The Rebco A Blind Box is a solid, hardened alloy steel tool with a flat, hardened face on its lower end, designed to drive obstructions, sand bridges, debris accumulations, collapsed scale, or other foreign matter downward through the tubing string to a point where they no longer interfere with wireline operations. The flat bottom concentrates the full force of every downstroke jar blow directly onto the obstruction, much like a hammer face striking a nail, making the Blind Box the most direct and efficient tool for mechanically displacing material lodged within the tubing bore.

Rebco’s Blind Box serves a second, equally important function: when a wireline becomes parted downhole, and the rope socket cannot be recovered by conventional means, the Blind Box can be used as a cutter bar. Made up below a short length of stem and dropped in free-fall, or run and jarred downward against the remaining wireline, the hardened leading edge severs the line at the rope socket, freeing the tool string below for subsequent fishing operations.

It is critical that the Blind Box OD be sized as close as practical to the tubing ID in which it will operate. A tool that is too small will not transfer full impact to a concentrated point, while a tool that exceeds tubing drift will not pass through restrictions above the work zone. Available in standard threaded connections, ⅜"–6⅝" OD. Custom sizes and large-bore tools are available on special order.

How to Order: Part Number is 10500x.xx (0 prefix for ODs less than 1.00"). All Blind Boxes are part-numbered by OD dimension to 2 decimal places ±.005". Metric parts are marked to 2 decimal places; Part Number prefix 10501