MWD Fishing Head: Precision Retrieval System for Directional Drilling Tools
The Directional Tool Fishing Challenge
Conventional fishing methods risk damaging expensive MWD/LWD equipment:
⚠️ Overshots and spears potentially crushing external tool housing
⚠️ Ineffective engagement with non-standard MWD outer profiles
⚠️ Risk of damaging internal electronics during retrieval
⚠️ Extended fishing time increasing well control risks
Our MWD Fishing Head Delivers:
✅ Custom-engineered interface matching specific MWD outer diameters
✅ Protective internal stop preventing excessive compressive forces
✅ High-strength engagement without damaging tool internals
✅ Rapid deployment with standard fishing strings
Design Features & Working Principle
Directional Tool-Specific Fishing Technology
| Feature | Specification | Functional Benefit |
|---|---|---|
| Profile Interface | CNC-machined to match specific MWD OD | Secure engagement without slippage |
| Force Limitation | Internal mechanical stop | Prevents crushing of sensitive MWD assemblies |
| Circulation Paths | Integrated bypass ports | Maintains circulation during fishing operations |
| Release Mechanism | Standard left-hand rotation release | Controlled disengagement if needed |
Technical Specifications
| Parameter | Specification |
|---|---|
| Compatible Tools | All major MWD/LWD brands and models |
| Engagement Force | 10,000–50,000 lbf (adjustable) |
| Operating Pressure | Up to 15,000 PSI |
| Temperature Rating | -20°C to 150°C |
| Connection Above | Standard fishing string threads (API IF, REG) |
| Materials | 4140HM Steel, specialized heat treatment |
| Sizes Available | 3.5″ to 8.25″ OD (covers 95% of MWD tools) |
Operational Advantages
Fishing Success & Tool Protection
- 98% retrieval success rate for stuck MWD tools
- Zero reported cases of retrieved tool damage
- Maintains pressure integrity during retrieval
Operational Efficiency
- 60% faster engagement than conventional fishing tools
- Clear depth indicators for precise tool location
- Compatible with standard jarring and accelerator systems
Field Applications & Performance Data
Application Scenarios
- MWD/LWD Stuck in Hole: Primary retrieval when tools cannot be circulated out
- Parted Drill String Recovery: Fishing disconnected BHA with MWD components
- Sidewall Sticking: Retrieval from key seats or ledges
- Well Abandonment Operations: Recovery of valuable directional tools before plugging
Performance Metrics
✅ Retrieval Success: 98% first-attempt success rate
✅ Tool Protection: 100% of retrieved tools fully operational
✅ Operation Time: Average 8-hour reduction vs. conventional methods
✅ Depth Capability: Successful operations to 28,000 ft MD
