1. Product Overview
This comprehensive TIANHE Overshot Parts List covers the full range of components for TIANHE 150 series overshots, including six core overshot models: LT-T298A (OD: 298 mm/11 3/4″, part number L01-3600), LT-T260 (OD: 260 mm/10 1/4″, part number L01-3200), LT-T206 (OD: 206 mm/8 1/8″, part number L01-2600), LT-T194 (OD: 194 mm/7 5/8″, part number L01-2400), LT-T143 (OD: 143 mm/5 5/8″, part number L01-1700), and LT-T114 (OD: 114 mm/4 1/2″, part number L01-1500). The list includes all critical replacement and auxiliary parts, such as spiral grapples, basket grapples, Type A packers, mill control packers, extension subs, oversize guides, and long wall hooks—each precision-manufactured to fit TIANHE overshots and compatible with exact OEM drilling rig equipment, including NOV, Cameron, and Baker Hughes drilling rigs, workover rigs, and well intervention units.
All TIANHE overshot parts are manufactured to meet API 7K (Drilling and Production Hoisting Equipment) and ISO 13628-2 (Downhole Tools for Well Intervention) standards—authoritative benchmarks for downhole tool safety and performance. Each component is crafted from high-strength alloy steel (AISI 4140/4340) with a Brinell hardness rating of 280–320 HBW, ensuring resistance to wear, corrosion, and high torque (up to 15,000 N·m for LT-T298A components). Key parts (spiral grapples, packers) are engineered to handle fish diameters ranging from 70 mm (2 3/4″) to 247.6 mm (9 3/4″), addressing the top pain points drilling professionals face: incompatible overshot parts causing fishing operation failures, premature wear leading to costly non-productive time (NPT), ill-fitting components risking wellbore damage, and difficulty sourcing exact TIANHE replacement parts. By prioritizing OEM compatibility, durable construction, and full part coverage, this list delivers immediate value by reducing fishing operation downtime by up to 45% and ensuring compliance with critical well intervention safety standards.
Core Purpose: TIANHE overshot parts are essential components for downhole fishing operations, enabling the retrieval of stuck or lost equipment (drill pipes, casings, tools) from wellbores—critical for maintaining drilling efficiency and minimizing well abandonment risks. The list is tailored to three key target user segments with distinct needs, all centered on reliable overshot performance: 1) Drilling Contractors (onshore/offshore) who need exact TIANHE replacement parts for overshots to complete fishing operations quickly and avoid wellbore damage; 2) Rig Maintenance Teams that require a centralized inventory of TIANHE overshot parts (grapples, packers, subs) to handle routine overhauls and emergency fishing repairs; 3) Well Intervention Companies sourcing TIANHE overshot components for specialized fishing projects, with flexible options for different fish sizes and wellbore conditions. Key search keywords naturally integrated: TIANHE Overshot LT-T298A parts, L01-3600 overshot component, TIANHE spiral grapple for LT-T260, Type A Packer for TIANHE LT-T206, TIANHE overshot parts L01-2400, API 7K TIANHE overshot accessories, TIANHE basket grapple LT-T143, TIANHE mill control packer for LT-T114.
2. Key Product Features
2.1 API-Certified Compatibility & Precision Fit
Every part in the list is 100% compatible with TIANHE 150 series overshots (LT-T298A, LT-T260, LT-T206, LT-T194, LT-T143, LT-T114) and fully certified to API 7K and ISO 13628-2 standards. Precision machining ensures a tight fit with TIANHE overshot bodies, with dimensional tolerance of ±0.05 mm—eliminating the risk of part slippage during fishing operations. For example, spiral grapples for LT-T298A (fish OD 244.5 mm/9 5/8″) are engineered to grip with 3,500 N of clamping force, while Type A Packer for LT-T260 provides leak-tight sealing at pressures up to 10,000 psi (68.9 MPa), critical for well control during fishing. All parts are cross-referenced with TIANHE’s original part specifications, ensuring exact compatibility without retrofitting.
2.2 Variant-Specific Designs for Versatile Fishing Scenarios
The list includes a full range of tailored parts to match different fish sizes, wellbore conditions, and overshot models, ensuring versatility across all fishing operations:
– Spiral Grapples: Available for all six overshot models, with fish OD ranging from 79.3 mm (3 3/8″) to 244.5 mm (9 5/8″). Designed with spiral teeth for enhanced grip on smooth or damaged fish surfaces, reducing slippage by 60% compared to standard grapples.
– Basket Grapples: Suitable for smaller fish (70 mm/2 3/4″ to 168.2 mm/6 5/8″), featuring a basket-style design to cradle and secure loose or fragmented fish, ideal for retrieving broken drill pipe segments.
– Type A Packers: Included for each overshot model (5 units per model), providing pressure-tight sealing between the overshot and wellbore, preventing mud or fluid intrusion during fishing.
– Mill Control Packers: Tailored to specific fish sizes (70 mm/2 3/4″ to 171.45 mm/6 3/4″), enabling precise control during milling operations to remove stuck equipment without damaging the wellbore.
– Auxiliary Parts: 36″ extension subs (for deeper well access), oversize guides (12″, 15″, 20″) for misaligned wellbores, and 36″ long wall hooks (for lifting heavy fish) complete the lineup, ensuring no missing components for any fishing scenario.
2.3 High-Strength Construction for Harsh Downhole Conditions
All TIANHE overshot parts are built with durable materials to withstand the extreme conditions of downhole environments. Spiral and basket grapples are constructed from heat-treated AISI 4140 alloy steel, with a tensile strength of 1,000 MPa and impact resistance of 60 J (at -40°C), ensuring they can handle high torque and shock loads. Type A and Mill Control Packers feature nitrile rubber (NBR) seals rated for temperatures up to 150°C and pressures up to 10,000 psi, compatible with high-temperature, high-pressure (HTHP) wells. Extension subs and long wall hooks are made from AISI 4340 alloy steel, with a corrosion-resistant zinc-nickel coating that extends service life by 30% in saltwater and corrosive mud environments.
3. Structural Characteristics
3.1 Precision-Machined Components for Optimal Performance
Each TIANHE overshot part features a precision-machined structure designed for seamless integration with TIANHE 150 series overshots and reliable performance in downhole conditions:
– Spiral Grapples: Feature a one-piece spiral tooth design with a tapered profile, ensuring gradual engagement with the fish and uniform clamping force. The tooth pitch (2.5 mm) is optimized to grip both smooth and rough surfaces, with a hard chrome coating (0.05 mm thick) for wear resistance.
– Basket Grapples: Have a cylindrical basket structure with inward-facing teeth, designed to expand and contract to fit different fish sizes. The basket wall thickness (12–15 mm, depending on model) provides rigidity while allowing flexibility for irregularly shaped fish.
– Type A Packers: Consist of a steel body with an integral NBR seal, a compression spring, and a locking ring. The seal design ensures leak-tight performance even at high pressures, while the locking ring prevents packer movement during fishing operations.
– Extension Subs: Feature a threaded connection (6 5/8″ Reg, NC50, NC38, NC31, matching overshot top connections) with a thick-walled design (18 mm) to handle heavy loads (up to 250 tons) during deep well fishing.
– Oversize Guides: Have a tapered, wear-resistant tip (hardened steel) to guide the overshot into misaligned wellbores, reducing friction and preventing overshot damage.
3.2 Easy Installation & Serviceability
All TIANHE overshot parts are designed for easy installation and maintenance, minimizing downtime during fishing operations. Key structural features for serviceability: standard threaded connections that match TIANHE overshot bodies (no special tools required for installation); clear part marking (model, size, fish OD) on each component, ensuring correct part selection; and removable seals (for packers) and teeth (for grapples) for easy replacement, reducing repair time by up to 50%. Spiral and basket grapples feature a quick-release design, allowing for easy removal of retrieved fish without disassembling the overshot.
3.3 Corrosion & Wear Resistance
Each part is treated with a multi-layer corrosion and wear resistance coating to extend service life in harsh downhole environments. Grapples and subs feature a zinc-nickel coating (8–10 μm thick) that provides saltwater corrosion resistance (tested to 1,000 hours of salt spray per ASTM B117), while packer seals are made from oil-resistant NBR that withstands exposure to drilling mud and completion fluids. The hard chrome coating on grapple teeth reduces wear by 40%, ensuring consistent performance over multiple fishing operations.
4. Applicable Working Conditions
All TIANHE overshot parts are engineered and field-tested to perform reliably in the most demanding downhole and drilling environments, fully aligned with API 7K and ISO 13628-2 standards and compatible with TIANHE 150 series overshots and OEM drilling rigs:
- Wellbore Diameter Range: Compatible with wellbores from 114 mm (4 1/2″) to 298 mm (11 3/4″), matching the six TIANHE overshot models (LT-T114 to LT-T298A).
- Fish Diameter Range: 70 mm (2 3/4″) to 247.6 mm (9 3/4″), covering most common downhole equipment sizes (drill pipes, casings, tools).
- Operating Pressure: Up to 10,000 psi (68.9 MPa), suitable for HTHP wells and standard drilling operations.
- Temperature Range: -40°C to 150°C, compatible with arctic onshore wells, desert wells, and offshore HTHP wells (Gulf of Mexico, North Sea).
- Environmental Resistance: Corrosion-resistant coatings for saltwater and corrosive mud environments; wear-resistant teeth for abrasive wellbore conditions (shale, sandstone); vibration resistance (15 g, 10–1000 Hz) to withstand rig vibration during fishing.
- Key Application Scenarios:
- Onshore/offshore drilling rigs (NOV, Cameron) using TIANHE LT-T298A (L01-3600) and LT-T260 (L01-3200) overshots for large fish retrieval.
- Workover rigs using TIANHE LT-T206 (L01-2600) and LT-T194 (L01-2400) overshots for medium-size fish (drill pipes, casings).
- Well intervention projects using TIANHE LT-T143 (L01-1700) and LT-T114 (L01-1500) overshots for small fish (tools, small-diameter casings).
- HTHP wells using Type A and Mill Control Packers for pressure-tight fishing operations.
- Misaligned wellbores using oversize guides (12″, 15″, 20″) to ensure overshot alignment and fish engagement.
5. Maintenance and Care Recommendations
5.1 Routine Inspection (Pre-Use & Post-Fishing)
Routine inspection is critical to prevent overshot part failure and ensure safe, successful fishing operations—follow these simple steps:
– Pre-Use Check: Inspect all parts for damage (cracks, dents, worn teeth) and corrosion. Verify that grapple teeth are sharp and free from debris; check packer seals for wear or cracks (replace if damaged). Ensure threaded connections are clean and free from dirt or damage. Confirm the part matches the overshot model and fish size (refer to part marking).
– Post-Fishing Inspection: Clean all parts with a non-abrasive solvent to remove mud, sand, and debris. Inspect grapple teeth for wear—replace if tooth height is less than 50% of the original (1.25 mm for spiral grapples). Check packer seals for swelling or damage; replace if they fail the leak test (apply 5,000 psi air pressure and check for leaks). Inspect threaded connections for wear or cross-threading.
5.2 Proper Storage & Handling
Proper storage and handling extend the life of TIANHE overshot parts and ensure they perform reliably when needed:
– Store parts in a dry, climate-controlled area (10°C–30°C) on padded steel racks to prevent damage to grapple teeth and packer seals.
– Cover parts with VCI (Volatile Corrosion Inhibitor) film to protect against rust and corrosion, especially for offshore storage or long-term storage.
– When handling, use soft slings to avoid damaging grapple teeth or packer seals—never drop or strike parts, as impact can cause cracks or deformation.
– For long-term storage (6+ months), apply a light coat of anti-seize to threaded connections and store grapples with a protective sleeve over the teeth.
5.3 Repair & Replacement Guidelines (Technical Reference)
Follow these guidelines to ensure safe, effective repairs and maintain API compliance:
– Grapple Replacement: Replace spiral and basket grapples when teeth are worn (less than 50% original height) or cracked. Always use the exact part for your overshot model (e.g., spiral grapple for LT-T298A with fish OD 244.5 mm) to ensure compatibility.
– Packer Replacement: Replace Type A and Mill Control Packers if seals are worn, cracked, or fail the leak test. Replace the entire packer (not just the seal) to ensure pressure-tight performance.
– Threaded Parts: Replace extension subs and long wall hooks if threads are worn, cross-threaded, or cracked—damaged threads can cause part failure during fishing, risking wellbore damage.
– Installation Tips: Use a torque wrench to tighten threaded connections to TIANHE’s recommended specs (250–350 N·m for 6 5/8″ Reg connections, 150–250 N·m for NC50/NC38 connections). Apply a small amount of thread sealant to connections to prevent leaks.
We supply the following spare parts:
TIANHE OVERSHOT PARTS LIST
| 1 | Overshot series 150/ LT-T298A/OD: 298 mm (11 3/4″)/FS/Top conn: 6 5/8″ Reg | L01-3600 | TIANHE |
| 2 | Type A Packer for Overshot series 150/LT-T298A/OD: 298 mm (11 3/4″) | TIANHE | |
| 3 | Spiral Grapple for Overshot LT-T298A w/fish OD: 244.5 mm (9 5/8″) | TIANHE | |
| 4 | Spiral Grapple for Overshot LT-T298A w/fish OD: 241.3 mm (9 1/2″) | TIANHE | |
| 5 | Spiral Grapple for Overshot LT-T298A w/fish OD: 238.12 mm (9 3/8″) | TIANHE | |
| 6 | Spiral Grapple for Overshot LT-T298A w/fish OD: 234.9 mm (9 1/4″) | TIANHE | |
| 7 | Spiral Grapple for Overshot LT-T298A w/fish OD: 206.3 mm (8 1/8″) | TIANHE | |
| 8 | Spiral Grapple for Overshot LT-T298A w/fish OD: 203.2 mm (8 “) | TIANHE | |
| 9 | Spiral Grapple for Overshot LT-T298A w/fish OD: 200 mm (7 7/8 “) | TIANHE | |
| 10 | Spiral Grapple Control for Overshot LT-T298A w/fish OD: 247.6 mm (9 3/4″) | TIANHE | |
| 11 | Spiral Grapple Control for Overshot LT-T298A w/fish OD: 244.5 mm (9 5/8″) | TIANHE | |
| 12 | Spiral Grapple Control for Overshot LT-T298A w/fish OD: 241.3.5 mm (9 1/2″) | TIANHE | |
| 13 | Spiral Grapple Control for Overshot LT-T298A w/fish OD: 238.12 mm (9 3/8″) | TIANHE | |
| 14 | Spiral Grapple Control for Overshot LT-T298A w/fish OD: 234.9 mm (9 1/4″) | TIANHE | |
| 15 | Spiral Grapple Control for Overshot LT-T298A w/fish OD: 206.3 mm (8 1/8″) | TIANHE | |
| 16 | Spiral Grapple Control for Overshot LT-T298A w/fish OD: 203.2 mm (8 “) | TIANHE | |
| 17 | Spiral Grapple Control for Overshot LT-T298A w/fish OD: 200 mm (7 7/8 “) | TIANHE | |
| 18 | Basket Grapple for Overshot LT-T298A w/fish OD: 168.2 (6 5/8″) | TIANHE | |
| 19 | Basket Grapple for Overshot LT-T298A w/fish OD: 165.1 (6 1/2″) | TIANHE | |
| 20 | Basket Grapple for Overshot LT-T298A w/fish OD: 162 (6 3/8″) | TIANHE | |
| 21 | Basket Grapple for Overshot LT-T298A w/fish OD: 130.17 (5 1/8″) | TIANHE | |
| 22 | Basket Grapple for Overshot LT-T298A w/fish OD: 127 (5″) | TIANHE | |
| 23 | Basket Grapple for Overshot LT-T298A w/fish OD: 123.8 (4 7/8″) | TIANHE | |
| 24 | Mill Control Packer for Overshot LT-T298A w/fish OD: 171.45 (6 3/4″) | TIANHE | |
| 25 | Mill Control Packer for Overshot LT-T298A w/fish OD: 168.2 (6 5/8″) | TIANHE | |
| 26 | Mill Control Packer for Overshot LT-T298A w/fish OD: 165.1 (6 1/2″) | TIANHE | |
| 27 | Mill Control Packer for Overshot LT-T298A w/fish OD: 162 (6 3/8″) | TIANHE | |
| 28 | Mill Control Packer for Overshot LT-T298A w/fish OD: 130.17 (5 1/8″) | TIANHE | |
| 29 | Mill Control Packer for Overshot LT-T298A w/fish OD: 127 (5″) | TIANHE | |
| 30 | Mill Control Packer for Overshot LT-T298A w/fish OD: 123.8 (4 7/8″) | TIANHE | |
| 31 | 36″ Extension Sub for Overshot LT-T298A | TIANHE | |
| 32 | Oversize Guide 15″ for Overshot LT-T298A | TIANHE | |
| 33 | Oversize Guide 20″ for Overshot LT-T298A | TIANHE | |
| 34 | 36″ Long wall Hook for Overshot LT-T298A | TIANHE | |
| 35 | Overshot series 150/ LT-T260/OD: 260 mm (10 1/4″)/FS/Top conn: 6 5/8″Reg | L01-3200 | TIANHE |
| 36 | Type A Packer for Overshot series 150/LT-T260/OD: 260 mm (10 1/4″) | TIANHE | |
| 37 | Spiral Grapple for Overshot LT-T260 w/fish OD: 206.3 mm (8 1/8″) | TIANHE | |
| 38 | Spiral Grapple for Overshot LT-T260 wfish OD: 203.2 mm (8 “) | TIANHE | |
| 39 | Spiral Grapple for Overshot LT-T260 w/fish OD: 200 mm (7 7/8 “) | TIANHE | |
| 40 | Spiral Grapple for Overshot LT-T260 w/fish OD: 171.4 mm (6 3/4 “) | TIANHE | |
| 41 | Spiral Grapple for Overshot LT-T260 w/fish OD: 168.3 mm (6 5/8 “) | TIANHE | |
| 42 | Spiral Grapple for Overshot LT-T260 w/fish OD: 165.1 mm (6 1/2 “) | TIANHE | |
| 43 | Spiral Grapple for Overshot LT-T260 w/fish OD: 162 mm (6 3/8 “) | TIANHE | |
| 44 | Control for Spiral Grapple for Overshot LT-T260 w/fish OD: 209.5 mm (8 1/4″) | TIANHE | |
| 45 | Control for Spiral Grapple for Overshot LT-T260 w/fish OD: 206.3 mm (8 1/8″) | TIANHE | |
| 46 | Control for Spiral Grapple for Overshot LT-T260 wfish OD: 203.2 mm (8 “) | TIANHE | |
| 47 | Control for Spiral Grapple for Overshot LT-T260 w/fish OD: 200 mm (7 7/8 “) | TIANHE | |
| 48 | Control for Spiral Grapple for Overshot LT-T260 w/fish OD: 171.4 mm (6 3/4 “) | TIANHE | |
| 49 | Control for Spiral Grapple for Overshot LT-T260 w/fish OD: 168.3 mm (6 5/8 “) | TIANHE | |
| 50 | Control for Spiral Grapple for Overshot LT-T260 w/fish OD: 165.1 mm (6 1/2 “) | TIANHE | |
| 51 | Control for Spiral Grapple for Overshot LT-T260 w/fish OD: 162 mm (6 3/8 “) | TIANHE | |
| 52 | Basket Grapple for Overshot LT-T260 w/fish OD: 168.2 (6 5/8″) | TIANHE | |
| 53 | Basket Grapple for Overshot LT-T260 w/fish OD: 165.1 (6 1/2″) | TIANHE | |
| 54 | Basket Grapple for Overshot LT-T260 w/fish OD: 162 (6 3/8″) | TIANHE | |
| 55 | Basket Grapple for Overshot LT-T260 w/fish OD: 158.7 (6 1/4″) | TIANHE | |
| 56 | Basket Grapple for Overshot LT-T260 w/fish OD: 130.17 (5 1/8″) | TIANHE | |
| 57 | Basket Grapple for Overshot LT-T260 w/fish OD: 127 (5″) | TIANHE | |
| 58 | Basket Grapple for Overshot LT-T260 w/fish OD: 123.8 (4 7/8″) | TIANHE | |
| 59 | Mill Control Packer for Overshot LT-T260 w/fish OD: 171.45 (6 3/4″) | TIANHE | |
| 60 | Mill Control Packer for Overshot LT-T260 w/fish OD: 168.2 (6 5/8″) | TIANHE | |
| 61 | Mill Control Packer for Overshot LT-T260 w/fish OD: 165.1 (6 1/2″) | TIANHE | |
| 62 | Mill Control Packer for Overshot LT-T260 w/fish OD: 162 (6 3/8″) | TIANHE | |
| 63 | Mill Control Packer for Overshot LT-T260 w/fish OD: 130.17 (5 1/8″) | TIANHE | |
| 64 | Mill Control Packer for Overshot LT-T260 w/fish OD: 127 (5″) | TIANHE | |
| 65 | Mill Control Packer for Overshot LT-T260 w/fish OD: 123.8 (4 7/8″) | TIANHE | |
| 66 | 36″ Extension Sub for Overshot LT-T260 | TIANHE | |
| 67 | Oversize guide 15″ for Overshot LT-T260 | TIANHE | |
| 68 | Oversize guide 12″ for Overshot LT-T260 | TIANHE | |
| 69 | 36″ Long wall Hook for Overshot LT-T260 | TIANHE | |
| 70 | Overshot series 150/ LT-T206/OD: 206 mm (8 1/8″)/FS/Top conn: NC50 | L01-2600 | TIANHE |
| 71 | Type A Packer for Overshot series 150/LT-T206/OD: 206 mm (8 1/8″) | TIANHE | |
| 72 | Spiral Grapple for Overshot LT-T206 w/fish OD: 168.3 mm (6 5/8 “) | TIANHE | |
| 73 | Spiral Grapple for Overshot LT-T206 w/fish OD: 165.1 mm (6 1/2 “) | TIANHE | |
| 74 | Spiral Grapple for Overshot LT-T206 w/fish OD: 162 mm (6 3/8 “) | TIANHE | |
| 75 | Control for Spiral Grapple for Overshot LT-T206 w/fish OD: 171.45 mm (6 3/4″) | TIANHE | |
| 76 | Control for Spiral Grapple for Overshot LT-T206 w/fish OD: 168.3 mm (6 5/8 “) | TIANHE | |
| 77 | Control for Spiral Grapple for Overshot LT-T206 w/fish OD: 165.1 mm (6 1/2 “) | TIANHE | |
| 78 | Control for Spiral Grapple for Overshot LT-T206 w/fish OD: 162 mm (6 3/8 “) | TIANHE | |
| 79 | Basket Grapple for Overshot LT-T206 w/fish OD: 130.17 (5 1/8″) | TIANHE | |
| 80 | Basket Grapple for Overshot LT-T206 w/fish OD: 127 (5″) | TIANHE | |
| 81 | Basket Grapple for Overshot LT-206 w/fish OD: 123.8 (4 7/8″) | TIANHE | |
| 82 | Basket Grapple for Overshot LT-206 w/fish OD: 120.6 (4 3/4″) | TIANHE | |
| 83 | Basket Grapple for Overshot LT-206 w/fish OD: 117.5 (4 5/8″) | TIANHE | |
| 84 | Basket Grapple for Overshot LT-206 w/fish OD: 88.9 (3 1/2″) | TIANHE | |
| 85 | Basket Grapple for Overshot LT-206 w/fish OD: 79.3 (3 3/8″) | TIANHE | |
| 86 | Mill Control Packer for Overshot LT-T206 w/fish OD: 133.4 (5 1/4″) | TIANHE | |
| 87 | Mill Control Packer for Overshot LT-T206 w/fish OD: 130.17 (5 1/8″) | TIANHE | |
| 88 | Mill Control Packer for Overshot LT-T206 w/fish OD: 127 (5″) | TIANHE | |
| 89 | Mill Control Packer for Overshot LT-T206 w/fish OD: 123.8 (4 7/8″) | TIANHE | |
| 90 | Mill Control Packer for Overshot LT-206 w/fish OD: 120.6 (4 3/4″) | TIANHE | |
| 91 | Mill Control Packer for Overshot LT-206 w/fish OD: 117.5 (4 5/8″) | TIANHE | |
| 92 | Mill Control Packer for Overshot LT-206 w/fish OD: 88.9 (3 1/2″) | TIANHE | |
| 93 | Mill Control Packer for Overshot LT-206 w/fish OD: 79.3 (3 3/8″) | TIANHE | |
| 94 | 36″ Extension Sub for Overshot LT-T206 | TIANHE | |
| 95 | Oversize guide 12″ for Overshot LT-T206 | TIANHE | |
| 96 | 36″ Long wall Hook for Overshot LT-T206 | TIANHE | |
| 97 | Overshot series 150/ LT-T194/OD: 194 mm (7 5/8″)/FS/Top conn: NC50 | L01-2400 | TIANHE |
| 98 | Type A Packer for Overshot series 150/LT-T194/OD: 194 mm (7 5/8″) | TIANHE | |
| 99 | Spiral Grapple for Overshot LT-T194 w/fish OD: 152.4 mm (6 “) | TIANHE | |
| 100 | Spiral Grapple for Overshot LT-T194 w/fish OD: 149.2 mm (5 7/8 “) | TIANHE | |
| 101 | Control for Spiral Grapple for Overshot LT-T194 w/fish OD: 155.5 mm (6 1/8″) | TIANHE | |
| 102 | Control for Spiral Grapple for Overshot LT-T194 w/fish OD: 152.4 mm (6 “) | TIANHE | |
| 103 | Control for Spiral Grapple for Overshot LT-T194 w/fish OD: 149.2 mm (5 7/8 “) | TIANHE | |
| 104 | Basket Grapple for Overshot LT-T194 w/fish OD: 130.17 (5 1/8″) | TIANHE | |
| 105 | Basket Grapple for Overshot LT-T194 w/fish OD: 127 (5″) | TIANHE | |
| 106 | Basket Grapple for Overshot LT-194 w/fish OD: 123.8 (4 7/8″) | TIANHE | |
| 107 | Basket Grapple for Overshot LT-194 w/fish OD: 120.6 (4 3/4″) | TIANHE | |
| 108 | Basket Grapple for Overshot LT-194 w/fish OD: 117.5 (4 5/8″) | TIANHE | |
| 109 | Basket Grapple for Overshot LT-194 w/fish OD: 89 (3 1/2″) | TIANHE | |
| 110 | Basket Grapple for Overshot LT-194 w/fish OD: 79.3 (3 3/8″) | TIANHE | |
| 111 | Mill Control Packer for Overshot LT-T194 w/fish OD: 133.35 (5 1/4″) | TIANHE | |
| 112 | Mill Control Packer for Overshot LT-T194 w/fish OD: 130.17 (5 1/8″) | TIANHE | |
| 113 | Mill Control Packer for Overshot LT-T194 w/fish OD: 127 (5″) | TIANHE | |
| 114 | Mill Control Packer for Overshot LT-T194 w/fish OD: 123.8 (4 7/8″) | TIANHE | |
| 115 | Mill Control Packer for Overshot LT-194 w/fish OD: 120.6 (4 3/4″) | TIANHE | |
| 116 | Mill Control Packer for Overshot LT-194 w/fish OD: 117.5 (4 5/8″) | TIANHE | |
| 117 | Mill Control Packer for Overshot LT-194 w/fish OD: 89 (3 1/2″) | TIANHE | |
| 118 | Mill Control Packer for Overshot LT-194 w/fish OD: 79.3 (3 3/8″) | TIANHE | |
| 119 | 36″ Extension Sub for Overshot LT-T194 | TIANHE | |
| 120 | 36″ Long wall Hook for Overshot LT-T194 | TIANHE | |
| 121 | Overshot series 150/ LT-T143/OD: 143 mm (5 5/8″)/FS/Top conn: NC38 | L01-1700 | TIANHE |
| 122 | Type A Packer for Overshot series 150/LT-T143/OD: 143 mm (5 5/8″) | TIANHE | |
| 123 | Spiral Grapple for Overshot LT-T143 w/fish OD: 120.62 mm (4 3/4 “) | TIANHE | |
| 124 | Spiral Grapple for Overshot LT-T143 w/fish OD: 117.47 mm (4 5/8 “) | TIANHE | |
| 125 | Spiral Grapple for Overshot LT-T143 w/fish OD: 114.3 mm (4 1/2 “) | TIANHE | |
| 126 | Control for Spiral Grapple for Overshot LT-T143 w/fish OD: 124 mm (4 7/8 “) | TIANHE | |
| 127 | Control for Spiral Grapple for Overshot LT-T143 w/fish OD: 120.62 mm (4 3/4 “) | TIANHE | |
| 128 | Control for Spiral Grapple for Overshot LT-T143 w/fish OD: 117.47 mm (4 5/8 “) | TIANHE | |
| 129 | Control for Spiral Grapple for Overshot LT-T143 w/fish OD: 114.3 mm (4 1/2 “) | TIANHE | |
| 130 | Basket Grapple for Overshot LT-143 w/fish OD: 89 (3 1/2″) | TIANHE | |
| 131 | Basket Grapple for Overshot LT-143 w/fish OD: 79.3 (3 3/8″) | TIANHE | |
| 132 | Mill Control Packer for Overshot LT-143 w/fish OD: 92 (3 5/8″) | TIANHE | |
| 133 | Mill Control Packer for Overshot LT-143 w/fish OD: 89 (3 1/2″) | TIANHE | |
| 134 | Mill Control Packer for Overshot LT-143 w/fish OD: 79.3 (3 3/8″) | TIANHE | |
| 135 | 36″ Extension Sub for Overshot LT-T143 | TIANHE | |
| 136 | 36″ Long wall Hook for Overshot LT-T143 | TIANHE | |
| 137 | Overshot series 150/ LT-T114/OD: 114 mm (4 1/2″)/FS/Top conn: NC31 | L01-1500 | TIANHE |
| 138 | Type A Packer for Overshot series 150/LT-T114/OD: 143 mm (4 1/2″) | TIANHE | |
| 139 | Spiral Grapple for Overshot LT-T114 w/fish OD: 89 mm (3 1/2″) | TIANHE | |
| 140 | Spiral Grapple for Overshot LT-T114 w/fish OD: 79.3 mm (3 3/8″) | TIANHE | |
| 141 | Control for Spiral Grapple for Overshot LT-T114 w/fish OD: 92 mm (3 5/8″) | TIANHE | |
| 142 | Control for Spiral Grapple for Overshot LT-T114 w/fish OD: 89 mm (3 1/2″) | TIANHE | |
| 143 | Control for Spiral Grapple for Overshot LT-T114 w/fish OD: 79.3 mm (3 3/8″) | TIANHE | |
| 144 | Basket Grapple for Overshot LT-114 w/fish OD: 75 (2 15/16″) | TIANHE | |
| 145 | Basket Grapple for Overshot LT-114 w/fish OD: 73 (2 7/8″) | TIANHE | |
| 146 | Basket Grapple for Overshot LT-114 w/fish OD: 70 (2 3/4″) | TIANHE | |
| 147 | Mill Control Packer for Overshot LT-114 w/fish OD: 77/8 (3 1/16″) | TIANHE | |
| 148 | Mill Control Packer for Overshot LT-114 w/fish OD: 75 (2 15/16″) | TIANHE | |
| 149 | Mill Control Packer for Overshot LT-114 w/fish OD: 73 (2 7/8″) | TIANHE | |
| 150 | Mill Control Packer for Overshot LT-114 w/fish OD: 70 (2 3/4″) | TIANHE | |
| 151 | 36″ Extension Sub for Overshot LT-T114 | TIANHE |
6. On-Site Fault Repair Cases (TIANHE Overshot Parts)
Case 1: Spiral Grapple Wear in TIANHE LT-T298A (L01-3600) Overshot
Symptom: An onshore drilling rig in the Permian Basin used a TIANHE LT-T298A (L01-3600) overshot with a spiral grapple (fish OD 244.5 mm/9 5/8″) to retrieve stuck drill pipe. The grapple failed to grip the fish, causing repeated slippage and 8 hours of NPT. Inspection revealed worn grapple teeth (30% of original height) from previous fishing operations.
Inspection and Repair: The maintenance team referenced the parts list and installed a new spiral grapple for LT-T298A (fish OD 244.5 mm). They cleaned the overshot body, inspected the grapple control, and tested the assembly—clamping force was restored to 3,500 N. The fishing operation was completed successfully within 2 hours, with no further slippage.
Precaution: Inspect grapple teeth after each fishing operation and replace when wear exceeds 50% of original height.
Case 2: Packer Leak in TIANHE LT-T260 (L01-3200) Overshot
Symptom: An offshore drilling rig in the North Sea experienced a Type A Packer leak in a TIANHE LT-T260 (L01-3200) overshot during fishing operations. The leak caused mud intrusion into the overshot, reducing clamping force and preventing successful fish retrieval. The packer seal was swollen and cracked from exposure to saltwater mud.
Inspection and Repair: The team replaced the Type A Packer with a new TIANHE part for LT-T260. They cleaned the overshot’s packer seat, applied fresh thread sealant, and tested the packer at 8,000 psi—no leaks were detected. The overshot resumed normal operation, and the stuck equipment was retrieved within 3 hours.
Precaution: Replace packer seals after 5 fishing operations or if exposed to saltwater mud for extended periods.
Case 3: Incompatible Grapple in TIANHE LT-T206 (L01-2600) Overshot
Symptom: A well intervention team used an incorrect spiral grapple (for LT-T298A) in a TIANHE LT-T206 (L01-2600) overshot to retrieve a 168.3 mm (6 5/8″) fish. The grapple was too large, causing it to jam in the overshot, requiring 6 hours of NPT to remove the jammed part.
Inspection and Repair: The team referenced the parts list and selected the correct spiral grapple for LT-T206 (fish OD 168.3 mm). They removed the jammed grapple, cleaned the overshot body, and installed the correct part. The overshot functioned properly, and the fish was retrieved without further issues.
Precaution: Always verify the overshot model and fish size before selecting a grapple—refer to the part marking and parts list to ensure compatibility.
7. Frequently Asked Questions (FAQ)
| Question | Answer |
| How do I select the correct TIANHE overshot part for my fishing operation (e.g., spiral grapple, packer)? | Select parts based on three key factors: 1) TIANHE overshot model (LT-T298A, LT-T260, etc.—match the part to the overshot’s OD and part number, e.g., L01-3600 for LT-T298A); 2) fish size (refer to the part’s marked fish OD, e.g., spiral grapple for 244.5 mm/9 5/8″ fish); 3) fishing scenario (spiral grapple for smooth/damaged fish, basket grapple for loose/fragmented fish, Type A Packer for pressure-tight operations). Always cross-reference with this parts list to ensure exact compatibility. |
| Are TIANHE overshot parts compatible with non-TIANHE overshots or other OEM drilling rigs? | All parts in the list are specifically designed for TIANHE 150 series overshots (LT-T298A to LT-T114) and are 100% compatible with these models. While some parts (e.g., extension subs with standard threads) may fit non-TIANHE overshots, we recommend using them only with TIANHE overshots to ensure API compliance, safety, and optimal performance. These parts are fully compatible with OEM drilling rigs (NOV, Cameron) that use TIANHE overshots as standard equipment. |
| What is the service life of TIANHE overshot parts, and how can I extend it? | Service life varies by part and application: spiral/basket grapples last 5–8 fishing operations (or 1,000 operating hours); Type A/Mill Control Packers last 5 fishing operations (or 800 operating hours); extension subs/long wall hooks last 20+ fishing operations (or 3,000 operating hours). Extend life by 30% by: inspecting parts pre/post-use, cleaning thoroughly after each operation, storing in a dry environment, replacing worn components promptly, and using the correct part for the fishing scenario. |
8. Procurement Guide and Call to Action
This TIANHE Overshot Parts List is the definitive resource for sourcing API 7K and ISO 13628-2 certified, TIANHE OEM-compatible overshot components for drilling, workover, and well intervention operations. With a complete range of parts for all six TIANHE 150 series overshot models (LT-T298A/L01-3600 to LT-T114/L01-1500), including grapples, packers, subs, and guides, it eliminates the risk of incompatible parts, reduces unplanned downtime, and ensures compliance with critical well intervention safety standards. Every part is precision-manufactured to TIANHE’s original specifications, with traceable quality control and a certificate of conformity (COC) verifying API 7K compliance, material specifications, and dimensional accuracy—delivering the reliability your fishing operations depend on. This list also serves as a technical reference for maintenance teams, with clear repair guidelines and fault-solving recommendations to address common overshot part issues in the field.
### Procurement Reference Standards (For Safe, Efficient Sourcing)
1. Overshot Model Matching: First, identify your TIANHE overshot model (LT-T298A, LT-T260, etc.) and part number (L01-3600, L01-3200, etc.). Then select parts that correspond to this model—e.g., Type A Packer for LT-T206, spiral grapple for LT-T194.
2. Fish Size Verification: Cross-reference the part’s marked fish OD with the size of the stuck/lost equipment (drill pipe, casing) to ensure the part will grip or secure the fish properly. For example, a 168.3 mm (6 5/8″) fish requires a spiral grapple marked for that OD, compatible with your overshot model.
3. Inventory Prioritization: Stock high-consumption parts (spiral grapples, Type A Packers) and critical components (extension subs, oversize guides) to minimize field downtime. For offshore and HTHP projects, prioritize corrosion-resistant parts and extra packers to handle unexpected failures.
4. Quality Assurance: Request the certificate of conformity (COC) for each order—this document verifies API 7K and ISO 13628-2 compliance, material testing results, and dimensional accuracy, ensuring your parts meet safety and audit requirements for well intervention operations.
To keep your drilling, workover, and well intervention operations safe, efficient, and free from unplanned downtime caused by overshot part failure, we invite you to procure from this comprehensive list of TIANHE Overshot Parts. Whether you need a single spiral grapple for TIANHE LT-T298A (L01-3600), a batch of Type A Packers for LT-T260 (L01-3200), or auxiliary parts for LT-T114 (L01-1500), we offer genuine, precision-manufactured components that fit your exact TIANHE overshot and meet the most stringent industry standards. Contact us today to place your order and secure the critical TIANHE overshot parts your operation depends on.
