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BXJ Lubricated Fishing Bumper Sub

Product Detail

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    BXJ Lubricated Fishing Bumper Sub

    Technical Features

    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.

    Working principle

    ● Energy conversion in jarring operation

    Jarring downward is made by means of conversion. Rasing drill stem shall make bumper jar to be pull down at a certain height to produce potential energy. Go on raising drill stem, the drill stem has a strain energy due to spring strain. When drill stem is lowered suddenly, the energy stored in drill stem the force the drill stem to move downward in acceleration. When bumper sub reaches a closed position, the above energies at this instant change into a large downward jarring force.

    ● Main factors having influenced on jarring force.

    Many factors influence on jarring force. But key factors as follows:

    1. The bigger hanging weight on top drill stem of bumper jar makes a bigger jarring force.

    2. The longer the spring extension of drill stem is when raising drill stem. The bigger the jarring force is.

    3. The longer the stroke of the bumper jar is, the bigger the jarring force of jar is.

    Technical Parameters

    Parameters/Model

    BXJ31B

    BXJ34B

    BXJ36B

    BXJ42B

    BXJ44B

    BXJ46B

    BXJ62B

    BXJ64B

    BXJ70B

    BXJ80B

    Product Code

    1101000

    1102000

    1103000

    1105000

    1106000

    1108000

    1110000

    1111000

    1113000

    1115000

    O.D. (mm)

    80

    89

    95

    108

    114

    121

    159

    165

    178

    203

    I.D. (mm)

    25.4

    25.4

    28

    32

    38

    38

    57

    57

    70

    76.2

    Sealing pressure (MPa)

    30

    30

    30

    30

    30

    30

    30

    30

    30

    30

    Max .tensile load (tf)

    30

    40

    50

    70

    80

    90

    143

    143

    153

    220

    Work stroke (mm)

    394

    394

    394

    394

    394

    400

    460

    460

    465

    465

    Connection

    2 3/8REG

    NC26

    NC26

    NC31

    NC31

    NC38

    NC50

    NC50

    NC50

    6 5/8REG

    Closed length (mm)

    2355

    2400

    2514

    2450

    2450

    2446

    2730

    2730

    2950

    3108

     

Shaanxi BRJ Petroleum Machinery Equipment Co.,Ltd
Add: Room 2-1014,3rd building,Deyi international center,No.6 Changqing 2nd road,
Economic and technological development zone,Xi'an,china
Tel/Fax: 0086-29-89612241   Email: Sales@brj-oiltools.com  http://www.brj-oiltools.com