Jining Donghong Machinery Co., Ltd
Quality supplier of drilling rig parts for Bomco,Lanzhou LS, Honghua, Sj petro, Rg Petro, Beijing BPM, Shenkai, Kingdream, CCDC

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Product Detail
By-Pass Valve  PTF105 
Brand: 0012
Present point: 0
Point offset: 0.0

By-Pass Valve


During drilling operation, when a well kick takes place and bit bore is blocked, the by-pass valve can be opened to allow fluid circulation and well killing. Before drilling in a gas formation, the By-Pass valve shall be located near or on the bit.

When well kick take place 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 by adding 0.5~1.5MPa higher 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.

Available model:

PTF105   PTF121A   PTF127   PTF127C   PTF159   PTF159B   PTF168   PTF203

When ordering please specify:

●O.D. of body;


●Pump pressure required to shear off pin (per customer requirement)

Specifications - By-Pass Valve

  1   By-pass valve   PTF105   105   32   NC31   NC31 (PIN)   3-10 MPa   35

  2   By-pass valve   PTF121A   121   38   NC38   NC38 (PIN)   3-10 MPa   45

  3   By-pass valve   PTF127   127   38   NC38   NC38 (PIN)   3-10 MPa   45

  4   By-pass valve   PTF127C   127   38   NC38   3 1/2 REG (BOx)   3-10 MPa   45

  5   By-pass valve   PTF159   159   49   NC46   NC46 (PIN)   3-10 MPa   54

  6   By-pass valve   PTF159B   159   49   NC46   4 1/2 REG (BOx)   3-10 MPa   54

  7   By-pass valve   PTF168   168   50.8   NC50   NC50 (PIN)   3-10 MPa   57

  8   By-pass valve   PTF203   203   62   6 5/8 REG   6 5/8 REG (PIN)   3-10 MPa   65