BO Hydraulic Jar (Threaded)

The Rebco BO Hydraulic Jar is an upstroke-only jar that uses a closed hydraulic fluid system to control the timing and intensity of the jarring impact. When upward tension is applied to the wireline, the mandrel assembly is pulled upward within the body. This upward movement is impeded by a piston operating within a restricted-bore cylinder filled with hydraulic fluid, which builds line tension while the jar remains closed. When the piston clears the restricted bore and enters the enlarged bore section, hydraulic resistance ceases instantly, the stretched wireline and any accelerator spring energy release simultaneously, driving the mandrel upward at rapidly increasing velocity until it strikes the body insert, delivering a high-intensity upward jarring impact. The jar is reset by slackening the wireline, allowing the weight of the stem above to push the piston back into the cylinder. The intensity of the impact is controlled by the amount of surface tension; greater tension results in a greater impact. Hydraulic jars are typically placed between the stem and the mechanical jars in the tool string, providing additional upward jarring force when conventional mechanical jarring is insufficient due to deviation, high-viscosity fluid, or deep wells. Hydraulic fluid specification can be adjusted to suit downhole temperature conditions. Available in standard threaded connections, 1¼"–2⅛" OD.

BD Hydraulic Jar (RQLD)

The Rebco BD Hydraulic Jar is the RQLD quick-lock version of the Type BO, combining the same controlled hydraulic upstroke jarring system with Rebco's double-shoulder Quick Lock System for faster field assembly. Available in RQLD connections, 1¼"2⅛" OD.

Note: RQLD stands for (Rebco Quick Lock Disconnect)