudden torque changes during operation | Ensure the die is fully seated in the jaw before inserting the retainer pin; check the pin for bending or wear regularly, and replace if any deformation is found |
3 | Latch Spring | Matching API SPEC 7K Manual Tong Latch Assembly | Stainless steel spring wire, corrosion-resistant and fatigue-resistant | Fatigue from frequent latch operation (opening/closing) and corrosion from on-site moisture or drilling fluid | Avoid excessive force when opening/closing the latch; clean the spring with a dry cloth regularly to remove moisture and debris, and replace if the spring loses elasticity (fails to reset the latch) |
4 | Hinge Pin | Matching API SPEC 7K Manual Tong Hinge Assembly | Chromium-plated alloy steel, high wear resistance and corrosion resistance | Abrasion from hinge movement and lack of lubrication, leading to surface scratches and reduced fit with the hinge hole | Lubricate the hinge pin with anti-wear lubricant weekly; avoid hitting the pin with heavy tools, as this can cause deformation and affect hinge movement |
5 | Hinge Pin Nut | Matching API SPEC 7K Manual Tong Hinge Pin | High-strength alloy steel, anti-loosening design | Vibration during tong operation, leading to nut loosening and subsequent wear on the thread; corrosion from environmental factors | Tighten the nut to the specified torque (per API SPEC 7K Clause 6.3) before each use; use a lock washer if necessary to prevent loosening, and replace if threads are stripped or corroded |
On-Site Fault Maintenance Cases (Real Examples)
Case 1: Hinge Jamming Failure
A drilling team encountered hinge jamming during pipe makeup operation. Inspection found that the hinge pin was severely worn due to lack of lubrication, and the hinge jaw assembly’s pin hole was corroded. Solution: Replace the hinge pin and hinge jaw assembly, clean the hinge area, and implement a weekly lubrication schedule (per API SPEC 7K Clause 7.2). The tong resumed normal operation without further jamming.
Case 2: Lug Jaw Tooth Breakage
During offshore pipe breakup, a lug jaw (8″–11-1/4″) had tooth breakage. Investigation revealed that the jaw was used with a pipe larger than its maximum OD (11-1/4″), causing excessive pressure on the teeth. Solution: Replace the lug jaw with the correct size (11-3/4″–14-3/8″), train the team on size matching, and add a size label on each jaw to avoid misapplication.
FAQ
No. | Question | Answer |
1 | How to confirm if the manual tong and its components are compliant with API SPEC 7K? | All products are manufactured in accordance with API SPEC 7K clauses (5.7, 5.8, 6.3, 7.2, etc.). Each unit and component is accompanied by a compliance certificate, which includes material test reports and torque performance test results. |
2 | What is the service life of the lug jaw assemblies under normal operation? | Under normal operation (correct size matching, regular lubrication, and compliance with rated torque), lug jaws have a service life of 6–12 months (depending on usage frequency). Regular inspection (weekly) can extend service life by detecting wear early. |
3 | Can the manual tong be used for both onshore and offshore operations? | Yes. All components (especially lug jaws, hinge pin, and latch spring) are made of corrosion-resistant materials, suitable for offshore saltwater environments. It is recommended to enhance cleaning and lubrication frequency for offshore use to prevent corrosion. |
Procurement Guide
All products listed above are fully compliant with API SPEC 7K standards, manufactured with high-quality materials and strict quality control to ensure operational safety and durability. They effectively solve on-site pain points such as frequent tool replacement, component wear, and operational delays. Whether you need the core manual tong unit, replaceable jaws, or auxiliary spare parts, we provide full-range supply to meet your pipe connection operation needs. Contact us to select the appropriate specifications for your operation and ensure uninterrupted on-site productivity.
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