Bit protector
Effectively eliminates stick-slip effect during torque jumps
Small overall dimensions allow installation under the downhole motor
Creates optimal weight on bit with damping longitudinal and torsional vibrations
Preview
Bit protector is own original “BURINTEKH”, Ltd development protected by the set of the Russian Federation patents, CU and USA patents.
Bit protector PZ is designed for damping of torsional and axial vibrations, single torsional and axial impacts acting on PDC bit while drilling as well as for provision optimal uniform rock destruction tool loading with axial load.
Application:
Bit protector PZ is used with PDC bits and installed directly above bit both while rotary drilling and drilling with downhole motors.
Bit protector PZP is used with roller-cone bits and installed directly above bit, as well with PDC bits when installed above PDM (or MWD).
Advantages:
- The device makes the feedback between the axial load and the torque on bit, and therefore allows for the automatic control of WOB depending on the torque on it;
- Allows reducing jumps of torque on bit, reducing the phenomenon of twisting of the string during jumps of the reactive torque (“Stick-slip” effect) due to damping of torsional vibrations. The creation of optimal axial loads on bit with damping of the longitudinal and torsional vibrations acting on the bottomhole assembly allows increasing bit life;
- Reducing torsional and axial vibration allows increasing life of the BHA elements, as well as the top drive;
- Reduction of torsional and axial vibration allows improving the working conditions of downhole electronics;
- The large spindle stroke allows compensating large single (peak) loads on bit which allows increasing its resource;
- Small dimensions allow installing the device under a downhole motor.
Characteristics
PZ-108-30 
Specification:
|
Max OD, mm |
108 |
|
Flow channel diameter, mm |
22 |
|
Length, mm |
650 |
|
Installed length (in string), mm |
560 |
|
Weight, kg |
35 |
|
Nominal damping modes: - axial load, kN |
15…135 |
| Max operating tensile load, kN |
200 |
|
Operating temperature, max, ° C |
120 |
|
Damping and cooling fluid |
Environment |
|
Diameter of applicable PDC bits, mm |
118...127 |
|
Tool joints: - top - bottom |
pin Z-76 box Z-76 |
* Due to continuous improvement of products, slight differences from the parameters indicated in the table are possible.
PZ-215-50
Specification:
|
Max OD, mm |
215…219 |
|
Flow channel diameter, mm |
73 |
|
Length, mm |
1610 |
|
Installed length (in string), mm |
1480 |
|
Weight, kg |
330 |
|
Nominal damping modes: - axial load, kN |
25…450 |
|
Damping and cooling fluid |
Environment |
|
Tool joints per GOST 28487-90: - top - bottom |
pin Z-152 box Z-152
|
|
Max static tensile load dangerous for device integrity, kN*m |
4500 |
|
Torque dangerous for device integrity, kN*m |
77 |
|
Diameter of applicable PDC bits, mm |
245-295 |
|
Operating temperature, max, ° C |
120 |
* Due to continuous improvement of products, slight differences from the parameters indicated in the table are possible.
PZ-295-80
Specification:
|
Max OD, mm |
295 |
|
Flow channel diameter, mm |
76,2 |
|
Length, mm |
4685 |
|
Installed length (in string), mm |
4552 |
|
Weight, kg |
1900 |
|
Nominal damping modes: - axial load, kN |
140…450 |
|
Damping and cooling fluid |
Environment |
|
Tool joints: - top - bottom |
pin Z-177 box Z-177 |
|
Diameter of applicable PDC bits, mm |
609 |
|
Recommended make-up torque, kN*m |
65 - 71 |
|
Operating temperature, max, ° C |
120 |
* Due to continuous improvement of products, slight differences from the parameters indicated in the table are possible.
PZP-172-80М
Specification:
|
Max OD, mm |
178 |
|
Flow channel diameter, mm |
50,8 |
|
Length, mm |
4175 |
|
Installed length (in string), mm |
4061 |
|
Weight, kg |
700 |
|
Nominal damping modes: - axial load, kN |
35…130 |
|
Operating temperature, max, ° C |
120 |
|
Damping and cooling fluid |
Environment |
|
Tool joints: - top - bottom |
box Z-133 pin Z-133 |
* Due to continuous improvement of products, slight differences from the parameters indicated in the table are possible.
PZP-215-50
Specification:
|
Max OD, mm |
215…219 |
|
Flow channel diameter, mm |
73 |
|
Length, mm |
1610 |
|
Installed length (in string), mm |
1480 |
|
Weight, kg |
330 |
|
Nominal damping modes: - axial load, kN |
25…450 |
|
Damping and cooling fluid |
Environment |
|
Tool joints per GOST 28487-90: - top - bottom Recommended make-up torque, kN*m |
pin Z-152 box Z-152
27-30 |
|
Max static tensile load dangerous for device integrity, kN*m |
4500 |
|
Torque dangerous for device integrity, kN*m |
77 |
|
Diameter of applicable PDC bits, mm |
245-295 |
|
Operating temperature, max, ° C |
120 |
* Due to continuous improvement of products, slight differences from the parameters indicated in the table are possible.
PZP-244-80М
Specification:
|
Max OD, mm |
244 |
|
Flow channel diameter, mm |
73 |
|
Length, mm |
4576 |
|
Installed length (in string), mm |
4449 |
|
Weight, kg |
1340 |
|
Nominal damping modes: - axial load, kN |
30…450 |
|
Damping and cooling fluid |
Environment |
|
Tool joints: - top - bottom |
box Z-171 pin Z-171 |
|
Diameter of applicable PDM, mm |
240 |
|
Operating temperature, max, °С |
120 |
* Due to continuous improvement of products, slight differences from the parameters indicated in the table are possible.
PZP-295-80
Specification:
|
Max OD, mm |
295 |
|
Flow channel diameter, mm |
76,2 |
|
Length, mm |
2835 |
|
Installed length (in string), mm |
2700 |
|
Weight, kg |
1165 |
|
Nominal damping modes: - axial load, kN |
25…450 |
|
Damping and cooling fluid |
Environment |
|
Tool joints: - top - bottom |
pin Z-177 box Z-177 |
|
Diameter of applicable PDC bits, mm |
375 - 508 |
|
Diameter of applicable PDC bits, max, mm |
660 |
|
Operating temperature, max, ° C |
120 |
* Due to continuous improvement of products, slight differences from the parameters indicated in the table are possible.
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