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Overshots
- Our LT/S-T73A overshots extend catch surface life by 20% in abrasive mud via 48 HRC hardened steel (Kazakhstan field data)
- Our LT/S-T89B model cuts offshore saltwater corrosion by 90% with 80μm zinc-nickel coating (Malaysian offshore trials)
- Our LT/S-T60A’s wide catch range reduces size-matching errors by 25% (Texas Permian Basin fishing feedback)
Description
The Critical Role of Overshots in Fishing Operations
Overshots are the backbone of downhole fishing—but 24% of standard overshots fail to retrieve tools on the first attempt (our 2024 audit of 125 global well sites), adding 10+ hours of downtime per incident. After 22+ years supporting 400+ fishing projects (from North American shale to Middle Eastern desert wells), we’ve learned: generic overshots struggle with tight clearances, abrasive mud, and high-torque retrievals. Our LT/S-series overshots fix these gaps—built on 4,800+ hours of on-site fishing trials, not one-size-fits-all designs.
1. LT/S-Series Overshot Models: Parameters & Target Application Features
Below is our consolidated spec table (organized by type) with use cases tied to real project feedback:
Type | OD (mm) | OD (in) | Max. Catch Size (mm) | Max. Catch Size (in) | Connection | Key Application Features |
LT/S-T48A | 92 | 3 5/8 | 48.3–55 | 1 7/8–2 11/64 | NC26 | Shallow well fishing (≤2,000m); compact OD fits narrow wellbores (Southeast Asian rural well data). |
LT/S-T60A | 102 | 4 | 60.3–65.9 | 2 3/8–2 19/32 | 2 7/8 Reg. | Medium-depth fishing (2,000–3,500m); wide catch range reduces size-matching errors by 25% (Texas Permian trials). |
LT/S-T73A | 108 | 4 1/4 | 73–78 | 2 7/8–3 1/16 | 2 7/8 Reg. | Abrasive sandstone well fishing; hardened catch surface cuts wear by 20% (Kazakhstan field feedback). |
LT/S-T89A | 124 | 4 7/8 | 89–95 | 3 1/2–3 3/4 | 2 7/8 Reg. | High-torque retrievals; reinforced connection eliminates 80% of thread stripping (Libyan desert data). |
LT/S-T48B | 76 | 3 | 48.3 | 1 7/8 | 2 3/8 Reg. | Low-clearance shallow fishing; lightweight design speeds deployment by 15% (North African marginal well trials). |
LT/S-T89B | 114 | 4 7/8 | 88.9 | 3 1/2 | NC31 | Deep well fishing (3,500–5,000m); corrosion-resistant coating reduces saltwater damage by 90% (Malaysian offshore data). |
2. Common Quality Issues & Our Field-Verified Improvements
All fixes below are validated by 2023–2025 site data, with success rates audited by independent inspectors:
2.1 Small-to-Medium OD Overshots (LT/S-T48A to T73A)
Industry Pain Point | Our Improvement (Verified Data) |
Catch surface wear in abrasive mud | Hardened carbon steel catch (48 HRC); Kazakhstan data: catch service life extended by 20%. |
Size-matching errors in tight ranges | Wide catch size tolerances (e.g., T60A: 60.3–65.9mm); Permian Basin data: matching errors reduced by 25%. |
Connection thread stripping | Reinforced thread root design; Libyan desert data: stripping incidents eliminated (vs. 12% for standard overshots). |
2.2 Large OD & Corrosive-Environment Overshots (LT/S-T89A to T89B)
Industry Pain Point | Our Improvement (Verified Data) |
Housing corrosion in offshore saltwater | Zinc-nickel coating (80μm thickness); Malaysian offshore data: corrosion rate reduced by 90% over 6 months. |
Low retrieval success in high-torque runs | Enhanced grip teeth (20% sharper profile); Siberian deep well data: first-attempt success rate boosted to 92% (vs. 78% standard). |
Fatigue cracking in repeated use | 10% thicker alloy steel housing; North Sea data: cracking incidents reduced by 85%. |
3. Overshot & Spare Parts Supply
We maintain regional warehouses (Houston, Dubai, Singapore) for 2–7 day delivery, partnering with top-tier brands:
3.1 Complete Overshot Offerings
In-House LT/S-Series Overshots: Our field-optimized line (all models above) – tailored to regional conditions (desert abrasion, offshore corrosion) with a 1-year warranty.
Partner Brands: NOV Fishing Overshots (API-compliant for North American projects), Weatherford High-Torque Overshots (for ultra-deep European wells) – fully certified for strict regulatory markets.
3.2 Critical Spare Parts
Component | Trusted Brands & Models | Regional Warehouses | Delivery Time |
Catch Inserts | Custom Hardened Steel Inserts (48 HRC), NOV Grip Teeth | Houston, Dubai | 3–5 working days |
Connection Threads | Siemens Reinforced Thread Inserts, Weatherford Coated Threads | Singapore, Tianjin | 2–4 working days |
Housing Seals | Parker High-Pressure Seals, PPG Corrosion-Resistant Seals | Global Key Cities | 1–3 working days |
Industry Insight: The Future of Downhole Fishing Overshots
By 2030, 30% of fishing operations will target ultra-deep (≥6,000m) or high-corrosion (offshore) wells, so overshots must balance grip strength and durability. Our 2026 R&D pipeline focuses on:
Titanium Alloy Catch Inserts: 35% lighter than steel, tested to 7,000m in the Tarim Basin (99.5% grip retention over 4 retrievals).
Smart Grip Sensors: Real-time feedback on catch tightness via downhole telemetry – prototypes boosted first-attempt success rate by 14% in 2025 trials.
For operators, this means fewer fishing runs and 20–25% lower fishing-related costs.