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Workover fishing tool
BY-PASS VALVE
- Type:Workover fishing tool
- CAS No:
- Qty in 20' FCL:
- Min. Order:
- Packaging:
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-
Model
O.D.(mm)
Seal sleeve
(mm)
Top Connection
(BOX)
Bottom
Connection
Pump Pressure of
Shea –off shear pin
O.D. of Steel ball
(mm)
PTF105
105
32
NC31
NC31(PIN)
3~10Mpa
35
PTF121A
121
38
NC38
NC38(PIN)
3~10Mpa
45
PTF127
127
38
NC38
NC38(PIN)
3~10Mpa
45
PTF127C
127
38
NC38
3 1/2REG (BOX)
3~10Mpa
45
PTF159
159
49
NC46
NC46(PIN)
3~10Mpa
54
PTF159B
159
49
NC46
4 1/2REG(BOX)
3~10Mpa
54
PTF168
168
50.8
NC50
NC50(PIN)
3~10Mpa
54
PTF203
203
62
6 5/8REG
6 5/8 REG(BOX)
3~10Mpa
65
-
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.
