The table below presents the types of fishing tools and their applications
|
Type of Fishing Job |
Type of Fishing Tool |
Names of Tools |
|
Recovery of Tubular Fish |
Connecting Tools -External Catch -Internal Catch -Accessories
Washover Tools
Force Multiplier
|
Overshot Die collar Taper tap (poor class of tool: overshot always preferable if available) Spear (provides very good connection) Bent drillpipe single Hydraulic knuckle joint Hydraulic wall hook Wall hook Washover safety joint Washover pipe Washover shoe Jar, hydraulic or mechanical |
|
Recovery of Other Fish |
Disengagement Tools
Information Tools |
Safety joint Bumper safety joint External tubing/drillpipe cutter Internal tubing/drillpipe cutter Jet cutter Chemical cutter Electric cable back-off Impression block Free Point Indicator |
|
Recovery of Non-Tubular Fish |
Milling/Spearing Circulating |
Junk basket Circulating junk basket (+coring) Reverse/circulating, globe/type basket Magnet Wireline spear Junk sub |
Fishing tools requirements
The fishing equipment that the Drilling Contractor is required to have on the drilling rig is specified in the Drilling Contract.
All equipment run in hole should have fishing equipment available at the rig site which can be mobilised without causing operational delay.
Fishing tools certifications
String and fishing component inspection requirements shall be completed before fishing commences and during protracted fishing operations. All fishing equipment shall have valid certification and inspection documentation.
Fishing tools recommendations
It is recommended that the following fishing equipment be made available at the well site:
- Overshots and oversized guides, complete with baskets grapples and mill control and MC packer or pack off to catch all sizes of tools in hole.
- Fishing bumper sub (18in stroke) matching with drill collar string in use.
- Hydraulic jar with matching accelerator for the drill collar string in use.
- Surface jar (intensive) with matching drillpipe connections.
- Coring basket.
- Junk sub with the same or larger OD as the drill collar strings.
- Lead impression blocks for the various hole sizes.
- Flat mills for all hole sizes.