What is a Bucking Units?
  • A bucking unit is a hydraulic machine used in the oil and gas industry primarily for making up or breaking out threaded connections in drilling tools and other downhole tools.
  • This includes operations such as screwing together or unscrewing drill pipe, casing, tubing, and other tool joints.
  • Bucking units come in various configurations, including horizontal, vertical, and mobile units, and can handle a wide range of tool sizes and types.
How to Use a Bucking Units?
  • The tool or pipe to be worked on is secured in the bucking unit, which has powerful clamping and rotational mechanisms.
  • For making up (assembly), the bucking unit rotates one part of the tool to screw it onto another part, applying precise torque to achieve a secure connection.
  • For breaking out (disassembly), the unit applies rotational force in the opposite direction to unscrew the parts.
  • The bucking unit typically provides real-time monitoring and recording of the applied torque, turns, and shoulder position to ensure proper connection/disconnection and quality control.
What Can Users Do With a Bucking Units?
  • Users can safely and efficiently assemble and disassemble drill string components, casing, tubing, and downhole tools.
  • They can apply precise torque to connections, ensuring the integrity of the assembled tools.
  • They can track and record data on makeup/breakout operations for quality control and auditing purposes.
Benefits of a Bucking Units
  • Efficiency: Bucking units significantly increase the efficiency of makeup and breakout operations compared to manual methods.
  • Safety: They reduce the risks associated with manual handling of heavy and sometimes high-pressure components.
  • Precision: Bucking units provide precise control over torque and rotation, ensuring proper assembly and disassembly of tools.
  • Versatility: They can handle a wide range of tool sizes and types, making them versatile for various oilfield operations.
  • Quality Control: By monitoring and recording operation data, bucking units support quality control and traceability in tool assembly and maintenance.
  • Cost Saving: By improving efficiency and reducing the risk of damage during makeup and breakout operations, bucking units can contribute to cost savings in drilling operations.

DZZR- Break Out Unit

DescriptionTechnical SpecificationQty

Hydraulic power system

( Oil tankcapacity:600 L)

Working medium: No. 46 wear resistant hydraulic oil)

Motor: power is 22KW, speed is 1460RPM required voltage is 380V, frequency is 50HZ.1
Hydraulic pump type: Vane pump
Max. working pressure: 2300 Psi
Hydraulic operation console dimension: 55〃*35〃*44〃
Hydraulic oil cooling system: Mandatory Air cooling
make up/ break out main engineAdjustable tongsApplicable pipe range:2-4/7〃-15〃(NOT Fixed)1
Max. clamping pressure of single cylinder: 45000LBS(NOT Fixed)
Shock screwing tongs

Applicable pipe range:2-4/7〃-15〃(NOT Fixed)

(Φ200-380mm need change tooth block)

Make up torque:110000 Ft.1b (NOT Fixed)
Break out torque:140000 Ft.1b (NOT Fixed)
Shock screwing angle:35° (NOT Fixed)
BaseLength:19-9/13 ′ (NOT Fixed)
SpeedThe clamping speed of the six cylinders is 900mm/min (NOT Fixed)
 Tongs spacingThe largest spacing:9-6/7 ′ (NOT Fixed)
The minimum distance:4-3/4〃(NOT Fixed)
Quick make up/ break out unitStructure type: Open rotary1
Torque:2900 Ft.1b (NOT Fixed)
Applicable pipe range:2-7/8〃-16〃 (NOT Fixed)
Feel deviceMoving dolly

Quantity: 2

Unit rated supporting force:  4500LBS,

Supporting range: 73-245mm

Feel railLength:13-1/8′ (NOT Fixed)
Tail frame push-pull device (with 1 sets jack type moving support device)Moving dolly

Quantity: 1

Unit rated supporting force: 4500LBS,

Supporting range: 73-245mm (NOT Fixed)

Push-pull cylinderStroke:2000mm (NOT Fixed)
Max. pulling force:40500LBS (NOT Fixed)
Max. pushing force:54000LBS (NOT Fixed)
Push-pull cylinder railRail length:26-1/4′ (NOT Fixed)
Cylinder  SynchronizerThe standardOrigin: Shanghai china.
Cylinder sealThe standardTaiwan.
Connection sealThe standardTaper sealing.
Torque meterThe standardThe measured torque, It’s not the result of calculation.
Touch screen computerThe standardReal-time display of torque and curve,It can be printed and stored.