Advantages:

1. Precise calculating to choose the pipe raw material for each layer.

2. Know well about the rig of Bauer, Sany and other famous brands.

3. Rich experience from the construction sites.

4. Automatic welder to promote the overall quality.

5. Guaranteed after-sales.

A rotary kelly bar is used between the rotary drilling rig and the rotary drilling tools to transmit torque, axial pressure and other loads. It is a tubular structure that expands and contracts section by section along a common axis.Itconsists of several sections of steel pipes with different diameters and internal and external keys.

Parameter:

What parts does a complete rotary kelly bar consist of?

1. Kelly eye: It is a component that connects the kelly bar and the lifting unit.

2. Bolt: Fix the flange.

3. Baffle: It can prevent the kelly bar from being carried when the kelly bar is lifted.

4. Damping rubber: reduce the impact on the rig during drilling and protect the rig.

5. External key: used to transmit torque and pressure, and play a guiding role.

6. Taper key: play a guiding role and facilitate the pressurization and unlocking the block.

7. Pressure block: used to transfer pressure.

8. Pallet: Flowing water protects the end of the kelly bar.

9. Spring: play a dual role of protecting the kelly bar and the rig.

10. Kelly stub: transfer pressure and torque to the drilling tools.

11. Retaining ring: play a role of limiting and positioning.

12. Swivel: positioning, wear-resistant.

13. Internal key: used to transmit torque and pressure, play a role in positioning and guiding.

Kelly bar types as below:

Rotary kelly bars are mainly divided into two structural forms: friction kelly bars and interlocking kelly bar.

The friction kelly bar refers to the kelly bars through which the shaft pressure is transmitted between the layers of pipe through friction when the rotary drilling rig is drilling. The friction kelly bar has the characteristics of simple operation and large drilling depth. It is mainly suitable for soft ground construction, such as clay, silt, silty soil, artificial backfill and stratum containing some pebbles and gravel.

The interlocking kelly bar refers to When the rotary drilling rig is drilling, the kelly bar that transfer pressure between each layer of pipes through the pressure lock block. The operation of the interlocking kelly bar is relatively complicated, and the drilling depth is relatively shallow. However, the interlocking kelly bar can transmit a larger pressure through the pressure point and can be used for drilling in rock formations, such as strong weathering, moderate weathering, and slightly weathering rock formation.

Production of kelly bar:

A good kelly bar must undergo rigorous testing from material selection to welding to assembly. The quality of our kelly bar is reliable. The raw materials of key components such as steel pipes, keys and kelly stub are all customized from well-known domestic manufacturers. The steel has high purity and quality assurance; strong comprehensive capabilities such as torsion, compression and vibration resistance; Excellent grinding performance and long service life.

Shipment and package of kelly bar:

1. Package: iron support and wrapped with plastic film

2. Transportation: by sea, land and air.

3. Main ports: Manzhouli, Tianjin, Qiangdao, Shanghai, Yiwu, Taizhou, Shenzhen, Guangzhou, Ruili, Pingxiang, Horgos, etc.

4. Delivery: Fast and timely delivery.

Our kelly bars at construction sites:

1. Technologists' regular investigation on construction sites promotes product optimization and innovation.

2. Macbon kelly bar with high and stable quality has been highly recognized by the customers, and widely introduced to other customers.

3. Tips for rotary drilling rig working:

A) The site must be leveled, secure, and determined by the ethanol level on the rotary drilling rig and work experience inspection as the standard.

B) If the infield is made into holes, blind piles or geological soft belts, signs must be set.

C) When working in rainy seasons, there must be countermeasures for drainage pipes on the spot.