Shandong Huichi Industry and Trade Co.,Ltd.
| Payment Terms | L/C, D/A, D/P, T/T, Western Union, MoneyGram |
| Supply Ability | 5000 Sets Per Month |
| Delivery Time | Within 15-30 Days |
| Packaging Details | Export Wooden Case And Wooden Palle Or According To Customers' Requirements. |
| Condition | New |
| Warranty Of Core Components | 1 Year |
| Customized | Logo / Packaging / Graphic |
| Machinery Test Report | Provided |
| Size Range | 3-6" |
| Material | High Manganese Steel |
| Processing Type | Forging |
| Thread | NC26,NC31,NC38,NC46,NC50,NC56, 5 1/2FH |
| Length | 9~16m |
| Brand Name | HuiChi (HC) |
| Model Number | Square Kelly Hexagona Series |
| Certification | API Spec 7-1 |
| Place of Origin | China |
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API-7-1 Spec Square Kelly And Hexagonal Kelly For Well Drilling
Product Specification
| Payment Terms | L/C, D/A, D/P, T/T, Western Union, MoneyGram | Supply Ability | 5000 Sets Per Month |
| Delivery Time | Within 15-30 Days | Packaging Details | Export Wooden Case And Wooden Palle Or According To Customers' Requirements. |
| Condition | New | Warranty Of Core Components | 1 Year |
| Customized | Logo / Packaging / Graphic | Machinery Test Report | Provided |
| Size Range | 3-6" | Material | High Manganese Steel |
| Processing Type | Forging | Thread | NC26,NC31,NC38,NC46,NC50,NC56, 5 1/2FH |
| Length | 9~16m | Brand Name | HuiChi (HC) |
| Model Number | Square Kelly Hexagona Series | Certification | API Spec 7-1 |
| Place of Origin | China | ||
| High Light | Drilling Kelly Hexagonal ，Square Kelly Hexagonal ，Weight Bearing kellys hexagon | ||
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The square drill rod produced and sold by our company Huichi Petro is the core power transmission equipment in oil drilling operations. It is located at the top of the entire drill string and connects the top drive (top drive) with the drill string. It transmits the rotational torque and axial pressure generated by the ground power equipment (such as turntable, top drive) to the downhole drill bit, drives the drill bit to rotate and break the rock, and realizes the smooth progress of the drilling operation. Its unique square cross-section design can be adapted to the drilling turntable or top drive slip, ensuring efficient and stable power transmission, and is widely used in land, sea and complex formation drilling operations.
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During drilling operations, the ground power equipment drives the square drill rod to rotate, and the square drill rod is connected to the drill rod column through the connecting thread at its lower end, thereby transmitting the rotational motion to the entire drill rod column and the drill bit. At the same time, during the drilling process, as the depth of the well increases, it is necessary to continuously apply axial pressure to the well. While transmitting the rotational torque, the square drill rod also undertakes the task of transmitting the axial pressure applied by the ground to the drill bit, so that the drill bit can effectively break the rock and realize the continuous deepening of the wellbore.
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The main body of the square drill rod produced and sold by our company Huichi Petro is forged with high-quality alloy steel (AISI 4145H). After heat treatment and surface hardening process, it has extremely high tensile, torsional and compressive strength, and can withstand huge rotational torque and axial pressure.
Square section design: standard 4-sided or 6-sided hollow steel pipe, precisely matched with the turntable square core to avoid slipping, power transmission efficiency> 98%.
Built-in high-pressure sealing assembly, supports circulating drilling fluid (mud) injected into the bottom of the well through the inner hole, and the sealing pressure level is above 5000psi, which is suitable for deep well and ultra-deep well operation needs.
The upper and lower ends are equipped with API standard threads (such as NC50, 6-5/8" Reg, etc.). The upper end is a male thread for connecting a faucet; the lower end is a female thread for connecting a drill string. It can quickly connect the top drive and the drill string to reduce installation time.
Optional protective joints can be used to extend the life of the threads and reduce maintenance costs.
Obvious marks will also be engraved on the outer wall of the square drill rod so that the number of rotations and the lowering depth of the square drill rod can be accurately identified and controlled during drilling operations.
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• Fast delivery: sufficient inventory of conventional models, providing square drill rods of various specifications and sizes to meet different drilling needs. Support 72-hour delivery of urgent orders.
• Customized solutions: professional technical support, providing material upgrades, special specifications, materials and surface-treated square drill rods according to well depth and formation conditions.
• Global warranty: high-quality products, perfect after-sales service, 12-month quality assurance, and professional technical team 24-hour response.
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The specifications and models of square drill rods are mainly divided according to their cross-sectional size and length. Different specifications and models of square drill rods are suitable for different drilling operation requirements. Users can choose suitable square drill rods according to actual drilling process and equipment requirements. Common cross-sectional sizes are 4 1/2 inches, 5 inches, 6 5/8 inches, etc., and the length is generally between 9 meters and 13 meters.
| Nom. Size (in) | Top Connection(LH) | Bottom Connection | I.D. (in) | Drive Section (in) | ||||
| Standard O.D.(in) | Optional O.D.(in) | Square O.D.(in) | Hex. O.D.(in) | Square | Hex. | A | B | |
| 2-1/2 | 6-5/8REG 7-3/4 | 4-1/2REG 5-3/4 | NC26 | 1-1/4 | 3-2/7 | |||
| 3 | 6-5/8REG 7-3/4 | 4-1/2REG 5-3/4 | NC31 4-1/8 | NC26 3-3/8 | 1-3/4 | 1-1/4 | 4 | 3-3/8 |
| 3-1/2 | 6-5/8REG 7-3/4 | 4-1/2REG 5-3/4 | NC38 4-3/4 | NC31 4-1/8 | 2-1/4 | 1-3/4 | 4-1/2 | 4 |
| 4-1/4 | 6-5/8REG 7-3/4 | 4-1/2REG 5-3/4 | NC46 6-1/4 | NC38 4-3/4 | 2-4/5 | 2-1/4 | 5-4/7 | 4-4/5 |
| 6-5/8REG 7-3/4 | 4-1/2REG 5-3/4 | NC50 6-3/8 | NC38 4-3/4 | 2-4/5 | 2-1/4 | 5-4/7 | 4-4/5 | |
| 5-1/4 | 6-5/8REG 7-3/4 | 5-1/2FH 7 | NC46 6-1/4 | 3-1/4 | 3 | 7 | 6 | |
| 6-5/8REG 7-3/4 | NC56 7 | NC50 6-3/8 | 3-1/4 | 3-1/4 | 7 | 6 | ||
| 6 | 6-5/8REG 7-3/4 | 5-1/2FH 7 | 3-1/2 | 6-4/5 | ||||
| 6-5/8REG 7-3/4 | NC56 7 | 3-1/2 | 6-4/5 | |||||
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The square drill rods produced and sold by our company Huichi petro are widely used in drilling operations in various onshore and offshore oil fields. Whether it is conventional drilling, directional drilling or horizontal drilling, the role of square drill rods is indispensable in drilling operations that require efficient transmission of torque and transportation of drilling fluid.
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Product packaging: iron box or iron frame, wooden pallet, wooden box, bulk or customized according to customer requirements.
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100% inspection will be carried out before shipment, and video image data and inspection reports will be provided.
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FOB, CFR, CIF, EXW, FAS, CIP, FCA, CPT, DEQ, DDP, DDU, Express Delivery, DAF, DES.
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Shandong Huichi Industry & Trade is a professional supplier of drilling equipment for the oil and gas industry. We are committed to providing the best products and services to customers around the world.
We HuiChi (HC) Petro always regard our customers as our partners and aim to achieve long-term cooperation value. Our Huichi products cover different fields such as oil fields, water wells, HDD, etc.
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One-stop drilling equipment supply;
Employee engineers have more than 10 years of experience in supplying drilling equipment;
More than 10 people engaged in export business;
More than 40 partner countries and regions;
More than 200 customers having close cooperative relationships;
More than 250+ partner factories as suppliers.
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Company Details
Business Type:
Manufacturer,Exporter,Trading Company,Seller
Year Established:
2021
Total Annual:
3000000-5000000
Employee Number:
10~30
Ecer Certification：
Verified Supplier
We are located in Dongying City, a city established because it owns China's second largest oil field "Shengli Oilfield". It is also the largest petroleum equipment manufacturing center in China. We Huichi have been sparing no effort to provide customers with the best products an... We are located in Dongying City, a city established because it owns China's second largest oil field "Shengli Oilfield". It is also the largest petroleum equipment manufacturing center in China. We Huichi have been sparing no effort to provide customers with the best products an...
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