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Fishing and Milling Operations in Drilling: A Job Planning Guide
Field-planning guide Research reviewed August 2026 | Written for drilling supervisors, fishing engineers, wellsite teams, and technical buyers A fishing operation in drilling is a planned response to downhole equipment, tubulars, wireline components, or debris that blocks the next intended…
Overshot vs. Junk Basket: A Field Selection Guide
Quick Selection Criteria Before picking an overshot or a junk basket, define the target form: an oilfield overshot grips the outside of a defined tool through a grapple-and-bowl mechanism. By contrast, a junk basket uses circulation to transport loose debris…
Fishing Jar (Super / Hydraulic): Mechanism, Selection, and Stuck-Pipe Guide
Updated July 2026 Quick Specs to Collect Before Selection Recovery objective Free, retrieve, reposition, back off, or abandon the engaged fish Impact requirement Upward, downward, or double-acting action, tied to the suspected sticking mechanism Mechanical fit Tool outside diameter, bore,…
Casing Scraper: The Complete Field Guide
A casing scraper is a downhole tool run on drill pipe or tubing to clean scale, cement, rust, and debris from the inside of a casing string before critical well operations. Quick Specs Blade hardness (typical) 55–60 to 58–62 HRC…
The Complete Guide to Bumper Sub Types, Function & Field Operation
A bumper sub is a telescoping downhole tool run in a fishing string to deliver a controlled impact on a stuck fish while still transmitting full torque. The quick-reference specs below cover the working range across the market before the…
