| After-sales Service: | Provided |
|---|---|
| Warranty: | 12months |
| Manufacturing Process: | Forging |
| Surface Treatment: | Spray-Paint |
| Operation Pressure: | Atmospheric Pressure |
| Material: | Alloy |
| Customization: |
|---|
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Audited Supplier Heavy weight drill pipe is a medium-weight drill tool similar to drill pipe, whose wall is thicker than that of drill pipe and thinner than that of drill collar. Its tube is connected with special length-added drill pipe joint (integral heavy weight drill pipe is made up of tube and tool joint). Among assemblies, it is generally added between drill pipe and drill collar to prevent sudden changes in cross-section of drill string, and reduce its fatigue. Using it to replace part of the drill collar can reduce torque, improve load and increase drilling ability during deep well drilling; meanwhile pick-up sub and safety clamp will not be used drilling operation ,which is easy to operate and can save tripping time. It can drill in in high speed under low torque in directional wells and reduces the abrasion and fracture of string without differential pressure and sticking because of the lower steel grade than drill collar, small touching area with the well wall.
It is made from premium alloyed steel (4145H, or 4145H MOD ). The hard facing welded on the two ends and middle upset are to protect the pipe being weared. Production complies with the provisions under the Standard SY/T 5146-1997. Connector screws comply with the provisions of the Standard API SPEC 7-1.
Manufacturing Process
| Nominal size | Pipe body | Tool joint | Weight Kg/PC | ||||||
| D (mm) | d (mm) | Upset dimension | RSC type | DJ(mm) | ID (mm) | HSC bevel dia DF (mm) | |||
| Center dia. Dm (mm) | End dia. DTE (mm) | ||||||||
| 3 1/2 | 88.9 | 57.4 | 101.6 | 98.4 | NC38 | 127 | 52.4 | 116.3 | 312 |
| 3 1/2 | 88.9 | 57.2 | 101.6 | 98.4 | NC38 | 127 | 57.2 | 116.3 | 282 |
| 4 | 101.6 | 65.1 | 114.3 | 106.4 | NC40 | 133.4 | 65.1 | 127.4 | 370 |
| 4 1/2 | 114.3 | 69.9 | 127 | 119.1 | NC46 | 158.8 | 69.9 | 145.3 | 558 |
| 5 | 127 | 76.2 | 139.7 | 130.2 | NC50 | 168.3 | 76.2 | 154 | 672 |
| 5 1/2 | 139.7 | 92.1 | 152.4 | 144.5 | 5 1/2FH | 184.2 | 92.1 | 170.7 | 776 |
| 6 5/8 | 168.3 | 114.3 | 184.2 | 176.2 | 6 5/8FH | 203.2 | 144.3 | 195.7 | 964 |
Xi′an BOBAN Oil Tools Co., Ltd. Make & Supply a full line of equipment for O& G, horizontal directional drilling (HDD), micro-tunnelling, pipe jacking, etc, In O& G section, we can supply drilling rig component, downhole drilling tools, fishing tools, tubular handling tools, well control equipments, drilling fluid mixing & Recycling system, solid controling equipments and other relevant oiltools,
All our products are API certified, and we are also authorized by ISO: 9001-2000. With advanced production facilities, rigorous quality management, and the joint efforts of our experting staff, Boban has been qualified vendor for many renowned companies in Italy, Germany, Poland, UAE, Kuwait, Egypt, & South East Asia, etc since its establishment in 2018. And obtained a good reputation among the offshore customers as well as other industrial clients.
With our reasonnal prices, quick reaction, high quality products and deliver anywhere on time as well as superior service, Boban has stablished good cooperation relationship with many well-known customers in the world, and also wish to have the chance to work with more and more customers from all over the world!
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Audited Supplier 
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