Overview
Machine Name: Make-up Bucking Unit
Machine Specification:
- Pipe OD: 26.67 mm – 508 mm
- Pipe Length: 1.5 m – 12 m (customizable)
- Low‑gear maximum torque: 50～59 kN·m (high‑torque make‑up gear, working gear)
-
High‑gear torque: 17‑18 kN·m (high‑speed pre‑make‑up, fast rotation at low torque)
Pipe Thread Types: API Spec 5B, API Spec 5CT, API Spec 7‑1, API Spec 7‑2, various metric and imperial threads for drilling tools, oil tubing & casings, as well as premium special threads.
Our OCTG Production Line Thread Make-up Bucking Unit is custom-engineered to perform high-precision make-up and breakout for casings, tubings, drill pipes and premium threaded OCTG couplings. Widely adopted in pipe mills, OCTG finishing workshops and downhole tool service yards, it fully meets the torque criteria defined by API 5CT and API 7K industrial standards.
Two installation options are provided: stationary floor-mounted type and split portable type, covering a wide diameter range from small-bore tubing to large-diameter heavy-wall casing. Three optional core clamping structures include wedge roller clamping, full rotary hydraulic clamping and planetary jaw clamping. The unit is compatible with standard round threads, as well as high-performance gas-tight premium connections like VAM, Hydril and other patented special threads.
Adopting closed-loop hydraulic drive and PLC+HMI intelligent control system, the equipment automatically monitors torque, rotation turns and angular displacement in real time throughout the entire thread make-up and breakout process. All test data is automatically logged and saved in the local database, enabling full production traceability and permanent archiving of quality documents.
It supports manual, semi-automatic and fully automatic operation modes. Such flexible design fits both sporadic repair and maintenance work and high-capacity continuous mass production on dedicated production lines.
Specifications
| Machine Size | Min O.D. | Max O.D. | Min Torque | Max Torque | Application |
| 10″ | 1-5/8″ | 10″ | 500ft-lb | 130000ft-lb | Tubing,drill pipes |
| 15″ | 2-3/8″ | 15″ | 1000ft-lb | 150000ft-lb | Casing,drill pipes |
| 18″ | 2-3/8″ | 18″ | 1000ft-lb | 170000ft-lb | Casing,drill pipes |
| 20″ | 2-3/8″ | 20″ | 1000ft-lb | 190000ft-lb | Large-diameter casing |
| 22″ | 2-3/8″ | 22″ | 1000ft-lb | 190000ft-lb | Large-diameter casing |
| 24″ | 2-3/8″ | 24″ | 1000ft-lb | 190000ft-lb | Large-diameter casing |
| Up to 32″ | 2-3/8″ | Up to 32″ | 1000ft-lb | Custom | Conductor,structural casing |
Product Details
Equipment Composition
Main Mechanical Structure
- Heavy-duty base frame: available in stationary floor-mounted type and split portable type for flexible installation scenarios
- Rotary spindle assembly & main drive head
- Multiple optional clamping assemblies: wedge roller clamping unit, full rotary hydraulic clamping unit, planetary jaw clamping unit
- Travelling carriage and longitudinal sliding feed mechanism
- Inlet and outlet pipe support roller stands
- Full-enclosure safety protective cover
Hydraulic System
- Centralized hydraulic power pack
- Hydraulic cylinders for clamping, feeding and material pushing functions
- Closed-loop proportional control valves for precise torque adjustment
- Hydraulic oil tank, heat exchanger, oil filtration units and complete connection piping
Torque Testing & Real-Time Detection System
- High-accuracy torque transducer
- Rotary revolution and angle encoder
- Pressure monitoring sensors & displacement monitoring sensors
Drive and Transmission Unit
- Hydraulic motor matched with reduction gearbox assembly
- Torque feedback transmission mechanism
- Positioning brake assembly
Electrical Control System
- PLC control cabinet
- HMI touchscreen operation interface
- Embedded data acquisition & logging module to realize full production traceability
- Travel limit switches, emergency stop pushbuttons and safety interlock protection devices
Auxiliary Functional Components
- Centralized automatic grease lubrication system
- Cable trunking system and insulated protective wiring ducts
How to Choose Your Bucking Unit Configuration
GH Petro’s technical engineering team will send you our technical proposal and layout to meet your job.
Pls kindly let us get your specification request as follows:
- D.Range:Minimum and maximum pipe/tool diameter you will handle
- Torque Range:Required make-up and break-out torque,peak and typical
- Thread Family:Premium connection brand(VAM,Hydril,Tenaris…),API spec or proprietary
- Daily Output Target:Joints per shift/day at typical workload
- Floor Space:Workshop length,ceiling height,lifting equipment
- Power Supply:Voltage,phase,frequency and any site limits
- Accessories:Support stands,jaw inserts,CRA handling,jaw protection
Why Choose Our Bucking Machine?
- Precise torque & angle closed-loop control, ensures API standard qualified threaded connection for OCTG casing and tubing
- Large clamping range, compatible with various OCTG pipe sizes, grades and thread types
- Stable hydraulic driving system, effectively avoids thread galling, deformation and damage during make-up
- Automatic pipe centering device, solves pipe bending deviation, guarantees coaxiality of threaded joints
- Human-machine touch screen operation, stores multiple make-up parameters for quick model switching
- Heavy-duty rigid frame structure, long service life, low failure rate and easy daily maintenance
- Real-time data recording and printing function, traceable bucking records for quality inspection
- High bucking efficiency, perfectly matched with OCTG heat treatment & threading production line
Our Achievements
As a professional manufacturer of bucking machines, GH Petro has extensive experience in overseas cooperation. We supply high-quality bucking unit to customers worldwide, including those from the United States, the UAE, Saudi Arabia, Egypt, Indonesia, Malaysia, India, Thailand, South Africa and other countries.
Please feel free to contact us should you have any requirements. Our team will prepare a tailored technical proposal in accordance with your specifications.
Packaging&Delivery
- Steel pallets and iron sheets are packaged together.
- Shipment can be arranged by sea, train or as per the customer’s requirements.
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