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Hydraulic Shock Absorber YJ

Product Detail

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    Hydraulic Shock Absorber YJ

    Technical Features

    Model “YJ” Hydraulic Shock Sub should be mounted on the drilling string near the bit, absorbing or reducing axial vibration and thrust load of the drilling string. And it has a good results for prolonging the service life of the bit and protecting the drilling tools and the surface equipment.

    Working principle

    The hydraulic shock absorber is connected between drill bit and drill collar, the torque is transferred from top drill string to mandrel. The spline transfers torque to spline outer barrel, oil cylinder and lower sub , then drive drill bit to rotate.

    The bit weight is from the which of top drill tool so that drill bit insert drill into formation to break rock into pieces. The drilling mud is fed through bore of drill pipe and drill collar into mandrel of shock absorber, tailpipe, lower sub bore and ejected into bottom well .Because of the uneven bottom well conditions and special structure of cone bit, the drill bit and drill string during drilling operation would produce severe vibration. The hydraulic shock absorber, by means of compressible deformation of compressed liquid under the function of pressure, absorb the energy from drill bit and drill string vibration. Thus, the shock absorber can reduce the vibration and impact load of drill tools.

     

     

     

     

     

     

     

     

     

     

     

     

     

     

    Technical parameters

    Model

     

    O.D

    mm/in

    I.D

    mm/in

    Connection

    API

    Max.Working

    load kN/lbf

    Yield Pull

    kN/lbf

    Max.Working

    Torque

    kN·m/lbf·ft

    Yield Torque

    kN·m/lbf·ft

    Max.Working pressure kN/lbf

    Working

    Stroke mm/in

    Overall

    Length

    Mm/in

    YJ95

    96

    3-3/4

    38

    1-1/2

    NC26

    400

    90000

    530

    120000

    8

    5900

    10

    7400

    120

    26000

    100

    3.9

    2880

    113.3

    YJ121

    121

    4-3/4

    38

    1-1/2

    NC38

    1500

    340000

    2200

    490000

    15

    11000

    50

    36000

    265

    60000

    100

    3.9

    4116

    162

    YJ165

    165

    6-1/2

    50

    2

    NC50

    2000

    450000

    2700

    600000

    35

    25800

    95

    70000

    390

    87000

    125

    4.9

    4070

    160

    YJ203

    203

    8

    68

    2-11/16

    6 5/8REG

    2000

    450000

    2700

    600000

    35

    25800

    95

    70000

    490

    110000

    140

    5.5

    4040

    159

    YJ254

    254

    10

    71.4

    2-13/16

    8 5/8REG

    3000

    670000

    5000

    1120000

    55

    40000

    200

    147000

    600

    130000

    140

    5.5

    4100

    161

    YJ356

    356

    14

    76

    3

    8 5/8REG

    8000

    1800000

    19000

    4270000

    150

    110000

    1000

    740000

    600

    130000

    150

    5.9

    4000

    157.4

     Above list some models, other models also can be supplied as follows:YJ178(7"),YJ229(9"),YJ279(11"),YJ305(12").

     Also provide Mechanical-Hydraulic shock absorbers type DHJ.

     

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