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By-Pass Valve

Product Detail

    By-Pass Vavle1430359455104945.jpg

    During drilling operation, when well kick is taken place and bit bore is blocked. The by-pass valve can be opened to go fluid circulation and well killing .Before drilling in flow gas formation, the by –pass valve shall be located near or on the bit.
    When take place well kick and pump pressure is too high or blocked, the following steps can be taken to open the by-pass valve :
    ● Discharge Kelly and drop in a steel ball (or a Nylon ball) which is carried by tool;
    ● Connect with Kelly;
    ● Put ball into retainer by pump circulation;
    ● When fluid is closed, the shear pin can be sheared off with adding 0.5~1.5Mpa pump pressure than original pump pressure;
    ● After pin is sheared, the seal sleeve move down to open the discharge hole and pump pressure come to drop down , then normal circulation and well killing operation can be started.
    When ordering please specify:
    ● O.D. of body;
    ● Connection;
    ● Pump pressure to shear off pin if other than standard.




    Specifications - By-pass Valve

    Model

    Product Code

    O.D.

    (mm)

    Seal sleeve

    (mm)

    Top Connection

    (BOX)

    Bottom connection

    Pump Pressure of

    shear-off shear pin

    O.D. of Steel ball

    (mm)

    PTF105

    F061053

    105

    32

    NC31

    NC31(PIN)

    3-10MPa

    35

    PTF121A

    F061213

    121

    38

    NC38

    NC38(PIN)

    3-10MPa

    45

    PTF127

    F061273

    127

    38

    NC38

    NC38(PIN)

    3-10MPa

    45

    PTF127C

    F061272

    127

    38

    NC38

    3 1/2 REG(BOX)

    3-10MPa

    45

    PTF159

    F061591

    159

    49

    NC46

    NC46(PIN)

    3-10MPa

    54

    PTF159B

    F061594

    159

    49

    NC46

    4 1/2 REG(BOX)

    3-10MPa

    54

    PTF168

    F061681

    168

    50.8

    NC50

    MC50(PIN)

    3-10MPa

    57

    PTF203

    F062031

    203

    62

    6 5/8 REG

    6 5/8 REG(PIN)

    3-10MPa

    65


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