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| Categories | Downhole Tools |
|---|---|
| Place of Origin: | CHINA |
| Packaging Details: | WOODEN BOX |
| Certification: | API |
| Delivery Time: | 10-15 WORK DAYS |
| Payment Terms: | T/T,L/C |
| Supply Ability: | 10 PIECES PER MONTH |
| Company Info. |
| XIAN ATO INTERNATIONAL CO.,LTD |
| Verified Supplier |
| View Contact Details |
| Product List |
Back off sub, also known as back off spear, is a vital downhole fishing tool applied for oil & gas well fishing operations. It serves as an effective alternative to taper taps to conduct fishing and backoff operations during stuck pipe treatment.
When the downhole fish becomes jammed and cannot be backed off successfully, the string can be released at the back off sub. Operators can then trip out the upper drilling assembly safely, allowing subsequent fishing solutions to be run into the well. This tool greatly improves the flexibility of fish recovery and reduces operation risks in well fishing.
| Model | OD mm (inch) | ID mm (inch) | OAL mm (ft) | Connection |
|---|---|---|---|---|
| ZDK105 | 105 (4-1/8) | 15 (19/32) | 580 (1.9) | NC31LH Box * NC31 Pin |
| ZDK121 | 121 (4-3/4) | 22 (55/64) | 628 (2.1) | NC38LH Box * NC38 Pin |
| ZDK159 | 159 (6-1/4) | 28 (1-7/64) | 690 (2.3) | NC46LH Box * NC46 Pin |
| ZDK165 | 165 (6-1/2) | 28 (1-7/64) | 690 (2.3) | NC50LH Box * NC50 Pin |
| ZDK168 | 168 (6-5/8) | 28 (1-7/64) | 690 (2.3) | NC50LH Box * NC50 Pin |
| ZDK178 | 178 (7) | 32 (1-1/4) | 700 (2.3) | 5-1/2FH LH Box * 5-1/2FH Pin |
| ZDK203 | 203 (8) | 35 (1-3/8) | 723 (2.4) | 6-5/8REGLH Box * 6-5/8REG Pin |
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Fullopening safety valve with 235mm OD and 108mm ID for manual control in drill string blowout prevention
Quick-Operating Thread Protector for Casing with Solid and Durable Reliable Performance
SZJS Double Acting Drilling Accelerator with 650 KN Downward Push Force, 1250 KN Upward Pull Force, and 3500 KN Max Tensile Load
Arrow Type Check Valve with 104.8mm OD and 41.3mm ID for Quick Shut Down in Oil and Gas Drilling
API Standard Casing Scraper Downhole Tool with Dual Rotating and Fixed Modes Adjustable Pads for Full Range of Casing Sizes
High Performance Reverse Circulating Junk Basket - Wear Resistant Downhole Fishing Tool for Safe and Reliable Oil Well Fishing
Integral Blade Stabilizer with 79.4mm Body OD 31.8mm ID and 98mm Blade OD for Drilling Tools
Specialized Downhole Tools for Washover Pipe Applications Addressing Sticking Challenges and Supporting Well Maintenance
QYZ Hydraulic Drilling Jar with 180-650 KN Downward Jarring Force, 350-1250 KN Upward Jarring Force, and 1100-3500 KN Max Tensile Load
Long-Shaped Fishing Magnet for Oilfield Washover Operation with Low Circulation & Low Flow Performance
