bumper sub

Features:

  1. Designed and manufactured according to API spec 7-1.
  2. Tool is anti-torque and can work with motor.
  3. Tool length is short, small diameter, less wear in the downhole.
  4. The same tool can change the components and the direction of the outer cylinder to realize up or down jar.

Description

Lubricated fishing bumper sub is one of the jars which produce jarring force by means of the energy caused by heavy weight objects when moving down, its inner chamber is full of hydraulic oil so as to ensure a longer service life. The tool is suitable for deep hole and middle deep hole operation. With some advantages: Can produce strong one way down jarring force, maximum jarring force, continuous down jarring force. Medium jarring force; continuous up jar, low-grade jarring force; can release fishing tool; can act as constant pressure drill tool, simply structure, easy operation, all these make it widely used jarring tool.

Specifications:

Model BXJ31B BXJ34B BXJ36B BXJ42B BXJ46B BXJ62B BXJ64B BXJ70B BXJ80B
OD in(mm) 80 89 95 108 121 159 165 178 203
ID in(mm) 25.4 25.4 28 38 38 57 57 70 76.2
sealing pressure (MPa) 30
Max.Tensile Load(KN) 30 40 50 70 90 143 143 153 220
Work stroke in (mm) 15 1/2 15 1/2 15 1/2 15 1/2 15 3/4 18 1/8 18 1/8 18 5/16 18 5/16
394 394 394 394 400 460 460 465 465
API connection 2 3/8REG NC26 NC26 NC31 NC38 NC50 NC50 NC50 6 5/8REG

Drawing:

bumper sub (1)

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